Housing for an electrical device having a cover

Abstract

The housing of an electrical device for converting electrical power comprises a body having a rear wall and side walls, and a cover, the cover closing the body to form a self - contained internal space in which the electrical and electronic components of the electrical device are arranged. The cover is removably connected to the body by a cover closure, the cover closure comprising fixing means (15) and a closure housing (11), the fixing means (15) being held rotatably and non - axially displaceably within the closure housing (11). The closure housing (15) is fixed to the cover at the geometric center of the cover. The body includes a pin (16) extending from the rear wall of the housing to the geometric center of the cover, and the connection between the cover and the pin (16) is releasable by rotating the fixing means (15), and can be established by at least one guide peg (17) of the pin (16) and at least one guide groove (20) which partially spirally circumscribes the fixing means (15).

Description

Technical Field

[0001] The present invention relates to a housing for an electrical device for converting electric power, and an electrical device having a corresponding housing.

[0002] The electrical device referred to in this disclosure processes electric power, in particular by converting a current from one form to another, for example from direct current to alternating current, or vice versa, or by deliberately changing important characteristics of the electric power, such as voltage or frequency. In particular, the electrical device is an electronic power device, i.e. a power converter, in which case a circuit breaker is arranged in the converter topology and interacts with capacitors and inductors.

[0003] During the operation of this type of electrical device, the voltage and current applied to the terminals of the power converter are affected as desired by proper clocking of the circuit breaker. Considerable power can flow through the electrical device and be exchanged between the devices connected thereto. For example, an energy source, in particular an electrical supply network, a generator or a battery, can be connected via a power converter within the housing according to the invention to an energy sink, in particular a load, a battery or a (further) electrical supply network.

[0004] In the field of renewable energy, supply inverters to the power grid, such as solar power generation inverters, are generally designed for outputs of around 1 kilowatt or more. This also applies to battery converters that are connected to energy storage devices and supply power to, for example, island networks. In electrical equipment with a housing, powers exceeding 10 kilowatts are also routinely converted. In larger-scale power generation systems, the rated power of individual power electronic devices is in the megawatt range, and voltages in the kilovolt range and currents in the kiloampere range occur. In principle, there is no upper limit to the rated power, but it essentially depends on technological progress regarding available circuit breakers, suitable topologies, achievable power densities, and materials. In principle, as the rated power of electrical equipment increases, the volume of the corresponding housing also increases. Therefore, at very high power levels, instead of a housing, other mechanical concepts, especially control cabinets, can be used.

[0005] The housing of such electrical equipment needs to meet various regulatory requirements depending on the application field. In particular, the housing can shield the interior of the device from its surroundings and be closed, for example, in the form of dust and water protection, resulting in an IP protection class according to DIN EN 60529 and / or corresponding to one of the NEMA protection classes according to NEMA standard 250-2003. Furthermore, the housing must be able to pass additional mechanical tests according to DIN and / or UL standards with respect to external influences such as compression, impact tests, bird strikes, and / or special exposure to water.

[0006] When dealing with high power, extremely high energy concentrations can accumulate in a very short time. This may be desirable, for example, when using a capacitor or inductor to dynamically and temporarily store electrical energy during the process of converting the form of current to another form. However, undesirable energy concentrations can also occur, especially after a failure, malfunction, or unexpected aging deterioration. In such cases, electrical energy can be converted to a significant extent into thermal energy and / or mechanical energy, for example, by the components being heated violently and exploding, or by combustible substances accumulating inside the housing through, for example, an (electro)chemical conversion process and being ignited by an electrical flashover (which is harmless in itself).

[0007] As a result, a significant overpressure can accumulate inside the housing of the electrical device (which is itself sealed). In the case of a power electronics converter (for example, one with either a normal protection class IP44 or IP65), the overpressure can accumulate very rapidly, for example, within a few milliseconds, under adverse conditions. However, this should not cause the housing to be destroyed in an unpredictable way, for example, by being uncontrollably shattered and, in some cases, fragments flying out from the inside.

