CN2909341Y

CN2909341Y - Control circuit of earth leakage protective device with service life stop indication and trip

Info

Publication number: CN2909341Y
Application number: CN 200620074227
Authority: CN
Inventors: 陈景正
Original assignee: 陈景正
Current assignee: Suzhou Lumeisi Electrical Co., Ltd.
Priority date: 2006-06-20
Filing date: 2006-06-20
Publication date: 2007-06-06
Anticipated expiration: 2016-06-20

Abstract

The utility model relates to a leakage protection control circuit with end-of-life indication or release, which is characterized in that based on the common leakage protection device, an abnormal monitoring circuit is added so as to monitor the faults of the automatic monitoring leakage protection device. Once the key spare part is in abnormal situation, the automatic fault indication will appear or directly release so as to avoid safety accidents caused by the failure of the leakage protection device and ensure the personal safety in the case of leakage.

Description

The earth leakage protective device control circuit that tape lifetime stops indication or threads off

Affiliated technical field

The utility model relates to the earth leakage protective device control circuit that a kind of tape lifetime stops indication or threads off.

Background technology

Existing family expenses earth leakage circuit breaker on the market; only when taking place, electric leakage just can thread off; and it is powerless when breaking down as a product self for earth leakage protective device; in case this thing happens; be that earth leakage protective device self damages; even leak electricity so, earth leakage protective device also can't normally be threaded off, so that unnecessary personal injury or property loss occur.

Summary of the invention

In order to overcome the problems referred to above of prior art, the purpose of this utility model provides and a kind ofly occurs when unusual at earth leakage protective device itself, can indicate in advance or the earth leakage protective device control circuit of direct trip.

The technical scheme that its technical matters that solves the utility model adopts is: primary input line 1H, 2N passes inductance L 1, capacitor C 1 and capacitor C 2 series connection backs are in parallel with inductance L 1, common port is connected to power supply negative terminal by resistance R 5 in the middle of capacitor C 1 and the capacitor C 2, inductance L 1 one ends and capacitor C 5, resistance R 6 is connected in series to 1 pin of single-chip microcomputer IC1, inductance L 1 other end is connected to 3 pin of single-chip microcomputer IC1, be used for detecting electric leakage, 5 pin of single-chip microcomputer IC1 connect resistance R 14, and through C10 ground connection rear drive controllable silicon SCR 2, controllable silicon SCR 2 series diode D5, D6, D7, D8 and tripping relay RELAY-2; Single-chip microcomputer IC1 supply pin 6 connects resistance R 11 and stabilivolt D3 negative pole, the anodal and anodal series connection of diode D9 of stabilivolt D3, and diode D9 negative pole is connected to ground through luminotron D2 positive pole; Single-chip microcomputer IC1 supply pin 6 connects stabilivolt D10 negative pole, stabilivolt D10 cathode series resistance R13, and resistance R 13 other ends are connected to triode Q1 base stage, and triode Q1 emitter connects power supply negative terminal, and collector is connected to luminotron D2 positive pole by resistance R 10; Reset circuit links to each other with primary power, S2 again connects after capacitor C 7, resistance R 8 parallel connections, the other end of S2 is connected to controllable silicon SCR 1 control pin, and controllable silicon SCR 1 control pin parallel resistance R9, capacitor C 6 are formed the instantaneous trigger circuit, and controllable silicon SCR 1 links to each other with latch-in relay RELY-1.

The anode of controllable silicon SCR 2 is connected to by diode D5, D6, D7, the positive pole of the bridge rectifier that D8 forms, the negative electrode of controllable silicon SCR 2 is connected to by diode D5, D6, D7, the negative pole of the bridge rectifier that D8 forms, the interchange input series connection tripping relay RELAY-2 of rectifier bridge, the tripping relay RELAY-2 other end is connected to the power supply phase line.

Output phase line one end links to each other with luminotron D1 is anodal, luminotron D1 negative pole resistance in series R4, and resistance R 4 other ends are connected to diode D4 positive pole, and diode D4 negative pole is connected to zero power lead.

The novel advantage of this use is: when under normal circumstances electric leakage taking place, can reliably thread off, and when standby; be exactly when electric leakage not taking place; when earth leakage protective device generation itself is unusual, can find early intuitively with the luminotron indication; perhaps direct trip; conscientiously protection people's life security reduces because of the earth leakage protective device faults itself and can't thread off after leaking electricity, and the people is caused injury; disable, the accident that causes death takes place.

Description of drawings

Below in conjunction with drawings and Examples detailed content of the present utility model is described.

Accompanying drawing 1 is circuit theory diagrams of the present utility model.

