Simulation high-voltage circuit breaker for testing protection device

Abstract

The utility model discloses a simulation high-voltage circuit breaker used for testing a protection device. The simulation high-voltage circuit breaker comprises a magnetic latching relay KKJ, a direct-current contactor TWJ1, a direct-current contactor TWJ2, a position detection relay KA, a closing coil HQ, a tripping coil TQ, a closing indicating lamp HR and a separating indicating lamp HG. The circuit breaker testing device can simulate a real circuit breaker to complete testing work, test noise is reduced, and test cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-voltage circuit breakers, and in particular relates to a simulated high-voltage circuit breaker used for testing a protection device. Background Art

[0002] In modern power systems, microcomputer protection devices are widely used. The protection devices generally integrate control circuits for controlling high-voltage circuit breakers. Before leaving the factory, it is necessary to test whether the control circuits can work normally. This can be done with a real version of a circuit breaker, but the noise when the circuit breaker is opened and closed is too loud, and the circuit breaker also has a mechanical life, which greatly increases the cost of testing. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art methods, the purpose of the utility model is to provide a simulated high-voltage circuit breaker for use in testing a protection device, which can simulate a real circuit breaker to complete the test work, reduce test noise, and reduce test costs.

[0004] To achieve the above purpose, the utility model adopts a technical solution: a simulated high-voltage circuit breaker for testing a protection device, comprising: a magnetic latching relay KKJ, a DC contactor TWJ1, a DC contactor TWJ2, a position detection relay KA, a closing coil HQ, a tripping coil TQ, a closing position indicator light HR and a breaking position indicator light HG;

[0005] The normally open contacts of the magnetic latching relay KKJ are connected to the coil of the DC contactor TWJ2 and the coil of the position detection relay KA respectively;

[0006] The closing entrance is connected to the coil of DC contactor TWJ1 through the normally closed contact of DC contactor TWJ2;

[0007] The jump monitoring input is connected to the closing coil HQ and the first coil of the magnetic latching relay KKJ through the normally closed contact of the DC contactor TWJ2;

[0008] The normally open contacts of the DC contactor TWJ1 are connected to the closing coil HQ and the first coil of the magnetic latching relay KKJ respectively;

[0009] The closing position monitoring input is connected to the second coil of the magnetic holding relay KKJ and the tripping coil TQ respectively;

[0010] The normally closed contact of the position detection relay KA and the closing position indicator light HR are connected to form a closing position branch, and the connection point between the normally closed contact of the position detection relay KA and the closing position indicator light HR is connected to the closing position terminal;

[0011] The normally open contact of the position detection relay KA and the position indicator light HG are connected to form a switch-off position branch, and the connection between the normally open contact of the position detection relay KA and the position indicator light HG is connected to the switch-off position terminal;

[0012] The normally open contacts of the magnetic holding relay KKJ, the normally open contacts of the DC contactor TWJ1, the normally closed contacts of the position detection relay KA and the front end of the normally open contacts of the position detection relay KA are connected to the power signal +KM; the coil of the position detection relay KA, the coil of the DC contactor TWJ2, the coil of the DC contactor TWJ1, the first coil of the magnetic holding relay KKJ, the second coil of the magnetic holding relay KKJ, the closing coil HQ, the tripping coil TQ, the closing position indicator light HR and the opening position indicator light HG are connected to the power signal -KM at the rear end.

[0013] The beneficial effects of adopting this technical solution are:

[0014] The utility model utilizes a magnetic latching relay KKJ, a DC contactor TWJ1, a DC contactor TWJ2, a position detection relay KA, a closing coil HQ, a tripping coil TQ, a closing position indicator light HR and a opening position indicator light HG to form a simulated circuit breaker, and cooperates with the test work of the protection device to truly simulate the circuit breaker to complete the test work, while avoiding the high noise of the high-voltage circuit breaker during the test process and extending the service life of the high-voltage circuit breaker, thereby greatly reducing the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a structural schematic diagram of a simulated high-voltage circuit breaker used for testing a protection device. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described below with reference to the accompanying drawings.

[0017] In this embodiment, see Figure 1 As shown, a simulated high-voltage circuit breaker for testing a protection device includes: a magnetic latching relay KKJ, a DC contactor TWJ1, a DC contactor TWJ2, a position detection relay KA, a closing coil HQ, a tripping coil TQ, a closing position indicator light HR, and an opening position indicator light HG;

[0018] The normally open contacts of the magnetic latching relay KKJ are connected to the coil of the DC contactor TWJ2 and the coil of the position detection relay KA respectively;

[0019] The closing entrance is connected to the coil of DC contactor TWJ1 through the normally closed contact of DC contactor TWJ2;

[0020] The jump monitoring input is connected to the closing coil HQ and the first coil of the magnetic latching relay KKJ through the normally closed contact of the DC contactor TWJ2;

[0021] The normally open contacts of the DC contactor TWJ1 are connected to the closing coil HQ and the first coil of the magnetic latching relay KKJ respectively;

[0022] The closing position monitoring input is connected to the second coil of the magnetic holding relay KKJ and the tripping coil TQ respectively;

[0023] The normally closed contact of the position detection relay KA and the closing position indicator light HR are connected to form a closing position branch, and the connection point between the normally closed contact of the position detection relay KA and the closing position indicator light HR is connected to the closing position terminal;