[0008] If the housing is not constructed using sufficient material resources to withstand any expected overpressure, the overpressure in the internal space of the housing can be reduced by providing a relief opening. However, at the same time, in order to comply with the relevant standards, it is necessary to design the housing to properly protect the interior during normal operation, provide mechanical stability against external influences, and in some cases, seal it in a way that has waterproofing, and even airtightness and dustproofness.

[0009] These two objectives, namely, to sufficiently protect the power electronics components placed inside from the environment during normal operation and thus, and on the other hand, to provide a sufficiently large relief opening in a controlled state in case of overpressure, are initially functionally contradictory to each other and severely limit the available solution space. Also, it is important that the electrical device can be installed as simply as possible and that access to the inside is possible, for example, for maintenance and repair work.

Background Art

[0010] In the prior art, various solutions are known that are intended to control a sudden overpressure in a sealed housing to some extent and relieve the pressure as safely as possible.

[0011] For example, a deformable fixing element is attached to the housing and deformed when a sudden overpressure occurs inside the housing to create a gap between the cover and the housing through which the overpressure can escape. Also, a recess can be provided at the fixing points between the cover and the housing, whereby the housing can be deformed when an overpressure occurs inside. Furthermore, a pressure relief mechanism is known in which the pressure relief opening of the housing is closed by an outer cover pulled inward by a spring and opened by being pushed outward by the overpressure. Another possibility for pressure relief is a pressure relief flap that can swing open during overpressure. However, this may allow the internal components to freely come out to the surroundings.

[0012] DE102019122812A1 discloses a housing of an electrical device in which a cover is connected to a housing body via removable fixing means. The fixing means is arranged at the geometric center of the cover and is preferably formed by a central threaded nut that can be screwed onto a threaded rod extending outward and connected to the housing body, thereby fixing the cover to the housing body.

[0013] When a rapid overpressure occurs inside the housing, none of the known solutions provide an opening large enough for pressure relief quickly enough, and at the same time, neither meet the above-mentioned requirements regarding the mechanical properties of the housing suitable for electrical equipment that converts particularly large amounts of power, nor simplify the assembly of the electrical equipment and enable access to the interior. SUMMARY OF THE INVENTION

[0014] Object of the present invention The present invention aims to provide a housing for an electrical device that has a locking system that simplifies the opening and closing of the housing of the electrical device, enhances safety by withstanding the normal environment, use, and fault conditions of such a device, and enables easy assembly and access to the interior.

[0015] Solution means This object is achieved by a device having the features of independent claim 1. Preferred embodiments are defined in the dependent claims.

[0016] Description of the present invention The housing of an electrical device for converting power comprises a body having a rear wall and side walls, and a cover. The cover closes the body to form a closed interior space. The electrical and electronic components of the electrical device are arranged in the interior space of the housing. The cover is connected to the body by a removable cover closure. The cover closure includes fixing means and a closure housing, characterized in that the fixing means are held rotatably and non-displaceably axially in the closure housing. Further, the closure housing is fixed to the cover at the geometric center of the cover. The body comprises a pin extending from the rear wall of the housing to the geometric center of the cover. The connection between the cover and the pin is releasable by rotating the fixing means and is established by at least one guide peg of the pin and at least one guide groove that at least partially spirally encircles the fixing means.

[0017] The object of the present invention is achieved in that the electrical device has a closed housing as a protective device, and the removably attached cover of the housing is designed as environmental protection incorporating overpressure protection. The fixed quick-release fastener in the center of the cover facilitates the opening and closing of the cover and improves the accessibility to the interior. When a rapid overpressure occurs, the entire surface around the central cover fastener functions as the working surface for pressure peaks and pressure pulses. The deformation of the cover is prevented only by its rigidity. The cover can be designed such that only the edge portion is slightly lifted from the housing to release the pressure peak. For this reason, the cover functions as an overpressure protection device and enables sufficient pressure relief. At the same time, the cover is held in place by the central fixing element, further preventing parts that may come loose from the interior of the electrical device and acting at least to deflect them laterally. In this regard, the cover protects the surroundings of the electrical device from pressure waves and minimizes the risk to people.

