Service equipment for gas spaces

Abstract

To provide a service facility (1) for a gas space (2.1 to 2.n).SOLUTION: A service facility (1) includes: a gas treatment device (3) for treating gas present in at least one gas space (2.1 to 2.n); at least one sensor device for monitoring at least one gas property of the gas; at least one connection part (7.1 to 7.n) coupled to the gas treatment device (3) and the at least one sensor device, and configured for coupling to the gas space (2.1 to 2.n); at least one pressure feeding device (8) for pressure feeding the gas from the gas space (2.1 to 2.n) into the gas treatment device (3) and from the gas treatment device (3) at least indirectly back into the gas space (2.1 to 2.n); and at least one control unit (22) which is connected to at least the sensor device and monitors and controls the at least one pressure feeding device (8) and / or the gas treatment device (3).SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a service installation for a gas space. [Background technology]

[0002] From the prior art, installations, for example electrical switchgear installations, with a gas space are generally known, in which the gas space is a repository for gas-insulated electrical high-voltage operating means, such as electrical circuit breakers and instrument transformers.

[0003] Such electrical high-voltage operating means are filled with insulating and fire-extinguishing gas as protective gas, for example sulfur hexafluoride, abbreviated as SF6. The protective gas is enclosed in the corresponding gas space under a certain minimum pressure, for example an overpressure of 6 bar, and extinguishes the arc that occurs between the electrical contacts when they are opened. In this case, safe functioning depends in particular on the purity of the protective gas, which can be impaired in particular by the ingress of moisture or air into the protective gas volume or by the appearance of decomposition products of the protective gas.

[0004] Even if the operating pressure of the gas space is several times atmospheric pressure, it is usually impossible to avoid, for construction reasons, that moisture in the form of water vapor will penetrate into the gas space by diffusion. Water vapor penetrating into the gas space reduces the purity of the protective gas and thus reduces the electrical properties of the protective gas, in particular the dielectric constant of the protective gas. However, as a rule, the proportion of moisture in the protective gas should be small so that the pressure dew point temperature of the protective gas of -5 ° C is not exceeded.

[0005] To achieve this, a device is known from EP 3 283 833, which device: a first gas space and a second gas space filled with a protective gas; A pipeline system connecting the first gas space and the second gas space; A compressor disposed in the pipeline; a gas drying assembly disposed within the pipeline; - means for detecting the gas pressure in the pipeline; a valve operable to allow the compressor to selectively pump gas from the first gas space to the second gas space and from the second gas space to the first gas space; - means for controlling the compressor based on the gas pressure inside the pipeline; means for controlling the valve based on a desired direction of pumping of gas; Furthermore, a method is described for drying a gas space by means of a protective gas atmosphere present in the gas space under an overpressure having an operating pressure and a predefined minimum pressure, in which the predefined minimum pressure of the gas space is monitored and the operating pressure is greater than the minimum pressure. - removing a first partial quantity of protective gas from the gas space, said partial quantity being equivalent to a pressure difference which is less than or equal to the difference between the operating pressure and the minimum pressure; introducing a second partial quantity of dry or dried protective gas into the gas space until a gas pressure is reached that is greater than the minimum pressure; repeating the aforementioned method steps after a predefined waiting time. Includes. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] European Patent No. 3283833 Summary of the Invention [Problem to be solved by the invention]

[0007] The object of the present invention is to provide a new type of service installation for gas spaces. [Means for solving the problem]

[0008] The above problem is solved according to the invention by a service facility having the features set forth in claim 1.

[0009] Advantageous embodiments of the invention are the subject of the dependent claims.

[0010] The service installation according to the invention for a gas space comprises a gas treatment device for treating the gas present in at least one gas space, in particular in order to maintain or restore the functionality of the gas, the gas treatment device being configured to perform purification and / or drying and / or temperature conditioning of the gas. Furthermore, the service installation comprises at least one sensor device for monitoring at least one gas property of the gas, in particular configured to detect as gas properties the gas pressure and / or the gas density and / or the gas temperature and / or the gas humidity and / or the concentration of decomposition products in the gas, in order to be able to precisely control the gas treatment device, for example for dehumidification and / or purification of the gas. Furthermore, the service installation comprises at least one connection connected to the gas treatment device and the at least one sensor device, the at least one connection being configured for connection to the gas space, the service installation comprising at least one pumping device for pumping the gas from the gas space to the gas treatment device and for at least indirectly returning it from the gas treatment device to the gas space. Furthermore, at least one control unit is provided, which is connected at least to the sensor device and which monitors and controls at least the pumping device and / or the gas treatment device.

[0011] The service installation allows reliable gas handling in at least one gas space, for example the gas space of an electrical switchgear installation.

[0012] In one possible embodiment of the service installation, the service installation is configured by the control unit to determine the gas volume in the connected gas space based on a known volume of the line between the connection and the gas treatment device and / or based on a known volume of the connecting hose with which the connection is formed and / or based on a known volume of the gas storage tank of the gas treatment device. Furthermore, the service installation in this embodiment is configured by the control unit to fill the connecting hose, the line between the connection and the gas treatment device and the gas storage tank with gas in stages when removing gas from the gas space and at the same time monitor the gas pressure inside the gas space, or to fill the gas space with the removed gas in stages when removing gas from the connecting hose, the line between the connection and the gas treatment device and the gas storage tank and at the same time monitor the gas pressure inside the gas space and determine the gas volume in the gas space based on the pressure change determined when monitoring the gas pressure inside the gas space. To monitor the gas pressure inside the gas space, the control device in particular uses a pressure sensor of the sensor device, which pressure sensor is, for example, connected as directly as possible to the gas space. Before the gradual filling with gas or before the withdrawal of gas from said known volumes, a defined initial state is advantageously established, for example by evacuating said volumes or by applying to said volumes a predefined pressure that is greater than the current operating pressure of the gas spaces. Alternatively, the currently existing initial state may be determined by a sensor inside the service installation. The above-mentioned gradual filling with gas or withdrawal of gas from the known volumes then results in a gradual pressure equalization between said volumes and the gas spaces. The above-mentioned embodiment of the service installation allows a particularly accurate automatic determination of the internal free volume of the connected gas spaces. The internal free volume of the gas spaces is a variable that is often not even known precisely by the operator of the gas spaces himself. This embodiment therefore allows the service installation to determine the unknown volume and to take this variable into account in order to carry out the safety-related control processes more reliably and efficiently.As a result of determining the volume of the gas space, it is possible to accurately set and control, for example, the amount of gas that can be removed from the gas space during a gas treatment process without reaching or falling below a certain minimum pressure in the gas space.

[0013] In a further possible embodiment of the service facility, several connecting hoses each having different lengths can be used, for which purpose several defined different lengths are specified and stored in order to determine the volume of the connecting hose with which the connection is made. It is also possible to manually input the length and, if necessary, the cross-sectional area of ​​the connecting hose to be used via a user interface. This makes it possible to use connecting hoses with long lengths, for example in cases where access to the gas space is difficult, and makes it possible to dispense with hose extensions where the pressure is not monitored. At the same time, it is not necessary to use the longest possible connecting hoses all at once, so that the effectiveness of the gas treatment is not impaired.

[0014] In a further possible embodiment of the service facility, the service facility is configured by the control unit to determine a lower first operating point and an upper second operating point from a minimum pressure of the gas, a rated pressure of the gas and a maximum pressure of the gas, where the lower first operating point is in particular above the minimum pressure and the upper second operating point is in particular below the maximum pressure. Furthermore, the service facility can be configured by the control unit to automatically start the gas treatment process by introducing fresh gas into the gas space if the rated pressure is closer to the lower first operating point than to the upper second operating point until the upper second operating point is reached, and to automatically start the gas treatment process by removing gas from the gas space if the rated pressure is closer to the upper second operating point than to the lower first operating point until the lower first operating point is reached, and / or to select a gas volume to be removed from the respective gas space when performing the gas treatment process such that the gas pressure inside the gas space after the gas volume is removed is above the minimum pressure, in particular above the lower first operating point. In this case, it is always possible to remove a relatively large gas volume from the gas space for gas treatment without the gas pressure inside the gas space falling below a minimum pressure, and due to the maximization of the gas volume removed and, as a result, due to the minimization of the waiting time required for the freshly charged gas in the gas space to be completely mixed with the gas already present in the gas space, the operability of the gas space, in particular of the electrical operating means arranged inside the gas space, for example an operating circuit breaker, is guaranteed even during gas treatment, while at the same time large gas volumes can be treated.

