Test systems for testing electrical equipment, including their main and auxiliary equipment.

Abstract

This invention relates to a test system (10) for testing electrical equipment (30), particularly high-voltage equipment, comprising: a portable main device (100) having a housing (140), electrical connection mechanisms (120, 121), and mechanical connection mechanisms (145); and a portable auxiliary device (200, 300) having another housing (240, 340), electrical connection mechanisms (220, 320), and mechanical connection mechanisms (245). The main device (100) can be releasably mechanically connected to the auxiliary device (200, 300) by coupling the respective mechanical connection mechanisms (145, 245) to form a structural unit, wherein the main device (100) can be electrically connected to the auxiliary device (200, 300) via the first electrical connection mechanism (120, 121, 220, 320).

Description

Technical Field

[0001] This invention relates to a test system for testing electrical equipment operating on voltage or current, a portable main device and a portable auxiliary device for testing such electrical equipment, and a hybrid cable for connecting the portable main device to the portable auxiliary device.

[0002] Specifically, this invention belongs to the field of high voltage and high current measurement technology, and particularly relates to a test system for testing high voltage equipment, a portable main device and a portable auxiliary device for testing high voltage equipment, and a hybrid cable for connecting the portable main device to the portable auxiliary device. Background Technology

[0003] In power supply networks, high-voltage equipment, or more generally, electrical equipment such as power transformers or switchgear, is commonly used for the conversion and distribution of electrical energy. Other electrical equipment, such as high-voltage converters or high-current converters, circuit breakers, generators, or relays, are conventionally used for the generation and distribution of electrical energy, or as components of protection systems. Such electrical equipment, or other electrical equipment such as motors, are also used in industrial environments.

[0004] When putting facilities with such high-voltage equipment into operation or during maintenance, it is necessary to check their functions and characteristics. This involves applying appropriate test signals to the test object and recording and evaluating the corresponding test response to measure relevant variables. Examples of such measurements include contact resistance, switching characteristics, conductivity, transformation ratio, loss factor, isolation, or partial discharge.

[0005] This test is often conducted on-site, that is, in outdoor or industrial environments. In such cases, especially for field applications, the equipment used should be lightweight, flexible, and robust enough to be transported to the relevant usage location. Summary of the Invention

[0006] Therefore, there is a need for a testing system for testing electrical equipment, especially high-voltage equipment, that is easy to transport, has good operational capabilities and a variety of functions, and also provides a high degree of operational safety.

[0007] This invention satisfies the above requirements through a test system for testing electrical equipment according to claim 1, a portable main device for testing electrical equipment according to claim 16, a portable auxiliary device for testing electrical equipment according to claim 18, and a hybrid cable for connecting the portable main device to the portable auxiliary device according to claim 20. Various advantageous embodiments, further extensions, and modifications of this invention constitute the technical solutions of the dependent claims.

[0008] This invention is preferably used for testing high-voltage equipment, but is not limited thereto. It can also be used to inspect equipment operating in low or medium voltage ranges; that is, it is applicable to equipment operating at all voltage levels.

[0009] The test system for testing electrical equipment includes a portable main device having a housing, a mechanical connection mechanism or corresponding connection mechanism disposed on the housing, and an electrical connection mechanism or electrical plug interface disposed on the housing. Furthermore, the test system includes a portable auxiliary device separate from the portable main device, the auxiliary device having a housing, a mechanical connection mechanism disposed on the housing, and an electrical connection mechanism disposed on the housing. By coupling the mechanical connection mechanisms, the portable main device can be releasably mechanically connected to the portable auxiliary device to form a structural unit, and an electrical connection can be formed between the portable main device and the portable auxiliary device via the electrical connection mechanisms.

[0010] This invention is preferably used for testing high-voltage equipment. In the context of this invention, "high-voltage equipment" should be understood as any equipment that operates at a high voltage, i.e., at least in the range of 1kV, or with a correspondingly large current.

[0011] Furthermore, in the context of this invention, "portable" should at least be understood to mean that the above-mentioned system and corresponding equipment can be transported by the user, and in particular can be worn by the user.

[0012] One advantage of the portable main device and the portable auxiliary device, each with its own casing, is that they can be transported independently to their respective locations, especially in field applications. Furthermore, the functionality of the testing system can be expanded using different auxiliary devices, depending on the measurement / test to be performed.

[0013] According to a preferred design example, the main device and the auxiliary device can be configured as independent test devices, particularly high-voltage test devices. By coupling the main device to the auxiliary device, a test system with variable functions and / or a series of extended functions can be obtained, and the external manifestation of this test system is a structural unit with correspondingly formed combined measuring devices. When the coupling between the main device and the auxiliary device is released, the main device and the auxiliary device can again function as independent measuring devices.