[0018] In particular, the cover is attached to the pins of the body only by the centrally arranged cover closure and is not connected to the body by other fixing means. It should be understood that a weak connection between the cover and the housing, such as the adhesive force of the seal at the edge where the cover contacts the side wall, or a slight inclination or guide hook, is not considered a fixing means. Furthermore, the centrally arranged pin fixed to the rear side of the body provides optimal access to the internal space of the housing when the cover is open. Since the rotational fixing means of the cover closure are held within the closure housing, there are no loose parts in the closure throughout the assembly or disassembly of the housing, provided that it is guaranteed that the cover can be centered, positioned, and connected to the housing in one step. This provides a quick-release fastener attached to the cover in a solid state, enabling compression of the seal, retention of the cover during internal faults, and easy positioning of the cover.

[0019] When the cover is placed on the housing, the central pin is inserted into the fixing means, where the fixing means is held rotatably and non - axially movable within the closure housing. Preferably, the pin is cylindrical and the fixing means is a corresponding hollow cylinder for receiving the pin. When the fixing means is in the central position for receiving the pin, the cover is also automatically brought to the correct mounting position with respect to the housing. When inserting the pin into the fixing means, the outward - facing guide peg of the pin is placed in the guide groove of the fixing means. Since this guide groove is at least partially designed in a spiral shape, during the corresponding rotational movement, the fixing means is drawn towards the pin, thereby drawing the entire cover towards the housing as well. The dimensions of the pin and the fixing means are adjusted such that the cover is firmly installed on the housing at a preset end position to close the housing, and its connection part can withstand the pressure generated inside in case of failure. Further, since the cover closure is centrally located, there is substantially free access to the areas of the corners and edges of the housing, and these areas can particularly include the connection areas of the electrical equipment. This connection area is substantially freely accessible when the cover is open, so that no additional assembly work is required when the device is in the operating state.

[0020] In a preferred embodiment, a removable connection can be established with a half - turn or a quarter - turn. Such a closure can be easily released by rotating it 90 degrees or 180 degrees using a suitable tool. In particular, the cover closure can be moved in a simple and clear manner by rotating it from the locked closed position to the free open position where the cover closure is released from the locking pin and the cover can be removed from the housing.

[0021] The locking pin preferably has, at its upper end facing the cover, a cross peg as a guide peg. Accordingly, the fixing means comprises a spirally wound helical groove consisting of two guide grooves for receiving both ends of the cross peg. Due to this symmetry, the mounting position is more clearly defined and jamming is prevented when the cross peg moves within the spiral. In a further advantageous embodiment, the guide groove has a latch at the end position. This defines a locked closed position when the guide peg is held within the latch. Thus, it is possible to prevent the guide peg from slipping back accidentally into the guide groove and to prevent the cover from becoming loose.

[0022] In an advantageous embodiment, a collar is provided on the closure housing and forms a stop surface for the cover. This collar defines the mounting state of the closure housing on the cover. The closure housing preferably projects through the central opening of the cover and is arranged such that the collar is located outside the cover, while the fixing means acts on the cover from the inside, for example by means of a lock nut. Particularly preferably, a first sealing ring is arranged in the collar for sealing between the cover and the closure housing. Even more preferably, a second seal is formed between the fixing means and the closure housing, for example by a sealing ring extending around the fixing means. The entire cover structure with the fixing means and the seal mounted in the center is selected such that the electrical equipment can operate permanently and safely under all weather conditions and with all electrical parameters.

[0023] In an advantageous embodiment, the fixing means is fixedly held in the closure housing such that the fixing means includes a circumferential locking groove and the closure housing includes a locking pin for engaging the locking groove, whereby the fixing means is held rotatably and axially non-displaceable within the closure housing. The locking groove preferably extends only partially in the circumferential direction, thereby restricting the rotational movement of the fixing means within the closure housing. Alternatively, the locking groove can accommodate a snap ring, thereby preventing axial displacement of the fixing means at the intended mounting position and ensuring that the snap ring does not get lost. The restriction of the rotational movement of the fixing means can also be achieved by providing an additional recess in the fixing means that engages a corresponding protrusion within the closure housing.