[0015] The minimum and maximum pressures are safety-related parameters of the gas space, which are usually specified by the manufacturer or operator of the gas space and must be respected during operation of the gas space. The rated pressure is also usually a predefined value that represents the pressure to which the gas space should be filled during normal operation. This value is also called the operating pressure or the standard operating pressure. If the pressure inside the gas space reaches the minimum or maximum pressure, this usually leads to the activation of an alarm. If the gas space is, for example, part of a gas-insulated switchgear or if it contains electrical operating means, such an alarm may in some circumstances lead to the deactivation of the operating means or the entire installation, since safe operation is no longer guaranteed. Such alarm cases are often associated with huge follow-up costs for the operator of the gas space. By specifying two operating points, the service installation in this possible advantageous embodiment makes it possible to avoid the activation of an alarm during the gas treatment process, since the service installation is arranged to change the pressure inside the gas space only within the range between a lower first operating point and an upper second operating point. This makes it possible to prevent minimum or maximum pressures from being reached, so that the service installation can carry out gas treatments with high reliability and safety, even in the operating gas space.

[0016] In principle, such operating points may be defined by user input - provided that the user is familiar with the safety- and control-relevant parameters of the gas space and the service installation, from which a safe operating point can be derived. Automatic determination of the operating point by the service installation itself or by the control unit eliminates the need for corresponding knowledge by the user and thus allows for an easy use of the service installation, with the same time maximizing reliability and safety.

[0017] In particular, in a further development of this embodiment, the service facility can be configured by the control unit to define an interval between the minimum pressure and the lower first operating point and an interval between the upper second operating point and the maximum pressure such that the maximum measurement uncertainty of the sensor device, the absolute pressure inside the gas space, the temperature of the gas, the closed-loop control behavior, the open-loop control behavior or response behavior of the control device and / or the temperature changes inside the gas space are taken into account.

[0018] In a situation where the minimum pressure (Pmin), the rated pressure (Pnom), and the maximum pressure (Pmax) are sufficiently separated from each other, when determining the lower first operating point (Pa1) and the upper second operating point (Pa2), these pressures are often Pmin <Pa1<Pnom<Pa2<Pmax This becomes the variable ratio.

[0019] In such a case, a very safe and reliable gassing is possible. However, if the interval between the minimum pressure (Pmin), the rated pressure (Pnom) and the maximum pressure (Pmax) is very narrow, a situation may occur with an increased risk of an alarm being triggered during the gassing. Thus, for example, both operating points determined by the control unit may be located above or below the rated pressure. It may be difficult for a user to recognize and correctly evaluate such a situation. Therefore, in a further possible embodiment, the service facility is configured by the control unit to determine whether the gassing process can be reliably performed automatically based on the operating points, for which the service facility can start the gassing process only if the user has confirmed that the lower first operating point is treated as equivalent to the rated pressure if the lower first operating point is greater than the rated pressure. The service facility can start the gassing process only if the user has confirmed that the upper second operating point is treated as equivalent to the rated pressure if the upper second operating point is less than the rated pressure. By equating the operating point with the rated pressure, the distance to the nearest limiting pressure (minimum or maximum pressure) is indeed narrowed, but the risk of activating an alarm or of setting up a dangerous pressure state in the gas space is still significantly lower than if the operating point were directly at the limiting pressure. The service installation thus proposes useful parameter adaptations to the user, which the user can accept after weighing the risks. If both operating points are at the same value, or even if the upper second operating point is smaller than the lower first operating point, the service installation interrupts the gassing process. It can be ensured in this way that the user can automatically recognize multiple risks and efficiently decide which parameters should be adapted if he is able to accept them taking into account the risks that arise. This allows the gassing by the service installation to be carried out safely in a great many situations, while at the same time automatically preventing the gassing from being carried out in dangerous situations.This further contributes to simplifying the handling of the service installation and to enabling a high degree of safety.

[0020] In a further possible embodiment of the service facility, the gas treatment device comprises at least one dryer filter for absorbing moisture. Such a dryer filter allows reliable drying of the gas, is available at low cost and is easy to use. Alternatively or additionally, the gas treatment device comprises at least two humidity sensors, a first humidity sensor being at least indirectly coupled to an input of the at least one dryer filter and a second humidity sensor being at least indirectly coupled to an output of the at least one dryer filter. The humidity sensors are coupled at least to a control unit, which determines the filling state of the at least one dryer filter from the humidity value determined by the humidity sensor. This allows a simple and reliable detection of the filling state of the at least one dryer filter, and thus an evaluation of the degree of hygroscopicity of the dryer filter. From this in turn it can be derived how long the gas must remain in the dryer filter or how often the gas must be pumped through the filter to achieve the desired drying effect.

[0021] In a further possible embodiment of the service facility, the gas treatment device comprises at least two drying filters for absorbing moisture, which can be used in an alternating manner, so that while one drying filter is in use, at least one remaining drying filter can be dried, for example by supplying it with warm air.

[0022] In a further possible embodiment of the service installation, the sensor device or the control unit is or can be coupled digitally or electrically to at least one gas space sensor for detecting at least one gas property, which is arranged in or adjacent to the gas space and is a component of the installation containing the respective gas space. The coupling can be performed directly by the gas space sensor or indirectly via the switchboard of the installation. This significantly reduces the complexity and costs of the service installation due to the use of existing sensors in the installation containing the gas space. Furthermore, the monitoring of the gas space sensor can be used as an additional safety function, so that possible dangerous states of the gas space, for example a sudden pressure drop in the gas space, can be reliably detected and the service installation can be shut down if necessary. The gas space sensor can in particular be an electronic pressure transmitter, temperature transmitter and / or gas density transmitter. Furthermore, the gas space sensor may be a so-called gas density monitor, which signals via a switching output that the pressure and / or gas density has reached a certain limit value, e.g. that a certain minimum or maximum pressure in the gas space has been reached.

[0023] In a further possible embodiment of the service installation, the control unit is coupled or can be coupled to at least one gas space monitoring unit, which is coupled to a switchboard of the installation or to a gas space sensor arranged in or adjacent to the gas space, and which is configured to shut down the service installation if a dangerous state of the gas space is signaled by the switchboard or the gas space sensor. For example, a switching signal can be picked up by the gas space monitoring unit, which is used, for example, for a safety shutdown or to initiate an alarm based on a switching point stored in the at least one gas space sensor, for example a gas density monitor. This allows the service installation to also be automatically deactivated by the gas space monitoring unit in the event of a safety shutdown of the installation containing the gas space.

[0024] In a further possible embodiment of the service installation, the service installation comprises at least two, for example up to six, connections connected to the gas treatment device and to at least one sensor device, each of the connections being configured for connection to at least one gas space. Furthermore, the service installation comprises a switching device for switching at least one switching element for opening and closing the connections, the switching device being connected to a control unit, which is configured to automatically drive the at least one switching element, whereby the degree of automation and the operating comfort can be increased and the operating personnel can be reduced. By means of the multiple connections, advantageously multiple gas spaces, for example multiple gas spaces of an electrical switchgear installation, can each be simultaneously connected to the service installation, and the gas treatment of the gas contained inside the respective gas spaces can be performed by switching between the multiple different connections performed by the switching device, without the need to remove the connection from one gas space and then install it in a further gas space, as opposed to the solutions known from the prior art. This, on the one hand, significantly reduces the installation and time costs, and, on the other hand, significantly increases the service life and operational safety of the connection and service installation as well as the corresponding connections of the gas spaces due to the reduced number of installation and removal processes. The connections can advantageously be configured in such a way that the service installation can also be operated if the gas spaces are not connected to each of the available connections. For this purpose, the connections can be provided with, for example, self-locking couplings.

[0025] In a further possible embodiment of the service installation, the switching device comprises a number of decentralized switching elements, each of which is coupled to a connection and is configured to open and close the corresponding connection. In contrast to a central switching element, such switching elements can be individually replaced or repaired in the event of a failure, which results in significantly lower costs and material expenditure. Furthermore, the decentralized switching elements allow the individual connections to be opened and closed individually, which allows targeted individual control and implementation of the gas treatment processes in the connected gas spaces.

[0026] In a further possible embodiment of the service installation, the decentralized switching elements of the switching device are arranged directly at the respective associated connection, making it possible to minimize the dead volume beginning with the gas space after the respective connection.

[0027] In a further possible embodiment of the service installation, the respective decentralized switching element of the switching device and the associated connection are formed in the connecting hose. This allows a particularly simple, reliable and flexible connection between the service installation and the gas spaces, and at the same time simplifies handling. For example, one end of the connecting hose is connected to the service installation, while the switching element and the associated connection are arranged in a section of the other end of the connecting hose. This advantageously allows interrupting the connection to the gas space immediately behind the coupling of the gas space to which the connecting hose is connected. Thus, for example, in the event of a fault, i.e. in the event of a leak in the connecting hose, leakage of gas from the gas space can be effectively prevented.

[0028] In a further possible embodiment of the service installation, the sensor device comprises a plurality of distributed sensors for detecting at least one gas property, each sensor being coupled to a respective connection, in which case, in the event of a sensor failure, continued operation is possible at the further connections.