[0014] When the main device is coupled to the auxiliary device, the main device can control the generation of test signals for the electrical equipment under test, or automatically control the entire test sequence, and may have a control device accordingly formed for this purpose.

[0015] Similarly, the main device may have a power amplifier that generates a power signal, which is sent to a test signal device of the auxiliary device so that the auxiliary device generates a test signal to be output to the electrical device under test, particularly a high-voltage test signal with a voltage of at least 1kV.

[0016] The test response of the electrical device under test (EDT) to the test signal is preferably evaluated by the measuring device of the main device to measure the target measurement variable of the EDT. For this purpose, the test response can be recorded by the auxiliary device and sent to the main device. In this case, the auxiliary device is equipped with all the measurement inputs and outputs to perform the measurement itself. This method is particularly recommended for testing voltage converters, especially high-voltage converters. However, the test response can also be directly recorded and evaluated by the main device. The latter method is particularly recommended for testing current converters, especially high-current converters.

[0017] When the main device and the auxiliary device are coupled, especially when the main device and the auxiliary device have the same or substantially similar dimensions at their contact surfaces where they can be mechanically coupled or connected to each other via the respective mechanical connection mechanisms, a compact and easily managed structural unit can be obtained. The main device and the auxiliary device preferably have the same shape parameters, that is, the same or substantially similar external dimensions.

[0018] When the electrical connections are configured appropriately, the portable main device and portable auxiliary device can even be connected by only a single cable for testing the electrical equipment. This simplifies and / or enhances the reliability of handling, especially on-site handling. The cable can be a hybrid cable, through which power signals, data signals, and / or safety signals can be transmitted between the portable main device and portable auxiliary device. This hybrid cable is particularly useful for enabling the simultaneous transmission of different signals or information. For this purpose, the hybrid cable can contain conductors specifically designed for different types of signals, but different signals or information can also be transmitted through the same conductor.

[0019] In one embodiment, the portable main device may be configured without a power transformer or a high-voltage / high-current transformer; however, if the test system requires such a power transformer for certain tests, it may be provided only in the relevant portable auxiliary device. This advantageous approach reduces the weight of the portable main device, and / or allows the test system to be modularly disassembled into several parts, such as the main device and auxiliary devices, as needed, thereby facilitating transport.

[0020] By using the main equipment and the auxiliary equipment separated from it, the functions of the target test system can typically be divided between the main equipment and the auxiliary equipment, thereby improving overall variability, flexibility, and operational safety. When the main equipment has a group of auxiliary equipment consisting of several different auxiliary equipment with different functions and / or components, a modular test system with optimal matching between function and relevant field conditions and corresponding target test conditions can be obtained by selecting appropriate auxiliary equipment for each situation.

[0021] Other advantages, features, and possible applications are detailed in the following design examples and / or in the accompanying drawings. Attached Figure Description

[0022] The invention will be described in further detail below with reference to the accompanying drawings and advantageous design examples. Unless otherwise stated, or unless the context reveals a different meaning, the same elements or structural components are labeled with the same reference numerals in the various design examples.

[0023] Figure 1 The image shows a test system according to one embodiment.

[0024] Figure 2 The image shows a portable host device according to one embodiment.

[0025] Figure 3 The image shows a hybrid cable according to one embodiment.

[0026] The figures are schematic diagrams illustrating different embodiments and / or design examples of the present invention. The elements and / or structural components in the figures are not necessarily drawn to scale. Rather, the figures are drawn in a manner intended to enable those skilled in the art to understand their function and / or purpose.

[0027] The connections and couplings between functional units and components in the diagram can also be implemented as indirect connections or couplings. It is particularly worth mentioning that data connections can be wired or wireless, that is, especially wireless connections. For clarity, some connections, such as electrical connections used for power supply, may not be shown in the diagram. Detailed Implementation

[0028] In the following description, although the invention is illustrated using the testing of high-voltage equipment as an example, it is not limited thereto. The invention can also be used to inspect equipment operating in the low-voltage or medium-voltage range, that is, it is applicable to equipment operating at all voltage levels.

[0029] Figure 1 This is a schematic diagram of a test system 10 for testing high-voltage equipment, i.e., electrical equipment operating at high voltage or, more precisely, at a suitably large current, according to an embodiment of the present invention.

[0030] In one design example, the test system 10 has a portable master device 100, a portable auxiliary device 300, and another portable auxiliary device 200, each connected to each other via a hybrid cable, and in some embodiments, each connected to each other via a hybrid cable 20 of the test system 10.

[0031] Figure 1 The high-voltage device 30 under test is also shown.

