CN104020382B - A kind of three-phase portable simulation isolating switch - Google Patents

Abstract

The invention discloses a three-phase portable analog circuit breaker; it includes a tripping unit and a closing unit, and the tripping unit is composed of time relays T11-T13, auxiliary relays J11-J13, resistors R11-R13, linkage switch S1 and linkage switch S2 The coils of the auxiliary relays J11-J13 are respectively connected to the A-phase trip signal input terminal A1, the B-phase trip signal input terminal B1, and the C-phase trip signal input terminal C1, and the other coils are connected to the three-phase simultaneous trip signal input terminal T The closing unit (2) has the same structure as the tripping unit (1), and the closing unit (2) is composed of time relays T21-T23, auxiliary relays J21-J23, resistors R21-R23, linkage switch S1 and linkage switch S2 ; It effectively improves the efficiency of functional testing of circuit breakers and their protective devices, and solves the time-consuming and laborious problem of simultaneous tripping and closing operations of three-phase circuit breakers. <!-- 2 -->

Description

A three-phase portable analog circuit breaker

technical field

The invention relates to a three-phase portable analog circuit breaker, in particular to a high-voltage circuit breaker suitable for a voltage level of 220kV and above.

Background technique

In substations and user power distribution rooms, functional tests such as transmission, tripping and closing should be carried out on the protection devices of newly installed high-voltage circuit breakers. In order to ensure the accuracy of the test, the high-voltage circuit breaker needs to perform multiple tripping and closing operations. A large number of tripping and closing times will have a negative impact on the high-voltage circuit breaker and reduce the service life of the high-voltage circuit breaker. In the 110kV substation, a three-phase high-voltage circuit breaker is used. The switch contacts of the three-phase high-voltage circuit breaker are in a circuit breaker operating mechanism box, and a set of secondary operation circuits simultaneously control the tripping and closing of the three phases. Phase-operated high-voltage circuit breakers, each phase high-voltage circuit breaker uses a separate protective device mechanism box. In addition, when the actual circuit breaker conditions on site do not meet the requirements of the protection function test, the simultaneous tripping and closing operation of the three-phase high-voltage circuit breaker and the single-phase tripping and closing operation of the three-phase high-voltage circuit breaker must be completed through the simulated circuit breaker; the three-phase circuit breaker needs to be completed simultaneously Tripping and closing operations require three people, each of whom controls a single-phase analog circuit breaker. The operation is very troublesome, time-consuming and laborious.

Contents of the invention

The technical problem to be solved by the present invention is to provide a three-phase portable analog circuit breaker, especially a high-voltage circuit breaker suitable for a voltage level of 220kV and above.

In order to solve the problems of the technologies described above, the technical scheme adopted in the present invention is as follows:

A three-phase portable analog circuit breaker, characterized in that it includes a tripping unit and a closing unit; the tripping unit consists of time relays T11-T13, auxiliary relays J11-J13, resistors R11-R13, linkage switch S1 and linkage switch S2 Composition; the coils of the auxiliary relay J11-J13 are respectively connected to the A-phase trip signal input terminal A1, the B-phase trip signal input terminal B1, and the C-phase trip signal input terminal C1, and the other circuit is connected to the three-phase simultaneous trip signal input terminal T The normally open point of the linkage switch S1, the normally closed point of the linkage switch S2, the normally open electric shock J11-1 of the auxiliary relay J11, and the coil of the time relay T11 are connected in series successively between +24V and the ground, and the auxiliary The normally open contact J12-1 of the relay J12 and the coil of the time relay T12 are connected in series between the normally closed point of the linkage switch S2 and the node b of the normally open contact J11-1 and the ground, and the normally open contact of the auxiliary relay J13 The open contact J13-1 and the coil of the time relay T13 are connected in series between the node b and the ground; the resistance R11 and the normally closed contact T11-1 of the time relay T11 are connected in series between +24V and the ground, Its node is the A-phase tripping signal output terminal AT; it is the normally closed electric shock T12-1 of the resistor R12 and the time relay T12 connected in series between +24V and the ground, and its node is the B-phase tripping signal output terminal BT; The resistor R13 and the normally closed electric shock T13-1 of the time relay T13 are connected in series between +24V and the ground, and its node is the C-phase trip signal output terminal CT;