[0029] In a further possible embodiment of the service installation, the distributed sensors of the sensor device are arranged directly at the respective associated connection, in which case it is possible to detect the gas properties particularly close to the respective connection and thus to the respective gas space.

[0030] In a further possible embodiment of the service facility, the respective decentralized sensors of the sensor device and the associated connections are formed in a connecting hose, which allows a particularly simple, reliable and flexible connection of the service facility to the gas spaces, while at the same time making handling easy.

[0031] In a further possible embodiment of the service installation, the respective decentralized sensor and the respective decentralized switching element are arranged at the associated connection or at the associated end of the connecting hose, such that the sensor communicates with the line section between the gas space and the switching element, whereby the gas properties of the gas space can be monitored by the sensor even when the connection is closed by the switching element, thus allowing a continuous monitoring of the gas space by the service installation, which increases the safety of the operation of the installation, and furthermore the state of the gas space can be detected before the switching valve is opened and can be processed, in particular by safety-related functions.

[0032] In a further possible embodiment of the service installation, the switching device comprises at least one central switching element, which is coupled to the connections and configured for opening and closing the connections, such a central switching element reduces material and cost consumption and is easily controllable.

[0033] In a further possible embodiment of the service installation, the at least one central switching element is arranged in a central switch box in the service installation and is therefore particularly easily accessible, for example for maintenance purposes.

[0034] In a further possible embodiment of the service installation, the sensor device is configured as a so-called sensor block, in particular as an accessory part, which can also be retrofitted, for example, to the installation which contains the gas space.

[0035] In a further possible embodiment of the service facility, the sensor device comprises at least one central sensor coupled to the connections for detecting at least one gas property, such a central sensor reduces material and cost consumption and is simple to operate, since only a single sensor is needed for all connections.

[0036] In a further possible embodiment of the service installation, each connection comprises a separate gas inlet and a separate gas outlet, and the pumping device and the gas treatment device are configured to perform a continuous gas treatment process, in which gas is continuously removed from the gas space, the gas is treated and the treated gas is subsequently returned to the gas space. Such a continuous process makes it possible in a simple manner to continuously dry the gas.

[0037] In a further possible embodiment of the service installation, the respective connection is configured as a gas inlet or a gas outlet depending on the pumping direction of the pumping device and the switching state of the switching device. In such an embodiment, gas treatment can be carried out in each gas space with at least one corresponding connection. Furthermore, the gas treatment is separated from the interior of the gas space by the separation by the switching device, which results in a very high process safety.

[0038] In a further possible embodiment of the service facility, the service facility is configured to determine and dynamically set the gas treatment time based on the continuously determined gas property values ​​during the continuous performance of the gas treatment process by the control unit, so that the treatment time can be easily adapted to the corresponding gas property and the use can be further automated.

[0039] In a further possible embodiment of the service installation, the service installation is configured by the control unit to periodically remove gas from the gas space via the connection in a gas treatment process, treat the gas and then return the treated gas to the gas space via the same connection, this cyclical gas treatment being highly effective and isolated from the interior of the gas space by the separation by the switching device, which ensures a very high process safety.

[0040] In a further possible embodiment of the service facility, the service facility is configured by the control unit to determine and dynamically set the number of cycles of gas treatment based on the continuously determined values ​​of the gas properties during the cyclical implementation of the gas treatment process. Thus, the number of cycles and, as a result, the gas treatment time can be easily adapted and controlled to the corresponding gas properties. Furthermore, the determined estimated treatment time can be displayed via a user interface, which allows the user to better plan the usability and availability of the service facility.

[0041] In a further possible embodiment of the service facility, the service facility is configured by the control unit to carry out a gas treatment process for several gas spaces simultaneously, in which case one simultaneous gas treatment can be carried out for several or all gas spaces at the same time.

[0042] In a further possible embodiment of the service facility, the service facility is configured by a control unit to continuously determine at least one gas property of the gas from the gas space during the gas treatment process by means of the sensor device and to provide a graphical visualization of the determined data in a time series display by means of a user interface, the control unit being configured in particular to extrapolate the determined data and to insert the extrapolated data as a predicted progression into the time series display by means of the user interface for graphical visualization, whereby a live graphical display of the time series for the user can be realized.

[0043] In a further possible embodiment of the service facility, the service facility is configured to perform or control the gas treatment processes by the control unit in a cyclical alternating manner in a fixed sequence for the respective gas spaces, such a performance of the gas treatment processes can be realized very simply and reliably.

[0044] In a further possible embodiment of the service facility, the service facility is configured to determine and control by the control unit the sequence and / or frequency of carrying out the gas treatment processes for each gas space based on the actual value of at least one gas property, so that an individual, adapted gas treatment can be carried out for each gas space.

[0045] In a further possible embodiment of the service facility, the service facility is configured to determine and control by the control unit the order and / or frequency of carrying out the gas treatment processes based on the volume of the respective gas space of the gas spaces, in particular, for example, gas treatment in gas spaces with a large volume is carried out more frequently than in gas spaces with a small volume, since in gas spaces with a large volume the gas treatment is generally more laborious or takes longer due to the larger volume.

[0046] In a further possible embodiment of the service facility, the service facility is configured by the control unit to determine and control the order and / or frequency of carrying out the gas treatment processes based on the leak rates of each of the gas spaces, the leak rates having been previously determined by recording the operating pressures of said gas spaces over a test period of, for example, 14 days. In particular, in this case the leak rates can be taken into account when determining the waiting time until the next treatment cycle or also for determining the sequence of the gas spaces for gas treatment, so that treatment can be started more efficiently.

[0047] In a further possible embodiment of the service facility, the service facility is configured to determine and control, by means of the control unit, the order and / or frequency of carrying out the gas treatment processes based on preselected priorities, so that a higher priority can be given to the gas spaces which perform the most important gas treatments, for example based on their frequency of use.

[0048] In a further possible embodiment of the service facility, the service facility is configured to carry out a gas treatment process by means of the control unit until at least one gas property reaches a predefined target value, after which the gas treatment process for the further gas space is carried out. In this case, the gas property comprises gas humidity, concentration of decomposition products and / or gas purity. This gas property is detected in particular by a sensor device, for example by a sensor formed on or directly in a connection at the end of the connecting hose. Thus, the gas treatment can be carried out in a particularly simple and reliable automated manner.

[0049] In a further possible embodiment of the service facility, the service facility is configured by means of the control unit to prematurely interrupt the gas treatment process in one gas space if limit values ​​are exceeded in another gas space and to start emergency gas treatment in said other gas space, so that gas treatment can be carried out before the limit values ​​are exceeded by a predefined amount, based on the requirements in the respective gas space.

[0050] In a further possible embodiment of the service facility, the control unit is configured to observe a predefined waiting time from a previously performed gas treatment process in a gas space before a gas treatment process is performed in the same gas space, so that a thorough mixing of the gas in the gas space is achieved and a gas volume containing a large part of the gas just previously treated is avoided from being sucked back in and treated again, thus achieving a uniform and effective treatment of the gas.

[0051] In further possible embodiments of the service facility, the control unit is configured to set the waiting time based on the volume of the gas space, whereby the waiting time increases as the volume increases, or based on the filling state of at least one filter of the gas treatment device, or based on the leakage rate of the gas space, whereby the leakage rate has been previously determined by recording the operating pressure of said gas space over a test period, thereby allowing the waiting time to be precisely adapted to the parameters of the gas space and / or the gas treatment device.

[0052] In a further possible embodiment of the service facility, the service facility is configured for setting the waiting time by means of the control unit based on the gas properties of the gas present inside the gas space, which allows the waiting time to be precisely adapted to the gas properties of the gas present inside the gas space.

[0053] In a further possible embodiment of the service facility, the service facility is configured by the control unit to carry out the gas treatment process for the further gas space during the waiting time to be observed of the preceding gas space, so that the waiting time can be utilized to carry out the gas treatment for the further gas space as early as possible, which makes it possible to avoid dead or idle times and to carry out the gas treatment of several gas spaces particularly quickly and efficiently.

[0054] In a further possible embodiment of the service facility, the service facility is configured to increase the gas pressure inside the gas space to a value above the standard operating pressure before the gas treatment process is carried out by the control unit. This makes it possible to remove a larger gas volume from the gas space for gas treatment without the gas pressure inside the gas space falling below a predetermined minimum target value. Thus, the operability of the gas space, in particular of the electrical operating means arranged inside the gas space, for example circuit breakers, is guaranteed even during gas treatment, while at the same time larger gas volumes can be treated.

[0055] In a further possible embodiment of the service facility, the service facility is configured to determine and control by the control unit the gas volume of treated gas returned to the respective gas space when the gas treatment process is carried out, such that the gas pressure in the gas space after said gas volume has been completely returned corresponds to the standard operating pressure, thereby optimizing the operability of the gas space, in particular of the electrical operating means arranged inside the gas space.

