Circuit breaker with double-layer cascade structure

Abstract

The invention discloses a circuit breaker with a double-layer cascade structure. The circuit breaker with the double-layer cascade structure comprises an L-shaped stationary contact (7) and a base (10), wherein the stationary contact (7) comprises a contact part (714) and a cascade part (712), and is fixedly mounted on the base (10); the contact part (714) is positioned on an upper layer of the base (10); the cascade part (712) is positioned on a lower layer of the base (10), so that the double-layer cascade structure is realized. By virtue of the double-layer cascade structure, the contact resistance can be reduced, a cascade point which is most beneficial to a conductive loop is selected, the cascade function of the design can be ensured under the condition of short circuit, the insulation level can be improved in a cascade mode, and the appearance size of the circuit breaker is smaller.

Description

technical field [0001] The invention relates to the field of circuit breakers, in particular to a low-voltage direct current circuit breaker adopting a double-layer pole connection structure. Background technique [0002] Since entering the new century, the solar photovoltaic industry has become one of the most concerned emerging industries in the world today. Photovoltaic power generation does not require raw materials and has no gas emissions. It is a "green" industry with pollution-free, safe, long-life, simple maintenance, and resources With characteristics of inexhaustibility and wide distribution of resources, it is considered the most important new energy in the 21st century, and can be widely used in aerospace, communication, energy, agriculture, public facilities, transportation and residential buildings. [0003] With the rapid development of the new energy industry, DC technology has become more and more widely used, especially the working voltage of solar power g...

AI Technical Summary

Problems solved by technology

Although this kind of prefabricated wiring stabilizes the long-delay characteristics, the problem is that the internal pole connection used by the preset wiring, the pole connection part and the contact part are in the same space level, and once a fault current occurs, the pole connection may be destroyed. function, eventually leading to an abnormal conduction loop

It can be seen from the preset wiring schematic diagram of this patent that the conductive loop of the pole connection is relatively long. Taking the structural schematic diagram of Embodiment 1 as an example, the left side is used as a single pole of the circuit breaker, and the other three poles are connected in series to form a pole. , the series pole starts from the first static contact, the moving contact to the second moving contact, the static contact to the third static contact, and the moving contact from the upper end on the right side to the lower end on the right side through the tripping unit. The entire pole connection circuit path is long, and there are many pole connection points, resulting in a large internal resistance of the series poles, and the power consumption of the circuit breaker will also increase

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