Circuit breaker switching off/on coil with self-protection function

A circuit breaker and self-protection technology, which is applied in the field of opening coils of power circuit breakers, can solve problems such as affecting power supply, long power failure time, burning opening (closing) coils, etc. simple effect

Inactive Publication Date: 2012-08-01
YUNCHENG POWER SUPPLY COMPANY OF STATE GRID SHANXI ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, once the power circuit breaker jams, it will inevitably burn the opening (closing) switch coil and the operation panel, seriously affecting the power supply
If spare parts are lacking, the power outage will be longer

Method used

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  • Circuit breaker switching off/on coil with self-protection function
  • Circuit breaker switching off/on coil with self-protection function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] attached figure 1 The circuit breaker opening (closing) coil with self-protection function of the present invention is composed of a traditional circuit breaker opening (closing) coil (1) and a PPTC element, and is characterized in that the PPTC element is the same as the traditional circuit breaker opening (closing) coil (1). closing) brake coils (1) are connected in series to form a circuit breaker opening (closing) brake coil (2) with self-protection function. Taking the opening (closing) gate current of 2 amps as an example, select the appropriate PPTC component. According to the field test, the opening (closing) coil of the circuit breaker will not burn out within 7 seconds after the rated current is applied, and the normal operating time of the circuit breaker is 100 Within milliseconds, check the characteristic curve of the PPTC component and select a 200-500 mA PPTC component. Test the PPTC element by passing a 2A current to ensure its operating characteristics...

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PUM

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Abstract

The invention relates to a circuit breaker switching off / on coil with a self-protection function. The circuit breaker switching off / on coil consists of a traditional circuit breaker switching off / on coil and a macromolecule polymer positive temperature coefficient (PPTC) resistance element which are connected in series; when the power supply of the switching off / on coil cannot be disconnected due to a fault of a control circuit of the circuit breaker, a self-protection element (PPTC) on the switching off / on coil cuts off the current, so as to avoid burning-down of the circuit breaker switching off / on coil; and after the external power supply disappears, the self-protection element (PPTC) on the switching off / on coil restores to an original state automatically, and manual handling is not needed.

Description

technical field [0001] The invention relates to an opening (closing) coil of a power circuit breaker. Background technique [0002] The opening (closing) action of the power circuit breaker is realized because the opening (closing) coil is energized for a short time and attracts the electromagnet. After the opening (closing) action starts, the circuit is in a self-holding state. The auxiliary switch linked by the mechanism is cut off. If there are problems such as mechanism jamming and auxiliary switch not switching normally during opening (closing), the auxiliary contact will not open, the opening (closing) circuit will be self-maintained, and the opening (closing) coil will be charged for a long time. All opening (closing) switch coils are designed according to short-term charging, and they will be burnt when they are charged for a long time. During the burning process, inter-turn short circuit will generally occur, the current will increase, and then the operation panel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/10H02H3/00H02H3/06
Inventor 郝永晶
Owner YUNCHENG POWER SUPPLY COMPANY OF STATE GRID SHANXI ELECTRIC POWER
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