High-voltage circuit breaker simulation test device

Abstract

The utility model discloses a simulation test device for a high-voltage circuit breaker, and the device comprises three-phase loops A, B, and C. Two ends of the three-phase loops A, B, and C are respectively connected with a circuit breaker tester, and the three-phase loops A, B, and C are provided with first main switches for controlling the three-phase loops. A phase A, a phase B and a phase C of the three-phase loop are respectively connected in parallel with a first simulation loop, a second simulation loop and a third simulation loop, and the first simulation loop, the second simulation loop and the third simulation loop are provided with second main switches for controlling on-off. The simulation loop comprises two loops which are connected in parallel, one loop is composed of a contactor and an equivalent closing resistor which are connected in series, and the other loop is composed of a contactor and an equivalent arc contact resistor which are connected in series; the device can simulate opening and closing of a circuit breaker, switching-on and switching-off of a switching-on resistor, and opening and closing of a main contact and an arc contact, and can cooperate with related test equipment to carry out a switch operation characteristic test under large current.

Description

Technical Field

[0001] The utility model belongs to the technical field of relay protection, and particularly relates to a high-voltage circuit breaker simulation test device. Background Technique

[0002] In the existing simulated circuit breakers, small-current contactors are used to simulate the circuit breaker contacts, mainly for testing the metering function of circuit breaker testers; the rated current of high-voltage circuit breakers is relatively large, and using contactors for simulation cannot fully reflect the particularity of the test, and the arc extinguishing process, switching-on resistor switching, etc. of the circuit breaker cannot be accurately simulated; therefore, it is necessary to design a high-voltage circuit breaker simulation test device to solve the above problems. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a high-voltage circuit breaker simulation test device, which can simulate the opening and closing of the circuit breaker, the input and output of the closing resistor, the opening and closing of the main contact and the arcing contact, and can cooperate with relevant test equipment to test the switching action characteristics under large current.

[0004] To achieve the above technical effects, the technical solution adopted by the utility model is:

[0005] A high-voltage circuit breaker simulation test device includes three-phase circuits A, B, and C. The two ends of the three-phase circuits A, B, and C are respectively connected to a circuit breaker tester, and the three-phase circuits A, B, and C are provided with a first main switch to control the three-phase circuits; the A, B, and C phases of the three-phase circuits are respectively connected in parallel with a first simulation circuit, a second simulation circuit, and a third simulation circuit, and the first simulation circuit, the second simulation circuit, and the third simulation circuit are provided with a second main switch to control the on-off.

[0006] Further, both the first main switch and the second main switch are selected from three-phase medium-voltage distribution switches of 35 kV and below or three-phase low-voltage distribution switches of 400 V, with a rated current of more than 1000 A.

[0007] Preferably, the first simulation circuit includes two parallel circuits. One circuit is composed of a first contactor and a first equivalent closing resistor connected in series, and the other circuit is composed of a second contactor and a first equivalent arcing contact resistor connected in series.

[0008] Preferably, the second simulation circuit includes two parallel circuits. One circuit is composed of a third contactor and a second equivalent closing resistor connected in series, and the other circuit is composed of a fourth contactor and a second equivalent arcing contact resistor connected in series.

[0009] Preferably, the third simulation circuit includes two parallel circuits. One circuit is composed of a fifth contactor and a third equivalent closing resistor connected in series, and the other circuit is composed of a sixth contactor and a third equivalent arcing contact resistor connected in series.

[0010] Further, the equivalent closing resistor is selected as the commonly used closing resistor of high-voltage circuit breakers; the equivalent arcing contact resistor is connected using commonly used arcing contacts.

[0011] Further, the contactor is a single-phase high-current contactor.

[0012] Preferably, the first main switch is connected in series with the start button, and the second main switch is connected in series with the time relay.

[0013] The beneficial effects of the present utility model are as follows:

[0014] The present invention designs a large-current circuit breaker test simulation device, which changes the situation in the past where the simulated circuit breaker could only test signals and could not be tested with a relatively high current. It has an over-current capacity of more than 1000A, which is more accurate and powerful for the research of circuit breaker test technology and the inspection of test equipment. It can simultaneously simulate two common high-voltage circuit breaker forms: the switching of closing resistors and the switching of main and arcing contacts, and the current is close to the operating value. Description of the Drawings

[0015] Figure 1 is a schematic circuit structure diagram of the present utility model;

[0016] Figure 2 is a schematic diagram of the control of the main switches Q1 and Q2 in the present utility model;

[0017] Figure 3 is a schematic diagram of the external interfaces and buttons of the present utility model;

[0018] Figure 4 is a schematic diagram of the principle of closing resistor input in the present utility model;

[0019] Figure 5 is a schematic circuit diagram of the arcing contact input in the present utility model;

[0020] In the figure: the first main switch Q1, the second main switch Q2, the first contactor S1, the second contactor S2, the third contactor S3, the fourth contactor S4, the fifth contactor S5, the sixth contactor S6, the first equivalent closing resistor R1, the second equivalent closing resistor R2, the third equivalent closing resistor R3, the first equivalent arcing contact resistor r1, the second equivalent arcing contact resistor r2, the third equivalent arcing contact resistor r3, the start button S, and the time relay T. Detailed Implementation Manner