[0032] The portable main device 100 has a housing 140, which has a bottom surface 141, a side surface 142, and a top surface 143. The bottom surface 141 is designed to face the lower surface when the portable main device 100 is placed on the lower surface. Correspondingly, the portable auxiliary device 200 has a housing 240, which has a bottom surface 241, a side surface 242, and a top surface 243. The portable auxiliary device 300 also has a housing 340, which in some embodiments can correspond to the housing 240 of the portable auxiliary device 200 with corresponding electrical and mechanical connection elements; further details are not shown in the figures for clarity.

[0033] Furthermore, the housings 140 and 240 of the portable main device 100 and the portable auxiliary device 200 respectively have mechanical connecting elements 145 and 245 for releasably connecting the portable main device 100 to the auxiliary device 200 in a releasable manner, particularly by pressure engagement, form engagement, or friction locking, when the portable main device 100 is placed with its bottom surface 141 on the top surface 243 of the auxiliary device 200. In this advantageous manner, the main device 100 and the auxiliary device 200 can be mechanically connected to each other (e.g., in the field), thereby particularly facilitating the operation of the portable main device and / or improving the handling of the test system 10.

[0034] exist Figure 1 In the design example shown, the main device 100 is placed on the auxiliary device 200 such that the bottom surface 141 of the main device 100 is located on the top surface 243 of the auxiliary device. The dimensions of the bottom surface 141 and the top surface 243 are preferably such that they largely correspond to each other, thereby achieving a compact and integrated structure when the main device 100 and the auxiliary device are coupled. Figure 1 As shown, each of the devices 100, 200, and 300 can generally have the same shape parameters, that is, the same external dimensions.

[0035] Each device, preferably in sets of 100, 200, or 300, is configured as an independent measuring device.

[0036] In this regard, the portable main device 100 has a connection mechanism 120 for connecting the high-voltage equipment 30 and disposed on the housing 140, another connection mechanism 121, and one or more test connectors 130. Preferably, the connection mechanism 120 (and, correspondingly, the other connection mechanism 121) has only connectors 122, 128, all of which are spaced apart from each other by a distance less than a predetermined interval, so that all of these connectors can be precisely connected to one end of the hybrid cable 20. This facilitates the connection of the hybrid cable and avoids any cable tangling compared to other systems with multiple cables or larger cable spacing, thereby improving safety. The first set of connectors 122 of the connection mechanism 120 is used for output power signals, and the second set of connectors 128 of the connection mechanism 120 is used for data communication. Additionally, another set of connectors (not shown) may be provided for transmitting safety signals to control the safety functions of the test system.

[0037] Another portable auxiliary device 200 has a corresponding connection mechanism 220 disposed on the side 242. Preferably, the connection mechanism 220 also has connectors 222, 228, all of which are spaced apart from each other by a distance less than a predetermined interval. The first set of connectors 222 of the connection mechanism 220 of the other portable auxiliary device 200 is used to receive power signals, and the second set of connectors 228 of the connection mechanism 220 is used for data communication and / or for transmitting security signals. One end of a hybrid cable 20 is connected to the connection mechanism 120 of the portable main device 100, and the other end is connected to the connection mechanism 220 of the other portable auxiliary device 200, thereby realizing the connection between the main device 100 and the other auxiliary device 200.

[0038] Accordingly, the portable auxiliary device 300 has one or more test connectors 330 and a connection mechanism 320 disposed on the housing 340 of the portable auxiliary device 300. The first set of connectors 322 of the connection mechanism 320 is used to receive power signals, and the second set of connectors 328 of the connection mechanism 320 is used for data communication and / or for transmitting security signals. All these connectors are preferably spaced apart from each other by a distance less than a predetermined interval.

[0039] Portable auxiliary device 300 (and, correspondingly, in some embodiments, another portable auxiliary device 200) is operable in a test mode and is used to convert the received power signal into a first test signal in the test mode and apply it to the high-voltage equipment 30 to be connected via the output connector 332 of the test connector 330 of the portable auxiliary device 300.

[0040] In addition, the portable main device 100 has a power amplifier 102 for generating a power signal, a measuring device 160 for measuring a variable, and a control device 180 for controlling the power amplifier 102 and the measuring device 160. In some embodiments, it also has a timer 106 for providing a time signal. All these devices are housed within the housing 140 of the main device 100.

[0041] In some schemes, the same is true. Figure 1As shown, the portable auxiliary device 300 is used for high-voltage test signal devices and includes a high-voltage transformer 302, a current sensor 366, and a timer 306 that provides a time signal, all housed within the portable auxiliary device 300 housing 340. Furthermore, for the first test of the high-voltage device 30, the control device 180 of the portable main device 100 triggers the portable auxiliary device 300 via connection mechanisms 121 and 320 and through one of the hybrid cables 20, thereby controlling the portable auxiliary device 300 to initiate its test mode. Additionally, for the first test, the control device 180 generates a power signal via the power amplifier 102 and outputs it to the portable auxiliary device 300 via connection mechanisms 121 and 320.

