Intelligent earth leakage protection switch

Abstract

The invention relates to the field of power equipment, in particular to an intelligent earth leakage protection switch. The switch comprises an earth leakage protection switch body, an instruction receiving module, a test triggering module and a judgment indication module. The instruction receiving module receives a test instruction periodically sent by the superior controller, and controls the test trigger module to trigger an electric leakage test function after receiving the test instruction; and when the judgment indication module does not detect the leakage protection action, the alarm prompt information is sent. In the invention, the control equipment at the upper level can send out or generate a signal which can be identified by the electric leakage protection switch and can be uniquely identified, and when the electric leakage protection switch identifies the signal, the electric leakage protection test function is executed, so the normal function of the electric leakage protection switch can be ensured. According to the invention, the leakage protection function of the leakage protection switch can be periodically and automatically tested.

Description

technical field [0001] The invention relates to the field of electric equipment, in particular to an intelligent leakage protection switch. Background technique [0002] The leakage protection switch can automatically disconnect the circuit breaker or air switch when a leakage is detected, thereby achieving the effect of protecting personal safety. The principle is that after an electric shock accident, the current of the live wire will flow into the ground through the human body, so the zero-sequence current transformer inside the leakage protection switch will detect the difference between the current on the neutral wire and the live wire. When the difference is large, it will be zero. When the sequence current reaches the set threshold, the protection switch is activated to disconnect the circuit breaker. However, in order to ensure the normal function of the leakage protection switch, it is necessary to test the leakage protection switch. At present, the test interval o...

AI Technical Summary

Problems solved by technology

However, in order to ensure the normal function of the leakage protection switch, it is necessary to test the leakage protection switch. At present, the test interval on the leakage protection switch is mostly set to one month, but users often forget to check the leakage protection function of the leakage protection switch every month

Therefore, when the function is abnormal, the electric shock accident cannot play a protective role, and thus cannot protect personal safety.

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