JPH11299014A - Auxiliary switching circuit of switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the diameter of a conduit for cable wiring, make a cable wiring work easy and reduce the cost of a switchgear by a method, wherein the number of wires in a cable with which an operating unit and a controller which are attached to each main part device such as a disconnector are connected to each other is reduced. SOLUTION: 1st and 2nd contacts 33 and 34, which are provided in an operating unit 111 and connected to a link 31 connected to the operation mechanism of a disconnector via a drive mechanism 32, an auxiliary switch 2 which is provided in a controller 107 and has a plurality of contacts 213 and 223 and drive coils 211 and 221, which drive the contacts 213 and 223 via drive mechanisms 212 and 222 and a cable 121, with which the drive coils 211 and 221 of the auxiliary switch 2 are electrically connected to the 1st and 2nd contacts in the operating unit are provided. With this constitution, the number of contacts provided in the operating unit can be small, regardless of the number of contacts required by the controller.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for transmitting the on / off state of a switching device such as a circuit breaker or disconnecting switch constituting a switching device such as a gas insulated switching device (abbreviated to GIS) to a control device. The present invention relates to an auxiliary switch circuit provided.

[0002]

2. Description of the Related Art GIS is a device in which substation devices such as a circuit breaker and a disconnector are housed in a container in which an insulating gas is sealed, and are assembled together. FIG. 4 is a schematic elevation view of the GIS. In this figure, the substations constituting the GIS are housed in independent sealed containers, and are electrically connected to each other by leads that pass through connection pipes as appropriate. The reference numerals and names corresponding to the respective containers are the names of the substations housed in the containers.

[0003] Two buses, namely a busbar 101 and a busbar 102, are placed in the illustrated container in a three-phase 3
The conductors are housed and connected to the power system via disconnectors. The circuit breaker 103 is provided to cut off between the instep bus 101 and the second bus 102 to protect the system when a failure occurs in the power system connected to one of the buses. In the container in which the disconnector 104 is stored, a so-called disconnector that opens and closes a track and a grounding switch 105 (not shown) are stored. An instrument transformer 106 is housed in the rightmost container. The control device 107 also performs the function of controlling the entire GIS, such as controlling the ON / OFF of the switchgear, grasping the situation, and appropriately notifying the monitoring station.

In each device, for example, a circuit breaker 103
In the case of a device having a drive unit such as a movable contact of the above, in addition to the main body of each device, operating devices 111, 112, 11
3, 114 and 115 are provided, and auxiliary switches for informing the control device of the operation status from these operating devices are provided for each of them. On / off information of the auxiliary switches is indicated by thick lines and arrows in the figure. Cables 121, 12 shown
2, 123, 124, and 125 are transmitted to the control device 107 via wiring.

[0005] The auxiliary switch of each device is composed of a number of contacts that are turned on and off by a drive mechanism directly connected to the drive in the operating device. For example, in the case of a circuit breaker, information on whether the circuit breaker is on or off is displayed in a monitoring station remote from the GIS in addition to various controls in the control device 107 and input to a monitoring circuit for monitoring malfunction. It is used for various purposes such as signals. Therefore, the auxiliary switch is provided with a sufficient number of contacts to satisfy the required number. Depending on the application, the circuit breaker is turned on when the circuit breaker is on, and conversely, the circuit breaker is turned on when the circuit breaker is off. Contact. The wires coming out of the respective contacts are routed collectively through the pipes of the cables reaching the control device. Therefore, it is actually the case that 20 or more wires pass through one cable in FIG.

[0006]

SUMMARY OF THE INVENTION Cables 121 and 12
2, 123, 124, and 125 are routed to the control device 107 along the container surface of each main device. Therefore, when designing the container that houses the device,
It is necessary to consider such cable routing, but since the number of wires passing through the cable is large, the cable piping diameter is also large. This is a problem that hinders cost reduction. Furthermore, since the cable routing work is also difficult and requires a lot of man-hours, there is a problem that this point is also an obstacle to cost reduction. Further, since the auxiliary switch is housed in the operation device, the shape of the operation device is limited by this.

