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Protection system for circuit breaker switching-on and switching-off coil, and circuit breaker

A technology of opening and closing coil and protection system, applied in the direction of operation/release mechanism of protection switch, circuit, electrical components, etc., can solve the problems of burning of opening and closing coil, hidden danger of power grid equipment and system, etc.

Active Publication Date: 2021-07-16
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the actual operation of the power grid, the phenomenon of burning of the opening and closing coils occurs frequently, which poses a great hidden danger to the safety of power grid equipment and systems

Method used

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  • Protection system for circuit breaker switching-on and switching-off coil, and circuit breaker
  • Protection system for circuit breaker switching-on and switching-off coil, and circuit breaker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] figure 1 A schematic structural diagram of a protection system for a circuit breaker opening and closing coil provided in Embodiment 1 of the present invention, as shown in figure 1 As shown, the protection system includes: an intelligent protection module 101 and an auxiliary switch module 102 . The auxiliary switch module 102 is connected in series with the opening and closing coil 103 of the circuit breaker, and the intelligent protection module 101 is connected in parallel with the auxiliary switching module 102 and the opening and closing coil 103 of the circuit breaker. The intelligent protection module 101 includes a coil parameter acquisition unit 1011, a control unit 1012 and a circuit breaker outlet unit 1013;

[0030] The coil parameter acquisition unit 1011 is used to acquire the parameter information of the opening and closing coil 103 of the circuit breaker;

[0031] The control unit 1012 is electrically connected to the coil parameter acquisition unit 1...

Embodiment 2

[0053] figure 2 A schematic structural diagram of a circuit breaker provided in Embodiment 2 of the present invention, combined with figure 1 and figure 2 As shown, the circuit breaker 200 includes a circuit breaker opening and closing coil protection system 201 of any one of the above embodiments, and also includes a circuit breaker opening and closing coil 103 and an external power supply 104; the circuit breaker opening and closing coil 103 and an auxiliary switch module 102 is arranged in series between the positive and negative connection terminals of the external power supply 104 , and the intelligent protection module 101 is arranged between the positive and negative connection terminals of the external power supply 104 .

[0054] The circuit breaker provided by the embodiment of the present invention can implement the protection system for the opening and closing coil of the circuit breaker provided by the above-mentioned embodiments of the present invention, and ha...

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Abstract

An embodiment of the invention discloses a protection system for a circuit breaker switching-on and switching-off coil and a circuit breaker. The protection system comprises an intelligent protection module and an auxiliary switch module. The auxiliary switch module is connected in series with the circuit breaker switching-on and switching-off coil, and the intelligent protection module is connected in parallel with the auxiliary switch module and the circuit breaker switching-on and switching-off coil. The intelligent protection module comprises a coil parameter acquisition unit, a control unit and a circuit breaker outlet unit. The coil parameter acquisition unit is used for acquiring parameter information of the breaker switching-on and switching-off coil. The control unit is electrically connected with the coil parameter acquisition unit and is used for receiving the parameter information and analyzing and judging the parameter information to form judgment information. The circuit breaker outlet unit is electrically connected with the control unit and is used for receiving the judgment information and controlling the conduction state of the auxiliary switch module according to the judgment information. By arranging the intelligent protection module and the auxiliary switch module, the real-time state of the circuit breaker switching-on and switching-off coil is judged, the damage frequency of the circuit breaker switching-on and switching-off coil is reduced, and potential safety hazards are reduced.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of circuit breakers, in particular to a protection system for opening and closing coils of a circuit breaker and a circuit breaker. Background technique [0002] In the power system, the circuit breaker can ensure the normal on-off state of the circuit in the power system, and can also disconnect the fault current when the system fails, preventing the expansion of the accident and ensuring the safe and stable operation of the power grid. As one of the important power equipment in the power system, it has been widely used in the fields of industry, agriculture, transportation, national defense, culture, education and health, finance, commerce, tourism services and people's life. [0003] Due to mechanical stagnation inside the circuit breaker, circuit defects, large stroke, adhesion of auxiliary contacts, etc., when the opening and closing coils have current flowing for a long time d...

Claims

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Application Information

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IPC IPC(8): H01H71/10H01H9/54
CPCH01H71/10H01H9/54
Inventor 刘耀云田新华吴春玉邱育义
Owner GUANGDONG POWER GRID CO LTD
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