[0024] To more clearly define the mounting position of the cover and to facilitate insertion of the cross peg of the pin into the spiral groove of the fixing means, the closure housing can include an axial guide groove in the end region facing the pin, through which the guide peg of the pin can be guided into the spiral circumferential guide groove of the fixing means. Further, a cone opening towards the cover can be arranged around the end region of the pin, thereby further facilitating the centering during assembly of the cover.

[0025] Particularly preferably, the closure of the cover is provided with markings indicating the mounting position and / or markings indicating the open and closed positions. This is preferably achieved by visually recognizable indicators, which can be formed, for example, by various colors or various symbols.

[0026] In one embodiment of the housing, the cover has a sealing surface that extends substantially in one plane. The cover is placed with the sealing surface in contact with the edge of the side wall of the body. The side wall, needless to say, may be formed of a single component, and in this regard, the housing having a circular rear wall and a corresponding continuous side wall is also included. A circumferential seal can be arranged between the edge of the side wall of the body and the cover. Since pressure is applied to the seal by the cover closure through the cover, the housing can be firmly closed. As a result, the protection class inside the housing is guaranteed to be at least IP54, preferably at least IP65 and / or NEMA type 4X protection class.

[0027] The entire cover structure with the fixing means and the seal attached in the center is selected so that the electrical equipment can operate permanently and safely under all weather conditions and for all electrical parameters. For this purpose, the cover is designed to have sufficient rigidity to transmit the contact force from the central cover closure through the cover surface to the edge and then to the seal so that the seal receives the required compression force. At the same time, the cover has an optimized rigidity so that it can deform around the entire circumference of the screw attached in the center when a specific internal pressure is reached. Thereby, an opening area optimized for releasing the pressure is formed, and the pressure escapes slowly. Furthermore, since the overall load on the cover closure during an explosion is reduced, the cover is not torn by the cover closure.

[0028] The housing according to the invention can particularly advantageously accommodate power electronics components therein. For this purpose, in particular, switches, capacitors and / or inductors suitable for converting electrical power within the device are included. In particular, the housing can accommodate a power converter, in particular a rectifier, an inverter and / or a DC / DC converter. In particular, in the field of power converters with a rated power in the range of several tens to several hundreds of kilowatts, with the progress of technology, the power density increases, and at the same time, the above-mentioned problem of undesirable energy accumulation deteriorates, so a housing that can cope with the correspondingly increasing risk is required.

[0029] When overpressure occurs inside the housing, especially when a sudden overpressure such as that which can occur in high-power electrical equipment occurs, the cover can separate from the edges of the side walls on all sides and may undergo plastic deformation. As a result, the pressure decreases in all directions. Furthermore, since the surface area on which the overpressure acts decreases due to the deformation of the cover, the pressure applied to the cover closure is also relieved by the plastic deformation. Due to the rapid pressure drop, the tensile force acting on the cover closure rapidly decreases. Since the overpressure is also relieved by the elastic deformation of the cover, during overpressure, the cover lifts from the side wall, releases the pressure relief opening, and closes again after the pressure is relieved.

Brief Description of the Drawings

[0030] Hereinafter, the present invention will be further described and described with reference to the exemplary embodiments shown in the drawings.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

DETAILED DESCRIPTION OF THE INVENTION

[0031] Figure 1 shows a cover closure according to the present invention. The housing (not shown) includes a body. The body is integrally formed, for example, as a die-cast part, or is composed of a plurality of parts, in particular a rear wall and side walls. In principle, the body can have a substantially rectangular layout including four substantially flat side walls, or a circular or oval layout basically including one circumferential side wall.

[0032] The housing is provided with a cover. The body and the cover form a closed interior of the housing, and the cover is arranged to fit precisely to the edge of the side wall of the body. Any opening provided in the side wall and / or rear wall of the body, for example, an opening for a cable duct, can be provided with a suitable seal.

