HK1146763B - Device for controlling a motor-driven switch drive for a switching device - Google Patents

Description

Device for controlling a motor-driven switching gear for a switching device

Technical Field

The invention relates to a device for controlling a motor-driven switching gear of a switchgear for an electrical distribution device, in particular for a three-position disconnector for a high-voltage or medium-voltage electrical distribution device.

Background

Such devices are known as motor-driven switching gears, such as surge gears, surge energy stores (sprangspeicherantiesb) or inching gears, for the electrical control of three-position disconnectors of electrical power distribution units. The device for controlling serves both for changing the switching device from the actual state and thus for controlling or switching it to the desired target state, and for locking and indicating. In this case, the devices for electrical control usually comprise a control unit with electronic, electromechanical (elektromechanical) and/or electromagnetic components, such as auxiliary contactors, time relays, bridge rectifiers and end switches, which are mounted, for example, on a guide rail with a top cover (Hutschiene) or a plug-in module. Furthermore, the device comprises an electrical indicator unit, for example an auxiliary switch, by means of which faults, operating states, switchgear positions can be reported.

For connecting the electromechanical components and the auxiliary switch, a single conductor (Einzeladern) is usually provided, which is connected to the individual components and the auxiliary switch, if necessary via a flat plug and a conductor terminal (adertenhuelsen). Such a single connection for the component and the auxiliary switch results in a plurality of different connections and wiring in one switch gear.

The functional check of the control device can thus only be carried out within the scope of the final check, i.e. within the scope of the assembled state of the device, since the switching mechanism and the control device as well as the control unit and the display unit within the control device are electrically and, if appropriate, spatially separated from one another, and an electrical connection enabling the functional check is established only via the final wiring (Endverdrahrung).

Disclosure of Invention

The object of the present invention is to provide a device for controlling a switching gear of a switching device for an electrical distribution device, which is of simple construction and in which the wiring complexity is significantly reduced.

The above-mentioned object is solved according to the invention by the features given in claim 1.

Preferred developments of the invention are the subject matter of the dependent claims.

In the device according to the invention for controlling a switching mechanism of a switchgear for an electrical distribution device, in particular a three-position disconnector for a high-voltage or medium-voltage distribution device, the control and/or indicator unit having at least one universal adapter element is designed as an integrated structural unit.

The basic idea of the invention is based on the following considerations: in order to reduce wiring, the control unit and the indicator unit are integrated into a compact and versatile and simply mountable structural unit. For this purpose, the indicator unit, the control unit and/or the adapter element are combined to form a structural unit. The adapter element serves both for the internal electrical connection and for fixing the display and/or control unit and for the external electrical connection. Thus, only external electrical connections need to be madeAnd (6) wiring. By combining the control and/or indicator unit with the adapter element as one structural unit, the functionality of the structural unit can be checked separately before connecting the external connectionIn particular checking control and/or indication functions. In a possible embodiment, the integrated structural unit can comprise only the indicating unit and the adapter element of the standardized connection to the prefabricated cable harness. In a further embodiment, the integrated structural unit comprises a control unit in addition to the indicating unit and the adapter element. Depending on the type and design of the switch gear, for example in the case of a manual operating mechanism, the device for controlling comprises only an integrated indicator unit and an adapter element fixed thereto. In a motor-driven switch gear, the device comprises an integrated control and indicator unit with an adapter element. The control unit is identical for all drive variants, i.e. the sudden mechanism, the sudden energy storage mechanism or the slow mechanism.

In one possible embodiment, the integrated control and/or indicator unit comprises a switching unit as an indicator unit or position indicator, on which at least two adapter elements for electrical disconnection are arranged. The switching unit is thus integrated in the structural unit for the control unit. One of the adapter elements is preferably used for accommodating the control unit. The other adapter element serves to accommodate at least one connecting element and is configured accordingly depending on the type and configuration of the connecting element. The respective adapter element preferably electrically separates the switching unit from the control unit and/or the switching unit from the connection unit.

In a particularly simple embodiment, the adapter element is designed as an electrically insulating carrier unit, in particular as a circuit board. The configuration of the adapter element as a circuit board makes it possible to integrate the control unit into an electronic circuit in a particularly simple manner. By constructing the carrier unit as a circuit board, the internal wiring of the control and/or indicator unit can be done beforehand. For this purpose, the circuit board preferably has conductor tracks on both sides. The current-carrying capacity of the conductor tracks is designed to be the same as the contacts of the switching unit.

