CN214069563U - Novel GIS circuit breaker three-phase inconsistent protection circuit - Google Patents

Abstract

The utility model relates to a novel GIS breaker three-phase inconsistent protection circuit, the breaker auxiliary contact and the breaker opening circuit are electrically connected through a three-phase inconsistent starting breaker opening and closing pressing plate; the time relay also comprises a time relay, a starting relay and a reset button, wherein the three phases of the time relay are inconsistent, a first coil contact of the time relay is electrically connected with an auxiliary contact of the circuit breaker, and a second coil contact of the time relay is connected with negative electricity through a protection input pressing plate; the first auxiliary contact of the time relay is connected with positive electricity; the first coil contact of start relay concatenates the first auxiliary contact of start relay, and the second auxiliary contact of start relay meets with positive electricity through reset button, and the first coil contact of start relay still concatenates the second auxiliary contact of time relay, and start relay second coil contact electricity is connected between protection input clamp plate and time relay second coil contact. The utility model discloses have the self-sustaining function, can guarantee the reliable operation of circuit, the mistake tripping operation phenomenon can not appear.

Description

Novel GIS circuit breaker three-phase inconsistent protection circuit

Technical Field

The utility model relates to an SF₆The technical field of auxiliary equipment of gas-insulated metal-enclosed switch belongs to a circuit breaker protection circuit and its equipmentThe utility model provides a novel inconsistent protection circuit of GIS circuit breaker three-phase.

Background

220kV SF₆The control principle of the circuit breaker of the gas insulated metal enclosed switchgear is as follows: the circuit breaker comprises a circuit breaker opening and closing loop, a three-phase inconsistent protection loop, an energy storage loop, a low-pressure locking loop, a motor control loop, a monitoring loop and the like, wherein the various electric loops are connected together through cables to realize the operation of the circuit breaker, effective three-phase inconsistent protection is not carried out on a circuit breaker mechanism electrically, and the phenomenon that a circuit breaks down and trips due to external factors when the circuit breaker is in a closing state is easily caused.

SUMMERY OF THE UTILITY MODEL

The not enough to prior art, the utility model provides a novel inconsistent protection circuit of GIS circuit breaker three-phase makes circuit breaker control principle perfect more, more can effectually prevent because of the relay damages, or factor influences such as operation lead to the inconsistent export relay malfunction of circuit breaker three-phase, lead to forcing the separating brake phenomenon, make equipment operation safe and reliable more.

The utility model discloses a realize through following technical scheme:

the novel GIS breaker three-phase inconsistent protection circuit comprises a breaker auxiliary contact and a breaker opening circuit, wherein the breaker auxiliary contact and the breaker opening circuit are electrically connected through a three-phase inconsistent starting breaker opening input pressing plate; also comprises a time relay with three inconsistent phases, a starting relay with three inconsistent phases and a reset button with three inconsistent phases,

a first coil contact of the time relay is electrically connected with an auxiliary contact of the circuit breaker, and a second coil contact of the time relay is connected with negative electricity through a protection input pressing plate with three phases inconsistent; the first auxiliary contact of the time relay is connected with positive electricity;

the first coil contact of starting relay concatenates the first auxiliary contact of starting relay, and the second auxiliary contact of starting relay meets with positive electricity through reset button, and the first coil contact of starting relay still concatenates the second auxiliary contact of time relay, and the second coil contact electricity of starting relay connects between the second coil contact of protection input clamp plate and time relay.

This scheme is with circuit breaker mechanism auxiliary contact, the inconsistent time relay of three-phase, the inconsistent start relay of three-phase, the inconsistent protection of three-phase drops into the clamp plate and reset button makes its formation three-phase inconsistent protection circuit back through the cable conductor, makes circuit breaker control principle perfect more, more can effectually prevent to damage because of the relay, or factor influences such as operation lead to the inconsistent export relay malfunction of circuit breaker three-phase, lead to forcing the separating brake phenomenon, make the equipment operation safe and reliable more.

Further, a three-phase inconsistent time relay, a three-phase inconsistent starting relay, a three-phase inconsistent protection input pressing plate and a three-phase inconsistent reset button are all installed in the GIS control cubicle.

The time relay, the starting relay, the reset button and the pressing plate which are inconsistent in three phases are directly fixed in the GIS control cubicle, electrical elements in the circuit breaker control circuit cubicle are connected together through a wire and are connected with an auxiliary contact inside the circuit breaker through a cable, so that forced tripping caused by misoperation of a circuit due to inconsistent protection in three phases is effectively prevented when the circuit breaker is in a switching-on state, and the circuit breaker is safer and more reliable to operate.

The breaker mechanism is internally provided with an auxiliary contact, the breaker mechanism auxiliary contact is arranged on an operating mechanism in a breaker mechanism box and is connected into a GIS control cubicle through a cable, and when a breaker is switched on and off, the state of the breaker mechanism auxiliary contact is converted, so that a three-phase inconsistent protection circuit can normally run.

The utility model has the advantages that:

through designing neotype three-phase inconsistent protection circuit, guarantee that the circuit breaker when having a looks disconnection at least, three-phase inconsistent return circuit could start, and three-phase inconsistent relay has the self-sustaining function, can guarantee the operation of circuit safe and reliable, even three-phase inconsistent relay malfunction, tripping operation phenomenon also can not appear in the circuit breaker.

In addition, the protection circuit enables the control principle of the circuit breaker to be more perfect, the phenomenon that the three-phase inconsistent outlet relay of the circuit breaker malfunctions due to the damage of the relay or the influence of factors such as operation and the like can be effectively prevented, the forced opening phenomenon is caused, the equipment is enabled to operate more safely and reliably, the high practicability is achieved, and the circuit breaker is very suitable for operating in an unattended transformer substation.