[0056] In a further possible embodiment of the service facility, the service facility is configured to determine and control, by means of the control unit, the gas volume removed from the respective gas space when the gas treatment process is carried out, such that the gas pressure inside the gas space after the gas volume has been completely removed is above a defined minimum target value, again ensuring the operability of the gas spaces, in particular of the electrical operating means arranged inside the gas spaces.

[0057] In a further possible embodiment of the service facility, the service facility comprises an internal sensor device for monitoring at least one gas property of the gas in the gas treatment device, a recycle unit for exchanging, e.g. purifying, the gas from the gas treatment device and a pumping device for pumping the gas from the gas treatment device to the recycle unit or vice versa, thereby enabling the service facility to carry out subsequent gas treatment processes and to improve the safety and functionality of the application of the gas treatment processes.

[0058] The pumping device may be the same device which is also configured to pump gas between the gas space and the gas treatment device. This allows a particularly compact construction to be achieved. However, the service installation can also comprise a second pumping device for this purpose, so that the gas pumping between the relevant gas space and the gas treatment device on the one hand and the gas pumping between the gas treatment device and the recycling unit on the other hand are each performed by different pumping devices. In particular, the second pumping device and the recycling unit can be accommodated in a separate module or separate installation which is fluidly connected to the service installation. This allows a simpler construction to be achieved and the service installation can be built in a modular manner.

[0059] In a further possible embodiment of the service facility, the control unit has or can store limit values ​​for at least one gas property of the gas in the gas treatment device. The service facility can be configured by the control unit to monitor and identify by means of an internal sensor device that the gas property of the gas in the gas treatment device exceeds this limit value during the gas treatment process. If an exceedance is detected, the service facility can be configured by the control unit to terminate the gas treatment process and then to empty, in particular to vent, the gas treatment device by means of a pumping device. The gas from the gas treatment device can then be repurified in the recycle unit or stored in a storage tank of the recycle unit. Finally, the service facility can be configured by the control unit to refill the gas treatment device with repurified gas from the recycle unit or with pure gas from a pure gas reservoir of the recycle unit before the next gas treatment process is started. This can improve the safe operation of the service facility and allows the service facility to carry out the gas treatment in a sustainable and effective manner. For example, if limit values ​​are exceeded and the safety and effectiveness of the gas treatment is at risk, the service facility can be configured to automatically perform a complete exchange of the gas remaining in the device, thereby re-establishing an initial state, so that the safety and effectiveness of the gas treatment is not at risk.

[0060] A pure gas is understood in this context in particular to be a gas which does not exceed the limiting values ​​of certain gas properties. However, this pure gas may well be a mixture of gases, i.e. pure does not necessarily mean that only one gas species is present. Which gas properties are relevant and which limiting values ​​are given depend on the particular application.

[0061] In a further possible embodiment of the service facility, the recycle unit comprises a particle or chemical filter or a compression unit for compressing and liquefying at least one component of the gas to separate at least one liquid phase and at least one gas phase. The recycle unit can therefore be particularly effective in repurifying the gas from the gas processing device and removing undesirable impurities from the system.

[0062] In a further possible embodiment of the service facility, the internal sensor device is configured to monitor the concentration of decomposition products in the gas in the gas treatment device, where the limit value relates to the maximum permissible concentration of the decomposition products. In the case of applications with sulfur hexafluoride (SF6) as protective gas, the concentration of the decomposition products can be, for example, the volume percentage of air and / or tetrafluoromethane (CF4) in the volume of protective gas. According to IEC 60480, the limit value for such impurities is, for example, 3 volume percent. In this embodiment, the service facility can also be particularly advantageously used to gradually reduce the concentration of the decomposition products present in the gas space. In the respective gas treatment process, the gas from the gas space is thoroughly mixed with the gas held in the gas treatment device. In the case of thorough mixing, the concentration of the decomposition products decreases, since the gas held in the gas treatment device initially has a lower concentration than the gas from the gas space. The residual concentration of decomposition products, concentrated in the gas treatment device after one or more gas treatment processes, can be automatically reduced at specific intervals by means of the pumping device and the recycling unit, i.e. removed from the system. The service facility is thus suitable, for example, for carrying out simultaneous drying and repurification of the protective gas from the gas space, while the operating means can be present in the gas space during operation.

[0063] In a further possible embodiment of the service facility, the control unit stores or can store setpoint values ​​and / or permissible deviations from the setpoint values ​​for each gas property and each gas space, so that the control of the gas treatment device can be further improved and automated based on at least one gas property.

[0064] In a further possible embodiment of the service facility, the control unit is coupled or can be coupled to a storage device and is configured to read out the respective setpoint values ​​and / or tolerable deviations from the setpoint values ​​from the storage device and associate them with the associated gas space. In the same way, the control unit can also be configured to store in the storage device the setpoint values ​​and / or tolerable deviations from the setpoint values ​​of the gas properties for the gas spaces stored in the control unit.

[0065] In further possible embodiments of the service facility, the control unit is configured for initially detecting the respective gas properties in the gas space by means of the sensor device and saving them as target values ​​in order to determine the target values, and / or the control unit is coupled to or comprises an input device, which is configured for manually inputting the respective target values ​​and / or is configured as a wirelessly connected mobile terminal. By initially detecting the gas properties in order to determine the target values, a particularly accurate and adapted determination of the target values ​​can be performed. Manual input of the respective target values ​​is characterized by being particularly simple and particularly reliable.

[0066] In a further possible embodiment of the service facility, the gas treatment device comprises a drying unit configured to dry the gas by cooling and condensing the water vapor, this embodiment also allows reliable drying of the gas and is characterized by low maintenance and operating costs.

[0067] In a further possible embodiment of the service installation, the pumping device is configured for pumping sulfur hexafluoride, nitrogen, carbon dioxide, air, fluoronitriles, fluoroketones and / or mixtures of at least two of the aforementioned gases as gases, and the gas treatment device is configured for treating sulfur hexafluoride, nitrogen, carbon dioxide, air, fluoronitriles, fluoroketones and / or mixtures of at least two of the aforementioned gases as gases. The service installation is therefore particularly suitable for gas treatment in electrical switchgear, in which protective gases are used.

[0068] In a further possible embodiment of the service installation, the service installation is configured for treating gas stored under overpressure in a gas space, and is therefore particularly suitable for gas treatment in electrical switchgear, in which gas is stored under overpressure inside the gas space.

[0069] In the following, an embodiment of the invention will be explained in more detail on the basis of the drawings. [Brief description of the drawings]

[0070] [Figure 1] FIG. 2 is a schematic diagram showing a number of gas spaces and service facilities for these gas spaces; [Diagram 2] FIG. 2 is a schematic diagram showing a number of gas spaces and service facilities for these gas spaces; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0071] In all the drawings, corresponding parts are provided with the same reference symbols.

[0072] FIG. 1 shows diagrammatically one possible embodiment of a plurality of gas spaces 2.1 to 2.n and a service installation 1 for these gas spaces 2.1 to 2.n.

[0073] The gas spaces 2.1-2.n are, for example, components of an electrical switchgear and each form a repository for a gas-insulated electrical operating means 24, such as, for example, an electrical circuit breaker. The gas spaces 2.1-2.n are filled with insulating and extinguishing gases as protective gases, for example sulfur hexafluoride, abbreviated as SF6, nitrogen, carbon dioxide, air, fluoronitriles, fluoroketones and / or mixtures of at least two of the aforementioned gases, which are filled in the corresponding gas spaces 2.1-2.n under a defined minimum pressure, for example an overpressure of 6 bar, and which extinguish arcs that occur between the electrical contacts when they are opened. In this case, the safe functioning depends, in particular, on the purity of the protective gas and on the fact that the gas is filled at a pressure that is not below a defined minimum pressure and not above a defined maximum pressure, in particular under a defined rated or operating pressure.

[0074] To ensure this purity, the service facility 1 comprises a gas treatment device 3 configured to perform purification and / or drying and / or temperature conditioning of the gas. Furthermore, the service facility 1 comprises at least one control unit 22 for monitoring and controlling at least some of the components of the facility.

[0075] The gas treatment device 3 is connected to the gas space 2.1 via a first gas line 4 and to a gas cylinder 6 via a second gas line 5, the first gas line 4 comprising a connection 7.1 for connection to the gas spaces 2.1-2.n. The first gas line 4 can in particular be configured as a connecting hose, which is arranged as a link between the connection 7.1 to the gas space 2.1 and the connection 7.0 to the service installation 1.

[0076] The gas treatment device 3 comprises a pumping device 8 for pumping gas from the gas space 2.1 to the gas treatment device 3 and for at least indirectly returning it to the gas space 2.1 from the gas treatment device 3. The pumping device 8 is, for example, configured as a compressor.