[0042] In the test mode, the high-voltage test signal device, i.e. the portable auxiliary device 300, is used to convert the power signal into a first test signal through the high-voltage transformer 302, thereby making the power signal electrically isolated from the first test signal, and making the first test signal have a voltage of at least 1kV suitable for high-voltage testing.

[0043] Furthermore, in test mode, the portable auxiliary device 300 receives a first analog measurement signal generated by the first test signal via the measurement input terminal 336 of the test connector 330, and transmits a data signal characterizing the first measurement signal to the portable main device 100 in a digitally and electrically isolated manner via one of the hybrid cables 20 and through the connection mechanism 320 and the connection mechanism 121. The portable main device 100 and the portable auxiliary device 300 can also be configured to be spatially separated from each other, thereby combining electrical isolation to improve operational safety.

[0044] In an alternative embodiment, the connection mechanisms 120, 121, 220, 320 are implemented by a boost plug or a boost connector.

[0045] In an alternative embodiment, auxiliary device 300 may also have a digital measurement input for receiving digital measurement signals and / or transmitting analog data signals. Digital transmission of data signals offers particular advantages: it allows for easier and / or more precise electrical isolation, and / or avoids or at least reduces interference with the measurement signals, thereby avoiding or at least reducing interference with the measurement or testing. The sensor 366 can be used to record the first analog measurement signal received at measurement input 336, digitize it, and provide it as a data signal.

[0046] Finally, for the first test, the control device 180 is used to measure a first measurement variable based on a first measurement signal via the measuring device 160. For the loss factor measurement associated with the high-voltage equipment 30, the analog measurement signal is an alternating current flowing through the isolation components of the high-voltage equipment 30 when an alternating voltage is applied, wherein the measurement variable is at least the amplitude or effective value of the alternating current and the signal progression of the alternating current relative to the applied measured alternating voltage, or determined in time.

[0047] In some implementations, the control device 180 also executes a communication protocol that provides fault-tolerant protection for data communication via the second set of connectors 128 of the connection mechanism 120, and activates an error mode for the portable master device when an error occurs during data communication. In this error mode, no power signal is output via the first set of connectors 122. Alternatively, in this error mode, the control device 180 controls the portable auxiliary device 300 to activate its own error mode. Thus, for example, when a data communication interruption occurs, the interruption can be detected by a fault-tolerant communication protocol, thereby improving operational safety by preventing the output of power signals. For example, the error mode of the auxiliary device 300 can also be activated when the data communication delay exceeds a predetermined time. In this case, the auxiliary device can be configured to stop outputting test signals, or to disconnect the high-voltage device 30 from the test connector 330, or to stop recording measurement signals, or to stop sending them as data signals to the portable master device 100, thereby improving operational safety and / or improving the reliability or accuracy of the test or measurement.

[0048] Similarly, during the transmission of the aforementioned safety signal via the hybrid cable 20, the safety function of the test system can be triggered when the corresponding conditions are met. Moreover, for example, components of the main device 100 or auxiliary devices 200 and 300 can be activated to improve operational safety.

[0049] In some embodiments, the master device 100 and the auxiliary device 300 (or, together with the auxiliary device 200) can be configured to synchronize with each other. For this synchronization purpose, the master device 100 outputs a synchronization signal via the second set of connectors 128 of the connection mechanism 120. Furthermore, the timer 106 of the master device 100 and the timer 306 of the portable auxiliary device 300 are used to align their time signals according to the synchronization signal, so that the time difference between them is less than a predetermined time length. In some embodiments, the portable master device 100 and the portable auxiliary device 300 are synchronized via the IEC 1588 protocol. In some embodiments of this, the required data communication is achieved via the second set of connectors 128 of the connection mechanism 120 and the second set of connectors 328 of the connection mechanism 320.

[0050] In some schemes, the portable master device 100 is preferably combined with a communication protocol that provides time synchronization and / or fault protection, and is used to generate power signals in real time or to control the portable auxiliary device 300 in real time via the connection mechanism 121 in such a way that the portable auxiliary device 300 generates test signals, and is also used to measure measurement variables in real time based on the measurement signals generated by the test signals.

[0051] In a scheme where the portable auxiliary device 300 is used to record measurement signals and, in particular, to digitize analog measurement signals, in some advantageous schemes the portable auxiliary device 300 is used to provide a measurement signal or a digitized measurement signal with a recording time characterizing the signal and a time code based on the time signal of the internal timer 306, and to provide the signal with the time code as a data signal to the portable main device 100 via the connection mechanism 320 and, in particular, via the second set of connectors 328.

