Intelligent residual current reclosing circuit breaker

Abstract

The invention discloses an intelligent residual current reclosing circuit breaker. An electromotor (10), four conductive static contacts (2) and a zero-sequence mutual inductor (11) are arranged in a shell (13) of the intelligent residual current reclosing circuit breaker, external circuits A, B, C and N are respectively connected with the four static contacts (2), the electromotor (10) is connected with a gear assembly (9), the gear assembly (9) is connected with a connection rod assembly (8), the connection rod assembly (8) is connected with a handle (5), the handle (5) is connected with four conductive movable contacts (3), each conductive movable contact (3) is connected with a conductive conductor (7), each conductive conductor (7) is connected with an output terminal (12), the zero-sequence mutual inductor (11) is arranged next to the four conductive conductors (7), the conductive movable contacts (3) are connected with a spring (4), the spring (4) is connected with a tripper (6), and an intelligent control panel (1) is connected with the zero-sequence mutual inductor (11), the electromotor (10) and the tripper (6) respectively. The intelligent residual current reclosing circuit breaker has the advantages of small volume, a compact structure, high breaking capability and switching safety, and the reliability is improved.

Description

Technical field: [0001] The invention relates to an intelligent residual current reclosing circuit breaker, which belongs to the technical field of low-voltage power supply lines in the electric power industry. Background technique: [0002] The State Grid clearly stipulates the use of residual current circuit breakers in 400V low-voltage lines as an indirect measure to protect personal electric shock safety. When there is leakage in the line, the circuit breaker will automatically break the protection. [0003] In order to ensure the electricity consumption of residents, it is required to implement dual transformer power supply in the newly renovated station area, and the capacity of each transformer can meet the electricity consumption of the entire station area. But the two transformers come from two 10KV power sources, and a dual power switching device is installed between the low-voltage sides of the two transformers. Usually, each transformer works at half load, whic...

AI Technical Summary

Problems solved by technology

[0004] However, when the smart leakage circuit breakers currently on the market open and close, they only open and close the three live wires A / B / C, and the neutral line N at the input and output ends is always in a connected state.

In the low-voltage station area line that adopts dual power supply automatic switching, since the neutral line N is not cut off, it is easy to generate instantaneous overcurrent, damage the intelligent leakage circuit breaker, and cause power failure in the power supply area

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