CN202049657U - Simulation circuit breaker - Google Patents

Abstract

The utility model discloses a simulation circuit breaker, which comprises a relay JH, a relay JF, a relay J1 and a relay J2. Coils [JH-13, JH-14] of the relay JH are used for simulating a closing coil of a real circuit breaker; coils [JF-13, JF-14] of the relay JF are used for simulating a breaking coil of the real circuit breaker; normally closed contact points [J1-1, J1-9] of the relay J1 and normally closed contact points [J2-1, J2-9] of the relay J2 are used for simulating auxiliary contact points of the real circuit breaker. The simulation circuit breaker is particularly applicable to the teaching of relay protection experiments, and has the advantages of long service life, low cost, convenience in repair and maintenance, further, stability in working, and the like.

Description

simulated circuit breaker

technical field

The utility model relates to a simulated circuit breaker, in particular to a simulated circuit breaker used for relay protection experiment teaching. the

Background technique

When the power components (such as generators, electric lines, etc.) The circuit breaker issues a trip command to terminate these events. A circuit breaker is a switching device that can close, carry and break current under normal circuit conditions, and can close, carry and break current under abnormal circuit conditions (including short-circuit conditions) within a specified time. The circuit breaker is often used together with the relay protection device as the executive device of the relay protection action. The relay protection device obtains parameters such as current and voltage from the line to judge whether there is a fault in the line. If there is a fault, the relay protection device sends The signal is sent to the circuit breaker, and the operating mechanism of the circuit breaker acts to open the circuit breaker, thereby cutting off the faulty line or equipment, and protecting the electrical equipment. the

Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers. The circuit breaker is an indispensable device in the process of relay protection training and relay protection debugging. In relay protection experiment training and teaching, it is often necessary to use circuit breakers. In the current experimental system, experiments are carried out with real circuit breakers or with air switches instead of circuit breakers. In the high-voltage relay protection experiment, the cost of using a real circuit breaker is too high. For example, the price of the 35kV circuit breaker used in the 35kV relay protection experiment is generally about 200,000 yuan, which leads to the high cost of the experiment. When the air switch is used instead of the circuit breaker, the air switch is very poor in imitating the performance of the circuit breaker, and often cannot meet the requirements of the experiment. Therefore, there is a need for a component that is close to the circuit breaker in basic performance, low in price, light in weight, small in size and easy to operate, and can replace the real circuit breaker in the high-voltage relay protection experiment. the

Utility model content

The utility model provides a simulated circuit breaker in order to avoid the disadvantages of the above-mentioned prior art, so as to reduce the experimental cost while ensuring the teaching effect of the relay protection experiment. the

The utility model adopts the following technical solutions for solving technical problems. the

The structural characteristics of the simulated circuit breaker are that it includes relay JH, relay JF, relay J1 and relay J2; the coil of relay JH [JH-13, JH-14] is used to simulate the closing coil of a real circuit breaker, and the coil of relay JF [JF-13, JF-14] are used to simulate the trip coil of a real circuit breaker, the normally closed contacts of relay J1 [J1-1, J1-9] and the normally closed contacts of relay J2 [J2-1, J2-9] Auxiliary contacts for simulating real circuit breakers. the

The structural characteristics of the analog circuit breaker of the present utility model also lie in:

One end of JH-13 of the coil [JH-13, JH-14] of the relay JH is connected to the negative pole of the power supply-KM, and one end of JH-14 of the coil [JH-13, JH-14] of the relay JH The normally closed contact [J2-1, J2-9] of the relay J2 and the relay protection device are connected to the positive pole +KM of the power supply in turn; the JF- of the coil [JF-13, JF-14] of the relay JF One end of 13 is connected to the negative pole of the power supply -KM, and one end of JF-14 of the coil [JF-13, JF-14] of the relay JF passes through the normally closed contact [J1-1, J1-9] and The relay protection device is connected to the positive pole of the power supply +KM; the J1-13 end of the coil [J1-13, J1-14] of the relay J1 is connected to the negative pole of the power supply -KM; the normally open contact of the relay J1 [J1-8 , J1-12] is connected in parallel with the normally open contact [JF-8, JF-12] of the relay JF, and the connection point between the J1-12 end and the JF-12 end is connected with the coil of the relay J1 [J1-13, One end of J1-14 of J1-14] is connected, and the connection point between J1-8 and JF-8 is connected to the positive pole of the power supply +KM through the normally closed contact [JH-1, JH-9] of the relay JH Connection; one end of J2-13 of the coil [J2-13, J2-14] of the relay J2 is connected to the negative pole of the power supply -KM; the normally open contact [J2-8, J2-12] of the relay J2 is connected to the normal contact of the relay JH The open contacts [JH-8, JH-12] are connected in parallel, and the connection point between the J2-12 end and the JH-12 end is in phase with the J2-14 end of the coil [J2-13, J2-14] of the relay J2 Connection, the connection point between the J2-8 terminal and the JH-8 terminal is connected to the positive pole +KM of the power supply through the normally closed contact [JF-1, JF-9] of the relay JF. the

The normally open contacts [J2-6, J2-10] of the relay J2 and the normally open contacts [J1-6, J1-10] of the relay J1 are both connected to the opening and closing state display device. the

The coil of the relay JH includes two terminals JH-13 and JH-14. The normally closed contact of the relay JH is composed of two terminals JH-1 and JH-9. The normally open contact of the relay JH is composed of two terminals JH-8 and JH-12. The coil of the relay JF includes two terminals JF-13 and JF-14. The normally closed contact of the relay JF is composed of two terminals JF-1 and JF-9. The normally open contact of the relay JF is composed of two terminals JF-8 and JF-12. The coil of the relay J1 includes two terminals J1-13 and J1-14. The normally closed contact of the relay J1 is composed of two terminals J1-1 and J1-9. The first normally open contact of the relay J1 is composed of two terminals J1-8 and J1-12. The second normally open contact of the relay J1 is composed of two terminals J1-6 and J1-10. The coil of the relay J2 includes two terminals J2-13 and J2-14. The normally closed contact of the relay J2 is composed of two terminals J2-1 and J2-9. The first normally open contact of the relay J2 is composed of two terminals J2-8 and J2-12. The second normally open contact of the relay J2 is composed of two terminals J2-6 and J2-10. the

Compared with the prior art, the beneficial effects of the utility model are reflected in:

In the utility model, a relay with excellent working performance and low price is used as a core component to make a simulated circuit breaker. The relay used can theoretically work for 1 million times. The structure is simpler than that of a real circuit breaker, and maintenance is easy. Therefore, the utility model The analog circuit breaker has the advantages of long life, low price and stable operation. the

Description of drawings

Fig. 1 is a schematic diagram of the utility model analog circuit breaker. the

Labels in accompanying drawing 1: 1 relay protection device, 11 closing input end, 12 opening input end, 2 opening closing state display device. the

The utility model will be further described below through specific embodiments in conjunction with the accompanying drawings. the

Detailed ways

Referring to Figure 1, the simulated circuit breaker includes relay JH, relay JF, relay J1 and relay J2; the coil [JH-13, JH-14] of relay JH is used to simulate the closing coil of a real circuit breaker, and the coil of relay JF [JF -13, JF-14] are used to simulate the trip coil of a real circuit breaker, the normally closed contacts of relay J1 [J1-1, J1-9] and the normally closed contacts of relay J2 [J2-1, J2-9] are used Auxiliary contacts that simulate a real circuit breaker. the

One end of JH-13 of the coil [JH-13, JH-14] of the relay JH is connected to the negative pole of the power supply -KM, and one end of JH-14 of the coil [JH-13, JH-14] of the relay JH passes through the The normally closed contact [J2-1, J2-9] of the relay J2 and the relay protection device 1 are connected to the positive pole +KM of the power supply; wherein, one end of JH-14 is connected to the J2-9 end, and the J2-1 end is connected to On the closing input terminal 11 of the relay protection device 1 and through the relay protection device 1, it is connected to the positive pole +KM of the power supply. the

