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Intelligent closing protection control device for distribution equipment

A power distribution equipment, protection and control technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problems of single function and imperfect protection function, and achieve the effect of convenient matching

Inactive Publication Date: 2016-11-23
QIXIA POWER SUPPLY CO STATE GRID SHANDONG ELECTRIC POWER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of imperfect protection function and single function in the above-mentioned prior art, and provide an intelligent switch-on protection control device for power distribution equipment with simple operation, perfect protection function and good versatility

Method used

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  • Intelligent closing protection control device for distribution equipment

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Comparison scheme
Effect test

Embodiment 1

[0015] For the intelligent closing protection control device of power distribution equipment in this embodiment, refer to the attached figure 1 , is used for power distribution equipment where the main control switch is an AC contactor.

[0016] The AC contactor control circuit on the power distribution equipment is equipped with start and stop buttons. The start button is normally open, and the stop button is normally closed. On the start button of the contactor, the normally closed contact of the trip execution circuit 11 is connected in series with the stop button circuit of the AC contactor.

[0017] The energy storage delay of the intelligent closing protection control device of the power distribution equipment is set to zero, and the closing delay is set to 10s.

[0018] The specific working process is as follows:

[0019] The working process of normal closing of the incoming call: when the incoming power supply is restored, that is, L1, L2, and L3 are energized, and c...

Embodiment 2

[0023] For the intelligent closing protection control device of power distribution equipment in this embodiment, refer to the attached figure 1 , It is used for the power distribution equipment where the main control switch is a universal circuit breaker.

[0024] The universal circuit breaker on the power distribution equipment adopts the normally open button mode, and has three operations of "energy storage", "closing" and "opening". During installation, connect the normally open contact of the energy storage execution circuit 6 of the invention to the "energy storage" button of the power distribution equipment, and connect the normally open contact of the closing execution circuit 8 to the "closing" button of the power distribution equipment On the button, connect the normally open contact of the trip execution circuit 11 to the "opening" button of the power distribution equipment.

[0025] The energy storage delay of the inventive device is set to 2s, and the closing dela...

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Abstract

The invention relates to an intelligent switch-on protection control device for power distribution equipment. It includes three-phase input protection switch, three-phase surge voltage protection circuit, micro-power three-phase rectification and voltage stabilization circuit, three-phase overvoltage / undervoltage / phase failure / bias phase / phase sequence protection circuit, energy storage delay circuit , Closing delay circuit, closing execution circuit, closing transfer operation circuit, operation protection circuit, tripping execution circuit. The present invention has the following advantages: 1. It can automatically detect whether there is overvoltage, undervoltage, phase loss, phase deviation and phase sequence change in the incoming power supply before closing; Safety protection is implemented in the case of overvoltage, phase loss, phase deviation and phase sequence error. 3. It can monitor whether the power supply is abnormal in real time online; 4. The delay setting of energy storage and closing of the invention can be adjusted independently; The closing circuit is separated.

Description

technical field [0001] The invention belongs to the field of power equipment, and in particular relates to an intelligent closing protection control device for power distribution equipment. Background technique [0002] With the continuous improvement of the national economy and people's living standards, the safety and reliability of power supply is becoming more and more important. At present, the main control switches commonly used in low-voltage power distribution equipment in China are mostly AC contactors or universal circuit breakers. When the high-voltage line has a power outage and the power transmission is resumed, it is necessary to manually go to the power distribution room for power transmission operation, which is a waste of manpower. and power supply time; and there is no effective protection for whether the incoming power supply is qualified after power restoration. For example, abnormal conditions such as phase loss, phase deviation, overvoltage, undervol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/22
CPCH02H7/22
Inventor 梁兆林周世兴刘成光徐文菊刘炳舟胡宝利邢凯林淑梅赵珊陈志芳孙红娟王香梅孙伟于勇宝牟一丹王翔宇
Owner QIXIA POWER SUPPLY CO STATE GRID SHANDONG ELECTRIC POWER CO
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