Drawings

Fig. 1 is a structural circuit diagram of a three-phase inconsistent protection circuit of a circuit breaker in the prior art;

fig. 2 is a structural circuit diagram of the three-phase inconsistent protection circuit of the present invention;

fig. 3 is the utility model discloses well circuit breaker auxiliary contact and the three inconsistent connection structure circuit diagrams between the relay.

Shown in the figure:

1. circuit breaker auxiliary contact, 2, circuit breaker separating brake return circuit, 3, inconsistent start circuit breaker separating brake of three-phase puts into the clamp plate, 4, positive electricity, 5, the burden electricity, 6, time relay, 7, start relay, 8, time relay's auxiliary contact, 9, start relay's auxiliary contact, 10, reset button, 11, protection input clamp plate, 12, time relay's first coil contact, 13, time relay's second coil contact, 14, start relay's second coil contact, 15, start relay's first coil contact, 16, time relay's second auxiliary contact, 17, time relay's first auxiliary contact, 18, start relay's first auxiliary contact, 19, start relay's second auxiliary contact.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.

The utility model provides a novel inconsistent protection circuit of GIS circuit breaker three-phase, includes circuit breaker auxiliary contact 1 and circuit breaker separating brake return circuit 2, and wherein, circuit breaker separating brake return circuit 2 is prior art, and the here is just not repeated. The breaker auxiliary contact 1 and the breaker opening loop 2 are electrically connected through a three-phase inconsistent starting breaker opening input pressing plate 3 (LP 3); and a three-phase inconsistent time relay 6 (KT 2), a three-phase inconsistent starting relay 7 (KM 6) and a three-phase inconsistent reset button 10 (1 FA).

A first coil contact 12 of the time relay is electrically connected with the auxiliary contact 1 of the circuit breaker, and a second coil contact 13 of the time relay is connected with the negative electricity 5 through a protection input pressing plate 11 with inconsistent three phases; the first auxiliary contact 17 of the time relay is connected with the positive electrode 4;

the first coil contact 15 of the starting relay is connected in series with the first auxiliary contact 18 of the starting relay, the second auxiliary contact 19 of the starting relay is connected with the positive electrode 4 through the reset button 10, the first coil contact 15 of the starting relay is also connected in series with the second auxiliary contact 16 of the time relay, and the second coil contact 14 of the starting relay is electrically connected between the protection input pressing plate 11 and the second coil contact 13 of the time relay.

The three-phase inconsistent time relay 6, the three-phase inconsistent starting relay 7, the three-phase inconsistent protection input pressing plate 11 and the three-phase inconsistent reset button 10 are all installed in the GIS control cubicle.

The utility model discloses a theory of operation:

before the equipment operation, throw into three-phase inconsistent starting circuit breaker separating brake respectively and throw into clamp plate 3 and three-phase inconsistent throwing into clamp plate 11 and throw into, make whole electric circuit switch-on, at the operation in-process:

if the circuit breaker auxiliary contact 1 goes wrong or malfunctions, the coil contact of the time relay 6 is electrified and started, the first auxiliary contact 17 and the second auxiliary contact 16 of the time relay are synchronously electrified and closed at the moment, the coil contact of the starting relay 7 is electrified and started, the first auxiliary contact 18 and the second auxiliary contact 19 of the same starting relay are synchronously electrified and closed at the moment, the three-phase inconsistent protection loop is disconnected at the reset button 10 and self-maintained, the circuit breaker is always in an open-circuit state at the moment, and the circuit breaker is protected.

And after the overhaul is finished, the auxiliary contacts of the relays return to the original positions by pressing the reset button 10, and the three-phase inconsistent protection circuit enters the protection state again.

Of course, the above description is not limited to the above examples, and technical features of the present invention that are not described in the present application may be implemented by or using the prior art, and are not described herein again; the above embodiments and drawings are only used for illustrating the technical solutions of the present invention and are not intended to limit the present invention, and the present invention has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that changes, modifications, additions or substitutions made by those skilled in the art within the spirit of the present invention should also belong to the protection scope of the claims of the present invention.

Claims (2)

1. The utility model provides a novel inconsistent protection circuit of GIS circuit breaker three-phase, includes circuit breaker auxiliary contact and circuit breaker separating brake return circuit, its characterized in that: the circuit breaker auxiliary contact and the circuit breaker opening loop are electrically connected through a three-phase inconsistent opening starting circuit breaker opening input pressing plate; also comprises a time relay with three inconsistent phases, a starting relay with three inconsistent phases and a reset button with three inconsistent phases,

a first coil contact of the time relay is electrically connected with an auxiliary contact of the circuit breaker, and a second coil contact of the time relay is connected with negative electricity through a protection input pressing plate with three phases inconsistent; the first auxiliary contact of the time relay is connected with positive electricity;

the first coil contact of starting relay concatenates the first auxiliary contact of starting relay, and the second auxiliary contact of starting relay meets with positive electricity through reset button, and the first coil contact of starting relay still concatenates the second auxiliary contact of time relay, and the second coil contact electricity of starting relay connects between the second coil contact of protection input clamp plate and time relay.

2. The novel GIS breaker three-phase inconsistent protection circuit of claim 1, wherein: the three-phase inconsistent time relay, the three-phase inconsistent starting relay, the three-phase inconsistent protection input pressing plate and the three-phase inconsistent reset button are all installed in the GIS control cubicle.

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