Preferably, the control unit is mounted as an integrated circuit and/or an electronic circuit and/or an electromechanical circuit on the carrier unit. This results in a particularly compact structural unit, in which the conventional single-core line and the resulting high wiring complexity for the control unit are reliably avoided by the connecting lines provided on the carrier unit for connecting the components of the control unit.

The control unit may be variously configured according to the structure and function of the switching device. The control unit suitably comprises two separate power supply connections for supplying power to the unit arranged in the load circuit and the unit arranged in the control circuit. For example, if the H-bridge circuit for controlling the steering of the electric motor is dimensioned by means of corresponding switching transistors such that the switching power supply is no longer required, the switching power supply can be dispensed with for supplying the load circuit. In this case, the voltage of the drive motor of the holding switch gear mechanism is deformed. The two supply connections and the corresponding voltage supplies are separated from one another in the control unit and are secured externally, for example, in a separate manner. The supply for the control circuit and the load circuit is carried out over a wide voltage range for voltages with a dc voltage of 24V, 48V, 60V, 110V, 220V or an ac voltage of 110V, 230V. An internal voltage supply to the control unit is generated from the control voltage of the switching device by an internal switching power supply, for example, with a dc voltage of 12V.

In the event of a failure of one of the supply connections, a failure indication is output, for example if an internal response (rickmeldung) by the switching unit (i.e. the auxiliary switch) is not carried out within a predetermined time depending on the kind of drive motor. Here, for the inching mechanism, the drive motor outputs a fault indication after about 8s and for the snap-action mechanism or the snap-action energy storage mechanism, the drive motor outputs a fault indication after about 8 s. Furthermore, the drive motor of the switching gear train is switched off by means of the control unit and remains stationary. In addition, the locking of the superordinate operating device, for example a three-position disconnector or a circuit breaker, is maintained. The drive motor is not allowed to automatically restart without command input in the event of voltage recovery.

In a further embodiment, the control unit locks or disables the corresponding switching device, for example a three-position disconnector, circuit breaker, grounding switch, in the event of the occurrence of predeterminable information.

The connecting element is preferably designed as a plug connector. The connection to the control and/or display unit can thus be made via a prefabricated pluggable cable harness, so that no further wiring work is required, since the internal wiring of the control and/or display unit is made via a prefabricated carrier unit of the adapter element, which carrier unit is designed as a circuit board.

The switch unit is suitably designed as an auxiliary switch with a predetermined number of contact strips (schaltereben). Depending on the construction of the corresponding switching device, the auxiliary switch can be an 8-or 14-piece auxiliary switch with 6 or 12 freely available contact pieces for the normally open contact function and the normally closed contact function. Depending on the configuration of the auxiliary switch, the corresponding plug connector or connecting plug is implemented as a2 × 22-pole plug connector in the case of an 8-piece auxiliary switch and as a2 × 22-pole and a2 × 10-pole plug connector in the case of a 14-piece auxiliary switch, for example.

The advantages achieved with the invention are in particular that, by the integrated design of the combined control and/or indicator unit with prefabricated adapter elements which allow internal wiring, a motor control is provided which is simple to produce and can be checked as a module and which at the same time has a compact design. Individual wiring with high expenditure is reliably avoided. The control unit is separated from the display unit with the auxiliary switch by an adapter element.

Drawings

The embodiments of the present invention are explained in detail below with reference to the drawings. Herein, in the drawings:

figure 1 shows schematically in a side view an embodiment of a control and/or indicator unit configured as an integration with an adapter element in the assembled state,

fig. 2 shows an embodiment of an integrated structural unit in exploded and longitudinal view, with a control unit that can be placed on top of a centrally arranged 8-piece auxiliary switch,

figure 3 schematically shows the integrated structural unit according to figure 2 in a top view of the control unit arranged on top of the auxiliary switch,

fig. 4 shows schematically an embodiment of an integrated construction unit in a longitudinal view, with a control unit arranged on top of a centrally arranged 14-piece auxiliary switch,

figure 5 schematically shows the integrated structural unit according to figure 4 in a top view of the control unit arranged on top of the auxiliary switch,

fig. 6 schematically shows an embodiment of the control unit with corresponding joints, an

Fig. 7 schematically shows an embodiment of the circuit configuration of the control unit with corresponding connections.