Embodiment

As shown in the figure, primary input line 1H of the present utility model, 2N passes inductance L 1, capacitor C 1 and capacitor C 2 series connection backs are in parallel with inductance L 1, common port is connected to power supply negative terminal by resistance R 5 in the middle of capacitor C 1 and the capacitor C 2, inductance L 1 one ends and capacitor C 5, resistance R 6 is connected in series to 1 pin of single-chip microcomputer IC1, single-chip microcomputer IC1 can be RV4145 or 54123, inductance L 1 other end is connected to 3 pin of single-chip microcomputer IC1, be used for detecting electric leakage, 5 pin of single-chip microcomputer IC1 connect resistance R 14, and through C10 ground connection rear drive controllable silicon SCR 2, controllable silicon SCR 2 series diode D5, D6, D7, D8 and tripping relay RELAY-2; Single-chip microcomputer IC1 supply pin 6 connects resistance R 11 and stabilivolt D3 negative pole, the anodal and anodal series connection of diode D9 of stabilivolt D3, and diode D9 negative pole is connected to ground through luminotron D2 positive pole; Single-chip microcomputer IC1 supply pin 6 connects stabilivolt D10 negative pole, stabilivolt D10 cathode series resistance R13, and resistance R 13 other ends are connected to triode Q1 base stage, and triode Q1 emitter connects power supply negative terminal, and collector is connected to luminotron D2 positive pole by resistance R 10; Reset circuit links to each other with primary power, through capacitor C 7, S2 again connects after resistance R 8 parallel connections, the other end of S2 is connected to controllable silicon SCR 1 control pin, controllable silicon SCR 1 control pin parallel resistance R9, capacitor C 6 is formed the instantaneous trigger circuit, controllable silicon SCR 1 links to each other with latch-in relay RELY-1, the anode of controllable silicon SCR 2 is connected to by diode D5, D6, D7, the positive pole of the bridge rectifier that D8 forms, the negative electrode of controllable silicon SCR 2 is connected to by diode D5, D6, D7, the negative pole of the bridge rectifier that D8 forms, the interchange input series connection tripping relay RELAY-2 of rectifier bridge, the tripping relay RELAY-2 other end is connected to the power supply phase line.Output phase line one end links to each other with luminotron D1 is anodal, luminotron D1 negative pole resistance in series R4, and resistance R 4 other ends are connected to diode D4 positive pole, and diode D4 negative pole is connected to zero power lead.

During connection, AC power through two primary input circuit 1H, 2N, is passed inductance L 1 by connection terminal, and L2 is controlled by main contacts, powers to the load to output wiring terminal again.When standby, incoming line 1H is by fuse F1, coil RELAY-2, and through D5, D6, D7, D8 rectification and 2N constitute the loop, and the output DC source by resistance R 12 step-downs, powers to IC1.Inductance L 1, L2, resistance R 6, R7, capacitor C 1, C2, C3, C4, the public composition electric-leakage detection circuit of C5 and IC1 will be if electric leakage will cause that L1 has induction current to produce, and makes IC1 input end 1,3 change, and 5 pin produce output, drive controllable silicon SCR 2, tripping coil RELAY-2 energising, and main contacts disconnects.

The exception monitoring circuit divides four parts: 1, and leakage current detects parts C1, C2 electric leakage, short circuit monitoring, 2, the too high monitoring of IC1 supply voltage, 3, the IC1 supply voltage is crossed low monitoring, and 4, SCR1, SCR2 one of them or two puncture indication simultaneously or thread off.

At C1, when C2 electric leakage or short circuit, the input end of IC1 is changed, cause IC1 that output is arranged, the tripping coil energising, main contacts disconnects; D3, D9, R11, D2 constitute the too high observation circuit of supply voltage jointly, and when supply voltage was higher than setting value, D2 was bright, the indication operation irregularity; D10, R13, Q1 together constitute supply voltage and cross low observation circuit, and when supply voltage was lower than setting value, D2 was bright, indication earth leakage protective device operation irregularity; The controllable silicon SCR that resets 1, dropout controllable silicon SCR 2 puncture, and all can cause the overheated F1 fusing of coil, and luminotron D2 is bright, the indication operation irregularity.When SCR2 punctures, the tripping coil energising, main contacts disconnects, the load outage.Output indicator D1 extinguishes.In all cases, if main contacts disconnects, output indicator D1 can extinguish.Divide folding as follows in detail:

1, leakage current detects parts C1, C2 electric leakage, short circuit monitoring.C1, C2 connects mutually, and non-common port is parallel on the magnetic test coil L1, being equivalent to a capacity is C1, half electric capacity and L1 parallel connection of C2, C1, the common port of C2 is connected to power-by a very big resistance R 5 of resistance, in capacitor C 1, when electric leakage takes place for C2 wherein any one or two, the capital makes the input end of IC1 have signal to change, voltage step-down, IC15 pin output control signal, trigger the SCR2 energising, tripping coil energising, main contacts disconnect cuts off load, and D1 extinguishes.

