CN2135855Y

CN2135855Y - Snap separating type electric leakage protector

Info

Publication number: CN2135855Y
Application number: CN 92235104
Authority: CN
Inventors: 肖伟; 林治华
Original assignee: ZHONGNAN RADIO FACTORY
Current assignee: ZHONGNAN RADIO FACTORY
Priority date: 1992-10-22
Filing date: 1992-10-22
Publication date: 1993-06-09
Anticipated expiration: 2002-10-22

Abstract

The utility model relates to a tripping type electric leakage protector, which comprises a tripping mechanism, a printed circuit board, a detecting circuit which is mainly composed of a zero sequence mutual inductor, and an executive circuit. The tripping type electric leakage protector is characterized in that the tripping type electric leakage protector adopts a first-level mechanical trip to achieve leakage protection, the electronic circuit doesn't adopt an amplifier, and a self-generation circuit is not needed, which reduces the prophase failure. The utility model has the advantages of simple structure, small size, low cost, good motility and strong deformation performance.

Description

Snap separating type electric leakage protector

The utility model relates to a kind of dropout type earth leakage protective device, is a kind of electrical device that is applicable to, especially the hand-held electric appliance tool is made the device of electric leakage safeguard protection.

Existing earth leakage protective device kind is a lot of, is 87202077.0 multifunctional protecting switch as application number, and application number is that 86203365 earth leakage protective device and application number are residual current operated protective device of 87209581 etc.These earth leakage protective devices can reduce three classes by its working method.

The first kind is the relay switching mode; The earth leakage protective device of this mode, electronic circuit complexity not only, poor anti jamming capability, and also it is serious to lose efficacy early stage.

Second class is the solid state circuit mode; The earth leakage protective device of this form influences because of being subjected to the semiconductor device reverse leakage current, switches not thorough when hot environment (more than 55 ℃); Simultaneously, owing to the null offset of amplifier misoperation takes place easily; And whole apparatus cost is also high, should not extensively promote the use of.

The 3rd class is a secondary transmission dropout type; But owing to adopt the secondary machine driving to thread off or snap close, make the complete machine structure complexity, the back that not only very easily takes place to thread off is replied not in place, Control Failure when causing restore electricity next time; And complete machine is individual big, and mobility is poor.

The objective of the invention is present situation at existing earth leakage protective device, hope can provide a kind of simple in structure, volume is little, cheap, the earth leakage protective device that safety and reliability are high.

The dropout type earth leakage protective device that the inventor provides; be a kind of new type electric leakageproof device with above-mentioned advantage, its primary structure characteristics are: this earth leakage protective device is formed by tripping mechanism, housing, printed circuit board (PCB), pin and based on the electric-leakage detection circuit of zero-sequence transformer, executive circuit etc.Its concrete structure is that described tripping mechanism is made up of the snap close axle of trip line bag, button, skateboard component, band spring, the reed of drive contact, the pin of band fixed contact etc.; Wherein button passes printed circuit board (PCB), and tandem arrangement is in the overcoat of skateboard component, and the energy upper and lower displacement; Disposing stage clip between button and the circuit board, its underpart one connector is affixed with reed one end that drives the contact, and the other end of this reed then links to each other with coil on the zero-sequence transformer; The overcoat of described skateboard component is equipped with a horizontal jack with the button middle part of being inserted in wherein; This jack faces the snap close axle of being located at the band spring in the trip line bag; This trip line bag is horizontally placed under the circuit board; Described zero-sequence transformer is made up of magnet ring and induction coil, and the pin of band fixed contact is fixedly arranged in lower housing portion.

Described electric-leakage detection circuit is made up of with coupling capacitance C1, anti-interference capacitor C2 zero-sequence transformer.Its executive circuit is by unidirectional controllable silicon S CR, biasing resistor R1, R2, R3, voltage stabilizing didoe, and rectifier diode D2, D3, D4, D5 form.

According to the dropout type earth leakage protective device of above conceptual design, compare with existing a few class earth leakage protective devices, have the following advantages: the one, in the electronic circuit without amplifier.Without the self-bias circuit, reduced to lose in earlier stage and put, improved device reliability; The 2nd, adopt the direct trip of one-level mechanical type, simple in structure, volume is little, mobility good, is applicable to the earth leakage protective device of multiple civil power system, modification is strong; The 3rd, cheap, itself power consumption is small.

