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.

Inactive Publication Date: 2005-01-19
SHANGHAI KETER POLYMER MATERIAL
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

[0004] The non-contact intelligent switch device provided in the Chinese invention patent specification with the authorized announcement number CN 1074187C applied for on July 2, 1998 cancels the mechanical device of all electrical parts of the switch, but for the same reason, when breaking a large short circuit Not ideal for current
Especially in the field of high voltage and high current, there are great limitations

Method used

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  • Arc-less switching circuit and method for switch apparatus
  • Arc-less switching circuit and method for switch apparatus
  • Arc-less switching circuit and method for switch apparatus

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] In the embodiment of the arcless switching circuit of the single-pole switchgear of the 380V power distribution system, such as figure 1 As shown in , the arcless switching circuit of the single-pole switchgear includes the main contact 1 of the switchgear, the commutation circuit 2, and the commutation circuit 2 includes a switch 21, two thyristors 22, 23 connected in antiparallel and positive temperature coefficient PTC thermistor group 25, wherein, also comprise sampling resistance 24, two voltage clampers 26, 27 in the commutation circuit 2; After the resistance 24 and the PTC thermistor group 25 with positive temperature coefficient are connected in series, they are connected in parallel to the two ends of the main contact 1 of the switchgear, and a voltage clamper 27 in the commutation circuit 2 is also connected in parallel to the main con...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H9/30H01H9/54
Inventor 高翔朱仲彦史宇正方斌
Owner SHANGHAI KETER POLYMER MATERIAL
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