CN206134549U - Device for isolating extra-high voltage circuit breakers - Google Patents

Abstract

The utility model relates to a technical field is safeguarded to the electric wire netting, is a device of keeping apart super high voltage circuit breaker, and it includes high -pressure generating line, circuit and isolator operation circuit, and the primary line is established ties on the road has an isolator, circuit breaker owner contact, the 2nd isolator, isolator operation circuit establishes ties there is circuit breaker auxiliary contact, and it has electricity code lock to connect in parallel at circuit breaker auxiliary contact's both ends, isolator operation circuit is connected with an isolator, the 2nd isolator electricity respectively. The utility model has the advantages of reasonable and compact structure, convenient to use, it is at a parallelly connected electricity code lock at the circuit breaker auxiliary contact both ends, and electricity code lock is equivalent to and after inserting the computer key unblock of electricity code lock, is equivalent to that NO -contact is closed by a NO -contact, and the isolator operation circuit switch -on can be drawn back an isolator, the 2nd isolator, and the electricity code is locked and can be installed on isolator mechanism chamber door, has safe, laborsaving, simple and convenient, efficient characteristics.

Description

Device for isolating extra-high voltage circuit breakers

technical field

The utility model relates to the technical field of power grid maintenance devices, which is a device for isolating ultra-high voltage circuit breakers.

Background technique

During the switching operation of extra-high voltage circuit breakers and disconnectors, the safety of their operation directly affects the safety of the power grid. The opening and closing of the circuit breaker will be blocked due to the decrease of the pressure of the gas arc extinguishing medium or the decrease of the liquid pressure of the hydraulic operating mechanism. For the ultra-high voltage circuit breaker, the "microcomputer anti-misoperation locking" cannot be used for opening operation. The original operation is to short the external connection point between the circuit breaker and the isolating switch, and then use the five-proof unlocking key to realize the isolation on both sides of the circuit breaker. The switch isolates the faulty device. This operation is likely to cause problems such as inaccurate location of electrical locking nodes, poor contact of short-circuit wires during operation, non-execution of isolating switches, and other problems, and there are potential safety hazards at the same time.

Contents of the invention

The utility model provides a device for isolating ultra-high-voltage circuit breakers, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem that the existing ultra-high-voltage circuit breakers cannot be opened when they are opened and closed by using a microcomputer to prevent false locking. 1. Unable to find the position of the locking node of the electrical appliance, poor contact of the short-circuit wiring during operation, resulting in non-execution of the isolating switch, and potential safety hazards.

The technical scheme of the utility model is realized by the following measures: a device for isolating an ultra-high voltage circuit breaker, including a high-voltage bus, a primary circuit and an operating circuit of an isolating switch. The first isolating switch, the main contact of the circuit breaker, and the second isolating switch are connected in series in sequence, the first isolating switch is a normally open switch, the main contact of the circuit breaker is a normally open contact, and the second isolating switch is a normally open switch; The circuit breaker auxiliary contact is connected in series in the switch operation circuit, and an electric code lock is connected in parallel at both ends of the circuit breaker auxiliary contact. The circuit breaker auxiliary contact is a normally closed contact; The isolating switch is electrically connected.

Below is the further optimization or/and improvement to above-mentioned utility model technical scheme:

The main contact of the first grounding knife switch is connected in series between the first isolating switch and the main contact of the circuit breaker, the main contact of the first grounding knife switch is a normally open contact, and the operating circuit of the isolating switch at the lower end of the auxiliary contact of the circuit breaker The first grounding knife switch auxiliary contact is connected in series on the upper side, and the first grounding knife switch auxiliary contact is a normally closed contact.

The main contact of the second grounding knife switch is connected in series between the main contact of the circuit breaker and the second isolating switch. The main contact of the second grounding knife switch is a normally open contact, and the isolation of the lower end of the auxiliary contact of the first grounding knife switch A second grounding knife switch auxiliary contact is connected in series on the switch operation circuit, and the second grounding knife switch auxiliary contact is a normally closed contact.

The primary line at the lower end of the second isolating switch is connected in series with the main contact of the third grounding knife switch, the main contact of the third grounding knife switch is a normally open contact, and the operating circuit of the isolating switch at the lower end of the auxiliary contact of the second grounding knife switch A third grounding knife switch auxiliary contact is connected in series on the upper side, and the third grounding knife switch auxiliary contact is a normally closed contact.

