JPH04105439U - switch gear - Google Patents

Abstract

(57) [Summary] [Purpose] The object of the present invention is to obtain a switchgear that can freely use two types of circuit breakers with different control circuits that are structurally compatible. [Structure] Among two types of circuit breakers that are structurally compatible and have different operation methods, one of the circuit breakers 10 is provided with a limit switch drive plate 11, and a limit switch drive plate 11 is provided in a predetermined position in a cubicle 9 in which this circuit breaker 10 is housed. A limit switch 8 is provided that operates when the limit switch drive plate 11 comes into contact with the position, and one breaker 10 is housed in a cubicle 9 in a control circuit equipped with different control sections corresponding to each of the two types of breaker. The circuit breaker 10 is characterized in that when the limit switch 8 is activated, the circuit breaker 10 is switched to the corresponding control circuit section.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention facilitates the use of different control circuits of two types of circuit breakers that are structurally compatible. This invention relates to switchgear that can be used for various purposes.

0002

[Conventional technology]

In recent years, there have been significant technological advances in switchgears, which are widely used in general industry and power generation and substations. Yes. For example, in medium voltage switchgear, magnetic circuit breakers were used as circuit breakers until one generation ago. was the mainstream, but now vacuum breakers or gas breakers are being used. There is.

0003 On the other hand, among switchgear manufactured before the first generation, 20 to 30 years have passed since then. Many of these are currently in operation. Long lifespan of these switchgears used for long periods of time As part of the This is effective for improving the reliability and maintainability of subsequent switchgears.

0004 Recently, based on this idea, there has been active development of circuit breakers that are compatible with older models. It has been implemented. For example, if the original magnetic breaker is structurally compatible, In some cases, vacuum breakers have been developed.

[0005] When making these circuit breakers with different principles and structures compatible, structurally the bushing is compatibility in ring dimensions, interlock mechanisms, auxiliary switch drive mechanisms, etc. However, in order to take advantage of the characteristics of each breaker, the control circuit is necessary. There are different cases possible. For example, the original circuit breaker is operated by a solenoid. On the other hand, if the new breaker is electric spring operated, the control circuit will be different. When adopting a new breaker, the control on the cubicle side of the existing switchgear It is necessary to change some wiring of the circuit.

[0006] Figure 7 shows a solenoid-operated magnetic breaker and an electric spring-operated vacuum breaker. This figure shows the changes to the wiring on the existing cubicle side when changing to the existing cubicle. figure In 7, 1 is an internal connection component of the magnetic breaker, which connects the closing coil 2 and the trip controller. A control relay 4 and a closing auxiliary relay 5 are installed on the cubicle side. It is provided.

[0007] When changing to a vacuum breaker, do not show the internal connections of the vacuum breaker. However, since the solenoid operation is an electric spring operation, the control relay 4 and closing supplement are required. Since the auxiliary relay 5 is no longer required, the supplies and wiring in the hatched area 6 in Figure 7 It can be changed to a vacuum breaker cubicle by removing it and adding the wiring shown in 7. Wear.

[0008]

[Problem that the idea aims to solve]

If all the circuit breakers for the existing switchgear are to be replaced with new models at the same time, If this is the case, the control circuit on the panel side can be handled by making the necessary wiring changes to match the new model. It is Noh. However, if the old model breaker is used as a backup, or if If you update the breaker in the future, there will be old and new breaker, and the It is desirable to be able to freely apply old and new circuit breakers to any panel as before for maintenance purposes. To this end, the new and old circuit breakers must be compatible not only in terms of structure but also in terms of control circuits. It is necessary.

[0009] This invention allows for free use of two types of circuit breakers with different control circuits that are structurally compatible. The aim is to provide a switchgear that can freely use two types of circuit breakers. target

0010

[Means to solve the problem]

The first configuration of the present invention consists of two types of shields with different operating methods that are structurally compatible. One of the circuit breakers is equipped with a limit switch drive plate, and this circuit breaker The limit switch drive plate contacts a predetermined position in the cubicle where the limit switch is stored. The structure includes a limit switch that operates with each of the two types of breaker. The one breaker is connected to the control circuit including a different control circuit section corresponding to the one of the circuit breakers. When stored in a cubicle and the limit switch is activated, the breaker is activated. A switching means is provided for switching to a corresponding control circuit section.

[0011] In addition, the second configuration of the present invention has two types of structurally compatible but different operating methods. By utilizing the difference in the shape and dimensions of the circuit breakers, one of the circuit breakers can be placed inside the cubicle. A photodetector consisting of a light-emitting element and a light-receiving element that detects when the device is stored in a fixed position. A circuit breaker is provided in the cubicle, and a circuit breaker is provided for each of the two types of circuit breakers. The one breaker is connected to a control circuit having a different control circuit section corresponding to the queue. When the photodetector detects that the vehicle is stored in a predetermined position, the A switching means is provided in the control circuit section corresponding to the circuit breaker.