[0021] As Figure 1As shown in the figure, a high-voltage circuit breaker simulation test device includes three-phase circuits A, B, and C. Circuit breaker testers are respectively connected to both ends of the three-phase circuits A, B, and C. A first main switch Q1 is provided in the three-phase circuits A, B, and C to control the three-phase circuits. The A, B, and C phases of the three-phase circuits are respectively connected in parallel with a first simulation circuit, a second simulation circuit, and a third simulation circuit. A second main switch Q2 is provided in the first simulation circuit, the second simulation circuit, and the third simulation circuit to control the on-off.

[0022] Further, the main switches Q1 and Q2 are three-phase medium-voltage distribution switches of 35 kV and below or three-phase low-voltage distribution switches of 400 V, with a rated current of more than 1000 A.

[0023] Preferably, the first simulation circuit includes two parallel circuits. One circuit is composed of a first contactor S1 and a first equivalent closing resistor R1 connected in series, and the other circuit is composed of a second contactor S2 and a first equivalent arcing contact resistor r1 connected in series.

[0024] Preferably, the second simulation circuit includes two parallel circuits. One circuit is composed of a third contactor S3 and a second equivalent closing resistor R2 connected in series, and the other circuit is composed of a fourth contactor S4 and a second equivalent arcing contact resistor r2 connected in series.

[0025] Preferably, the third simulation circuit includes two parallel circuits. One circuit is composed of a fifth contactor S5 and a third equivalent closing resistor R3 connected in series, and the other circuit is composed of a sixth contactor S6 and a third equivalent arcing contact resistor r3 connected in series.

[0026] Further, the equivalent closing resistor is a commonly used closing resistor for high-voltage circuit breakers; the equivalent arcing contact resistor adopts a commonly used arcing contact connection.

[0027] Further, S1~S6 are single-phase high-current contactors.

[0028] As Figure 2 shown, preferably, the first main switch Q1 is connected in series with the start button S, and the second main switch Q2 is connected in series with the time relay T.

[0029] As Figure 3 shown, further, the outer surface of the high-voltage circuit breaker simulation test device is provided with a plurality of interfaces and control buttons; the interfaces include the interfaces ABC and abc at both ends of the three-phase circuits, and the interfaces also include a control signal input interface and a control signal output interface for docking with relevant test equipment; the control buttons include the button of the start button S and the buttons of the contactors S1~S6.

[0030] The working principle of the above-mentioned high-voltage circuit breaker simulation test device is as follows:

[0031] As Figure 4As shown, simulate the switching on and off of closing resistors:

[0032] When Q1 and Q2 are in the open state, press S1, S3, and S5, the closing resistor R is switched in. Set the delay time of the time relay, for example, 8 milliseconds. Press the start switch S, Q1 and Q2 are switched on simultaneously. After the time elapses, Q2 is switched out, and the test equipment displays the test data.

[0033] As Figure 5 shown, simulate the switching on and off of arcing contacts:

[0034] When Q1 and Q2 are in the closed state, press S2, S4, and S6, the arcing contact r is switched in. Set the delay time of the time relay, for example, 8 milliseconds. Press the start switch S, Q1 is switched off first. After the time elapses, Q2 is switched out, and the test equipment displays the test data.

Claims

1. A high-voltage circuit breaker simulation test device, comprising three-phase circuits A, B, and C, wherein two ends of the three-phase circuits A, B, and C are respectively connected to a circuit breaker tester, characterized in that: The three-phase circuits A, B, and C are provided with a first main switch Q1 to control the three-phase circuits; the A, B, and C phases of the three-phase circuits are respectively connected in parallel with the first analog circuit, the second analog circuit, and the third analog circuit, which are provided with a second main switch Q2 to control on and off.

2. A high voltage circuit breaker simulation test device according to claim 1, characterized in that: The first simulation circuit includes two circuits connected in parallel, one circuit is composed of a first contactor S1 and a first equivalent closing resistor R1 connected in series, and the other circuit is composed of a second contactor S2 and a first equivalent arc contact resistor r1 connected in series.

3. A high voltage circuit breaker simulation test device according to claim 1, characterized in that: The second simulation circuit includes two circuits connected in parallel, one circuit is composed of a third contactor S3 and a second equivalent closing resistor R2 connected in series, and the other circuit is composed of a fourth contactor S4 and a second equivalent arc contact resistor r2 connected in series.

4. A high voltage circuit breaker simulation test device according to claim 1, characterized in that: The third simulation circuit includes two circuits in parallel, one circuit is composed of the fifth contactor S5 and the third equivalent closing resistor R3 connected in series, and the other circuit is composed of the sixth contactor S6 and the third equivalent arc contact resistor r3 connected in series.

5. A high voltage circuit breaker simulation test device according to claim 1, characterized in that: The first main switch Q1 is connected in series with the start button S, and the second main switch Q2 is connected in series with the time relay T.

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