2, the IC1 supply voltage is too high, R11, the series connection of D3 negative terminal, D3 anode and the series connection of D9 anode, the other end of R11 is connected on the supply pin 6 of IC1, and the D9 negative terminal is connected to the anode of luminotron D2, the D2 negative terminal is connected to power-, surpasses D3, D9 at supply voltage, the ratings of D2 series connection (different IC may be slightly different), luminotron D2 is bright, because R10 and triode Q1 series connection are arranged, even this moment, Q1 was conducting, D2 still can be normally shinny, indication IC1 abnormity of power supply.

3, the IC1 supply voltage is low excessively, the D10 negative terminal is connected to the IC1 supply pin, anode and resistance R 13 series connection, resistance R 13 other ends are connected to transistor base, drive triode, under the power supply normal condition, be higher than D10 exactly and add triode be utmost point 0.7v pressure drop summation, triode Q1 conducting makes luminotron D2 both end voltage about 0.3v, can't be shinny.If supply voltage is low excessively, be lower than D10 and add triode be utmost point 0.7v pressure drop summation, triode Q1 ends so, and power supply is by R2, and R2, R10 be to the anode of luminotron D2, luminotron D2 electrified light emitting.And because there is D9 oppositely to connect, electric current can not pass through D9, and D3, R11,6 pin of IC1 are to ground, and indication IC1 supply voltage is low excessively.

4, SCR1, SCR2 one of them or two puncture indication simultaneously, thread off.Key components and parts SCR1; SCR2 is any one puncture or puncture simultaneously wherein; the capital causes resetting coil RELAY-1; the long-time energising of among the tripping coil RELAY-2 one or two; the coil of leakage tripping device is switched on for a long time; can cause coil seriously to generate heat; temperature of fusion fuse F1, the accident that prevents is further upgraded, and eliminates the hidden danger of fire; simultaneously because the coil no power; resistance R 16 is connected on whole main circuit, the power supply of IC1 is seriously descended, by the analysis of step 3; luminotron D2 is luminous, and the indication earth leakage protective device is unusual.And when only SCR2 punctured, earth leakage protective device was threaded off, and main contacts disconnects, and cut off load, under the situation of the continuous heating power of RELAY-2, and fuse F1 fusing, luminotron D2 is bright.

Claims

1, the earth leakage protective device control circuit that a kind of tape lifetime stops indication or threads off, it is characterized in that: primary input line 1H, 2N passes inductance L 1, capacitor C 1 and capacitor C 2 series connection backs are in parallel with inductance L 1, common port is connected to power supply negative terminal by resistance R 5 in the middle of capacitor C 1 and the capacitor C 2, inductance L 1 one ends and capacitor C 5, resistance R 6 is connected in series to 1 pin of single-chip microcomputer IC1, inductance L 1 other end is connected to 3 pin of single-chip microcomputer IC1, be used for detecting electric leakage, 5 pin of single-chip microcomputer IC1 connect resistance R 14, and through C10 ground connection rear drive controllable silicon SCR 2, controllable silicon SCR 2 series diode D5, D6, D7, D8 and tripping relay RELAY-2; Single-chip microcomputer IC1 supply pin 6 connects resistance R 11 and stabilivolt D3 negative pole, the anodal and anodal series connection of diode D9 of stabilivolt D3, and diode D9 negative pole is connected to ground through luminotron D2 positive pole; Single-chip microcomputer IC1 supply pin 6 connects stabilivolt D10 negative pole, stabilivolt D10 cathode series resistance R13, and resistance R 13 other ends are connected to triode Q1 base stage, and triode Q1 emitter connects power supply negative terminal, and collector is connected to luminotron D2 positive pole by resistance R 10; Reset circuit links to each other with primary power, S2 again connects after capacitor C 7, resistance R 8 parallel connections, the other end of S2 is connected to controllable silicon SCR 1 control pin, and controllable silicon SCR 1 control pin parallel resistance R9, capacitor C 6 are formed the instantaneous trigger circuit, and controllable silicon SCR 1 links to each other with latch-in relay RELY-1.

2, tape lifetime according to claim 1 stops the earth leakage protective device control circuit of indication or dropout; the anode that it is characterized in that controllable silicon SCR 2 is connected to by diode D5; D6, D7, the positive pole of the bridge rectifier that D8 forms; the negative electrode of controllable silicon SCR 2 is connected to by diode D5; D6, D7, the negative pole of the bridge rectifier that D8 forms; the interchange input series connection tripping relay RELAY-2 of rectifier bridge, the tripping relay RELAY-2 other end is connected to the power supply phase line.

3, tape lifetime according to claim 1 and 2 stops the earth leakage protective device control circuit of indication or dropout; it is characterized in that exporting phase line one end links to each other with luminotron D1 is anodal; luminotron D1 negative pole resistance in series R4; resistance R 4 other ends are connected to diode D4 positive pole, and diode D4 negative pole is connected to zero power lead.