Online testing method of electrical arc light protection unit

A protection unit and online testing technology, which is applied in the direction of electrical components, emergency protection circuit devices, circuits, etc., can solve the problem that the accuracy and sensitivity of the arc sensor are easily polluted by the environment, cannot accurately detect the action parameters of the protection control unit, and the action of the protection device is accurate and rapid changes, to achieve accurate fault conditions and test results, easy to operate, and prevent environmental pollution
CN101034801AInactive Publication Date: 2007-09-12SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI MUNICIPAL ELECTRIC POWER CO
Publication Date
2007-09-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an arc light protection unit on-line test method, (1) installs the arc light sensor in the switch cabinet, and around the arc sensor fixed the simulation light source of which light intensity is adjustable; (2) under the electric system normal operation condition, through the change-over switch temporarily relieves the arc light protection unit and the electric system electrical connection, and connect with the test unit; (3) the test unit contrl the simulation fault current and simulation light intensity which brought to arc protection unit, the movement performance of test arc protection unit under the certain intensity light and current effect; (4) the test unit automatic logging the arc protection unit test result under the certain intensity light and current effect, judge the arc protection unit operating whether or not normal. The invention can on-line test and log the precise movement parameter of the arc protection unit under the different current and light intensity effect, and supplies a precise test means for guaranting the arc protection unit unitreliable movement.
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Description

technical field

[0001] The invention relates to a method for testing a switchgear protection unit in a power system, in particular to a method capable of online testing of an arc light protection unit under normal operating conditions of the power system. Background technique

[0002] When a short-circuit fault occurs in the switchgear, the generated arc quickly releases energy, causing the pressure and temperature in the switchgear to increase rapidly, and the energy generated by the arc is in the form of I 2 The t index law rises rapidly, so once the arc is ignited, the surrounding air will be ionized immediately, resulting in strong explosive pressure and high temperature. If it is not cut off in time, it will cause a major accident. At present, switchgear in medium and low voltage systems usually adopts the following three protection methods: (1) Transformer backup overcurrent protection, whose protection action time is 1.2s ~ 1.4s; Over-current protection, the protecti...

Claims

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