One end of JF-13 of the coil [JF-13, JF-14] of the relay JF is connected to the negative pole of the power supply -KM, and one end of JF-14 of the coil [JF-13, JF-14] of the relay JF passes through the The normally closed contact [J1-1, J1-9] of the relay J1 and the relay protection device 1 are connected to the positive pole +KM of the power supply; wherein, one end of JF-14 is connected to the J1-9 end, and the J1-1 end is connected to On the opening input terminal 12 of the relay protection device 1 and through the relay protection device 1, it is connected to the positive pole +KM of the power supply. the

One end of J1-13 of the coil [J1-13, J1-14] of the relay J1 is connected to the negative pole of the power supply -KM; the normally open contact [J1-8, J1-12] of the relay J1 is connected to the normally open contact of the relay JF [JF-8, JF-12] are connected in parallel, the connection point between the J1-12 terminal and the JF-12 terminal is connected to the J1-14 end of the coil [J1-13, J1-14] of the relay J1, The connection point between the J1-8 terminal and the JF-8 terminal is connected to the positive pole +KM of the power supply through the normally closed contact [JH-1, JH-9] of the relay JH; wherein, the J1-8 terminal is connected to the JF-8 terminal The J1-12 terminal is connected to the JF-12 terminal, so that the normally open contact [J1-8, J1-12] of the relay J1 is connected in parallel with the normally open contact [JF-8, JF-12] of the relay JF connected in the form; the connection point between J1-8 and JF-8 is connected to JH-9, and JH-1 is connected to the positive pole of the power supply +KM. the

One end of J2-13 of the coil [J2-13, J2-14] of the relay J2 is connected to the negative pole of the power supply -KM; the normally open contact [J2-8, J2-12] of the relay J2 is connected to the normally open contact of the relay JH [JH-8, JH-12] connected in parallel, the connection point between J2-12 and JH-12 is connected to one end of J2-14 of the coil [J2-13, J2-14] of the relay J2, The connection point between the J2-8 terminal and the JH-8 terminal is connected to the positive pole +KM of the power supply through the normally closed contact [JF-1, JF-9] of the relay JF. Among them, the terminal J2-8 is connected to the terminal JH-8, and the terminal J2-12 is connected to the terminal JH-12, so that the normally open contact [J2-8, J2-12] of the relay J2 and the normally open contact [J2-12] of the relay JF [ JH-8, JH-12] are connected in parallel; the connection point between J2-8 and JH-8 is connected to JF-9, and JF-1 is connected to the positive pole of the power supply +KM. the

The normally open contact [J2-6, J2-10] of the relay J2 and the normally open contact [J1-6, J1-10] of the relay J1 are all connected with the opening and closing state display device 2, and the opening and closing The state display device 2 displays the opening and closing state of the simulated circuit breaker, for example, a green light indicates that the circuit breaker is in an open state, and a red light indicates that the circuit breaker is in a closed state. the

After power-on, the analog circuit breaker is in the opening state, the coil [J1-13, J1-14] of relay J1 is charged, the coil [J2-13, J2-14] of relay J2 is not charged, and the normally closed contact of relay J2 [J2 -1, J2-9] closed. When the circuit breaker is in the opening state, press the closing input terminal of the relay protection device, the coil [JH-13, JH-14] of the relay JH is charged, and the normally closed contact [JH-1, JH] of the relay JH -9] opens, the coil [J1-13, J1-14] of the relay J1 loses power, thereby returning; the normally open contact [JH-8, JH-12] of the relay JH closes, and the coil [J2-13] of the relay J2 , J2-14] charged, so that the relay J2 action; due to the action of the relay J2, the normally open contact [J2-8, J2-12] of the relay J2 is closed, so that the relay J2 is self-maintained, and the normally closed contact of J2 [J2-1, J2-9] are always open. The normally closed contact [J2-1, J2-9] of the relay J2 is opened, and the normally closed contact [J1-1, J1-9] of the relay J1 is closed, thereby simulating the closed state of the circuit breaker. Since J2 is self-maintaining, its normally open contact [J2-6, J2-10] is always closed, and the normally open contact [J2-6, J2-10] is connected to the opening and closing status display device 2 to indicate that the circuit breaker is in the closed state. gate status. the