An object of the present invention is to solve such a problem, and to reduce the number of wires passing through the cable to reduce the cable diameter, facilitate the routing work, and reduce the operating cost by reducing the size of the operation device. It is to provide an auxiliary switch circuit of the device.

[0008]

According to the present invention, there is provided a switchgear auxiliary switch circuit for transmitting the operation status of a plurality of main units constituting a switchgear to a control unit. A contact provided in the operating device and connected to an operating mechanism to turn on and off, an auxiliary switch provided with a plurality of contacts provided in the control device and a drive coil for driving the contact, and driving of the auxiliary switch By configuring the wiring to electrically connect the coil and the contacts in the operation device of the main unit, the number of contacts provided in the operation device is minimized regardless of the number of contacts required by the control device. Since the number is sufficient, the number of wires for connecting the operation device and the control device can be minimized.

Further, the contacts in the operating device are the first contact and the second contact.
And the first and second contacts are arranged such that when one is on, the other is off, and the auxiliary switch comprises a first and a second drive coil, a first drive coil , A plurality of first contacts that are turned on when the second drive coil is driven, and a plurality of second contacts that are turned on when the second drive coil is driven. And the second drive coil is driven when the second contact in the operation device of the main body device is on. Can be specifically configured.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments. FIG. 1 is a circuit diagram of an auxiliary switch according to an embodiment of the present invention and peripheral circuits thereof. The same components as those in FIG. 4 are denoted by the same reference numerals. Further, FIG. 4 shows a large number of operating devices and cables.
And a cable 121 to be drawn out therefrom are shown as representatives.

In FIG. 1, an auxiliary switch 2 provided in a control device 107 includes two drive coils 21.
1 and 221; drive mechanisms 212 and 222; and a contact 2 comprising a plurality of contacts that are turned on and off by the drive coils 211 and 221 and the drive mechanisms 212 and 222.
13 and 223 and wirings drawn out from these contacts 213 and 223 are composed of terminals 214 and 224 connected to external wirings not appearing in the figure.

The drive coils 211 and 221 are driven by the current supplied from the DC power supply 4 when the first contact 33 and the second contact 34 in the operation device 111 are turned on. The first and second contacts 33 and 34 are turned on and off by a link 31 and a drive mechanism 32 connected to a disconnecting switch operating mechanism (not shown). When the disconnecting switch is on, the first contact 33 is also turned on. , The second contact 34 is turned off, and conversely, when the disconnector is off, the first contact 33 is turned off.
Is turned off, and the second contact 34 is turned on. The figure shows the former state, in which the first contact 33 is turned on, so that a current flows through the drive coil 211 connected via the wiring in the cable 121, and the contact 213 is turned on. Since no current flows through the drive coil 221 connected to the second contact 34 via the wiring in the cable wiring 121, the contact 223 is off. That is,
The first contact 33 of the operation device 111 and the contact 213 of the auxiliary switch 2 have the same ON / OFF, and the second contact 34 and the contact 2
23 have the same on / off.

The wires connected to the contacts 213 and 223 are connected to other devices in the control device 107 via terminals 214 and 224. Also, for example, using a latch mechanism,
When it is on, it is driven by the movable piece of the first drive coil, and it is mechanically locked by urging the spring. When the switch is turned off, the lock is released by the second drive coil and the lock is turned on. If the configuration is such that the drive is performed by the force of the spring that has been energized at the time of, the state can be prevented from changing when the power supply for the drive coil is lost. Further, a configuration using only one drive coil having a structure capable of obtaining an operation force in two directions instead of the two drive coils 211 and 221 may be adopted.

FIG. 2 is a plan view of the auxiliary switch of FIG.
Is an elevational view, which shows a specific configuration example of the auxiliary switch 2 in FIG. 1. Components that are functionally the same as those in FIG. 1 are denoted by the same reference numerals, and redundant description is omitted. Drive coil 21
1 and 221 are provided to face each other,
The cam 43 attached to connect the movable pieces 41 and 42 moves left and right by moving the members 1 and 42 in the left and right direction in the figure, and accordingly, the arm 44 rotates and the rotating shaft 45 rotates. Rotate right or left.