The closing unit has the same structure as the tripping unit, and the closing unit is composed of time relays T21-T23, auxiliary relays J21-J23, resistors R21-R23, linkage switch S1 and linkage switch S2; the coils of the auxiliary relays J21-J23 One path is respectively connected to the A-phase closing signal input terminal A2, the B-phase closing signal input terminal B2, and the C-phase closing signal input terminal C2, and the other path is connected to the three-phase simultaneous closing signal input terminal H; the output terminals of the closing unit are respectively They are the A-phase closing signal output terminal AH, the B-phase closing signal output terminal AH, and the C-phase closing signal output terminal AH.

The beneficial effects produced by adopting the above-mentioned technical scheme are:

When simulating the tripping and closing of the high-voltage circuit breaker during the test, the present invention can avoid the adverse effects on the circuit breaker caused by repeated tripping and closing of the circuit breaker due to repeated tests, and effectively improve the performance of the circuit breaker and its protection device. The efficiency of functional testing, this device can not only simulate the simultaneous tripping and closing actions of three-phase high-voltage circuit breakers, but also simulate the single-phase tripping and closing actions; it solves the time-consuming and laborious problem of simultaneous tripping and closing operations of three-phase circuit breakers.

Description of drawings

Fig. 1 is a schematic circuit diagram of the present invention;

In Fig. 1: 1. Trip unit; 2. Closing unit.

detailed description

Referring to accompanying drawing 1, a kind of three-phase portable analog circuit breaker in the structure of a specific embodiment of the present invention is characterized in that: it comprises tripping unit 1 and closing unit 2; Tripping unit 1 is composed of time relay T11-T13, auxiliary relay J11 -J13, resistors R11-R13, linkage switch S1 and linkage switch S2; the coils of auxiliary relays J11-J13 are respectively connected to A-phase trip signal input terminal A1, B-phase trip signal input terminal B1, and C-phase trip signal input terminal C1 , the other road is connected to the three-phase simultaneous trip signal input terminal T; the normally open point of the linkage switch S1, the normally closed point of the linkage switch S2, the normally open electric shock J11-1 of the auxiliary relay J11, and the coil of the time relay T11 are connected in series in sequence Between +24V and the ground, the normally open electric shock J12-1 of the auxiliary relay J12 and the coil of the time relay T12 are connected in series between the normally closed point of the linkage switch S2 and the node b of the normally open electric shock J11-1 and the ground. The normally open electric shock J13-1 of the auxiliary relay J13 and the coil of the time relay T13 are connected in series between node b and the ground; the resistor R11 and the normally closed electric shock T11-1 of the time relay T11 are connected in series between +24V and the ground , its node is the A-phase trip signal output terminal AT; it is the resistor R12, the normally closed electric shock T12-1 of the time relay T12 is connected in series between +24V and the ground, and its node is the B-phase trip signal output terminal BT; the resistor R13 , The normally closed electric shock T13-1 of the time relay T13 is connected in series between +24V and the ground, and its node is the C-phase trip signal output terminal CT; the closing unit 2 has the same structure as the tripping unit 1, and the closing unit 2 is controlled by the time Composed of relays T21-T23, auxiliary relays J21-J23, resistors R21-R23, linkage switch S1 and linkage switch S2; the coils of auxiliary relays J21-J23 are respectively connected to the A-phase closing signal input terminal A2 and B-phase closing signal input terminal B2 , C-phase closing signal input terminal C2, and the other is connected to the three-phase simultaneous closing signal input terminal H; the output terminals of the closing unit 2 are A-phase closing signal output terminal AH, B-phase closing signal output terminal AH, and C-phase closing signal output terminal AH. Gate signal output terminal AH. The model of time relay T11-T13 and time relay T21-T23 is DAA01C; the model of auxiliary relay J11-J13 and auxiliary relay J21-J23 is RXM4AB1BD; the model of linkage switch S1 and linkage switch S2 is KAN-9.

