Fire-proof and electric leakage-proof safety plug

Abstract

The invention relates to a compact and tiny multifunctional fire-proof and electric leakage-proof safety plug, which comprises an electromagnetic tripping device and a multifunctional protection auxiliary circuit which are arranged on a substrate. A movable iron core, all the tripping coils sleeved on the movable iron core and a framework are arranged on the substrate, an insulation board is fixedly arranged on the central position of a movable contact plate, and a permanent magnet is fixedly arranged on a position where the insulation board can be sucked with a static iron core on a plug shell. When a load end of the plug has the faults such as overload, over voltage, electricity leakage, short circuit and / or overheating in the plug and the like, the protection circuit controls the tripping device to automatically and rapidly trip to cut off a power supply. When the safety plug normally works, as long as a loop leakage current exceeds 5 to 10mA, the power supply can be cut off within25ms to obviously improve outage speed and sensitivity and have good function of protecting low-current domestic appliances and handheld electric tools. The safety plug is a small-sized fire-proof andelectric leakage-proof protection device having reliable fire proofing performance.

Description

technical field [0001] The invention relates to a high-sensitivity power plug capable of moving with electrical appliances and has the functions of leakage protection, overcurrent protection, overheat protection, overvoltage protection and short circuit protection, in particular to a fast fireproof and anti-leakage safety protection power plug. Background technique [0002] At present, the electrical leakage protection plug products sold on the market have a leakage current of 30mA, which exceeds the absolute safe current of the human body (the absolute safe current of the human body is 10mA), and has no good protection effect on the human body, nor does it have over-current and short-circuit protection functions. Current and short-circuit faults are the culprits of fires. When the protection plug line has overload, leakage, short-circuit and other faults, because the plug has no over-current and over-heat protection functions, the power cannot be cut off, and even after the ...

AI Technical Summary

Problems solved by technology

And the tripping device on the low-voltage electrical apparatus (such as circuit breaker, protector etc.) of prior art, because its structure is complicated, manufacturing cost is high, volume is big, tripping sensitivity is low, is not suitable for reasons such as frequent operation occasion, so cannot release device for plug

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