Accompanying drawing 1 is the utility model tripping mechanism structural representation.

Accompanying drawing 2 is schematic circuits of the present utility model.

Further describe the utility model below in conjunction with accompanying drawing, and provide embodiment of the present utility model.

In accompanying drawing 1:

(1) be printed circuit board (PCB), (2) are the trip line bag, and (3) are button, and (4) are skateboard component, (5) be housing, (6) are the fixing break of pin, and (7) are pin, (8) for driving the reed of contact, (9) are zero-sequence transformer, the snap close axle of (10) band spring.

Pass printed circuit board (PCB) (1) by the button (3) of forming tripping mechanism shown in the figure, tandem arrangement is in the overcoat of skateboard component (4), and the energy upper and lower displacement; Joining stage clip between button (3) and circuit board (1), its underpart is affixed with reed (8) one ends that drive the contact, and the other end of reed (8) then links to each other with coil on the zero-sequence transformer (9); The overcoat of skateboard component (4) and button (3) middle part that is placed in wherein have a horizontal jack, and this jack faces the snap close axle (10) of being located at the band spring in the trip line bag (2); Trip line bag (2) is horizontally placed under the circuit board (1), and described zero-sequence transformer (9) is made up of magnet ring and induction coil.

Described electric-leakage detection circuit is made up of with coupling capacitance C1, anti-interference capacitor C2 zero-sequence transformer (9).

Described executive circuit is made up of unidirectional controllable silicon S CR, biasing resistor R1, R2, R3, voltage stabilizing didoe D1, rectifier diode D2, D3, D4, D5.

Its course of work is: when electric leakage took place consuming device, leakage current met or exceeded 5 MAHs, and zero-sequence transformer (9) is sent a voltage-type signal, and this signal is an AC type.It drives unidirectional controllable silicon S CR conducting through the control utmost point that coupling capacitor C1 delivers to the SCR in the executive circuit (2).The SCR conducting just makes the trip line bag (2) in the tripping mechanism have a big electric current to flow through.Make it produce electromagnetic attraction; The snap close axle (10) of band spring is sucked trip line bag (2).After snap close axle (10) withdraws from transverse holes on the skateboard component (4), button (3) is under the effect of its downside stage clip, driving skateboard component (4) moves upward, made originally reed (8) pressure that drives contact was removed, this reed (8) is upwarped, break away from the fixedly fixedly break of pin (7), cut off the electricity supply.This process is exceedingly fast, and only needs about 15 milliseconds of times.

After leak current fault is got rid of, press the button (3), skateboard component (4) moves downward thereupon, the snap close axle (10) of band spring is because spring action, make it to insert automatically the transverse holes on the skateboard component (4), and the reed (8) that will drive contact simultaneously presses down and break (6) joins, and realizes power connection, restores electricity.

Can make the earth leakage protective device that is applicable to countries in the world civil power system by R1, R2, the resistance of three biasing resistors of R3, the utility model in the adjustment accompanying drawing 2.

Claims

1, a kind of dropout type earth leakage protective device is by tripping mechanism housing (5), printed circuit board (PCB) (1), and forms based on the electric-leakage detection circuit and the executive circuit of zero-sequence transformer (9), it is characterized in that:

A, described tripping mechanism are made up of the snap close axle (10) of trip line bag (2), button (3), skateboard component (4), band spring, the reed (8) of drive point, and its button (3) passes the also energy upper and lower displacement in the overcoat of skateboard component (4) of printed circuit board (PCB) (1), tandem arrangement; Disposing stage clip between button (3) and circuit board (1), its underpart one connector is affixed with reed (8) one ends that drive the contact; The other end of reed (8) then links to each other with coil on the zero-sequence transformer (9); The overcoat of described skateboard component (4) and button (3) middle part of being inserted in wherein have a horizontal jack; This jack faces the snap close axle (10) of being located at the band spring in the trip line bag (2); This trip line bag (2) is horizontally placed under the circuit board (1); Described zero-sequence transformer (9) is made up of magnet ring and induction coil;

B, described electric-leakage detection circuit are by zero-sequence transformer (9) and coupling capacitance C1, and anti-interference capacitor C2 forms;

C, described executive circuit are by unidirectional controllable silicon S CR, biasing resistor R1, R2, R3, and voltage stabilizing didoe D1, rectifier diode D2, D3, D4, D5 form.