[0024] The normally open contact of the position detection relay KA and the position indicator light HG are connected to form a switch-off position branch, and the connection between the normally open contact of the position detection relay KA and the position indicator light HG is connected to the switch-off position terminal;

[0025] The normally open contacts of the magnetic holding relay KKJ, the normally open contacts of the DC contactor TWJ1, the normally closed contacts of the position detection relay KA and the front end of the normally open contacts of the position detection relay KA are connected to the power signal +KM; the coil of the position detection relay KA, the coil of the DC contactor TWJ2, the coil of the DC contactor TWJ1, the first coil of the magnetic holding relay KKJ, the second coil of the magnetic holding relay KKJ, the closing coil HQ, the tripping coil TQ, the closing position indicator light HR and the opening position indicator light HG are connected to the power signal -KM at the rear end.

[0026] In order to better understand the present invention, the following is a complete description of the working principle of the present invention:

[0027] Simulate the closing process of the circuit breaker: the closing signal enters the normally closed contact of TWJ2 through the closing entrance, and then the coil of the TWJ1 contactor is energized, the normally open contact of TWJ1 is closed, the closing coil HQ is energized, and at the same time, the coil of relay KKJ1 is energized, the normally open contact of relay KKJ is closed, and the coil of contactor TWJ2 is energized, thereby disconnecting the normally closed contact of TWJ2, de-energizing the coil of TWJ1, disconnecting the normally open contact of TWJ, and de-energizing the closing coil HQ, and the closing process is completed.

[0028] Simulate the circuit breaker opening process: During the closing process of the circuit breaker, the normally open contact of relay KKJ is closed, so that the coil of the TWJ2 contactor is energized and the normally open contact of TWJ2 is closed. The trip signal reaches the normally open contact of TWJ2 through the trip entrance, and then enters the TQ trip coil and the coil of the KKJ2 relay. The normally open contact of KKJ is disconnected, the coil of TWJ2 loses voltage, the normally open contact of TWJ2 is disconnected, the trip coil TQ loses power, and the trip process is completed.

[0029] Jump monitoring: The jump monitoring signal enters the jump monitoring entrance and is connected to the positive end of the closing coil HQ through the normally closed contact of TWJ2. If the closing coil HQ is not broken at this time, the power signal -KM will be sent to the microcomputer protection device through the normally closed contact of TWJ2 to detect whether the closing coil is broken.

[0030] Closing position monitoring: The closing position monitoring signal is directly connected to the positive end of the tripping coil TQ through the closing position monitoring entrance. If the tripping coil TQ is broken, the -KM power supply signal cannot pass through TQ to send the signal to the input signal of the microcomputer protection device. At this time, it is determined that the tripping coil TQ is broken, and a prompt is displayed on the microcomputer protection device to facilitate the staff to replace the coil in time.

[0031] Opening position: When opening, the KKJ2 coil is energized, the normally open contact of KKJ is disconnected, thereby de-energizing the KA relay, and the normally closed contact of KA is closed. The opening indicator light HG is connected and lights up, and the opening position signal is sent to the opening position terminal.

[0032] Closing position: When closing, the closing position entrance receives the opening signal, the KKJ1 coil is energized, the KKJ normally open contact is closed, so that the relay KA is energized, the normally open contact of KA is closed, the closing indicator light HR is turned on and lights up, and the closing position signal is sent to the closing position terminal.

[0033] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A simulated high-voltage circuit breaker for testing a protection device, characterized in that: include: Magnetic latching relay KKJ, DC contactor TWJ1, DC contactor TWJ2, position detection relay KA, closing coil HQ, tripping coil TQ, closing position indicator light HR and opening position indicator light HG; The normally open contacts of the magnetic latching relay KKJ are connected to the coil of the DC contactor TWJ2 and the coil of the position detection relay KA respectively; The closing entrance is connected to the coil of DC contactor TWJ1 through the normally closed contact of DC contactor TWJ2; The jump monitoring input is connected to the closing coil HQ and the first coil of the magnetic latching relay KKJ through the normally closed contact of the DC contactor TWJ2; The normally open contacts of the DC contactor TWJ1 are connected to the closing coil HQ and the first coil of the magnetic latching relay KKJ respectively; The closing position monitoring input is connected to the second coil of the magnetic holding relay KKJ and the tripping coil TQ respectively; The normally closed contact of the position detection relay KA and the closing position indicator light HR are connected to form a closing position branch, and the connection point between the normally closed contact of the position detection relay KA and the closing position indicator light HR is connected to the closing position terminal; The normally open contact of the position detection relay KA and the position indicator light HG are connected to form a switch-off position branch, and the connection between the normally open contact of the position detection relay KA and the position indicator light HG is connected to the switch-off position terminal; The normally open contacts of the magnetic holding relay KKJ, the normally open contacts of the DC contactor TWJ1, the normally closed contacts of the position detection relay KA and the front end of the normally open contacts of the position detection relay KA are connected to the power signal +KM; the coil of the position detection relay KA, the coil of the DC contactor TWJ2, the coil of the DC contactor TWJ1, the first coil of the magnetic holding relay KKJ, the second coil of the magnetic holding relay KKJ, the closing coil HQ, the tripping coil TQ, the closing position indicator light HR and the opening position indicator light HG are connected to the power signal -KM at the rear end.

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