[0033] The cover is removably connected to the main body by a central cover closure. According to FIG. 1, the cover closure includes a closure housing 11 that is fixed to a cover (not shown) by a collar 12 designed as a stop surface and a lock nut 13 that also functions as a ground nut. The closure housing 11 basically has a rotationally symmetric or cylindrical basic shape. An outer thread 14 is provided on the outer peripheral surface, and the lock nut 13 can be screwed onto it. To attach the closure housing 11 to the cover, the closure housing 11 is inserted into an opening of appropriate dimensions in the cover until the collar 12 abuts against the outside of the cover. Then, the closure housing 11 is fixed inside the cover with the lock nut 12. The opening of the cover is preferably located at the geometric center of the cover. The closure housing 11 is preferably designed as a hollow cylinder so as to accommodate the fixing means 15 (see FIG. 2). Also, the fixing means 15 is preferably designed as a hollow cylinder so as to fit into the cavity of the closure housing 11, and preferably, the fixing means 15 can be inserted into the closure housing 11 from the outside of the cover. The fixing means 15 is rotatable in the axial direction but is held inside the closure housing 11 in a constrained state, that is, a state where it cannot be displaced in the axial direction. To form a closed connection between the cover and the main body of the housing, a preferably rod-shaped closing pin 16 is provided, and this pin extends from the rear wall of the housing to the opening of the cover. At the end of the pin 16 facing the cover, cross pegs 17 that extend radially outward on both sides of the pin 16 are provided. The cross pegs 17 are usually composed of pegs that fit the pin 16 and are inserted through a bore centered and aligned. The pin 16 with the cross pegs 17 is part of the rear wall of the housing and is firmly attached thereto, and the rear wall of the housing can also include additional structural reinforcement in this area to sufficiently withstand the tensile force acting thereon. The pin 16 with the cross pegs 17 is dimensioned to be inserted into and accommodated by the fixing means 15.

[0034] Figure 2 shows an exploded view of the cover-side closure components. Similar to Figure 1, a closure housing 11 having a lock nut 13 and a fixing means 15 are shown. The closure housing 11 has a collar 12 which, as described above, functions as a stop surface against the outside of the cover. A seal 18 is arranged on the collar 12 to seal the closure housing 11 against the cover during installation, thereby protecting the interior from environmental influences such as moisture and dust. This seal 18 can be designed in a known manner, for example as a rubber seal ring or foam beads. The fixing means 15 includes a receptacle 19 for a closure pin 16, the inner diameter of which is adapted to the outer diameter of the closure pin 16. Further, the fixing means 15 includes a spiral groove consisting of two spirally winding guide grooves 20. These guide grooves 20 are designed to receive the cross peg 17 of the pin 16. In the illustrated embodiment, the guide grooves 20 penetrate the shell of the fixing means 15. However, it is also conceivable that the shell of the fixing means 15 is closed and the guide grooves 20 are formed only internally. However, from a manufacturing perspective, the fully penetrating guide grooves 20 are much easier to implement. In the first region of the receptacle 19, the guide grooves 20 may be axially aligned rather than spiral. This facilitates the insertion of the cross peg 17 and the correct positioning of the entire cover. Also, the closure housing 11 can be provided with a guide section 21 corresponding to its end facing the pin 16. The sealing of the fixing means 15 against the closure housing 11 can be achieved by an additional seal 22 arranged in the circumferential seal groove 23 of the fixing means 15 in the assembled state. By incorporating the seals 18, 22 into the cover closure permanently attached to the cover, it is ensured that airtightness is not lost even when the cover is disassembled and reassembled on the housing body, eliminating the need to use a new seal each time. A lock pin 24 is pushed into the closure housing 11 to axially fix the fixing means 15, and the lock pin engages with a semi-circular lock groove 25 of the fixing means 15. Thereby, the fixing means 15 is fixed so as not to fall off, and at the same time, a rotation limit (in this case, a half rotation) is established.However, this can also be achieved by other methods. For example, the locking groove 25 of the fixing means 15 can be in a complete circular shape to accommodate the snap ring 26, and the snap ring enters the corresponding locking groove of the closure housing 11 at an appropriate position. The axial fixation and the positions of the seals 18, 22 can be confirmed in the cross-sectional view of FIG. 3, which shows the closure housing 11 with the fixing means 15 accommodated therein.

