CN2240790Y

CN2240790Y - Leakage protective plug

Info

Publication number: CN2240790Y
Application number: CN 95222952
Authority: CN
Inventors: 涂植辉; 黄荣才; 窦志灵
Original assignee: Repair Shop Yunan National Defence Science And Tech Industrial Office
Current assignee: Repair Shop Yunan National Defence Science And Tech Industrial Office
Priority date: 1995-09-28
Filing date: 1995-09-28
Publication date: 1996-11-20
Anticipated expiration: 2005-09-28

Abstract

The utility model relates to a power supply plug used for electric appliance devices, which is characterized in that a plug box is provided with a circuit board, an iron-core pressing spring, an iron-core shaft, a direct-current coil, a resetting button, a resetting push rod, a tripping draw rod, a movable contact, a fixed contact, a tripping spring, a contacting reed, a zero-sequence mutual inductor, etc., wherein, a dc coil is arranged between the circuit board and the iron-core shaft; the resetting push rod is clamped on the iron-core shaft, and is attached to the tripping draw rod. The product of the utility model has safe performance, and when the electric appliance connected with the utility model has electric leakage with electric shock hazard, the utility model can automatically cut off the power supply in scores of ms, preventing people from being harmed by electric shock.

Description

Leakage protecting plug

The utility model relates to a kind of attaching plug that is used for electrical installation, specifically is that a kind of electrical equipment when connection leaks electricity, when Danger Electric shock risk is arranged, and the leakage protecting plug that can cut off the electricity supply automatically.

Appearance along with various electrical installation; attaching plug is used also very extensive in daily life; but existing attaching plug only plays the effect with various electrical installations and power connection; do not have defencive function; when electrical leakage, Danger Electric shock risk easily takes place, use dangerous; and tend to run into an electrical leakage, the worry that the whole family has a power failure.

The purpose of this utility model provides a kind of when connecting circuit is caused danger, the leakage protecting plug that can cut off the electricity supply automatically in moment.

Below in conjunction with accompanying drawing and embodiment shown in the drawings, content of the present utility model is explained in detail, but content of the present utility model is not limited to shown in the accompanying drawing.

Fig. 1 is a mechanical structure schematic diagram of the present utility model;

Fig. 2 is the circuit diagram of embodiment 1;

Fig. 3 is the circuit diagram of embodiment 2.

Power line (1), loam cake (2), test spring (3), testing button (4), wiring board and electronic component (5), iron core stage clip (6), iron mandrel (7), dc coil (8), reset button (9), the push rod that resets (10), dropout pull bar (11), moving contact (12), fixed contact (13), dropout spring (14), copper plug (15), contact spring (16), zero-sequence transformer and coil (17), lower cover (18), lug plate (19).

The utlity model has power line (1), loam cake (2), lower cover (18), copper plug (15), loam cake and lower cover cooperatively interact and are assembled into the plug box, copper plug (15) is fixed on the front end of lower cover (18), in the plug box, also has test spring (3), testing button (4), wiring board and electronic component (5), iron core stage clip (6), iron mandrel (7), dc coil (8), reset button (9), push rod (10) resets, dropout pull bar (11), moving contact (12), fixed contact (13), dropout spring (14), contact spring (16), zero-sequence transformer and coil (17), lug plate (19), zero-sequence transformer (17) is outer around two groups of coils, wiring board is equipped with the rectified current sub-element on (5), is provided with dc coil (8) between wiring board (5) and iron mandrel (7), and reset lever (10) is connected in the iron mandrel (7) and dropout pull bar (11) articulates, moving contact (12) is riveted on the contact spring (16), and fixed contact (13) is riveted on the copper plug (15).

The circuit theory of the present utility model and the course of work are as follows:

Zero-sequence transformer ZCT on the utility model wiring board; outward around two groups of coils; its potential difference is zero under the normal condition; when electric leakage takes place in the household electrical appliance that are attached thereto; the mutual inductor coil appearance potential is poor; make rectifier cell rectification and amplification on the secondary generation induced voltage via line plate (5); signal is transferred to dc coil KL1 makes it to produce electromagnetic attraction; the interior pulling iron mandrel (7) of inhaling; the reset lever (10) that is stuck in the iron mandrel is broken away from dropout pull bar (11); and then moving contact (12) that is riveted on the contact spring (16) and the fixed contact (13) that is riveted on the copper plug (15) are broken away from; deenergization plays the effect of protection personal safety and electric equipment.After apparatus failure is got rid of, press reset button S2, can recover normal use.Whether testing button S1 and test spring (3) can be used for artificial electric leakage normal with the creepage protection function of testing this plug.

Circuit of the present utility model can adopt dual mode, and Fig. 2 is an economizing type.

Compared with prior art, the utility model performance safety is reliable, when connecting with the utility model The electrical equipment that connects leaks electricity, and when Danger Electric shock risk is arranged, can automatically cut off within a few tens of milliseconds Power supply, the harm that makes the people avoid getting an electric shock; It can prevent effectively that also the brave electric current of wave and thunder and lightning are to electricity The impact failure of device has been eliminated a worry that the electrical leakage whole family has a power failure. The utility model can Be widely used in the various household electrical appliance such as television set, refrigerator, computer, electric tool and instrument Instrument, it is skillfully constructed, and modern design has the good prospect of marketing.

Claims

1; a kind of leakage protecting plug; has power line (1), loam cake (2), lower cover (18); copper plug (15); loam cake and lower cover cooperatively interact and are assembled into the plug box, and copper plug (15) is fixed on the right side of lower cover (18), it is characterized in that also having in the plug box wiring board and electronic component (5); iron core stage clip (6); iron mandrel (7), dc coil (8), reset button (9); push rod (10) resets; dropout pull bar (11), moving contact (12), fixed contact (13); dropout spring (14); contact spring (16), zero-sequence transformer and coil (17), lug plate (19); zero-sequence transformer (17) is outer around two groups of coils; wiring board is equipped with the rectified current sub-element on (5), is provided with dc coil (8) between wiring board (5) and iron mandrel (7), and reset lever (10) is connected in the iron mandrel (7) and dropout pull bar (11) articulates.

2, leakage protecting plug according to claim 1 is characterized in that moving contact (12) is riveted on the contact spring (16), and fixed contact (13) is riveted on the copper plug (15).

3,, it is characterized in that loam cake (2) is provided with the testing button (4) and the test spring reed (3) of test plug creepage protection function according to claim 1,2 described leakage protecting plugs.