[0077] Furthermore, the gas treatment device 3 comprises a drying unit having a number of drying filters 9-11 and / or particle filters for absorbing moisture from the gas. The drying filters 10 and 11 can be used alternately, so that while one drying filter 10, 11 is being used, at least one remaining drying filter 11, 10 can be dried in a manner not shown in detail, for example by supplying it with warm air.

[0078] The gas treatment device 3 comprises at least a pair of humidity sensors 23.1, 23.2, the first humidity sensor 23.1 being at least indirectly, for example directly, coupled to the input of the corresponding drying filter 9-11, respectively, and the second humidity sensor 23.2 being at least indirectly, for example directly, coupled to the output of the corresponding drying filter 9-11, respectively. The humidity sensors 23.1, 23.2 are coupled to an evaluation unit, which determines from the humidity values ​​determined by the humidity sensors 23.1, 23.2 the filling state of the drying filters 9-11 and from this filling state the required residence time of the gas in the drying filters 9-11 and / or the time and duration for drying the drying filters 9-11.

[0079] Alternatively or in addition to using drying filters 9-11, drying units are provided which are arranged to perform drying of the gas by cooling and condensing the liquid components of the drying filters 9-11.

[0080] Furthermore, the gas treatment device 3 includes a plurality of switching valves and / or pressure control valves 25. These switching valves and / or pressure control valves 25 are arranged so as to enable the above-mentioned application of the drying filters 9-11 and bidirectional pumping of gas by the pumping device 8 in the direction from the gas space 2.1 towards the gas treatment device 3 and in the direction from the gas treatment device 3 back to the gas space 2.1. For this purpose, the connection 7.1 is configured as a gas inlet or a gas outlet depending on the pumping direction.

[0081] In order to purify, in particular dry, the gas present in the gas space 2.1, a portion of this gas present in the gas space 2.1, in particular with an overpressure, is pumped by the pumping device 8 to the gas treatment device 3 and stored in a gas storage tank 12.

[0082] In order to further ensure the operation of the high-voltage operating means present in the gas space 2.1, the gas volume removed from the gas space 2.1 in this case is selected such that the gas pressure inside the gas space 2.1 exceeds a predetermined minimum target value, in particular a predetermined minimum pressure, after the gas volume is removed.

[0083] In one possible embodiment, the service installation 1 comprises a sensor arrangement with sensors 26.0, 26.1 for monitoring at least one gas property. For example, the sensor 26.1 can be associated with the connection 7.1. A further sensor 26.0 or a number of further sensors can be arranged inside the service installation 1. With the sensors 26.0, 26.1 of the sensor arrangement, the service installation can monitor the state of the gas space 2.1 and identify dangerous states at an early stage. This also makes it possible to utilize the service installation while the electrical operating means 24 accommodated in the gas space 2.1 are in operation.

[0084] In one possible embodiment, the control unit 22 first determines two operating points from a minimum pressure of the gas, a rated pressure of the gas, and a maximum pressure of the gas, the first operating point being between the minimum pressure and the rated pressure, and the second operating point being between the rated pressure and the maximum pressure.

[0085] In order to increase the amount of gas that can be processed in one cycle, in one possible embodiment, before gas is removed from the gas space 2.1, the gas pressure inside the gas space 2.1 is increased to a value (e.g. a specified second operating point) that is above the rated pressure, in particular the standard operating pressure, but below the maximum pressure, and the gas volume to be removed is then selected such that the pressure inside the gas space 2.1 after the gas volume has been removed is above the minimum pressure (e.g. at the determined first operating point). The initial increase in gas pressure is performed, for example, based on the gas stored in the gas cylinder 6 or based on the gas already stored in the gas storage tank 12.

[0086] In one possible embodiment of the service installation 1, the latter is configured to determine the internal volume of the gas space 2.1 on the basis of the volume of the connecting hose with which the connection 7.1 is formed, the volume of the line between the connection 7.0 of the service installation 1 and the gas treatment device 3, and the volume of the gas storage tank 12. For this purpose, firstly a defined initial state is established inside said known volumes, for example by evacuating said volumes, or a current initial state is determined by means of a sensor 26.0 inside the service installation 1. Subsequently, when gas is removed from the gas space 2.1, the gas line 4, which in one possible embodiment is configured as a connecting hose, the line between the connection 7.0 and the gas treatment device 3, and the gas storage tank 12 are filled step by step with this gas. At the same time, the gas pressure inside the gas space 2.1 is monitored by the sensor 26.1 in order to identify and avoid the risk of falling below the minimum pressure at an early stage. At the same time, the pressure drop during the stepwise filling of the gas line 4 configured as a connecting hose, the line and the gas storage tank 12 can be used to determine the internal volume of the gas space 2.1, if the other volumes are known.

[0087] The extracted gas is then guided by the pumping device 8 through the drying filters 10, 11 one or more times until a target value of the gas property is reached based on at least one previously initially determined gas property, e.g. humidity. That is to say, the service installation 1 is configured to determine and set by the control unit 22 the number of cycles of gas treatment during the cyclical performance of the gas treatment process based on the initially determined values ​​of the gas property.

[0088] To determine the at least one gas property, the service installation 1 comprises a sensor arrangement, not shown in detail, which comprises at least one central sensor 26.0 for detecting the at least one gas property. It is also possible for the sensor arrangement to comprise several sensors 26.0, 26.1 for detecting the at least one gas property or several gas properties. The at least one sensor 26.1 can be formed together with the associated connection 7.1 in the gas line 4 configured as a connecting hose.

[0089] The sensor device is configured to detect gas pressure and / or gas density and / or gas temperature and / or gas humidity and / or concentration of decomposition products in the gas as gas properties, and gas processing is performed based on one or more of these gas properties.

[0090] For this purpose, in one possible embodiment of the service facility 1, for each gas characteristic and each gas space 2.1 to 2.n, target values ​​and / or permissible deviations from the target values ​​are stored or can be stored in the control unit 22.

[0091] In one possible embodiment, the control unit 22 is configured to initially detect the respective gas properties in the gas spaces 2.1-2.n by means of a sensor device and store them as target values ​​in order to determine the target values. Alternatively or additionally, the control unit 22 is coupled to or includes an input device for manually inputting the respective target values.

[0092] The control unit 22 can be coupled to a memory device or can be coupled to the memory device. The control unit 22 can be configured to read out the respective target values ​​and / or the allowable deviations from the target values ​​from the memory device and to associate them with the associated gas spaces 2.1-2.n.

[0093] Furthermore, the sensor device or control unit 22 may be data-technically or electrically connected or connectable to at least one gas space sensor 14.1-14.n for detecting at least one gas characteristic, which at least one gas space sensor 14.1-14.n is arranged in or adjacent to the gas space 2.1-2.n and is a component part of an installation which encompasses the respective gas space 2.1-2.n, said connection being effected via a switchboard 13 of said installation.

[0094] The switchboard 13 can in particular be coupled to one or more gas space sensors 14.1-14.n and can centrally monitor the one or more gas space sensors 14.1-14.n. The gas space sensors 14.1-14.n can in particular be configured as gas density monitors which output a switching signal in the event of an exceedance or fall below a predefined limit value, which switching signal can be used, for example, for an emergency shutdown of the entire installation.

[0095] Furthermore, the control unit 22 may be coupled or coupleable to at least one gas space monitoring unit 15 coupled to the installation's switchboard 13 or to a gas space sensor 14.1 arranged in or adjacent to the gas space 2.1, the gas space monitoring unit 15 being configured to shut down the service installation 1 if a dangerous state of the gas space 2.1 is signalled by the switchboard 13 or the gas space sensor 14.1. The dangerous state can be determined, for example, by a pressure drop below a permitted minimum pressure or by exceeding or falling below other limiting values ​​of the gas properties.

[0096] After the gas has been treated, the treated gas can be returned to the gas space 2.1 via the same gas line 4 or another gas line 16, the gas volume of the treated gas returned to the gas space 2.1 being selected, for example, such that the gas pressure in the gas space 2.1 after the gas volume has been completely returned corresponds to the standard operating pressure.

[0097] That is, in one possible embodiment, the service facility 1 can be configured to control the pumping device 8 and the gas treatment device 3 via the control unit 22 so that, during the gas treatment process, gas is periodically removed from the gas space 2.1 via the connection 7.1, the gas is treated, and the treated gas is subsequently returned to the gas space 2.1 via the same connection 7.1.

[0098] In order to allow uniform processing of the gas and to avoid that the gas just processed is immediately pumped again to the gas processing device 3 and processed, a predefined waiting time is observed from the previously performed gas processing process in the same gas space 2.1 before a new gas processing process is performed in this gas space 2.1. The waiting time is set, for example, by the control unit 22, based on the volume of the gas space 2.1, the waiting time increasing as the volume increases. In an alternative embodiment, the waiting time is set based on the filling state of at least one filter, for example the drying filter 9-11, of the gas processing device 3. In an alternative embodiment, the waiting time is set based on the leakage rate of the gas space 2.1, the leakage rate being determined in advance by recording the operating pressure of the gas space 2.1 over a test period, for example over 14 days.