Mutually corresponding parts have the same reference numerals in all figures.

Detailed Description

Fig. 1 schematically shows an exemplary embodiment of a control and/or display unit 1 designed as an integrated structural unit. The control and/or indicator unit 1 serves to control the switching gear of a switching device, here a high-voltage or medium-voltage distribution device with three switching poles, for example a three-position disconnector.

As a central component, the control and indicator unit 1 comprises a switch unit 2 configured as an auxiliary switch. The switching unit 2 is used here for responding to the operating position of the switching device. The switching unit 2 may comprise contact plates (schaltereben) and generate operating position indicators.

Depending on the function and design of the switching device, which can be switched by the control and/or display unit 1 and the switching gear, a corresponding number of universal adapter elements 3.1 to 3.n can be provided, in particular plugged, onto the switching unit 2. The adapter elements 3.1 to 3.n are suitably designed as electrically insulating carrier units, which are preferably designed as circuit boards with conductor tracks on one or both sides for the purpose of prefabricating the internal wiring of the control and/or indicator unit 1. In this case, the adapter elements 3.1 to 3.n can be arranged on the switching unit 2 such that their contacts make electrical contact with the conductor tracks of the adapter elements 3.1 to 3. n. For example, the adapter elements 3.1 to 3.n each have a contact receptacle (Buchsenleisten) into which a plug (Stfte) or a plug (stifleisen) of the switching unit 2 engages.

For controlling or checking the contacts of the (abbragage) switching unit 2, the adapter elements 3.1 to 3.n are correspondingly designed. For example, one of the adapter elements 3.1 to 3.n is an adapter element 3.1 with a control unit 4 arranged on top of the switch unit 2, which control unit is mounted on the adapter element 3.1 as an integrated and/or electronic circuit with electromechanical, electromagnetic and electronic components. The components of the control unit 4 are connected to one another by the printed conductors of the circuit board, so that the control unit 4 for the switching gear and the switching device can also be prefabricated. In this way, the functionality of the prefabricated control unit 4 can be checked in a simple manner before final assembly. In an alternative embodiment, the control unit can also be provided on a separate circuit board and can then be plugged to the corresponding adapter element 3.1 via a socket-plug connection.

Depending on the type and configuration of the switch gear, the device 1 includes only the switch gear 2 (auxiliary switch) and the adapter elements 3.1 to 3.3 to the cable connections in the manual drive. In a three-position disconnector with motor drive, the device 1 additionally comprises a control unit 4 fitted. In this case, the device 1 for manual driving can be converted in a simple manner into a device for motor driving by plugging in the control unit 4.

In the present exemplary embodiment, the other adapter elements 3.2 to 3.3 serve to accommodate a connecting element 5, which can be designed, for example, as a plug connector or a connecting plug to accommodate a prefabricated cable harness, which can be simply inserted into the connecting element 5. The number of terminal poles of the individual connecting elements 5 is variable depending on the type and construction and function of the switching gear and of the corresponding switching device.

Fig. 2 shows schematically in an exploded view and in a longitudinal view the integrated structural unit according to fig. 1 with an adapter element 3.1 with a control unit 4 which can be placed on top of the centrally arranged switching unit 2. The switching unit 2 is implemented in this embodiment as an 8-piece auxiliary switch. The control units 4 (i.e. their components, e.g. active and passive electrical components, H-bridge circuit 9, relays) are mounted on both sides of the corresponding adapter element 3.1. In this case, particularly high components (for example capacitors 6) are arranged on the side of the printed circuit board facing the switching unit 2. Depending on the design of the switching unit 2, the capacitor 6 can be inserted into the recess 7 of the switching unit 2. Furthermore, the adapter element 3.1 can be detachably connected in a suitable mannerFixed to the switching unit 2, for example inserted, clipped in or screwed in.

Fig. 3 shows a schematic top view of the integrated structural unit according to fig. 2, viewed from the adapter element 3.1 with the control unit 4 arranged on top of the auxiliary switch. The adapter element 3.1 is embodied here as a circuit board: it has a recess 8 in the region of the switching unit 2, so that the switching unit 2 can be freely reached from the top, and is at least partially inserted into the recess 8 and is located on the adapter element 3.1 with a form fit (formschlussig). The adapter element 3.1 is thereby fixed to the switch unit 2 in a simple manner.

