Automatic closing apparatus of low-voltage universal circuit breaker

A universal circuit breaker and automatic closing technology, applied in the direction of protection switch operation/release mechanism, etc., can solve the problems of waste of manpower and material resources, and prolong the power transmission time, so as to improve the power supply capacity, improve the service level, and shorten the restoration of power transmission. effect of time

Inactive Publication Date: 2015-11-11
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] For example, there are 47 public transformers and 120 community transformers on the line operated by a transportation inspection team. There are 136 transformers with low-voltage universal circuit breakers with undervoltage protection. All universal circuit breakers require operating personnel to manually switch on and transmit power to the site, prolonging the power transmission time and causing waste of manpower and material resources

Method used

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  • Automatic closing apparatus of low-voltage universal circuit breaker

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Embodiment Construction

[0010] like figure 1 As shown, the present invention provides a low-voltage universal circuit breaker automatic closing device, including a control unit, the control unit is connected to the power supply line of the low-voltage universal circuit breaker through a pair of normally closed auxiliary contacts DF of the low-voltage universal circuit breaker. The control unit includes the coil of the time relay KT, the first normally open contact KT-1 of the time relay KT is connected in series with the coil of the first AC contactor KM1 and then connected in parallel with the coil of the aforementioned time relay KT, and the first normally open contact of the time relay KT is connected in parallel. The two normally open contacts KT-2 are connected in series with the coil of the second AC contactor KM2 and are also connected in parallel with the coil of the aforementioned time relay KT; wherein a pair of normally open contacts of the first AC contactor KM1 are connected in parallel w...

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Abstract

The invention relates to an automatic closing apparatus of a low-voltage universal circuit breaker. The automatic closing apparatus comprises a control unit that is connected with a power inlet wire of a low-voltage universal circuit breaker by a pair of normally-closed auxiliary contacts (DF) of the low-voltage universal circuit breaker. The control unit contains a coil of a time relay (KT); a first normally-open contact (KT-1) of the time relay (KT) is connected in series with a coil of a first alternating-current contactor (KM1) and then is connected in parallel with the coil of the time relay (KT); and a second normally-open contact (KT-2) of the time relay (KT) and a coil of a second alternating-current contactor (KM2) are connected in series and then are connected in parallel with coil of the time relay (KT). The application of the apparatus demonstrates that the power sending recovery time for users by a cell transformer station is effectively shortened with the apparatus, the power sale quantity is increased, the power supply capability of the distribution grid is improved, and the service level is enhanced.

Description

technical field [0001] The invention relates to an automatic closing device for a low-voltage universal circuit breaker. Background technique [0002] Low-voltage universal circuit breaker is a common power equipment. Take DW15 low-voltage universal circuit breaker as an example. DW15 low-voltage universal circuit breaker is mainly used to distribute electric energy and protect line equipment. Protective function. [0003] For example, there are 47 public transformers and 120 residential transformers on the line of a certain transportation inspection class, and a total of 136 transformers with low-voltage universal circuit breakers with undervoltage protection. Universal circuit breakers all require operators to manually switch on and transmit power on site, which prolongs the time of power transmission and causes waste of manpower and material resources. SUMMARY OF THE INVENTION [0004] The purpose of the present invention is to provide an automatic closing device for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/66
CPCH01H71/66
Inventor 王波周志中马伟马勇曹峻峰倪坤顾斌郭锐马玉忠杨自东张智
Owner STATE GRID CORP OF CHINA
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