[0099] For data exchange with at least one external data processing unit 17 and with terminals 18 , 19 coupled to this external data processing unit 17 , the service facility 1 comprises at least one corresponding communication interface 20 .

[0100] In FIG. 2 a further possible embodiment of a plurality of gas spaces 2.1-2.n and a service installation 1 for these gas spaces 2.1-2.n is shown diagrammatically.

[0101] Different from the embodiment shown in FIG. 1, the service installation 1 comprises a plurality of connections 7.1-7.n coupled to the gas treatment device 3 and to at least one sensor device, each of the connections 7.1-7.n being configured for coupling to at least one gas space 2.1-2.n, respectively.

[0102] Furthermore, the service installation 1 comprises a switching device 21 for switching at least one, in the illustrated embodiment several, distributed switching elements 21.1 to 21.n for opening and closing the connections 7.1 to 7.n, or alternatively one central switching element may be provided.

[0103] The switching device 21 is connected in terms of control technology to a control unit 22, which is arranged to automatically activate the switching elements 21.1 to 21.n.

[0104] The decentralized switching elements 21.1-21.n are respectively connected to the connections 7.1-7.n and are adapted to open and close the corresponding connections 7.1-7.n. The decentralized switching elements 21.1-21.n are, for example, arranged directly on the respective associated connections 7.1-7.n or formed together with the associated connections 7.1-7.n in or at the end of a connecting hose.

[0105] In one possible embodiment, the decentralized sensors 26.1-26.n of the sensor device are also arranged directly on the respective associated connection parts 7.1-7.n, for example formed in the connecting hose or at the end of the connecting hose together with the associated connection parts 7.1-7.n and the associated switching elements 21.1-21.n.

[0106] 1, the gas treatment is carried out for each individual gas space 2.1-2.n, which are in particular permanently connected, i.e. at least for the duration of the treatment, to the service installation 1 at the same time. This connection can in particular be carried out via a number of connecting hoses, at least one connecting hose being used per gas space 2.1-2.n. For the connection of these connecting hoses, the service installation 1 can be provided with a number of connections 7.0.

[0107] Unlike the embodiment shown in FIG. 1, the service facility 1 is additionally configured such that the control unit 22 controls the pumping device 8, the switching device 21 and the gas treatment device 3 in such a way that the gas treatment processes are carried out cyclically and alternately in a defined sequence for each gas space 2.1 to 2.n.

[0108] By means of the control unit 22, the order and / or frequency of carrying out the gas treatment processes can be defined and controlled for each gas space 2.1-2.n on the basis of the actual value of at least one gas property. Alternatively or additionally, the order and / or frequency of carrying out the gas treatment processes is controlled on the basis of the gas space volume of each of the gas spaces 2.1-2.n.

[0109] Alternatively or additionally, the order and / or frequency of carrying out the gas treatment processes is further controlled based on the leak rates of each of the gas spaces 2.1-2.n and / or based on preselected priorities.

[0110] Furthermore, the gas treatment is carried out, in particular until at least one gas property reaches a predefined target value, after which a gas treatment process for further gas spaces 2.1-2.n can be carried out.

[0111] For example, the gas treatment process for the further gas spaces 2.1-2.n is carried out during the waiting time to be observed of the preceding gas spaces 2.1-2.n. [Explanation of symbols]

[0112] 1 Service facilities 2.1~2n Gas space 3 Gas treatment equipment 4 Gas Pipeline 5 Gas Pipeline 6. Gas Cylinder 7.0~7.n Connection 8. Pressure feeding device 9~11 Drying filter 12 Gas storage tank 13 Switchboard 14.1~14.n Gas space sensor 15 Gas Space Monitoring Unit 16 Gas Pipeline 17 Data Processing Unit 18 Terminals 19 Terminals 20 Communication Interface 21 Switching Device 21.1~21.n Switching elements 22 Control Unit 23.1~23.2 Humidity sensor 24 Electrical operating means 25 Switching valve and / or pressure control valve 26.0~26.n Sensor

Claims

1. A service installation (1) for a gas space (2.1 to 2.n), comprising: the service installation (1) comprises a gas treatment device (3) for treating the gas present in at least one gas space (2.1 to 2.n), said gas treatment device (3) being configured to carry out purification and / or drying and / or temperature conditioning of said gas, the service installation (1) comprises at least one sensor device for monitoring at least one gas property of said gas, said sensor device being configured to detect as said gas property the gas pressure and / or the gas density and / or the gas temperature and / or the gas humidity and / or the concentration of decomposition products in said gas, the service installation (1) has at least one connection (7.1-7.n) connected to the gas treatment device (3) and to the at least one sensor device, the at least one connection (7.1-7.n) being configured for connection to the gas space (2.1-2.n), the service installation (1) comprises at least one pumping device (8) for pumping gas from the gas spaces (2.1 to 2.n) to the gas treatment device (3) and for at least indirectly returning the gas from the gas treatment device (3) to the gas spaces (2.1 to 2.n), the service installation (1) comprises at least one control unit (22) which is connected to at least the sensor device and which monitors and controls at least the pumping device (8) and / or the gas treatment device (3), the control unit (22) is configured to carry out the gas treatment processes cyclically alternating in a fixed sequence for each gas space (2.1 to 2.n); and / or The service facility (1) determines, by means of the control unit (22), the order and / or frequency of carrying out the gas treatment processes, for each gas space (2.1 to 2.n) based on the actual value of at least one gas property, or based on the volume of each of the gas spaces (2.1 to 2.n), or based on the leak rate of each of said gas spaces (2.1-2.n), said leak rate having been previously determined by recording the operating pressure of said gas spaces (2.1-2.n) over a test period, or Based on pre-selected priorities, configured to determine and control and / or the service facility (1) is configured by the control unit (22) to carry out the gas treatment process until at least one gas property reaches a predefined target value and to carry out a gas treatment process for further gas spaces (2.1-2.n) after the target value is reached, the gas property comprising gas humidity, concentration of decomposition products and / or gas purity, and / or the service installation (1) is configured by means of the control unit (22) to prematurely interrupt the gas treatment process in one gas space (2.1-2.n) if limit values ​​are exceeded in the other gas spaces (2.1-2.n) and to start emergency gas treatment in the other gas spaces (2.1-2.n), Service facilities (1).

2. A service installation (1) for a gas space (2.1 to 2.n), comprising: the service installation (1) comprises a gas treatment device (3) for treating the gas present in at least one gas space (2.1 to 2.n), said gas treatment device (3) being configured to carry out purification and / or drying and / or temperature conditioning of said gas, the service installation (1) comprises at least one sensor device for monitoring at least one gas property of said gas, said sensor device being configured to detect as said gas property the gas pressure and / or the gas density and / or the gas temperature and / or the gas humidity and / or the concentration of decomposition products in said gas, the service installation (1) has at least one connection (7.1-7.n) connected to the gas treatment device (3) and to the at least one sensor device, the at least one connection (7.1-7.n) being configured for connection to the gas space (2.1-2.n), the service installation (1) comprises at least one pumping device (8) for pumping gas from the gas spaces (2.1 to 2.n) to the gas treatment device (3) and for at least indirectly returning the gas from the gas treatment device (3) to the gas spaces (2.1 to 2.n), the service installation (1) comprises at least one control unit (22) which is connected to at least the sensor device and which monitors and controls at least the pumping device (8) and / or the gas treatment device (3), The service facility (1) determines by the control unit (22) the gas volumes in the connected gas spaces (2.1 to 2.n) as on the basis of the volume of the pipeline between the connections (7.1 to 7.n) and the gas treatment device (3), and / or on the basis of the volume of the connection hose (4) on which the connections (7.1 to 7.n) are formed, and / or Based on the volume of the gas storage tank (12) of the gas processing device (3), It is configured to identify The service facility (1) further comprises: filling the connecting hose, the pipeline between the connection (7.1-7.n) and the gas treatment device (3) and the gas storage tank (12) step by step with the gas when removing the gas from the gas spaces (2.1-2.n), while simultaneously monitoring the gas pressure inside the gas spaces (2.1-2.n); Or, filling the gas spaces (2.1 to 2.n) with the extracted gas when extracting the gas from the connecting hoses, the lines between the connections (7.1 to 7.n) and the gas treatment device (3) and the gas storage tank (12) and at the same time monitoring the gas pressure inside the gas spaces (2.1 to 2.n), determining the gas volume in said gas space (2.1-2.n) based on pressure changes determined when monitoring the gas pressure inside said gas space (2.1-2.n); It is configured as follows: Service facilities (1).

