Electronic residual current operated circuit breaker

Abstract

An electronic residual current operated circuit breaker comprises a shell, a plurality of protection electrodes and a neutral electrode, a circuit board used for collecting and processing current signals of a main circuit of the circuit breaker and driving the circuit breaker to operate according to the current signals is arranged in the shell, and the circuit board comprises a signal processing circuit, a tripping circuit and a power circuit. After the signal processing circuit judges the residual current, the tripping circuit is driven to act, and the tripping circuit drives the operating mechanism of the circuit breaker to act to make the circuit breaker trip and break. The circuit board comprises a first circuit board and a second circuit board which are electrically connected, the first circuit board is arranged in the protection electrodes and the neutral electrode in a penetrating mode in the width direction of the outer shell, the second circuit board is arranged in the neutralelectrode, and the signal processing circuit and the tripping circuit are arranged on the second circuit board. The first circuit board and the second circuit board are electrically connected and separately arranged, so that the space occupied by wiring of the circuit boards can be reduced, the length of a wire is shortened, and the working performance of the circuit boards is improved.

Description

technical field [0001] The invention relates to a low-voltage power distribution system, in particular to an electronic residual current operated circuit breaker. Background technique [0002] In the low-voltage power distribution terminal system, the residual current operated protective circuit breaker with overcurrent protection is used for indirect contact protection for people, for overcurrent protection for buildings and similar purpose line equipment, and for Protection against fire hazards caused by ground fault currents that operate and persist. [0003] However, at present, the current level of the frame frame reaches 63A, the number of poles is 3P+N, and the residual current operated protection circuit breaker whose operating function is related to the power supply voltage usually adopts an assembled structure, so that the overall width of the circuit breaker can reach 6.5 modules, of which 1 The width of each module is 18mm, such a structure makes the volume of t...

AI Technical Summary

Problems solved by technology

[0003] However, at present, the current level of the frame frame reaches 63A, the number of poles is 3P+N, and the residual current operated protection circuit breaker whose operating function is related to the power supply voltage usually adopts an assembled structure, so that the overall width of the circuit breaker can reach 6.5 modules, of which 1 The width of each module is 18mm, such a structure makes the volume of the circuit breaker too large and takes up too much space in the terminal distribution box

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