[0052] In some advantageous solutions, for multiphase high-voltage equipment, the portable main device 100 and / or auxiliary device 300 or another auxiliary device 200 have additional channels for multiple phases of the high-voltage equipment with additional test connections such as output connections or measurement connections, so that multiphase tests such as isolation resistance, loss factor or transformation ratio can be performed in a more efficient and / or safer manner without changing the cable connection.

[0053] Figure 2 This is a schematic diagram of a portable main device 100 for testing electrical equipment or high-voltage equipment according to an embodiment of the present invention. In this case, the portable main device 100 can be used according to... Figure 1 The portable host device shown or according to the combination Figure 1 The description provided forms, and may further include mechanical connecting elements. Due to... Figure 2 This mainly involves the internal design and operating mode of the main equipment 100, therefore, for clarity, Figure 2Such mechanical connecting elements are not shown in the diagram.

[0054] The portable main device 100 has a housing 140 and an electrical connection mechanism 120 disposed on the housing 140 for connecting a portable auxiliary device. Preferably, the connection mechanism 120 has only connectors 122 and 128, all of which are spaced apart from each other by a distance less than a predetermined interval, allowing for precise connection to one end of a cable. In this case, the connection mechanism 120 has a first socket 123 containing a first set of connectors 122 for outputting power signals, and a second socket 129 containing a second set of connectors 128 for data communication. Alternatively, the portable main device 100 or the connection mechanism 120 may have other electrical connection elements, such as plugs, multi-connector plugs, or multi-sockets, instead of the first or second sockets 123 and 129.

[0055] Figure 2 The high-voltage device 34 to be tested is also shown.

[0056] The portable main device 100 also includes several test connectors 130 for connecting to the high-voltage equipment 34, which are mounted on the housing 140. Furthermore, the main device 100 includes a power amplifier 102 for generating power and test signals, a measuring device 160 for measuring variables, a control device 180 for controlling the power amplifier 102 and the measuring device 160, and a storage device 186 for storing the measured variables, all housed within the housing 140. The advantage of integrating the measuring device 160, the control device 180, and the power amplifier 102 is particularly that the main device 100 itself can provide all the measurement functions, and can also provide the test current, corresponding test signal, or corresponding test voltage required for certain tests of the high-voltage equipment or electrical equipment via the power amplifier 102. Thus, certain tests can be performed, especially even without portable auxiliary equipment. Advantageously, the measured variables can be stored, especially automatically, via the storage device 186, for example, for subsequent evaluation or as a log record. This can particularly improve the processing of the main device 100 and / or test systems with such main devices. Alternatively, such storage devices may not be included.

[0057] In some designs, the test connector 130 is separated from the connectors 122 and 128 of the connection mechanism 120, that is, especially from the first socket 123 and the second socket 129. This simplifies the process and / or improves operational safety.

[0058] To perform testing without auxiliary equipment or expansion modules, particularly for the second test of high-voltage equipment 34, the test connector has a first output connector 132, a second output connector 134, a first analog measurement input 136, and a second analog measurement input 138. In some embodiments, the portable host device 100 may further have a digital interface 139. In some embodiments in this regard, the digital interface 139 may be formed as part of the test connector 130 as a digital measurement input 139. In alternative embodiments, only one output connector may be provided, and it may have either an analog measurement input or a digital measurement input as a measurement input.

[0059] For the second test, the control device 180 generates a second test signal with a suitable current or a suitable voltage through the power amplifier device 102, applies it to the high-voltage device 34 to be connected to the output connectors 132, 134, and uses the second analog measurement electrical signal and a measuring device also provided on or between the high-voltage device 34 and the analog measurement input terminals 136, 138 when connected thereto, to measure the second measurement variable generated by the second test signal.

[0060] In an alternative or additional scheme with digital measurement input 139, for the second test, control device 180 and measuring device 160 measure a second measurement variable using a second measurement signal generated by the second test signal and transmitted to the digital measurement input. In the case of measuring the transformer under test, for the transformer ratio measurement as the second test, the primary side of the transformer under test can be connected, for example, to output connectors 132, 134. The test current can be generated as a second test signal by power amplifier 102 and fed into the transformer under test via output connectors 132, 134. Finally, the current value generated by the fed test current can be recorded by the transformer under test, output via the transformer under test's digital interface, received via digital measurement input 139, and measured by measuring device 160. Measuring device 160 further measures or determines the transformer ratio based on the fed current and the measured current value.

[0061] For a second or further test, in some embodiments, control device 180 and digital interface 139 are used to send control signals to another component of the test system or a component of the electrical equipment under test, and subsequently receive generated (other) digital measurement signals from that component or even another component, wherein measuring device 160 or control device 180 is used to evaluate such other digital measurement signals. In some embodiments in this regard, portable master device 100 is used for communication via the IEC 61850 protocol.

