Vacuum circuit breaker

Abstract

The invention discloses a vacuum circuit breaker which comprises a contact arm, a Rogowski coil mutual inductor, an intelligent overcurrent tripping device, a tripping mechanism, an infrared transmitter and an infrared receiver, wherein the intelligent overcurrent tripping device comprises a CPU; the Rogowski coil mutual inductor is arranged in the contact arm, and the output end of the Rogowski coil mutual inductor is connected with the intelligent overcurrent tripping device by a signal wire; collected current signals and voltage signals are transmitted to the intelligent overcurrent tripping device in real time after being processed by the CPU; the output end of the intelligent overcurrent tripping device is also connected with the infrared transmitter, a communication interface of theinfrared receiver is connected with a supervisory computer by an output signal wire, and the current signals and the voltage signals transmitted by the infrared transmitter are transmitted to the supervisory computer. The invention combines the vacuum circuit breaker and the mutual inductor into a whole and can effectively reduce the volume of a power distribution cabinet, is simple and convenientto maintain the mutual inductor, can realize long-distance telemetering and remote control and ensure the safe electricity utilization of loads.

Description

technical field [0001] The invention relates to a safety protection device for a power distribution cabinet, in particular to a circuit breaker protection device for overvoltage and overcurrent, and belongs to the technical field of power transmission and distribution safety devices. Background technique [0002] Vacuum circuit breaker is named for its arc extinguishing medium and the insulating medium of the contact gap after arc extinguishing are both high vacuum; it has the advantages of small size, light weight, suitable for frequent operation, and no maintenance for arc extinguishing. It is currently used in power distribution It is widely used in network / distribution cabinets. Existing vacuum circuit breakers are generally not equipped with intelligent protection devices, and only in the power distribution cabinet factory can they be equipped with current transformers and comprehensive protection devices. Among them, the volume of the current transformer changes with ...

AI Technical Summary

Problems solved by technology

However, the opening and closing of the circuit breaker is mainly realized by manpower operation of the mechanical device. Although the electronic intelligent controller can be used to protect and control the vacuum circuit breaker, because it is not equipped with a CPU, it is impossible to monitor the collected current and voltage. Analyze and compare the signals, and issue an instruction to open the gate; it is also impossible to transmit the monitoring data to the host computer to realize remote monitoring

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