A new type of power distribution safety power device

Abstract

The invention discloses a new type of power distribution safety electrical device, which comprises a first relay, a relay driver, a leakage current transformer, a linear transformer and a controller, wherein the contacts of the first relay, the leakage current transformer and the linear transformer are located at The PE grounding wire of the distribution transformer, the leakage current transformer, the linear transformer, and the relay driver are respectively connected to the controller. The leakage current transformer collects the current flowing through the PE grounding wire of the distribution transformer to obtain a current detection signal, and the linear transformer collects The voltage of the power frequency signal output by the distribution transformer is obtained as a voltage detection signal, and the controller generates a corresponding control signal according to the current detection signal or the voltage detection signal, and controls the relay driver to drive the contacts of the first relay to open or close. The invention suppresses the size of the leakage current by connecting the impedance in series in the loop, and drives the relay in the manner of current start and voltage return to realize disconnection and reset of the relay contact.

Description

A new type of power distribution safety device technical field [0001] The present invention relates to the field of power distribution devices, in particular to a new type of power distribution safety device. Background technique Over the years, although people attach great importance to safe electricity use, especially to prevent electric shock leakage accidents, a lot of work has been done. However, accidents such as electric shock casualties, leakage fires, leakage losses and other accidents still occur from time to time, bringing huge losses to people's lives and property. loss. [0003] The existing protection equipment against electric leakage is mainly an electric leakage protection switch, which is installed in factories, enterprises, and household AC mains. The basic technical principle of the input terminal is: real-time detection of the leakage current, when the leakage current is greater than the leakage current value, it will directly open close. [0004...

AI Technical Summary

Problems solved by technology

[0004] The existing technology has the following disadvantages: 1) It is impossible to suppress the magnitude of the leakage current without disconnecting the circuit; 2) It does not have an automatic reset function, and it needs to be manually reset after the electric leakage event is resolved

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