[0062] In some embodiments, the portable main device 100 has an energy supply device 170, which may be housed within a housing 140, and an AC power connection 172 disposed on the housing 140. In this case, the portable main device 100 is used to supply electrical energy from a power source to the portable main device itself, as well as to auxiliary devices connected via the connection mechanism 120, or auxiliary devices or expansion modules connected via other connections, after the power source is connected to the AC power connection 172. For this purpose, in some advantageous embodiments, a second set of connections 128 of the connection mechanism 120 of the portable main device 100 is also used to supply energy to the portable auxiliary device to be connected. In alternative embodiments, the portable main device and / or auxiliary devices or expansion modules may also be supplied with electrical energy via an external energy supply device or via a corresponding energy supply device of the respective auxiliary device or expansion module.

[0063] In some embodiments, the connection mechanism 120 of the second set of connectors 128 serves specifically as a second connection element 129 and has an EtherCAT interface. In this case, the control device 180 is used to communicate with the portable auxiliary device to be connected to the connection mechanism 120 via the EtherCAT protocol and through the EtherCAT interface 129. In an advantageous embodiment, the EtherCAT interface is also used to provide power to the portable auxiliary device via Power over Ethernet (PoE) technology.

[0064] In some schemes that incorporate timers and / or communication protocols that provide safety protection against faults, the portable master device 100 has a protocol interface that conforms to IEC 1588, while the control device 180 is used as a pulse generator to synchronize with applications communicating with conventional and / or digital substations.

[0065] The advantage of configuring the power amplifier 102 to generate a freely adjustable signal form as a power signal or test signal is that it allows for the superposition of DC current and / or one or more AC currents, or DC voltage and / or one or more AC voltages. This, for example, in the case of "power quality measurement," can significantly shorten the measurement time for a sequence with substantially the same accuracy, or enable the measurement of nonlinear effects. Another advantage is that by setting or selecting a signal form suitable for the relevant test, the portable host device can be adapted to a variety of different tests, thus increasing flexibility and / or improving processing compared to schemes that strictly specify the signal form (e.g., allowing only DC voltage, or only AC voltage with a specific amplitude or frequency).

[0066] In some advantageous embodiments with storage device 186, measuring device 160 and control device 180 are used to determine measurement variables or derived variables thereof for testing high-voltage equipment or electrical equipment according to an electrophysical model of the high-voltage equipment / electrical equipment, wherein the measurement variables or other variables are numerically optimized as parameters of the electrophysical model. In this case, the results of several rounds of such tests or several different tests related to the high-voltage equipment / electrical equipment can be combined, thereby particularly improving the accuracy of such tests / measurements, that is, particularly providing the accuracy of the measurement variables or other variables determined in this way. As an alternative or additional option, the aforementioned measurement variables or other variables can also be determined by conventional methods. In these conventional methods, the values ​​to be determined can be determined particularly based on recorded measurement values ​​without numerical optimization, for example, they can be determined particularly directly by formulas that can be explicitly solved.

[0067] like Figure 2 As shown, the housing 140 of the main device 100 also has a module space 144 for accommodating and connecting to an expansion module. In this case, the portable main device 100 is used to supply power to the expansion module housed in the module space 144 and to control it via a control device 180.

[0068] also, Figure 2 The diagram shows a high-current module used to test an electrical device 34 with a test current. The portable main device 100 includes this high-current module 400 as an expansion module. The housing 440 of the high-current module 400 is configured to fit into a module space 144, and in some embodiments, is designed to form a shape with the module space 144. Alternatively, the portable main device 100 may have other expansion modules, or no expansion modules, or additional module space. For power supply, the module space 144 has a plug connection element 147, and the expansion module or high-current module 400 has a corresponding plug connection element 447 located on the housing 440. For control by a control device, the module space 144 has another plug connection element 148, and the expansion module 400 has a corresponding plug connection element 448 located on the housing 440. Furthermore, the high-current module 400 has a high-current source 401 located within the housing 440, and first and second high-current connectors 432 and 434 located on the housing 440. The high-current module 400 can be used for the third test. Under the control of the control device 180, it generates a high-current signal through the high-current source 401 and provides it as a test signal to the high-current connectors 432 and 434.

[0069] Furthermore, in some embodiments, the portable main device 100 has a user interface 188 located on the housing 140. The user interface 188 records user input and, based on the user input, causes the control device 180 to test the high-voltage equipment or electrical equipment 34, outputting one or more measured variables to the user during the testing process. In addition, sequential testing can be performed, where it is advantageous to determine the measured variables and other parameters, characteristics, or functions of the high-voltage equipment or electrical equipment based on a model, particularly an electrophysical model fed with the measured values ​​recorded in multiple tests.

