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Vacuum circuit breaker energy storage motor protection circuit

A technology of vacuum circuit breaker and energy storage motor, which is applied to emergency protection circuit devices, electrical components, etc., can solve the problem of inability to automatically cut off the power supply, and achieve the effect of reducing the damage accident of energy storage motor, reliable operation and improving reliability.

Inactive Publication Date: 2013-11-06
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the micro switch 5 is always in the closed state when it fails, the energy storage motor 1 will be in the live running state for a long time and cannot automatically cut off the power supply

Method used

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  • Vacuum circuit breaker energy storage motor protection circuit
  • Vacuum circuit breaker energy storage motor protection circuit

Examples

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Embodiment Construction

[0016] Such as figure 2 , a vacuum circuit breaker energy storage motor protection circuit, including an energy storage motor 1, a DC switch 1DK is respectively connected between the energy storage motor 1 and the positive and negative poles of a 220V DC voltage, and the energy storage motor 1 is sequentially connected in parallel with a second The intermediate relay 2, the time relay 3, the first intermediate relay 4, the energy storage motor 1 is connected in series with the normally open contact 6 of the first intermediate relay, the normally closed contact 8 of the second intermediate relay, and the second intermediate relay is connected in series with the extension of the time relay. Time-closing contact 9, the delay closing contact 9 of the time relay is connected in parallel with the normally open contact 7 of the second intermediate relay, the time relay 3 is connected in series with the normally open contact 10 of the first intermediate relay, the first intermediate r...

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Abstract

The invention discloses a vacuum circuit breaker energy storage motor protection circuit which comprises an energy storage motor. A direct-current switch is connected between the energy storage motor and a positive electrode of direct-current voltage, another direct-current switch is connected between the energy storage motor and a negative electrode of the direct-current voltage, the energy storage motor is sequentially parallelly connected with a second intermediate relay, a time relay and a first intermediate relay and serially connected with a first normally open contact of the first intermediate relay and a normally closed contact of the second intermediate relay, the second intermediate relay is serially connected with a time delay closing contact of the time relay, the time delay closing contact of the time relay is parallelly connected with a normally open contact of the second intermediate relay, the time relay is serially connected with a second normally open contact of the first intermediate relay, and the first intermediate relay is serially connected with a microswitch. Circuit reliability of the energy storage motor is improved, the accident of damage to the energy storage motor due to the failure can be reduced, and a medium-voltage distribution system is more reliable in operation.

Description

technical field [0001] The invention belongs to the field of medium-voltage power distribution systems, and in particular relates to a vacuum circuit breaker energy storage motor protection circuit, which provides guarantee for the safe and reliable operation of the vacuum circuit breaker in the power distribution system. Background technique [0002] In the field of medium voltage power distribution, the operation and stop of the energy storage motor of the vacuum circuit breaker mainly depends on the micro switch control of the energy storage mechanism. Under normal circumstances, when there is no energy storage, the contact of the micro switch is closed, and the energy storage motor runs; otherwise, the contact of the micro switch is disconnected, and the energy storage motor stops running. However, in actual operation, sometimes due to the failure of the micro switch, the contacts of the micro switch cannot disconnect the energy storage motor circuit, causing the energy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/08
Inventor 汪正初陈尔恋刘琼秋
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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