CN213877912U - Novel electrical loop for canceling self-holding of GIS disconnecting link mechanism - Google Patents

Abstract

The utility model relates to a novel GIS switch mechanism cancels self-sustaining electric return circuit, including switch motor return circuit and switch control circuit, still including the relay MK that is equipped with two coil contacts of A1A 2 and two auxiliary contact of B1B 2 respectively, two coil contacts A1A 2 of relay MK and two auxiliary contact B1B 2 of relay MK get lost electricity and keep synchronous, the coil contact A1 of relay MK connects the power live wire, switch motor return circuit is connected to coil contact A2, the auxiliary contact B1 of relay MK connects the live wire, auxiliary contact B2 connects in the switch control circuit and closes a hand SM 1. The utility model discloses cancellation self-sustaining return circuit makes the switch control principle perfect more, more can effectually prevent behind the maloperation divide-shut brake handle, the motor has carried out corresponding maloperation action after the motor power transmission, makes equipment operation safe and reliable more, has high practicality, needs when having satisfied the overhaul of the equipments.

Description

Novel electrical loop for canceling self-holding of GIS disconnecting link mechanism

Technical Field

The utility model relates to an SF₆The technical field of auxiliary equipment of gas insulated metal-enclosed switches, in particular to a novel electrical loop for canceling self-holding of a GIS disconnecting link mechanism.

Background

At present, SF of 110kV or more₆The knife switch control principle of the gas insulated metal enclosed switchgear is as follows: the circuit comprises a disconnecting link opening and closing loop, a motor loop and the like, and the various electric loops are connected together through a cable to realize the operation of the disconnecting link and realize the opening and closing operation of the disconnecting link mechanism.

The control principle is simple, when the motor is powered off and the control circuit is still electrified on the electrical principle, when the opening and closing handle is operated by mistake, the normally-open points of the relays in the motor circuit are all changed into normally-closed points, the motor can be subjected to corresponding misoperation action once after being powered on, potential safety hazards are brought to power operation, and the safety and reliability of GIS maintenance cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model provides a be not enough to prior art, the utility model provides a novel GIS switch mechanism cancellation self-sustaining electric loop utilizes the synchronization action of relay MK and two auxiliary contact, when the maloperation divide-shut brake handle appears in operating personnel, the corresponding action of maloperation can not appear after the motor is electrified, makes equipment operation safe and reliable more.

The utility model discloses a realize through following technical scheme:

the utility model provides a novel GIS switch mechanism cancels electric return circuit of self-sustaining, including switch motor return circuit and switch control circuit, still include the relay MK that is equipped with two coil contacts of A1, A2 and two auxiliary contacts of B1, B2 respectively, two coil contacts A1 of relay MK, A2 and two auxiliary contacts B1 of relay MK, B2 gain loss of electricity and keep synchronous, coil contact A1 of relay MK connects the power live wire, coil contact A2 connects the switch motor return circuit, auxiliary contact B1 of relay MK connects the power live wire, auxiliary contact B2 connects and divides switch-on handle SM1 in the switch control circuit.

Further, two coil contacts a1 and a2 of the relay MK and two auxiliary contacts B1 and B2 of the relay MK are connected to the GIS cubicle through the terminal block.

The relay MK and the auxiliary contacts A1 and A2 thereof are directly installed in the GIS control cubicle through the terminal strip and are connected into an effective electric loop through cables, so that the relay MK and the auxiliary contacts A1 and A2 thereof can be conveniently installed and realize corresponding functions.

The utility model has the advantages that:

the switch motor return circuit loses the electricity, under the circumstances that switch control circuit got the electricity, behind the maloperation switch control circuit, after switch motor return circuit got the electricity again, the motor can carry out once corresponding maloperation, bring the potential safety hazard for the electric power operation, cancel behind the self-sustaining return circuit, make the switch control principle more perfect, more can effectually prevent behind the maloperation divide-shut brake handle, the condition that the motor can carry out corresponding maloperation action takes place after the motor power transmission, make equipment operation safe and reliable more, has high practicality, needs when having satisfied the equipment maintenance.

Drawings

Fig. 1 is a circuit diagram of a knife switch control circuit in the prior art.

Fig. 2 is a schematic diagram of the circuit structure of the present invention.

Shown in the figure:

1. a knife switch motor circuit 2, a knife switch control circuit 3, a relay MK, 4, coil contacts A1, 5, coil contacts A2, 6, auxiliary contacts B1, 7, auxiliary contacts B2, 8, switch-on and switch-off handles SM1, 9, a power live wire, 10 and a motor DM.

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 simple structure, stable performance is reliable, novel GIS switch mechanism that is convenient for operate cancels self-sustaining electric circuit, including switch motor circuit 1 and switch control circuit 2, still include the relay MK3 that is equipped with two coil contacts A1, A2 and two auxiliary contacts of B1/B2 respectively, two coil contacts A1 of relay MK3, two coil contacts B1 of A2 and relay MK, B2 gain loss of power and keep in step, coil contact A14 of relay MK3 connects power live wire 9, coil contact A25 connects switch motor circuit 1, auxiliary contact B16 of relay MK3 connects power live wire 9, auxiliary contact B27 connects in switch control circuit 2 divide the floodgate handle SM 18.

The two coil contacts A1 and A2 of the relay MK3 and the two auxiliary contacts B1 and B2 of the relay MK3 are connected in the GIS control cabinet through terminal blocks. As shown in fig. 2, the portion inside the square frame in the figure is a schematic structural diagram of the disconnecting link circuit, and the portion outside the square frame in the figure is the portion MK3 of the relay of the present invention, which is located inside the GIS control cubicle.

The technical scheme of the design is as follows: when the power supply of the disconnecting link motor loop 1 is disconnected, the coil of the relay MK3 loses power, the two auxiliary contacts B1 and B2 of the relay MK3 in the disconnecting link control loop 2 are opened, and the disconnecting link control loop loses power. Therefore, after the A1 and A2 contacts of the relay MK3 lose electricity, the two auxiliary contacts B1 and B2 of the relay MK3 at the upper end of the disconnecting link control circuit 2 are disconnected, the disconnecting link control circuit 2 is disconnected, after the disconnecting link control circuit 2 is disconnected, when the disconnecting link handle SM18 is operated by an operator in a misoperation mode, corresponding misoperation actions cannot occur after the motor DM10 is powered on, the running of equipment can be ensured to be safer and more reliable, the device has high practicability, and the requirements of equipment during maintenance are met.

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 GIS switch mechanism cancellation self-sustaining electric loop, includes switch motor return circuit and switch control circuit, its characterized in that: the circuit also comprises a relay MK which is respectively provided with two coil contacts A1 and A2 and two auxiliary contacts B1 and B2, wherein the two coil contacts A1 and A2 of the relay MK and the two auxiliary contacts B1 and B2 of the relay MK are in power failure synchronization, the coil contact A1 of the relay MK is connected with a live wire of a power supply, the coil contact A2 is connected with a circuit of a disconnecting link motor, the auxiliary contact B1 of the relay MK is connected with the live wire of the power supply, and the auxiliary contact B2 is connected with a switching-on handle SM1 in a disconnecting link control circuit.

2. The novel GIS switch mechanism cancellation self-sustaining electrical loop of claim 1, characterized in that: the two coil contacts A1 and A2 of the relay MK and the two auxiliary contacts B1 and B2 of the relay MK are connected in the GIS control cubicle through the terminal block.

Images