3. A service installation (1) for a gas space (2.1 to 2.n), comprising: the service installation (1) comprises a gas treatment device (3) for treating the gas present in at least one gas space (2.1 to 2.n), said gas treatment device (3) being configured to carry out purification and / or drying and / or temperature conditioning of said gas, the service installation (1) comprises at least one sensor device for monitoring at least one gas property of said gas, said sensor device being configured to detect as said gas property the gas pressure and / or the gas density and / or the gas temperature and / or the gas humidity and / or the concentration of decomposition products in said gas, the service installation (1) has at least one connection (7.1-7.n) connected to the gas treatment device (3) and to the at least one sensor device, the at least one connection (7.1-7.n) being configured for connection to the gas space (2.1-2.n), the service installation (1) comprises at least one pumping device (8) for pumping gas from the gas spaces (2.1 to 2.n) to the gas treatment device (3) and for at least indirectly returning the gas from the gas treatment device (3) to the gas spaces (2.1 to 2.n), the service installation (1) comprises at least one control unit (22) which is connected to at least the sensor device and which monitors and controls at least the pumping device (8) and / or the gas treatment device (3), The service facility (1) is controlled by the control unit (22): determining a lower first operating point and an upper second operating point from a minimum pressure of the gas, a rated pressure of the gas, and a maximum pressure of the gas; automatically starting the gas treatment process by introducing fresh gas into the gas spaces (2.1-2.n) when the rated pressure is closer to the lower first operating point than to the upper second operating point, until the upper second operating point is reached; automatically starting the gas treatment process by withdrawing gas from the gas spaces (2.1-2.n) when the rated pressure is closer to the upper second operating point than to the lower first operating point, until the lower first operating point is reached; and / or When carrying out the gas treatment process, the gas volume removed from each of the gas spaces (2.1 to 2.n) is selected such that the gas pressure inside said gas space (2.1 to 2.n) after removal of said gas volume is above said minimum pressure. It is structured as follows: The service facility (1) is configured to determine, by means of the control unit (22), whether the gas treatment process is operable based on the operating point, and for this purpose the service facility (1) comprises: if the lower first operating point is greater than the rated pressure, the gas treatment process can be started only if a user confirms that the lower first operating point is to be treated as equivalent to the rated pressure; if the upper second operating point is less than the rated pressure, the gas treatment process can be started only if a user confirms that the upper second operating point is to be treated as equivalent to the rated pressure; interrupting the gassing process if both operating points are at the same value or if the upper second operating point is less than the lower first operating point; Service facilities (1).

4. A service installation (1) for a gas space (2.1 to 2.n), comprising: the service installation (1) comprises a gas treatment device (3) for treating the gas present in at least one gas space (2.1 to 2.n), said gas treatment device (3) being configured to carry out purification and / or drying and / or temperature conditioning of said gas, the service installation (1) comprises at least one sensor device for monitoring at least one gas property of said gas, said sensor device being configured to detect as said gas property the gas pressure and / or the gas density and / or the gas temperature and / or the gas humidity and / or the concentration of decomposition products in said gas, the service installation (1) has at least one connection (7.1-7.n) connected to the gas treatment device (3) and to the at least one sensor device, the at least one connection (7.1-7.n) being configured for connection to the gas space (2.1-2.n), the service installation (1) comprises at least one pumping device (8) for pumping gas from the gas spaces (2.1 to 2.n) to the gas treatment device (3) and for at least indirectly returning the gas from the gas treatment device (3) to the gas spaces (2.1 to 2.n), the service installation (1) comprises at least one control unit (22) which is connected to at least the sensor device and which monitors and controls at least the pumping device (8) and / or the gas treatment device (3), the gas treatment device (3) comprises at least one dry filter (9-11) for absorbing moisture, and / or the gas treatment device (3) comprises at least two humidity sensors (23.1-23.2); a first humidity sensor (23.1) is at least indirectly coupled to an input of said at least one drying filter (9-11); a second humidity sensor (23.2) is at least indirectly coupled to the output of said at least one drying filter (9-11); the humidity sensors (23.1-23.2) are coupled to at least the control unit (22), which determines the filling state of the at least one drying filter (9-11) from the humidity values ​​determined by the humidity sensors (23.1-23.2); Service facilities (1).

5. A service installation (1) for a gas space (2.1 to 2.n), comprising: the service installation (1) comprises a gas treatment device (3) for treating the gas present in at least one gas space (2.1 to 2.n), said gas treatment device (3) being configured to carry out purification and / or drying and / or temperature conditioning of said gas, the service installation (1) comprises at least one sensor device for monitoring at least one gas property of said gas, said sensor device being configured to detect as said gas property the gas pressure and / or the gas density and / or the gas temperature and / or the gas humidity and / or the concentration of decomposition products in said gas, the service installation (1) has at least one connection (7.1-7.n) connected to the gas treatment device (3) and to the at least one sensor device, the at least one connection (7.1-7.n) being configured for connection to the gas space (2.1-2.n), the service installation (1) comprises at least one pumping device (8) for pumping gas from the gas spaces (2.1 to 2.n) to the gas treatment device (3) and for at least indirectly returning the gas from the gas treatment device (3) to the gas spaces (2.1 to 2.n), the service installation (1) comprises at least one control unit (22) which is connected to at least the sensor device and which monitors and controls at least the pumping device (8) and / or the gas treatment device (3), the sensor device or the control unit (22) is or can be coupled in a data-technical or electrical manner to at least one gas space sensor (14.1-14.n) for detecting at least one gas property, the at least one gas space sensor (14.1-14.n) being arranged in or adjacent to the gas space (2.1-2.n) and being a component part of an installation which encompasses the respective gas space (2.1-2.n), the coupling being effected in particular via a switchboard (13) of the installation, and / or the control unit (22) is coupled or can be coupled to at least one gas space monitoring unit (15), the gas space monitoring unit (15) being coupled to a switchboard (13) of the installation or to gas space sensors (14.1-14.n) arranged in or adjacent to the gas spaces (2.1-2.n), the gas space monitoring unit (15) being configured to shut down the service installation (1) if a dangerous state in the gas spaces (2.1-2.n) is signalled by the switchboard (13) or by the gas space sensors (14.1-14.n), Service facilities (1).

6. the service installation (1) comprises at least two connections (7.1 to 7.n) connected to the gas treatment device (3) and to the at least one sensor device, each connection (7.1 to 7.n) being configured for connection to at least one gas space (2.1 to 2.n), the service installation (1) comprises a switching device (21) for switching at least one switching element (21.1 to 21.n) for opening and closing said connections (7.1 to 7.n), said switching device (21) being connected to said control unit (22), said control unit (22) being configured to automatically drive said at least one switching element (21.1 to 21.n), A service facility (1) according to any one of claims 2 to 5.

7. The switching device (21) includes a plurality of distributed switching elements (21.1 to 21.n), and the plurality of distributed switching elements (21.1 to 21.n) include - respectively coupled to a connection (7.1-7.n) and configured to open and close the corresponding connection (7.1-7.n); and / or - arranged directly on each associated connection (7.1 to 7.n); and / or - each with its associated connection (7.1 to 7.n) is formed in a connecting hose, A service facility (1) according to claim 6.

8. The sensor device includes a plurality of distributed sensors (26.0-26.n) for detecting the at least one gas characteristic, the plurality of distributed sensors (26.0-26.n) comprising: - respectively coupled to the connections (7.1 to 7.n) and / or at each connection (7.1 to 7.n), at least one of the gas pressure and / or the gas density is detected as said gas property; and / or - arranged directly on each associated connection (7.1 to 7.n); and / or - each with its associated connection (7.1 to 7.n) is formed in a connecting hose, A service facility (1) according to any one of claims 2 to 7.

9. A service installation (1) for a gas space (2.1 to 2.n), comprising: the service installation (1) comprises a gas treatment device (3) for treating the gas present in at least one gas space (2.1 to 2.n), said gas treatment device (3) being configured to carry out purification and / or drying and / or temperature conditioning of said gas, the service installation (1) comprises at least one sensor device for monitoring at least one gas property of said gas, said sensor device being configured to detect as said gas property the gas pressure and / or the gas density and / or the gas temperature and / or the gas humidity and / or the concentration of decomposition products in said gas, the service installation (1) has at least one connection (7.1-7.n) connected to the gas treatment device (3) and to the at least one sensor device, the at least one connection (7.1-7.n) being configured for connection to the gas space (2.1-2.n), the service installation (1) comprises at least one pumping device (8) for pumping gas from the gas spaces (2.1 to 2.n) to the gas treatment device (3) and for at least indirectly returning the gas from the gas treatment device (3) to the gas spaces (2.1 to 2.n), the service installation (1) comprises at least one control unit (22) which is connected to at least the sensor device and which monitors and controls at least the pumping device (8) and / or the gas treatment device (3), each connection (7.1-7.n) comprises a separate gas inlet and a separate gas outlet, the pumping device (8) and the gas treatment device (3) are configured for continuously carrying out a gas treatment process, in which gas is continuously taken from the gas spaces (2.1-2.n), the gas is treated and the treated gas is returned to the gas spaces (2.1-2.n), the service installation (1) being configured in particular by the control unit (22) to determine and dynamically set a treatment time for the gas on the basis of values ​​of the gas properties determined continuously during the continuous carrying out of the gas treatment process, and / or the service installation (1) is configured by means of the control unit (22) in the gas treatment process to cyclically withdraw gas from the gas spaces (2.1-2.n) via the connections (7.1-7.n), treat said gas and subsequently return said treated gas to said gas spaces (2.1-2.n) via the same connections (7.1-7.n), the control unit (22) being configured in particular to determine and to dynamically set on the basis of values ​​of gas properties determined continuously during the cyclical implementation of the gas treatment process the number of cycles of treatment of said gas, and / or the service installation (1) is configured by the control unit (22) to continuously determine, by means of the sensor device, at least one gas property of the gas from the gas spaces (2.1-2.n) during the gas treatment process and to provide a graphical visualization of the determined data in a time series display by means of a user interface, the control unit (22) being configured in particular to extrapolate the determined data and to insert the extrapolated data as a predicted progression into the time series display by means of the user interface for a graphical visualization, Service facilities (1).