[0035] FIG. 4 shows the state of assembling the closure housing 11 on the cover 27. The closure housing 11 is attached to the central opening of the cover 27 by the stop surface of the collar 12 and the lock nut 13 which also functions as a gland nut. Preferably, the cover opening is not circular, for example, a square with rounded corners. Preferably, a flat portion 28 conforming to the opening is provided on the outer surface of the closure housing 11, whereby the closure housing 11 can be firmly fixed in the rotational direction. Thereby, the cover closure can be accurately aligned with the cross peg 17 of the pin 16.

[0036] Figure 5 shows a preferred embodiment in which various markings are provided on the closure housing 11. The two markings 29 on both sides are provided for accurately positioning the cover closure on the central pin. They can be formed, for example, by color markings or structural markings (protrusions, notches, etc.). These markings 29 are intended to ensure correct installation. In the case of the central cover closure, the pin 16 needs to be installed such that the cross peg 17 is in a horizontal position. Thereafter, the closure housing 11 needs to be installed such that the side markings 29 are also horizontal. This facilitates the positioning and attachment of the cover, particularly in the case of a multi-symmetric or circular housing shape. Further, in Figure 5, the triangular marking 30 indicates the upward or downward attachment direction, which is determined by which is preferred for the "open" and "closed" positions. The rotational direction can be indicated by additional markings. For example, in the illustrated embodiment, the arrow and the letter indicate the rotational direction of the open position (O) and the closed position (C of "closed"). Further, the color marking 31 on the closure housing enables an optical position indication. For example, in the closed position (lower side of Figure 5), the visible part of the color marking is displayed in green, and when the central fixing means 15 is rotated half a turn, it is displayed in red in the open position (upper side of Figure 5).

[0037] Figure 6 shows the function of the cover closure, demonstrating the interaction between the fixing means 15 and the locking pin 16 when closing the cover. The left side shows the state with the cover placed on, the center shows the state with the cover half-closed, and the right side shows the state with the cover closed. The fixing means 15 is configured such that rotational motion is converted into translational motion. For this purpose, double-sided spiral grooves 20 are introduced into the fixing means 15. This represents the movement path where the cross peg 17 engages. When the actuator 32 is rotated, the cover connected to the closure moves downward. The distance of movement in a direction perpendicular to the cover plane needs to be sufficient to compress the seal and compensate for the deformation of the cover. Due to the central insertion, this force can become quite large even for medium-sized covers, so it is preferable to set the path to a 180° rotation. To enable the same vertical movement of the cover, for example, with a 1 / 4 rotation, the rotational distance is halved, but twice the force is required. When a larger compression path is required, such as when the seal becomes larger, the path can also be increased. This corresponds to a "stretched" spiral. However, in that case, it is necessary to consider that the starting angle becomes steep, so the operating force increases again. Specific rotation angles from 90° to 180° can also be achieved, and the compression path can be specifically adjusted within certain limits. This system can also be extended in size. Both right-closed and left-closed variations are possible. In the case of a central-closed solution, the required closing force depends greatly on the size of the cover and the required compression force of the seal. When the cover is small, a 1 / 4 rotation may be sufficient. When the cover is large, the inlet path becomes longer with a half rotation, and the closing force becomes lower. At the end of the track, latches 33 are provided on both sides, here in the form of recesses in the track. The cross peg 17 reaches its end position there and is securely held by the tension applied by the cover and the seal. In the event of an explosion, the cover must be securely held to the main body of the housing by the cover closure.