[0070] In this configuration, the control device 180 controls the power amplifier 102 and any portable auxiliary devices or expansion modules for other tests, respectively, to generate test signals or power signals suitable for each situation. Furthermore, in this configuration, the control device 180 measures one or more corresponding measurement variables via the measuring device 160 and any auxiliary devices or expansion modules, and stores the measurement variables via the storage device 186.

[0071] Figure 3 A hybrid cable 20 is provided for connecting a portable main device to a portable auxiliary device according to one embodiment of the present invention.

[0072] In one design example, the hybrid cable 20 has at least one conductor 22 for transmitting power signals and at least one conductor 28 for data communication and / or security signal transmission. Furthermore, the hybrid cable 20 has a first electrical connection element 23 located at an end 24 for the portable host device. This first electrical connection element 23 is used to releasably connect to a first electrical connection element (such as...) of the connection mechanism of the portable host device. Figure 2 (Connecting element 123 in the middle). Furthermore, the hybrid cable has a first electrical connecting element 21 located at the other end 26 for the portable main device, the first electrical connecting element 21 for releasable connection to the connection mechanism of the portable auxiliary device (e.g., ...). Figure 1 The first electrical connection element of the connection mechanism 220 or 320 in the middle.

[0073] In some embodiments, the hybrid cable 20 has at least one grounding conductor. In some embodiments of this aspect, the first electrical connection elements 21, 23 are also used to releasably connect the grounding conductor to corresponding connectors of the connection mechanism of the portable main device and the connection mechanism of the portable auxiliary device. In alternative embodiments of this aspect, the hybrid cable 20 also has additional electrical connection elements for the grounding conductor at end 24 and / or end 26.

[0074] As shown in the figure, the hybrid cable 20 also has a second electrical connection element 29 disposed at the end 24 for the portable host device, the second electrical connection element 29 being used to connect to the second electrical connection element (e.g., of the portable host device). Figure 2 The hybrid cable 20 has a second electrical connection element 27 located at the end 26 for the portable auxiliary device. This second electrical connection element 27 is used to connect to the second electrical connection element of the connection mechanism of the portable auxiliary device. In this case, the second connection elements 24 and 27 are used to connect the wire 28 used for data communication or security signal transmission to a corresponding connector (such as...) of the connection mechanism of the portable main device at the end 24 for the portable main device. Figure 1 The second set of connectors 128 is electrically connected in a releasable manner, and is connected at the end 26 of the portable auxiliary device to the corresponding connector of the connection mechanism of the portable auxiliary device (e.g., ...). Figure 1 The connectors 228 or 328 are electrically connected in a releasable manner.

[0075] In some designs, each electrical connection element 21, 23, 27, 29 is formed as a plug. Alternatively, particularly for enhanced safety, the first electrical connection element 21 at end 26 may also be formed as a socket, so that it has no exposed contacts, thereby protecting any power signals present there from touch. The second electrical connection element 27 at end 26 may also be formed as a socket, thus combining with the socket-formed electrical connection elements 21 to allow several such hybrid cables to be interconnected into a longer hybrid cable.

[0076] In an alternative, the hybrid cable may have only a corresponding first electrical connection element at each end 24, 26, wherein these electrical connection elements are used to further electrically connect the conductor 28 for data communication and / or security signal transmission in a releasable manner to a corresponding connector of the connection mechanism of the portable host device at end 24, and to releasably connect it to a corresponding connector of the connection mechanism of the portable auxiliary device at end 26. In this embodiment, the hybrid cable may correspondingly have a hybrid plug for both the portable host device at end 24 and the portable auxiliary device at end 26, wherein the hybrid plug integrates the functions of connection elements 23, 29, 21, 27, that is, all conductors and connectors are formed in the same cable 20 and in the same plug or connection element at both ends 24, 26.

[0077] The hybrid cable 20 has a cable sheath 25 that wraps all conductors 22 and 28 at least in the middle portion of the hybrid cable, and wraps conductors 22 and 28 at the end portion at end 24, and correspondingly wraps conductors 22 and 28 at the end portion at end 26.