10. A service installation (1) for a gas space (2.1 to 2.n), comprising: the service installation (1) comprises a gas treatment device (3) for treating the gas present in at least one gas space (2.1 to 2.n), said gas treatment device (3) being configured to carry out purification and / or drying and / or temperature conditioning of said gas, the service installation (1) comprises at least one sensor device for monitoring at least one gas property of said gas, said sensor device being configured to detect as said gas property the gas pressure and / or the gas density and / or the gas temperature and / or the gas humidity and / or the concentration of decomposition products in said gas, the service installation (1) has at least one connection (7.1-7.n) connected to the gas treatment device (3) and to the at least one sensor device, the at least one connection (7.1-7.n) being configured for connection to the gas space (2.1-2.n), the service installation (1) comprises at least one pumping device (8) for pumping gas from the gas spaces (2.1 to 2.n) to the gas treatment device (3) and for at least indirectly returning the gas from the gas treatment device (3) to the gas spaces (2.1 to 2.n), the service installation (1) comprises at least one control unit (22) which is connected to at least the sensor device and which monitors and controls at least the pumping device (8) and / or the gas treatment device (3), Furthermore, the service facility (1) the control unit (22) is configured to observe a predefined waiting time from a previously performed gas treatment process in the gas space (2.1-2.n) before the gas treatment process is performed in the same gas space (2.1-2.n), In particular, the service facility (1) the control unit (22) is configured to set the waiting time based on the volume of the gas spaces (2.1-2.n), where the waiting time is longer as the volume increases, or the control unit (22) is configured to set the waiting time based on the filling state of at least one filter of the gas treatment device (3), or the control unit (22) is configured to set the waiting time based on a leakage rate of the gas spaces (2.1-2.n), the leakage rate having been previously determined by recording the operating pressure of said gas spaces (2.1-2.n) over a test period, or the control unit (22) is configured to set the waiting time based on the gas properties of the gas present inside the gas spaces (2.1-2.n); and / or the gas treatment process for the further gas spaces (2.1 to 2.n) is configured to be carried out during the waiting time to be observed of the preceding gas spaces (2.1 to 2.n), Service facilities (1).

11. A service installation (1) for a gas space (2.1 to 2.n), comprising: the service installation (1) comprises a gas treatment device (3) for treating the gas present in at least one gas space (2.1 to 2.n), said gas treatment device (3) being configured to carry out purification and / or drying and / or temperature conditioning of said gas, the service installation (1) comprises at least one sensor device for monitoring at least one gas property of said gas, said sensor device being configured to detect as said gas property the gas pressure and / or the gas density and / or the gas temperature and / or the gas humidity and / or the concentration of decomposition products in said gas, the service installation (1) has at least one connection (7.1-7.n) connected to the gas treatment device (3) and to the at least one sensor device, the at least one connection (7.1-7.n) being configured for connection to the gas space (2.1-2.n), the service installation (1) comprises at least one pumping device (8) for pumping gas from the gas spaces (2.1 to 2.n) to the gas treatment device (3) and for at least indirectly returning the gas from the gas treatment device (3) to the gas spaces (2.1 to 2.n), the service installation (1) comprises at least one control unit (22) which is connected to at least the sensor device and which monitors and controls at least the pumping device (8) and / or the gas treatment device (3), the service installation (1) is configured to increase the gas pressure inside the gas spaces (2.1-2.n) to a value above a standard operating pressure before the gas treatment process is carried out; the service installation (1) is configured in particular by means of the control unit (22) to determine and control, when the gas treatment process is carried out, the gas volume of treated gas returned to each of the gas spaces (2.1-2.n) in such a way that the gas pressure in the gas spaces (2.1-2.n) after the complete return of said gas volume corresponds to the standard operating pressure, the service installation (1) is configured in particular by means of the control unit (22) to determine and set, when the gas treatment process is carried out, the gas volume to be removed from each of the gas spaces (2.1-2.n) in such a way that the gas pressure inside the gas spaces (2.1-2.n) after the removal of said gas volume is above a defined minimum target value, Service facilities (1).

12. A service installation (1) for a gas space (2.1 to 2.n), comprising: the service installation (1) comprises a gas treatment device (3) for treating the gas present in at least one gas space (2.1 to 2.n), said gas treatment device (3) being configured to carry out purification and / or drying and / or temperature conditioning of said gas, the service installation (1) comprises at least one sensor device for monitoring at least one gas property of said gas, said sensor device being configured to detect as said gas property the gas pressure and / or the gas density and / or the gas temperature and / or the gas humidity and / or the concentration of decomposition products in said gas, the service installation (1) has at least one connection (7.1-7.n) connected to the gas treatment device (3) and to the at least one sensor device, the at least one connection (7.1-7.n) being configured for connection to the gas space (2.1-2.n), the service installation (1) comprises at least one pumping device (8) for pumping gas from the gas spaces (2.1 to 2.n) to the gas treatment device (3) and for at least indirectly returning the gas from the gas treatment device (3) to the gas spaces (2.1 to 2.n), the service installation (1) comprises at least one control unit (22) which is connected to at least the sensor device and which monitors and controls at least the pumping device (8) and / or the gas treatment device (3), The service facility (1) is an internal sensor device for monitoring at least one gas property of the gas in the gas treatment device (3); a recycle unit for exchanging gas from said gas treatment device (3), a pumping device (8) for pumping gas from the gas treatment device to the recycle unit and vice versa; Including, the control unit (22) stores or is capable of storing limit values ​​for at least one gas property of the gas in the gas treatment device (3); the service facility (1) in particular detects, by means of the control unit (22), that the gas properties of the gas in the gas treatment device (3) during the gas treatment process have exceeded the limit value by means of the internal sensor device, and if the limit value is detected, - after the end of the gassing process, the gassing device (3) is emptied, in particular evacuated, by means of the pumping device (8), - re-purifying the gas from the gas treatment device (3) in the recycle unit or storing it in a storage tank; Refilling the gas treatment device (3) with repurified gas from the recycle unit or with pure gas from a pure gas reservoir before the next gas treatment process begins It is structured as follows: the internal sensor device is in particular configured to monitor the concentration of decomposition products in the gas in the gas treatment device (3), the limit value being a maximum allowable concentration of decomposition products; Service facilities (1).

13. in said control unit (22) setpoint values ​​and / or permissible deviations from setpoint values ​​for each gas characteristic and each gas space (2.1 to 2.n) are stored or can be stored, and / or the control unit (22) is coupled or capable of being coupled to a storage device; the control unit (22) is adapted to read out each of the setpoint values ​​and / or the permissible deviations from the setpoint values ​​from the storage device and to associate them with the associated gas spaces (2.1 to 2.n); A service facility (1) according to any one of the preceding claims.

14. the control unit (22) is configured to initially detect the respective gas properties in the gas spaces (2.1 to 2.n) by means of the sensor devices in order to determine the target values ​​and to store these values ​​as the target values; and / or the control unit (22) is coupled to or includes an input device configured for manually inputting the respective target value and / or configured as a wirelessly connected mobile terminal (18, 19), A service facility (1) according to claim 13.

15. The gas treatment device (3) comprises a drying unit, The drying unit is configured to dry the gas by cooling and condensing water vapor. A service facility (1) according to any one of the preceding claims.

16. the pumping device (8) is configured to pump, as the gas, sulfur hexafluoride, nitrogen, carbon dioxide, air, fluoronitriles, fluoroketones and / or a mixture of at least two of the aforementioned gases, the gas treatment device (3) is adapted to treat as the gas sulfur hexafluoride, nitrogen, carbon dioxide, air, fluoronitriles, fluoroketones and / or a mixture of at least two of the aforementioned gases; A service facility (1) according to any one of the preceding claims.

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