The control unit 4 is mounted, for example, as an integrated circuit on the side of the circuit board and thus of the adapter element 3.1 facing away from the switching unit 2. Depending on the requirements, the control unit 4 is arranged on the adapter element 3.1 on the side of the switching unit 2. In order to implement the overall length of the integrated assembly in a compact manner, in an alternative embodiment, which is not illustrated in detail, the assembly of the control unit 4 can also be mounted on the side of the switching unit 2 on the side of the adapter element 3.1 facing the switching unit 2. It is also possible to arrange a particularly tall component of the control unit 4 (for example the capacitor 6) on the side of the adapter element 3.1 facing the switching unit 2 in such a way that it is arranged laterally next to the switching unit 2 or is inserted into the recess 7 of the switching unit 2.

Fig. 4 shows a schematic longitudinal view of an exemplary embodiment of an integrated structural unit with a centrally arranged 14-piece auxiliary switch as a switching unit 2, on top of which an adapter element 3.1 with a control unit 4 is arranged. In the configuration of the switching unit 2 as a 14-piece auxiliary switch, a plurality of connecting elements 5 of different pole numbers are laterally arranged on the respective adapter elements 3.2 and 3.3. For example, each connection element 5 has a2 × 22-pole connection plug and a2 × 10-pole connection plug.

Fig. 5 shows schematically a top view of the integrated structural unit according to fig. 4, seen from the adapter element 3.1 with the control unit 4 arranged on top of the auxiliary switch. Here, the control unit 4 may be differently or identically configured according to the kind and structure and function of the switch unit 2. The adapter element 3.1 encompasses the switching unit 2 in a U-shaped manner, so that the adapter element 3.1 can also be pushed or placed laterally onto the switching unit 2, instead of being plugged on at the top as in fig. 4.

Fig. 6 schematically shows an embodiment of the control unit 4 with corresponding connections a1 to Am. The terminals a1 to a2 are power supply terminals and are hereinafter referred to as power supply terminals a1 and a 2. The supply connection a1 is used to supply power to a unit, not shown in detail, which is arranged in the control circuit SK, and the supply connection a2 is used to supply power to a unit which is arranged in the load circuit. The connection a3 is used to control the motor direction of the drive motor M of the switching gear. The terminal a4 is a binary input, for example a latching terminal, in particular a floating relay input/output to a higher-order operating device (for example "circuit breaker", "input of other latching devices"), or an enable for a switching process (schalthardlung) such as "isolator enable", "earthing enable" or "three-position disconnector enable when the circuit breaker is open". The junction a4 can switch different voltages from 24V DC to 220V DC (e.g. 48V DC, 60V DC, 110V DC, 220V DC) or 110V AC, 230V AC. Terminal a5 is a floating output, for example a binary indicator output, such as "fault notification", "blocking breaker", "blocking superordinate operating device", "service and programming interface", "self-monitoring (watchdog)". Connector a6 is a further binary input with a voltage from 24V DC to 220V DC and 110VAC, 230V AC, for example a binary command input such as "isolator on", "isolator off", "ground on", "ground off" and an internal response of the operating device such as the response of the contact pad of the auxiliary switch "isolator on", "isolator and ground off" and "ground on".

In this case, the control of the control voltage 4 is arranged such that, in the event of a failure of one supply connection a1 or a2 during the operation of the drive motor M, the latter is stopped and the blocking of the higher-order operating device (for example, a circuit breaker) can be switched via the connection a5 and thus remains normal. If the drive motor M is not activated when a command is input through one of the connections a6, the relevant command is not stored because it is not executed. For example, in the case of a restoration of the supply voltage for one of the circuits LK, SK to be supplied, the drive motor M is not automatically started without a new command input. Further, if the auxiliary switch does not respond through one of the terminals a6 within a predetermined time after the command for switching is input, a failure indication or an error indication is output and the drive motor is turned off. For example, the response time that can be predetermined for a three-position switch slow-motion mechanism is approximately 8s, and for a snap-action mechanism/snap-action energy storage mechanism is also approximately 8 s.