0012

[Effect]

In the switchgear having the first configuration above, one of the two types of circuit breakers is the limiter. A breaker with a switch drive plate is inserted into the cubicle and connected to the correct position. When the limit switch drive plate moves to the opposite limit switch on the cubicle side. operate the switch. On the other hand, a breaker without a limit switch drive plate has a regular position. The limit switch cannot be operated even if it is connected to the therefore, A control circuit with two control circuit sections is configured depending on whether the limit switch operates or not. - Automatically switching to the control circuit corresponding to the circuit breaker housed in the vehicle. becomes possible.

[0013] In addition, in the switchgear having the second configuration described above, the breaker is located in the cubicle. When the circuit breaker is inserted into a predetermined position in the The difference between cases in which light is transmitted between the light-emitting element and the light-receiving element and cases in which it is not A control circuit with two control circuit sections is housed in a cubicle. It becomes possible to automatically switch to the control circuit section corresponding to the breaker.

[0014]

【Example】

Embodiments of the present invention will be described below with reference to the drawings.

[0015] 1 to 3 each show a first embodiment of a switchgear according to the present invention. Figure 1 shows a solenoid-operated magnetic breaker and an electric spring-operated vacuum breaker. A control circuit diagram that allows the device to be used, Figure 2 shows the state in which the vacuum breaker is inserted into the cubicle. FIG. 3 is a front view of the vacuum breaker, and FIG. 3 is a side view of the vacuum breaker.

[0016] In Figure 1, 1 is the internal connection component of the original magnetic breaker; The connection component 1 includes a closing coil 2 and a trip coil 3, and a solenoid on the cubicle side. A control relay 4 and a closing auxiliary relay 5 are especially provided for operating the lenoid. .

[0017] In this original magnetic breaker, in this example, the cubicle side A bypass limit switch 6 is connected in parallel to the control relay provided in the control circuit. Connect electrically to the input side control section of the internal connection component of the vacuum breaker. It was made by sea urchin. In this case, the limit switch 8 is in the queue as shown in FIG. It is attached at a predetermined height position on the side of the vehicle 9, and on the vacuum breaker 10 side, As shown in FIGS. 2 and 3, when it rises to a predetermined height position in the cubicle 9, A limit switch drive plate 11 for operating the limit switch 8 is provided.

[0018] Next, the operation of the switchgear configured as described above will be described.

[0019] First, if you use the original magnetic breaker, queue the magnetic breaker. Insert it into the vehicle 9, raise it by the lifting device, and when it reaches the predetermined height, Even if connected to the circuit, the limit switch 8 will not be operated. That is, magnetic Since there is no limit switch drive plate on the breaker side, limit switch 8 will not operate. do not have. Therefore, the limit switch 8 in FIG. 1 remains "open" and the control circuit section This then becomes the control circuit for the magnetic breaker.

[0020] Next, when using a vacuum breaker, place the vacuum breaker 10 inside the cubicle. It is inserted, raised by a lifting device, and connected to the control circuit when it reaches a predetermined height. When the limit switch drive plate 11 on the vacuum breaker 10 side moves to the cubicle 9 side, contact the limit switch 8 for bypass, and operate this limit switch 8. let Therefore, since the limit switch 8 in FIG. 1 closes, the control relay circuit section The control circuit section serves as a control circuit for the vacuum breaker.

[0021] In this way, in this embodiment, two types of switches with different operating methods are used which are structurally compatible. The disconnector can be used without changing the wiring on the cubicle side.

[0022] 4 to 6 show a second embodiment of the switchgear according to the present invention, respectively. Figure 4 shows a solenoid-operated magnetic breaker and an electric spring-operated vacuum breaker. The control circuit diagram that can be used with the breaker, Figure 5, shows two types of breaker stored in a cubicle. FIG. 6 is a plan view of the state, and FIG. 6 is an interlock circuit diagram. Note that in Figure 4 , parts that are the same as those in Figure 1 are shown with the same symbols, and only the different points will be described here. Ru.

[0023] In this embodiment, as shown in FIG. 4, the control circuit provided in the control circuit on the cubicle side Connect the auxiliary relay contact 12a for bypass in parallel to the relay circuit inside the vacuum breaker. It is designed to be electrically connected to the input side control circuit section of the connection component. be.

[0024] Furthermore, as shown in FIG. 3 and a light receiving element 14. That is, in FIG. 4, the magnetic field indicated by the dotted line The breaker 15 and the vacuum breaker 10 shown by the solid line have different bushings for compatibility. The mounting position of the ring 16 is the same, but the depth dimension is clearly the same as that of the magnetic breaker. 15 is larger both before and after. Also, the cubicle is on the left side of the diagram. The front part and the right side indicate the rear part, and the size of the magnetic breaker 15 on the rear side is particularly large. A light emitting element 13 and a light receiving element 1 are placed on both sides of the cubicle 9 that corresponds to the convex part. There are 4.