The utility model has a reasonable and compact structure and is easy to use. An electric coded lock is connected in parallel at both ends of the auxiliary contact of the circuit breaker. The electric coded lock is equivalent to a normally open contact. The opening contact is closed, the operating circuit of the isolating switch is connected, the first isolating switch and the second isolating switch can be pulled apart, and the electric coded lock can be installed on the door of the isolating switch mechanism, which has the characteristics of safety, labor saving, simplicity and high efficiency.

Description of drawings

Accompanying drawing 1 is the schematic diagram of the circuit principle of the connection between the high-voltage busbar and the primary line in the best embodiment of the utility model.

Accompanying drawing 2 is the circuit schematic diagram of the operating circuit of the isolating switch of the best embodiment of the utility model.

The codes in the drawings are: 1 is the high-voltage bus, 2 is the primary line, 3 is the operating circuit of the isolation switch, 4 is the first isolation switch, 5 is the main contact of the circuit breaker, 6 is the second isolation switch, and 7 is the circuit breaker. 8 is the electric code lock, 9 is the main contact of the first grounding knife switch, 10 is the auxiliary contact of the first grounding knife switch, 11 is the main contact of the second grounding knife switch, and 12 is the second grounding knife The gate auxiliary contact, 13 is the main contact of the third grounding knife switch, and 14 is the auxiliary contact of the third grounding knife switch.

detailed description

The utility model is not limited by the following examples, and the specific implementation manner can be determined according to the technical scheme of the utility model and actual conditions.

In this utility model, for the convenience of description, the description of the relative positional relationship of each component is described according to the layout method of Fig. The relationship is determined according to the layout direction of the drawings in the specification.

Below in conjunction with embodiment and accompanying drawing, the utility model is further described:

As shown in Figures 1 and 2, the device for isolating extra-high voltage circuit breakers includes a high-voltage bus 1, a primary line 2, and an isolating switch operating circuit 3. The upper end of the primary line 2 is connected to the high-voltage bus 1, and the primary line 2 is connected from top to bottom. The first isolating switch 4, the main contact 5 of the circuit breaker, and the second isolating switch 6 are connected in series in sequence. The first isolating switch 4 is a normally open switch, the main contact 5 of the circuit breaker is a normally open contact, and the second isolating switch 6 is Normally open switch; isolating switch operating circuit 3 is connected in series with circuit breaker auxiliary contact 7, and the two ends of circuit breaker auxiliary contact 7 are connected in parallel with electric code lock 8, circuit breaker auxiliary contact 7 is a normally closed contact; isolating switch operation The loop 3 is electrically connected to the first isolation switch 4 and the second isolation switch 6 respectively. When the main contact 5 of the circuit breaker is closed, the auxiliary contact 7 of the circuit breaker is broken, and the operating circuit 3 of the isolating switch cannot be connected, so that the first isolating switch 4 and the second isolating switch 6 cannot be opened, and the circuit breaker cannot be repaired. To solve this problem, the utility model connects an electric coded lock 8 in parallel at both ends of the auxiliary contact 7 of the circuit breaker. The electric coded lock 8 is equivalent to a normally open contact. The contacts are closed, the isolating switch operating circuit 3 is connected, the first isolating switch 4 and the second isolating switch 6 can be pulled apart, and the electric coded lock 8 can be installed on the box door of the isolating switch mechanism.

According to actual needs, the above-mentioned device for isolating extra-high voltage circuit breakers can be further optimized or/and improved:

As shown in Figures 1 and 2, the first grounding knife switch main contact 9 is connected in series between the first isolating switch 4 and the circuit breaker main contact 5, and the first grounding knife switch main contact 9 is a normally open contact. The first grounding knife switch auxiliary contact 10 is connected in series on the isolating switch operating circuit 3 at the lower end of the circuit breaker auxiliary contact 7, and the first grounding knife switch auxiliary contact 10 is a normally closed contact. The first grounding knife switch main contact 9 and the first grounding knife switch auxiliary contact 10 are used together to improve the device safety of the isolation ultra-high voltage circuit breaker.

As shown in Figures 1 and 2, the main contact 11 of the second grounding knife switch is connected in series between the main contact 5 of the above-mentioned circuit breaker and the second isolating switch 6, and the main contact 11 of the second grounding knife switch is a normally open contact. The second grounding knife auxiliary contact 12 is connected in series on the isolating switch operating circuit 3 at the lower end of the first grounding knife auxiliary contact 10, and the second grounding knife auxiliary contact 12 is a normally closed contact. The second grounding knife switch main contact 11 and the second grounding knife switch auxiliary contact 12 are used together to improve the device safety of the isolation ultra-high voltage circuit breaker.

