Arc-less switching circuit and method for switch apparatus

A technology for switching equipment and switching circuits, which is applied in the direction of circuits, electric switches, and electrical components. It can solve the problems of unsatisfactory breaking of large short-circuit currents, and achieve the effects of saving complex structures, reducing contact burnout, and prolonging the overhaul period.
CN1567495AInactive Publication Date: 2005-01-19SHANGHAI KETER POLYMER MATERIAL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI KETER POLYMER MATERIAL
Publication Date
2005-01-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention is a no-arc switching circuit of switching device and its method, including a primary contactor and a current commutating circuit, and its characteristic: in the current commutating circuit, a switch is connected in serial with a pair of reverse-parallel thyristors, sampling resistance, a PTC thermal sensitive resistance group and then connected in parallel with the primary contactor, and a voltage clamper is also connected in parallel with the primary contactor; the other voltage clamper is connected in parallel with the serial reverse-parallel thyristor pair and sampling resistance ; because of the protection of the voltage clampers, especially as switching overload or short-circuit current, assuring the thyristors normally working, thus effectively eliminating or inhibiting electric arc, protecting the contactor against melting or burning and assuring the switching reliability of the switching device.
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Description

technical field

[0001] The present invention relates to electric power transmission and distribution, generator and electric control technology, especially related to current switchgear such as load switch, circuit breaker, contactor and its supplementary electrical technology. Background technique

[0002] In order to eliminate the arc, the current switchgear, especially in the field of high voltage and high current, widely adopts vacuum or SF6 arc extinguishing device. This kind of switch has the disadvantages of complex structure and difficult maintenance; on the other hand, the breaking of switchgear such as circuit breakers The ability is restricted by the arc extinguishing ability, which often makes the switch fail to trip and cause serious economic losses.

[0003] The electronic combination switch provided in the Chinese utility model patent specification with the authorized announcement number CN 2468145Y applied on September 22, 2000, w...

Claims

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