Low-pressure single-phase alternating current leakage protector

Abstract

The invention discloses a low-pressure single-phase alternating current leakage protector. The leakage protector comprises a power failure trip protecting mechanism, a resonant protection circuit capable of generating resonance immediately and generating instantaneous high impedance when an earth fault happens, a data acquisition processing circuit, and a main controller for controlling the power failure trip protecting mechanism according to a signal detected by the data acquisition processing circuit, which are connected in series in a power supply circuit; the resonant protection circuit is a double-resonance protection circuit consisting of two LC resonant circuits; the two LC resonant circuits comprise a first LC resonant circuit consisting of L1 and C1, and a second LC resonant circuit consisting of L2 and C2, and the L1 and the L2 are two mutual inductors; and the data acquisition processing circuit is connected in parallel at two ends of the capacitor C1 or the capacitor C2. The low-pressure single-phase alternating current leakage protector has reasonable circuit design, high intelligent degree and good using effect, and can effectively solve the practical problems that the prior leakage protector has unreliable motions, is likely to cause personal casualty, influences load normal operations and the like.

Description

technical field [0001] The invention relates to a leakage protector, in particular to a low-voltage single-phase AC leakage protector. Background technique [0002] Leakage protector is an electrical product used to protect against electric leakage and electric shock. It plays an important role in preventing electric leakage fire and personal electric shock. Therefore, the country has mandatory requirements for electricity safety, and leakage protectors must be installed in many occasions. The existing leakage protectors are divided into electronic type and electromagnetic type according to the action principle. The working principle of the electromagnetic type leakage protector is: when leakage or electric shock occurs, the signal detected by the zero-sequence current transformer is judged by the discrimination mechanism. Finally, the tripper of the actuator is correspondingly driven to act, so that the main switch acts directly to cut off the power supply to protect the s...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a low-voltage single-phase AC leakage protector for the deficiencies in the above-mentioned prior art. There are practical problems such as unreliable action, possible casualties, and affecting the normal operation of the load

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