A New Type of Low Power Leakage Protector

Abstract

The invention relates to a novel low-power leakage protector, which includes an AC power supply, a thyristor, a signal processing module, a current transformer, a thyristor current drive module, and a power-taking circuit module. The novel low-power leakage protector It also includes a voltage measurement enabling module, and the thyristor current drive module is also controlled by the enabling control of the voltage measurement enabling module, and the voltage measurement enabling module only monitors the output voltage of the power-taking circuit module When a certain condition is met, the current to drive the thyristor is allowed to be output, that is, only when the voltage measurement enabling module and the signal processing module both output valid enabling signals, the thyristor is allowed to drive the current The module output drives the conduction current of the thyristor. Compared with the prior art, the invention has the advantages of low driving power consumption of the thyristor, simplified structure of the power-taking circuit, low power consumption, small temperature rise, energy saving and environmental protection, and low cost.

Description

technical field [0001] The invention relates to the technical field of electrical protector switches, in particular to a novel low-power leakage protector. Background technique [0002] The principle of the scheme mainly adopted by the existing leakage protector is: when leakage occurs, the sum of the currents of all the live and neutral lines of the power supply is non-zero, and the difference can be detected by the current transformer, and then amplified, processed and confirmed by the relevant circuit. , drive the thyristor to conduct, the conducting current flows through the trip coil of the release, and the release acts to cut off the mains power supply switch. The existing mainstream leakage protector scheme is based on an application-specific integrated circuit chip to process the signal output by the current transformer and drive the thyristor to conduct. [0003] The advantage of this scheme is that the signal processing is accurate, and it can reliably drive the t...

AI Technical Summary

Problems solved by technology

But the disadvantage is that the power consumption is relatively large, generally around 0.5 watts, which causes the internal temperature of the leakage protector to rise, and it is especially easy to overheat and damage when working in a high temperature environment

At the same time, the circuit structure of directly taking power from the mains is also more complicated and the cost is higher

If the leakage protector is always working in the distribution box, the cumulative power consumption of 0.5 watts of power consumption in a year is about four degrees, and there are at least hundreds of millions of leakage protectors in the whole country, which is not conducive to energy conservation and environmental protection.

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