Electric energy meter external circuit breaker and N-pole arc-free breaking method thereof

Abstract

The invention provides an electric energy meter external circuit breaker. The circuit breaker comprises a standard miniature circuit breaker and a zero line circuit breaker. Driving handles of the standard miniature circuit breaker and the zero line circuit breaker are linked with each other. A static contact is arranged in the zero line circuit breaker. A moving contact driven by the driving handle is arranged in a zero line circuit breaker shell. The moving contact is in butt joint with the static contact before the standard miniature circuit breaker is connected with a live wire in a strokethat the driving handle makes the standard miniature circuit breaker and the zero line circuit breaker be switched on synchronously. The moving contact is separated from the static contact after thestandard miniature circuit breaker is disconnected with the live wire in the stroke that the driving handle makes the standard miniature circuit breaker and the zero line circuit breaker be opened andtripped or in the stroke that the driving handle of the zero line circuit breaker is driven to be tripped when the standard miniature circuit breaker is opened, tripped and triggered. The circuit breaker has a 2P circuit breaker standard width, an N pole is ensured not to generate electric arcs in opening and closing processes, and meanwhile, electric control can be realized.

Description

technical field [0001] The invention relates to the field of circuit breakers, in particular to an external circuit breaker for an electric energy meter and an N-pole non-arc breaking method thereof. Background technique [0002] In the lighting circuit, it is generally necessary to use a 2P circuit breaker to switch on or off the live wire and the neutral wire at the same time, and an arc extinguishing element is set at the dynamic and static contacts in each P circuit breaker. In recent years, in the domestic power grid system, "electric energy meter external circuit breaker" has been widely used. Different places have different requirements for "electric energy meter external circuit breaker". For example, the recent bidding technical requirements of Chongqing State Grid "electric energy meter external circuit breaker" overall 2P, external dimensions: 82mm x 36mm. The product complies with: Q / GDW 11421-2015 technical specifications for external circuit breakers for elec...

AI Technical Summary

Problems solved by technology

[0003] However, if the current 2P circuit breaker involves electric control of closing or opening, it is necessary to install a control mechanism on the side, resulting in the actual width of the 2P circuit breaker being too wide, which does not comply with Q / GDW 11421-2015 outside the electric energy meter. Circuit Breaker Technical Specifications

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