As shown in Figures 1 and 2, the primary line 2 at the lower end of the second isolating switch 6 is connected in series with a third grounding knife switch main contact 13, the third grounding knife switch main contact 13 is a normally open contact, and the third grounding knife switch main contact 13 is a normally open contact. A third grounding knife auxiliary contact 14 is connected in series on the isolating switch operating circuit 3 at the lower end of the second grounding knife auxiliary contact 12, and the third grounding knife auxiliary contact 14 is a normally closed contact. The third grounding knife switch main contact 13 and the third grounding knife switch auxiliary contact 14 are used together to improve the device safety of the isolation ultra-high voltage circuit breaker.

The use process of the most preferred embodiment of the present utility model:

Under normal working conditions, the first isolating switch 4, the circuit breaker main contact 5, and the second isolating switch 6 in Fig. 1 are all in the closed state, and the first grounding knife switch main contact 9 and the second grounding knife Head 11 and the third grounding knife switch main contact 13 are in the disconnected state; at this time, the auxiliary contact 7 of the circuit breaker in Figure 2 is in the disconnected state, the first grounding knife switch auxiliary contact 10, the second grounding Both the knife switch auxiliary contact 12 and the third ground knife switch auxiliary contact 14 are in a closed state.

When the circuit breaker fails, the main contact 5 of the circuit breaker is blocked, and the first isolating switch 4 and the second isolating switch 6 need to be disconnected, but since the main contact 5 of the circuit breaker is in the closed state, the auxiliary contact 7 of the circuit breaker is still In the off state, the isolating switch operating circuit 3 is in the off state, and the first isolating switch 4 and the second isolating switch 6 cannot be disconnected.

In the utility model, an electric coding lock 8 is connected in parallel at both ends of the auxiliary contact 7 of the circuit breaker. The electric coding lock 8 is equivalent to a normally open contact. The switch operation circuit 3 is connected, and the first isolating switch 4 and the second isolating switch 6 are disconnected. At this time, the main contact 9 of the first grounding knife switch, the main contact 11 of the second grounding knife switch, and the third grounding knife The main contact 13 of the gate is closed respectively, and the first grounding knife auxiliary contact 10, the second grounding knife auxiliary contact 12, and the third grounding knife auxiliary contact 14 are respectively disconnected; the technical scheme provided by the utility model is safer , stable, and can be conveniently and quickly isolated and repaired for ultra-high voltage circuit breakers.

The above technical features constitute the best embodiment of the utility model, which has strong adaptability and best implementation effect, and non-essential technical features can be increased or decreased according to actual needs to meet the needs of different situations.

Claims (4)

1. A device for isolating an ultra-high voltage circuit breaker, characterized in that it comprises a high-voltage bus, a primary circuit and an isolating switch operating circuit, the upper end of the primary circuit is connected to the high-voltage bus, and the primary circuit is sequentially connected in series with the first isolating switch, The main contact of the circuit breaker, the second isolating switch, the first isolating switch is a normally open switch, the main contact of the circuit breaker is a normally open contact, and the second isolating switch is a normally open switch; the operating circuit of the isolating switch is connected in series with the auxiliary contact of the circuit breaker There is an electric coding lock connected in parallel at both ends of the auxiliary contact of the circuit breaker, and the auxiliary contact of the circuit breaker is a normally closed contact; the operating circuit of the isolating switch is electrically connected with the first isolating switch and the second isolating switch respectively. 2. The device for isolating an extra-high voltage circuit breaker according to claim 1, wherein a first grounding knife switch main contact is connected in series between the first isolating switch and the circuit breaker main contact, and the first grounding knife switch main contact is connected in series. The contacts are normally open contacts, and the operating circuit of the isolating switch at the lower end of the auxiliary contact of the circuit breaker is connected in series with the first grounding knife switch auxiliary contact, and the first grounding knife switch auxiliary contact is a normally closed contact. 3. The device for isolating an ultra-high voltage circuit breaker according to claim 2, characterized in that a second grounding knife switch main contact is connected in series between the circuit breaker main contact and the second isolating switch, and the second grounding knife switch main contact is connected in series. The contact is a normally open contact, and the second grounding knife auxiliary contact is connected in series on the isolating switch operating circuit at the lower end of the first grounding knife auxiliary contact, and the second grounding knife auxiliary contact is a normally closed contact. 4. The device for isolating an extra-high voltage circuit breaker according to claim 3, wherein the primary circuit at the lower end of the second isolating switch is connected in series with a third grounding knife switch main contact, and the third grounding knife switch main contact is A normally open contact, a third grounding knife auxiliary contact is connected in series on the isolating switch operating circuit at the lower end of the second grounding knife auxiliary contact, and the third grounding knife auxiliary contact is a normally closed contact.