Protection controller for opening coil and closing coil of vacuum circuit breaker and method

Abstract

The invention relates to a protection controller for an opening coil and a closing coil of a vacuum circuit breaker and a method. The protection controller for the opening coil and the closing coil of the vacuum circuit breaker comprises binding posts, an opening signal indicating light, a closing signal indicating light, and a main control opening and closing circuit board. The main control opening and closing circuit board comprises a main opening control chip, a main closing control chip, an opening power supply rectification unit, a closing power supply rectification unit, a time-delay outage circuit, an opening voltage detection unit, a closing voltage detection unit, an opening coil driving electronic switch and a closing coil driving electronic switch. The time-delay outage circuit and a coil disconnection indicating unit are connected to the main control chips. The opening coil driving electronic switch is connected with the main opening control chip through the time-delay outage circuit. The closing coil driving electronic switch is connected to the main closing control chip through the time-delay outage circuit. The opening power supply rectification unit is connected to the main opening control chip through the opening voltage detection unit. The closing power supply rectification unit is connected to the main closing control chip through the closing voltage detection unit. The coil disconnection indicating unit is respectively connected to the opening signal indicating light and the closing signal indicating light. The protection controller for the opening coil and the closing coil of the vacuum circuit breaker and the method solve the technical problem that the opening coil and the closing coil often burn out.

Description

technical field [0001] The invention relates to the technical field of vacuum circuit breaker protection, in particular to a secondary circuit protection device for protecting the opening and closing coils of a high-voltage circuit breaker, and more specifically to a protection controller for the opening and closing coils of a medium-voltage vacuum circuit breaker and methods. Background technique [0002] In the opening and closing circuits of the existing vacuum circuit breakers, the opening and closing coils often burn out, which brings a lot of trouble to the relay protection work. The cause of the failure is caused by the following points: 1. The circuit breaker The operating mechanism is stuck and refuses to move; 2. The auxiliary contact is stuck due to long-term use, insufficient capacity, arcing, etc.; 3. The position of the auxiliary contact does not completely correspond to the position of the switch state, and the action is not coordinated properly. The above si...

AI Technical Summary

Problems solved by technology

[0002] In the opening and closing circuits of the existing vacuum circuit breakers, the opening and closing coils often burn out, which brings a lot of trouble to the relay protection work. The cause of the failure is caused by the following points: 1. The circuit breaker The operating mechanism is stuck and refuses to move; 2. The auxiliary contact is stuck due to long-term use, insufficient capacity, arcing, etc.; 3. The position of the auxiliary contact does not completely correspond to the position of the switch state, and the action is not properly coordinated.

The above situations will cause the opening and closing current to act on the opening and closing coils for a long time, and even cause the coils to burn out, affecting safe and reliable power supply

In addition, the application of automatic control technology is becoming more and more common nowadays. The opening and closing of the switch mostly adopts the remote control mode. Once the opening and closing failure occurs, not only the coil will be burned, but other equipment will be involved, which will further expand the accident and cause greater losses.

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