Description of Reference Numerals

[0038] 11 Closure housing 12 Collar 13 Lock nut 14 Outer screw 15 Fixing means 16 Pin 17 Guide peg / Cross peg 18 First seal (collar) 19 Receptacle 20 Guide groove 21 Guide section of the closure housing 22 Second seal (inner) 23 Seal groove 24 Lock pin 25 Lock groove 26 Snap ring 27 Cover 28 Flat part 29 Position marking of the mounting position 30 Position marking of the mounting direction 31 Color marking 32 Actuator 33 Latch

Claims

1. A housing for an electrical device for converting electrical power, the housing comprising a body having a rear wall and side walls, and a cover (27), the cover (27) closing the body to form a self - contained internal space, electrical and electronic components of the electrical device being arranged in the internal space of the housing, the cover (27) being removably connected to the body by a cover closure, the cover closure including fixing means (15) and a closure housing (11), the fixing means (15) being rotatably and axially non - displaceably held within the closure housing (11), the closure housing (11) being fixed to the cover (27) at the geometric center of the cover, the body including a pin (16) extending from the rear wall of the housing to the geometric center of the cover (27), the connection between the cover (27) and the pin (16) being releasable by rotating the fixing means (15), and being establishable by at least one guide peg (17) of the pin (16) and at least one guide groove (20) that at least partially spirally encircles the fixing means (15). A housing characterized by this.

2. In the housing according to claim 1, the removable connection between the cover (27) and the pin (16) being establishable by a half - turn or a quarter - turn. A housing characterized by this.

3. In the housing according to claim 1 or 2, the pin (16) including a guide peg (17) designed as a cross - peg, the fixing means (15) including at least a partially spirally encircling spiral groove consisting of two guide grooves (20) for receiving both ends of the cross - peg (17). A housing characterized by this.

4. In the housing according to any one of the preceding claims, the guide groove (20) including a latch (33) at the end position. A housing characterized by this.

5. In the housing according to any one of the preceding claims, the closure housing (11) including a collar (12) forming a stop surface for the cover, and a first seal (18) for sealing between the cover (27) and the closure housing (11) being arranged on the collar. A housing characterized by this.

6. In the housing according to claim 5, A second seal (22) for sealing between the fixing means (15) and the closure housing (11) is circumferentially arranged around the fixing means (15). The housing is characterized by this.

7. In the housing according to any one of the preceding claims, The fixing means (15) includes a circumferential locking groove (25), and the closure housing (11) includes a locking pin (24) for engaging with the locking groove (25). Thus, the fixing means (15) is rotatably and axially non-displaceably held within the closure housing (11). The housing is characterized by this.

8. In the housing according to claim 7, The locking groove (25) extends only over a circumferential part, thereby restricting the rotational movement of the fixing means (15) in the closure housing (11). The housing is characterized by this.

9. In the housing according to any one of claims 1 to 6, Each of the fixing means (15) and the closure housing (11) includes a circumferential locking groove (25) in which a snap ring (26) is arranged. Thus, the fixing means (15) is rotatably and axially non-displaceably held within the closure housing (11). The housing is characterized by this.

10. In the housing according to any one of the preceding claims, The closure housing (11) includes an axial guide groove (21) in an end region facing the pin (16) as means for defining an attachment position. Through this axial guide groove, the guide peg (17) of the pin (16) can be guided into a guide groove (20) that at least partially spirally winds around the fixing means (15). The housing is characterized by this.

11. In the housing according to claim 9, The cover closure is provided with markings indicating the attachment position and / or markings indicating the open position and the closed position. The housing is characterized by this.

12. In the housing according to claim 1, The cover (27) is attached to the body only by a centrally arranged cover closure and is not connected to the body by other fixing devices. The housing is characterized by this.

13. In the housing according to claim 1, The housing is characterized in that the cover (27) has a sealing surface extending substantially in one plane, and on this sealing surface, the cover (27) is placed on the edge of the side wall of the main body.

14. In the housing according to claim 12, a circumferential seal is arranged between the edge of the side wall of the main body and the cover (27), and a compressive force is applied thereto by the cover closure via the cover (27), whereby the housing is firmly closed so that the protection class inside the housing is guaranteed to be at least IP54, at least IP65 and / or NEMA type 4X.

15. In the housing according to any one of the preceding claims, the components inside the housing include power electronics components suitable for converting electric power in the device.

16. In the housing according to any one of the preceding claims, when overpressure occurs inside the housing, the cover (27) is designed to lift from the edge of the side wall on all sides and plastically deform to allow pressure reduction in all directions.

17. An electrical device comprising the housing according to any one of claims 1 to 16.

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