The rotating shaft 45 is connected to the contact device 40 in which the contacts 213 and 223 are housed. When the rotating shaft 45 rotates right in FIG. 3, the right contact 213 in the contact device 40 is turned on, and the left contact 213 in the contact device 40 is turned on. The contact 223 is set to be turned off, and conversely, when the counterclockwise rotation is performed, the contact 213 is turned off and the contact 223 is turned on. Of course, the reverse is also possible. The movable devices in the movable pieces 41 and 42, the cam 43, the arm 44, the rotating shaft 45, and the contact device 40 are the driving mechanisms 212 and 222 in FIG.
It corresponds to. Although the drive mechanisms 212 and 222 are shown as separate mechanisms in FIG. 1, they are represented in a functionally easy-to-understand manner, and the actual structure is integrated as shown in FIGS. Is also good. The contacts 213 and 223 in the contact device 40 are terminals 21 composed of many terminal fittings.
4,224, and is connected to an external circuit. The terminals 214 and 224 are usually actually called terminal blocks in this figure.

As can be seen from FIG. 1, no matter how many contacts 213 and 223 are actually required, the number of contacts in the operation device 111 may be two, and the number of wires in the cable 121 is also three. A book is fine. If the number of wires in the cable 121 is small, the diameter of the pipe that is the case of the cable 121 may be small, so that the cable itself is inexpensive and
The work of attaching this cable to the GIS container is also facilitated, which contributes to a reduction in man-hours.

[0017]

As described above, the present invention provides a plurality of contacts provided in an operation device provided for each main unit and turned on / off in connection with an operation mechanism, and a plurality of contacts provided in a control device. And an auxiliary switch having a driving coil for driving the contact, and a wiring for electrically connecting the driving coil of the auxiliary switch and the contact in the operation device, thereby providing a large number of contacts required by the control device. Is provided by the contacts of the auxiliary switch, so that the number of contacts provided in the operation device may be small regardless of the number of contacts required by the control device, so that the number of wires connecting the operation device and the control device is also small. Become. As a result, the pipe diameter of the cable that stores the operating device itself and the wiring that connects the operating device and the control device can be reduced, and the effect of reducing the number of wirings and reducing the cost of members can be obtained. The work for attaching and routing the cable to the GIS container is also facilitated, leading to a reduction in man-hours, and from this point, an effect of cost reduction can be obtained.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing an auxiliary switch and its peripheral parts according to an embodiment of the present invention;

FIG. 2 is a plan view showing an example of the auxiliary switch of FIG. 1;

FIG. 3 is an elevation view of the auxiliary switch of FIG. 2;

FIG. 4 is a schematic elevation view of a gas-insulated switch.

[Explanation of symbols]

111 ... operator, 33 ... first contact, 34 ... second contact, 121 ... cable, 107 ... control device, 2 ... auxiliary switch, 211,221 ... drive coil, 212,222
... Driving mechanism, 213,223 ... Contact, 214,224 ...
Terminal

Claims (2)

[Claims] An auxiliary switch circuit of an opening / closing device for transmitting operation statuses of a plurality of main devices constituting a switching device to a control device, provided in an operating device of the main device and connected to an operating mechanism to turn on / off. And an auxiliary switch including a plurality of contacts provided in the control device and a drive coil for driving the contacts, and electrically connecting the drive coil of the auxiliary switch to a contact in an operation device of the main unit. An auxiliary switch circuit for a switchgear, comprising wiring. 2. The auxiliary switch according to claim 1, wherein the contacts in the operating device comprise a first contact and a second contact, wherein the first and second contacts are arranged such that when one is on, the other is off. But,
First and second two drive coils, a plurality of first contacts that are turned on when the first drive coil is driven, and a plurality of second contacts that are turned on when the second drive coil is driven The first drive coil is driven when the first contact in the operation device of the main device is turned on, and the second drive coil is driven when the second contact in the operation device of the main device is turned on. 2. The auxiliary switch circuit for a switchgear according to claim 1, wherein the auxiliary switch circuit is adapted to be driven when necessary.