Uninterrupted power test residual current protective device

Abstract

The invention relates to an uninterrupted power test residual current protective device which comprises a detection device and a terminal strip fixed on the wall of a distribution box, wherein the detection device comprises a residual current operated protective device fixed in a test box, an intermediate relay and a monitoring lamp, wherein the detection device is connected with a tested residual current operated protective device and an alternating current contactor which are arranged in the distribution box, and a casing of the test box is connected with a grounding box through a connecting wire. The device has simple structure, and an alternating current contact coil can not lose power during the trial jump.

Description

technical field [0001] The invention relates to a residual current protection device for non-power-off testing. Background technique [0002] In order to ensure the correct and sensitive operation of the residual current operated protective device, the operating personnel must conduct regular and irregular trip checks on the residual current operated protective device in operation. The existing distribution box usually includes the measured residual current operating protector 3, the AC contactor 2 and the zero-sequence current transformer 1, and the measured residual current operating protector 3 is provided with the measured residual current operating protector power supply input line 11 and the output line 10 of the measured residual current action protector, the power input line 11 of the measured residual current action protector is connected to the 220V voltage line 13, the output line 10 of the measured residual current action protector is connected to the intermediat...

AI Technical Summary

Problems solved by technology

The traditional test method is to directly press the test button 3 of the residual current action protector to be tested, or use a grounding resistance to simulate grounding, and perform a test trip

During the trial jumping process, the AC contactor 2 coil will be de-energized and the line will be de-energized instantaneously, resulting in the following disadvantages:

[0003] 1. Frequent power outages of lines will have adverse effects on high-end electronic products such as LCD TVs and air conditioners, especially when instant communication devices such as computers and fax machines are working, sudden power outages may bring immeasurable losses to users; Enterprises, such as glassware manufacturing, textiles, etc., instantaneous power loss will damage the products and cause economic losses to the enterprise

[0004] 2. The user misunderstands that the line is continuously supplying power, and the staff enters the electric room to artificially cause the line to trip

[0005] 3. After the line loses power instantaneously, some loads have a delay protection function, and cannot be restored immediately after the call, resulting in loss of power supply load

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