In a possible embodiment, for the purpose of hardware control, i.e. for controlling the operating device (for example a circuit breaker or a three-position disconnector), the control unit 4 comprises: at least four command inputs via external keys, at least three response inputs of the internal auxiliary switches of the switching unit 2, a control input for the circuit breaker (control active in case of high signal if the circuit breaker is switched off, control unit 4 allows switching), a control output for the circuit breaker, at least one blocking output, at least one standby connection, a reverse rotation connection and two floating relay outputs.

The control implemented in the form of an algorithm includes at least the following latch-up conditions:

-controlling the "three-position disconnector" inactive (inactiv) if the circuit breaker is on and the internal power supply is off;

-if the "three-position disconnector" is set to run manually, controlling the "three-position disconnector" to be inactive;

-controlling the back-locking of the circuit breaker if

The command for changing the operating state of the three-position disconnector is given in advance.

The three-position disconnector is in operation and has not yet reached the final position.

Control of the "three-position disconnector" is rendered ineffective, for example, due to external blocking conditions such as the fuse being triggered, gas loss.

Fig. 7 schematically shows an embodiment of the circuit configuration of the control unit 4 with corresponding connections a1 to a 6. The control unit 4 comprises an H-bridge circuit 9 and a microprocessor 10 and various control modules 11 to 13 for controlling and checking analog blocking, binary response and binary input and output. In order to switch on and off the supply voltages for the control circuit SK and the load circuit LK, switching elements 14 and 15 are provided. Approximately 1.5s after the completion of the last command and the response by the auxiliary switch, the control unit 4 automatically switches off (abscalante) if no new command is pending (ansechen). In order to monitor the supply of the H-bridge circuit 9 and the switching elements 14, 15 and the connection a6 for command input, a monitoring module 16 is provided, which is connected to the microprocessor 10. Depending on the kind of voltage supply, i.e. the direct or alternating voltage, a corresponding voltage converter 17, 18, in particular an AC/DC converter or a DC/DC converter, is provided between the H-bridge circuit 9 and the respective circuit to be supplied (control circuit SK and load circuit LK).

List of reference numerals

1 control and indication unit

2 switch unit

3.1 to 3.2 adapter element

4 control unit

5 connecting element

6 capacitor

7 gap

8 grooves

9 bridge circuit

10 microprocessor

11-13 control module

14, 15 switching element

16 monitoring module

17, 18 voltage converter

A1 to Am linker

A1, A2 power supply connector

A3 to A6 linker

LK load circuit

M drive motor

SK control circuit

Claims (10)

1. An arrangement for controlling a switching gear mechanism for a switching device, wherein a control and display unit (1) having at least one universal adapter element (3.1 to 3.n) is designed as an integrated structural unit, characterized in that the control and display unit comprises a switching unit (2) for responding to an operating position of the switching device, and in that the adapter element is arranged on the switching unit in such a way that contacts of the switching unit are in electrical contact with conductor tracks of the adapter element.

2. The device according to claim 1, wherein the integrated control and indication unit (1) comprises the switch unit (2) as a position indicator, on which at least two adapter elements (3.1 to 3.n) are provided, one for accommodating the control unit (4) and the other for accommodating at least one connection element (5).

3. The device according to claim 1, wherein the adapter element (3.1 to 3.n) is configured as a carrying unit.

4. The device according to claim 2, wherein the control unit (4) is mounted onto the adapter elements (3.1 to 3.n) as an integrated circuit and/or an electromechanical circuit.

5. The device according to claim 2, wherein the control unit (4) comprises two separate power supply connections (a1, a2) for supplying power to units arranged in the load circuit and units arranged in the control circuit.

6. The device according to claim 5, wherein in case of failure of one power supply connection (A1, A2), the switching gear can be opened and the corresponding switching device can be latched by means of the control unit (4).

7. The device according to claim 2, wherein the control unit (4) locks or disables the corresponding switching device in the event of predeterminable information.

8. The device according to claim 2, wherein the connecting element (5) is configured as a plug connector.

9. The device according to any one of claims 2 to 4, wherein the switching unit (2) is configured as an auxiliary switch with a predetermined number of contact pieces.

10. The device according to claim 1, wherein the device is a device for a switch gear of a three-position disconnector for high-voltage or medium-voltage electric power distribution equipment.