[0025] Figure 6 shows a bypass auxiliary relay connection that is installed in parallel with the control relay circuit in Figure 4. The interlock circuit at point 12a is shown. In Figure 6, 17 is a power supply unit. At this point, control power supply buses P and N are connected to this power supply device 17. Also, 18 is a light detection device consisting of the light emitting element 13 and light receiving element 14 connected to the power supply device 17. 19 is an amplification output that is connected to the power supply device 16 and amplifies the signal from the photodetector 18. 12 are connected to the control buses P and N via the signal contacts of this amplification output section 19. This is an auxiliary relay for control circuit bypass.

[0026] Next, the operation of the switchgear configured as described above will be described.

[0027] First, insert the original magnetic breaker to the dotted line position in cubicle 9 in Figure 5. When the light emitting element 13 installed in the cubicle 9 enters the magnetic breaker 1 Since the light is cut off at the rear of the light receiving element 14, the light receiving element 14 does not receive the light. For this reason, Since the photodetector 18 in FIG. 6 does not output a photodetection signal, the signal contact of the amplification output section 19 remains open and the bypass auxiliary relay 12 does not operate.

[0028] Therefore, the bypass auxiliary relay contact 12a in FIG. 4 is open, and the control The circuit section is a control circuit for a magnetic breaker.

[0029] Next, when using a vacuum breaker, move the vacuum breaker 8 to the solid line position in Figure 5. Even if it is inserted, the light from the light emitting element 13 installed in the cubicle 9 will not be blocked. Then, the light receiving element 14 receives the light. Therefore, the optical detection unit 17 in FIG. Since the output signal is output, the amplification output section 19 operates and closes the signal contact. , the bypass auxiliary relay 12 operates.

[0030] Therefore, since the auxiliary relay contact 12a for bypass shown in FIG. 4 is closed, the control The circuit has a circuit configuration in which the vacuum breaker 10 can be used.

[0031] In this way, in this embodiment, there are two types of shutoffs with different operating methods that are structurally compatible. The device can be used without changing the wiring on the cubicle side.

[0032] In addition, in the first embodiment and the second embodiment described above, the true solenoid operation method is We have discussed the case of air breaker and electric spring operated vacuum breaker. For switchgear with a breaker stored in a vehicle, if the breaker is a horizontal drawer, For example, in addition to magnetic circuit breakers and vacuum circuit breakers, oil-immersed circuit breakers or gas breaker, etc., without being limited by operation method and voltage class. Combinations can also be applied and implemented in the same manner as described above.

[0033] In addition, in the first embodiment, the limit switch and the limit switch drive plate are The mounting position and shape are designed based on the combination conditions of the cubicle and breaker. It is.

[0034]

[Effect of the idea]

As described above, according to the present invention, the structure is simple, highly reliable, and structurally compatible. We can provide switchgear that can be used with two types of circuit breakers with different control circuits. Wear.

[Brief explanation of drawings]

FIG. 1 is a control circuit diagram showing a first embodiment of a solenoid-operated magnetic breaker and an electric spring-operated vacuum breaker as a switchgear according to the present invention.

FIG. 2 is a front view showing a vacuum breaker inserted into a cubicle in the same embodiment.

FIG. 3 is a side view of the same vacuum breaker inserted into the cubicle.

FIG. 4 is a control circuit diagram showing a second embodiment of the present invention.

FIG. 5 is a plan view showing a vacuum breaker and a magnetic breaker inserted into a cubicle in a second embodiment of the switchgear according to the present invention.

FIG. 6 is an interlock circuit diagram in the same embodiment.

FIG. 7 is a control circuit diagram based on the use of one type of conventional circuit breaker.

[Explanation of symbols]

1... Magnetic breaker internal connection component, 2... Closing coil, 3... Trip coil, 4... Control relay, 5...
Auxiliary closing relay, 8... limit switch, 9... cubicle, 10... vacuum breaker, 11... limit switch drive plate, 12... auxiliary relay, 12a... auxiliary relay contact, 13... light emitting element, 14... Light receiving element, 1
5...Magnetic breaker, 16...Bushing, 17...Power supply device, 18...Photodetection device, 19...Amplification output section.

Claims (2)

[Scope of utility model registration request] [Claim 1] Among two types of circuit breakers that are structurally compatible and have different operation methods, one of the circuit breakers is provided with a limit switch driving plate, and the limit switch driving plate is installed at a predetermined position in the cubicle in which this circuit breaker is housed. A limit switch is provided that operates when the limit switch drive plate comes into contact with the limit switch,
When one of the circuit breakers is housed in the cubicle and the limit switch is operated, the control circuit includes different control units corresponding to each of the two types of circuit breakers. A switchgear characterized by being provided with a switching means for switching. [Claim 2] Detecting that one of the breaker is housed in a predetermined position in the cubicle by utilizing the difference in shape and size of two types of breaker which are structurally compatible but have different operation methods. A photodetecting device consisting of a light emitting element and a light receiving element is provided in the cubicle, and one of the breaker is connected to a control circuit including a different control circuit section corresponding to each of the two types of breaker. 1. A switchgear comprising a switching means for switching to a control circuit section corresponding to the breaker when the photodetecting device detects that the breaker is housed in a predetermined position.