Claims

1. A testing system (10) for testing electrical equipment (30, 34), characterized in that, include: The portable main device (100) has a first housing (140), a first mechanical connection mechanism (145) disposed on the first housing, and a first electrical connection mechanism (120, 121) disposed on the first housing; as well as The portable auxiliary device (200, 300), separate from the portable main device (100), has a second housing (240, 340), a second mechanical connection mechanism (245) disposed on the second housing, and a second electrical connection mechanism (220, 320) disposed on the second housing. Wherein, by coupling the first mechanical connection mechanism (145) to the second mechanical connection mechanism (245), the portable main device (100) can be releasably mechanically connected to the portable auxiliary device (200, 300) to form a structural unit, and The portable main device (100) can be electrically connected to the portable auxiliary device (200, 300) via the first electrical connection mechanism (120, 121) and the second electrical connection mechanism (220, 320). The portable main device (100) has a power amplification device (102) for generating a power signal to be transmitted to the portable auxiliary device (200, 300) via the first electrical connection mechanism (120, 121) and the second electrical connection mechanism (220, 320). The portable auxiliary equipment (200, 300) includes a test signal device (302), which generates a test signal based on the power signal of the portable main equipment (100). This test signal is to be output to the electrical equipment (30, 34). The portable main device (100) has a measuring device (160) for measuring a measurement variable of the electrical equipment (30, 34), which serves as a test response to the test signal of the portable auxiliary device (200, 300).

2. The test system (10) according to claim 1 is used to test high-voltage electrical equipment (30, 34).

3. The testing system (10) according to claim 1, characterized in that, The portable main device (100) and the portable auxiliary device (200, 300) can be releasably connected at the contact surfaces (141, 243) of the portable main device (100) and the portable auxiliary device (200, 300) to form the structural unit, wherein the size of the contact surface (141) of the portable main device (100) substantially corresponds to the size of the contact surface (243) of the portable auxiliary device (200, 300).

4. The testing system (10) according to claim 1, characterized in that, The first mechanical connection mechanism (145) and the second mechanical connection mechanism (245) are configured such that the portable main device (100) can be connected to the portable auxiliary device (200, 300) by pressure fit, form fit and / or friction fit to form the structural unit.

5. The testing system (10) according to claim 1, characterized in that, The first housing (140) of the portable main device (100) and the second housing (240, 340) of the portable auxiliary devices (200, 300) have substantially the same dimensions.

6. The testing system (10) according to claim 1, characterized in that, The portable auxiliary device (200, 300) has a transformer (302) as the test signal device, and is configured such that the portable auxiliary device (300) converts the power signal of the portable main device (100) into the test signal through the transformer (302), thereby making the power signal and the test signal electrically isolated, and the test signal having a voltage of at least 1KV.

7. The test system (10) according to claim 1, characterized in that, The portable auxiliary device (200, 300) is used to record the test response to the test signal and send the test response to the measuring device (160) of the portable main device (100).

8. The testing system (10) according to claim 1, characterized in that, The portable master device (100) is configured to record the test response to the test signal of the portable auxiliary device and forward the test response to the measuring device (160) of the portable master device (100).

9. The test system (10) according to claim 1, characterized in that, The portable main device (100) has a control device (180) for controlling the power amplifier (102) and the measuring device (160).

10. The test system (10) according to claim 9, characterized in that, The control device (180) is configured to trigger the test signal device (302) of the portable auxiliary device (200, 300) to generate the test signal to be output to the electrical device (30, 34) via an electrical connection between the first electrical connection mechanism (120, 121) and the second electrical connection mechanism (220, 320).

11. The testing system (10) according to claim 9, characterized in that, The control device (180) is configured to control the test of the electrical equipment (30, 34) via an electrical connection between the first electrical connection mechanism (120, 121) and the second electrical connection mechanism (220, 320) and via the test signal from the portable auxiliary device (200, 300).

12. The test system (10) according to claim 1, characterized in that, Includes a hybrid cable (20) for electrically connecting the portable main device (100) to the portable auxiliary device (200, 300) via the first electrical connection mechanism (120) and the second electrical connection mechanism (220, 320), and for simultaneously transmitting the power signal and the data signal.

13. The test system (10) according to claim 12, characterized in that, The hybrid cable (20) is further used to simultaneously transmit safety signals.

14. The test system (10) according to claim 1, characterized in that, The portable main device (100) has an energy supply device (170) and is used to supply energy to the portable auxiliary devices (200, 300) through the energy supply device (170).

15. The test system (10) according to claim 1, characterized in that, Both the portable main device (100) and the portable auxiliary devices (200, 300) are configured as independent measuring devices.

16. The test system (10) according to claim 12, characterized in that, The hybrid cable (20) includes: An electrical connection element (23) is provided at the end (24) of the portable host device (100) and for releasably connecting to the first electrical connection mechanism (120) of the portable host device (100); An electrical connection element (21) is provided at the other end (26) of the portable auxiliary device (200, 300) and is used to releasably connect to the second electrical connection mechanism (220, 320) of the portable auxiliary device (200, 300); At least one wire (22) for transmitting the power signal between the portable main device (100) and the portable auxiliary device (200, 300); At least one wire (28) for data communication between the portable master device (100) and the portable auxiliary device (200, 300); and At least one wire for transmitting a safety signal between the portable master device (100) and the portable auxiliary device (200, 300).

Images