When the analog circuit breaker is in the closed state, the coil [J2-13, J2-14] of relay J2 is charged, the coil [J1-13, J1-14] of relay J1 is not charged, and the normally closed contact [J1- 1, J1-9] closed. When the circuit breaker is in the closed state, press the opening switch, the coil [JF-13, JF-14] of the relay JF is charged, and the normally closed contact [JF-1, JF-9] of JF is opened, and the relay The coil of J2 [J2-13, J2-14] is de-energized, thereby returning relay J2; the normally open contact of JF [JF-8, JF-12] is closed, and the coil of relay J1 [J1-13, J1-14] When charged, J1 acts, and the normally open contact [J1-8, J1-12] of J1 is closed, so that the relay J1 is self-maintained, and the normally closed contact [J1-1, J1-9] of J1 is always open. The normally closed contact [J1-1, J1-9] of the relay J1 is opened, and the normally closed contact [J2-1, J2-9] of the relay J2 is closed, thereby simulating the opening state of the circuit breaker. Since J1 is self-maintaining, its normally open contact [J1-6, J1-10] is always closed, and the normally open contact [J1-6, J1-10] is connected to the opening and closing state display device 2 to indicate that the circuit breaker is in the opening state. gate status. the

The analog circuit breaker of the utility model has the following advantages:

1. Small size, light weight, no space occupation, easy to use;

2. The price is cheap, compared with the hundreds of thousands of circuit breakers, the price is completely negligible;

3. Easy maintenance. The structure of the analog circuit breaker is much simpler than that of the circuit breaker, and it is easy to maintain. the

Form 1: MDL-02 circuit breaker test data and evaluation report;

The data in Table 1 is the test data obtained when the simulated circuit breaker produced by Omron's MY4J relay is used for the 35kV relay protection simulation test. In this simulation test, a total of 18 simulated circuit breakers are needed. The cost of each simulated circuit breaker is less than 500 yuan, and the total price of 18 simulated circuit breakers is less than 10,000 yuan. Millions of dollars. It can be seen from the above test data that the simulated circuit breaker of the utility model can replace the real circuit breaker in relay protection experiment training and teaching, and has the advantages of long life, low price and stable operation. the

Claims (3)

1. The analog circuit breaker is characterized in that it includes relay JH, relay JF, relay J1 and relay J2; the coil of relay JH is used to simulate the closing coil of a real circuit breaker, and the coil of relay JF is used to simulate the tripping of a real circuit breaker The coil, the normally closed contact of relay J1 and the normally closed contact of relay J2 are used to simulate the auxiliary contacts of a real circuit breaker. 2. The simulated circuit breaker according to claim 1, wherein one end of JH-13 of the coil of the relay JH is connected to the negative pole of the power supply -KM, and one end of JH-14 of the coil of the relay JH passes through the The normally closed contact of the relay J2 and the relay protection device (1) are connected with the positive pole +KM of the power supply; One end of JF-13 of the coil of the relay JF is connected to the negative pole-KM of the power supply, and one end of JF-14 of the coil of the relay JF passes through the normally closed contact of the relay J1 and the relay protection device (1) and the power supply successively. Positive +KM connected; The J1-13 end of the coil of the relay J1 is connected to the negative pole of the power supply -KM; the first normally open contact of the relay J1 is connected in parallel with the normally open contact of the relay JF, and the connection between the J1-12 end and the JF-12 end The point is connected to one end of J1-14 of the coil of the relay J1, and the connection point between the J1-8 end and the JF-8 end is connected to the positive pole +KM of the power supply through the normally closed contact of the relay JH; The J2-13 end of the coil of the relay J2 is connected to the negative pole of the power supply -KM; the first normally open contact of the relay J2 is connected in parallel with the normally open contact of the relay JH, and the connection between the J2-12 end and the JH-12 end The point is connected to one end of J2-14 of the coil of the relay J2, and the connection point between the J2-8 end and the JH-8 end is connected to the positive pole +KM of the power supply through the normally closed contact of the relay JF. 3. The simulated circuit breaker according to claim 1, wherein the second normally open contact of the relay J2 and the second normally open contact of the relay J1 are both connected to the opening and closing state display device (2). the