The working principle of the present invention is:

During the test, the input terminal of this embodiment comes from the protection device of the high-voltage circuit breaker. When performing a single-phase test (take A-phase tripping as an example), press the linkage switch S1, and the protection device of the high-voltage circuit breaker sends out a phase A trip signal To the input terminal A1, the auxiliary relay J11 coil is energized, the normally open electric shock J11-1 is closed, and when the power-on delay time of the time relay T11 is up, the normally closed electric shock T11-1 is disconnected, and then a trip is sent to the relay protection tester Signal; when performing a three-phase test (take three-phase closing as an example), press the linkage switch S2, the protection device of the high-voltage circuit breaker sends a three-phase closing signal to the input terminal H, and the coils of the auxiliary relay J21-J23 are all energized. The normally open electric contacts J21-1, J22-1, and J23-1 are all closed, and when the power-on delay time of the time relay T21-T23 is up, the normally open electric shocks T21-1, T22-1, and T23-1 are closed, and then to the relay The protection tester sends out a closing signal.

The above description is only proposed as an implementable technical solution of the present invention, and not as a single restriction on the technical solution itself.

Claims (2)

1. A three-phase portable analog circuit breaker is characterized in that: it comprises a trip unit (1) and a closing unit (2); The tripping unit (1) is composed of time relays T11-T13, auxiliary relays J11-J13, resistors R11-R13, linkage switch S1 and linkage switch S2; the coils of the auxiliary relays J11-J13 are respectively connected to the phase A trip signal Input terminal A1, B-phase trip signal input terminal B1, C-phase trip signal input terminal C1, and the other road is connected to the three-phase simultaneous trip signal input terminal T; the normally open point of the linkage switch S1 and the normally closed point of the linkage switch S2 , the normally open contact J11-1 of the auxiliary relay J11, and the coil of the time relay T11 are sequentially connected in series between +24V and the ground, the normally open contact J12-1 of the auxiliary relay J12, and the coil of the time relay T12 are connected in series Connected between the normally closed point of the linkage switch S2 and the node b of the normally open contact J11-1 and the ground, the normally open contact J13-1 of the auxiliary relay J13 and the coil of the time relay T13 are connected in series Between the node b and the ground; the resistor R11 and the normally closed contact T11-1 of the time relay T11 are connected in series between +24V and the ground, and the resistor R11 and the normally closed contact of the time relay T11 The node after T11-1 is connected in series is the A-phase trip signal output terminal AT; the resistor R12 and the normally closed contact T12-1 of the time relay T12 are connected in series between +24V and ground, and the resistor R12 and the time relay The node after the normally closed contact T12-1 of T12 is connected in series is the B-phase trip signal output terminal BT; the resistor R13 and the normally closed contact T13-1 of the time relay T13 are connected in series between +24V and ground, so The node after the resistor R13 is connected in series with the normally closed contact T13-1 of the time relay T13 is the phase C trip signal output terminal CT; The closing unit (2) has the same structure as the tripping unit (1), and the closing unit (2) is composed of time relays T21-T23, auxiliary relays J21-J23, resistors R21-R23, linkage switch S1 and linkage switch S2; One of the coils of the auxiliary relays J21-J23 is respectively connected to the A-phase closing signal input terminal A2, the B-phase closing signal input terminal B2, and the C-phase closing signal input terminal C2, and the other one is connected to the three-phase simultaneous closing signal input terminal H; The output terminals of the closing unit (2) are respectively the A-phase closing signal output terminal AH, the B-phase closing signal output terminal AH, and the C-phase closing signal output terminal AH. 2. A three-phase portable analog circuit breaker according to claim 1, characterized in that: the models of the time relays T11-T13 and time relays T21-T23 are all DAA01C; the auxiliary relays J11-J13, auxiliary The models of the relays J21-J23 are all RXM4AB1BD; the models of the linkage switch S1 and the linkage switch S2 are KAN-9.