A circuit breaker opening and closing full state monitoring device
A circuit breaker and closing circuit technology, which is applied to the state monitoring of the circuit breaker in the power system, the closing full state monitoring device, and the circuit breaker in different fields, so as to achieve the effects of fast response, preventing circuit interference, and avoiding monitoring blind spots
Active Publication Date: 2017-10-03
ANSHAN POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER COMPANY +2
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Problems solved by technology
At present, research in this area has not yet started in the field of circuit breakers at home and abroad.
Method used
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[0015] The present invention will be described in detail below in conjunction with the accompanying drawings, but it should be pointed out that the implementation of the present invention is not limited to the following embodiments.
[0016] See Figure 1-Figure 3 , a circuit breaker opening and closing full state monitoring device, including a photoelectric signal acquisition module MC, a voltage acquisition circuit, an alarm relay circuit, a casing and an output terminal, and the specific monitoring circuit structure is:
[0017] The voltage acquisition circuit is composed of resistor R2 and resistor R3. The alarm relay return circuit is mainly composed of relay KA and resistor R1. The output terminal is set on the panel of the shell. One end of resistor R2 is connected to the output terminal K1 set on the shell. The resistor R2 The other end is connected to one end of the resistor R3, the negative pole of the Zener diode D, and pin 1 of the photoelectric signal acquisition ...
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The invention relates to a circuit breaker opening and closing full state monitoring device, which monitors the potential changes at both ends of the auxiliary contacts of the opening and closing circuit circuit breaker through the photoelectric signal acquisition module MC to judge whether the operating state of the opening and closing circuit is correct, and the photoelectric signal The output of the acquisition module MC controls the on-off of the relay KA, and leads out the auxiliary contact of the relay KA, which is used for the state indication and state alarm of the opening and closing circuit. The advantages of the present invention are: accurately monitor the full operation state of the circuit breaker opening and closing circuit, and avoid monitoring blind spots; based on the photoelectric collection technology, it has the function of photoelectric isolation to prevent circuit interference; based on the photoelectric collection technology, the signal collection is correct and reliable, and the response speed is fast ; The sampling circuit current is small (less than 2mA), which will not affect the normal operation of the original opening and closing circuit position relay, reducing the probability of accidents.
Description
technical field [0001] The invention relates to a state monitoring device of a circuit breaker in a power system, a circuit breaker opening and closing state monitoring device. Background technique [0002] There are too many circuit breakers in operation (closed state) in the power system, and the alarm signal cannot be sent when the closing circuit fails (the circuit breaker cannot monitor the integrity of the closing circuit in the closed state). When the reclosing action circuit breaker fails to close, the accident is further expanded; the circuit breaker in standby (open state), when the opening circuit fails, the alarm signal cannot be sent (the circuit breaker cannot monitor the opening circuit in the open state) Integrity), when the standby circuit breaker (opening state) is put into system operation (circuit breaker closed), an alarm signal is sent (the circuit breaker can monitor the integrity of the opening when the circuit breaker is closed), and the operating ci...
Claims
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IPC IPC(8): G01R31/327
Inventor 付振强孙道军赵睿崔奇明周志玉李旭阳王枫胡宇先王彦明张鸣
Owner ANSHAN POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER COMPANY