CN206353695U - Leakage-current alarm does not trip module - Google Patents

Abstract

Leakage-current alarm does not trip module, including residual current protecting module and warning circuit, residual current protecting module includes being used to detect the zero sequence current mutual inductor of the leakage current of main circuit, the regulation circuit handled for the signal for exporting zero sequence current mutual inductor, for the integrated chip to being judged and being handled come the level signal for the circuit that is self-regulated, the drive circuit controlled by integrated chip, rectification circuit and reduction voltage circuit, the input of rectification circuit is connected with main circuit, the DC output end of rectification circuit is through reduction voltage circuit and drive circuit, integrated chip is connected, regulation circuit on one side is connected with zero sequence current mutual inductor, the other end is connected with integrated chip, first output end of integrated chip and the input of drive circuit are connected, the output end of drive circuit and the second output end of integrated chip are connected and are connected with warning circuit, the positive pole of warning circuit, the positive pole of negative pole respectively with the DC output end of rectification circuit, negative pole is connected.

Description

Leakage-current alarm does not trip module

Technical field

The utility model is related to Low Voltage Electrical Apparatus, and in particular to a kind of leakage-current alarm does not trip module.

Background technology

Residual current action breaker is widely used in the circuit of directly contact protection against electric shock and mediate contact protection against electric shock In networking, when human body touches electrical body or apparatus insulated damage forms earth fault if can automatic shutoff circuit, but some set It is standby cannot directly automatic shutoff circuit, the safe emergency set of such as public place, antitheft equipment, fire-fighting under special place Equipment etc., so need to be alarmed while continuous open circuit when occurring residual current in circuit, but in the market The alarm of the residual current action breaker module that do not trip generally requires user and accesses independent work when in use for alarm module Make power supply, can then make when working power fails warning circuit can not normal work, great potential safety hazard is left, moreover, mesh The alarm module of preceding in the market is generally relay driving pattern, i.e., send signal by residual current protecting module, and this signal is straight The driving actuating of relay is connect, relay carries out self-locking operation, and the action of drive signal output relay reaches alarm signal output Purpose, the method is not only complicated, it is necessary to multiple relay interoperations, and the requirement to power supply is higher.

The content of the invention

The purpose of this utility model is to overcome the defect of prior art, and there is provided a kind of high leakage of simple in construction, reliability Electric alarm does not trip module.

To achieve the above object, the utility model employs following technical scheme：

A kind of leakage-current alarm does not trip module, including residual current protecting module and warning circuit, residual current protecting mould Block includes the zero sequence current mutual inductor TA of the leakage current for detecting main circuit S, for zero sequence current mutual inductor TA to be exported Signal handled regulation circuit, for the integrated chip to being judged and being handled come the level signal for the circuit that is self-regulated IC, the drive circuit controlled by integrated chip IC, rectification circuit and reduction voltage circuit, input and the main circuit S of rectification circuit connect Connect, the DC output end of rectification circuit is connected through reduction voltage circuit with drive circuit and integrated chip IC, adjust circuit on one side and zero Sequence current transformer TA connections, the other end is connected with integrated chip IC, integrated chip IC the first output end and drive circuit Input is connected, and the output end of drive circuit is connected with integrated chip IC the second output end and is connected with warning circuit, is alarmed Positive pole, positive pole, the negative pole of negative pole respectively with the DC output end of rectification circuit of circuit are connected.

Optionally, the warning circuit includes signal input circuit and warning output loop, and signal input circuit includes string Be associated in the controllable silicon VT1 in the supply line in warning output loop, controllable silicon VT1 control end and the output end of drive circuit and Integrated chip IC the second output end connection, when integrated chip IC judges to have residual current, integrated chip IC makes driving electricity Road exports high current, and integrated chip IC makes the supply lines in warning output loop by controllable silicon VT1 control end with drive circuit Road conducting is alarmed.

Optionally, the warning circuit also includes power supply treatment loop, and power supply treatment loop one end is connected with rectification circuit For power taking and decompression, the power supply treatment loop other end is connected with controllable silicon VT1 anode, controllable silicon VT1 negative electrode and alarm Output loop is connected.

Optionally, the power supply treatment loop include dropping resistor R10 and SR SB, dropping resistor R10 one end with The positive pole connection of the DC output end of rectification circuit, the other end is connected with SR SB one end, the SR SB other ends and Controllable silicon VT1 anode connection.

Optionally, the warning output loop includes relay KM, current-limiting resistance R11 and indicator lamp LED, relay KM's Negative pole of the two ends of pull-in winding respectively with controllable silicon VT1 negative electrode and the DC output end of rectification circuit is connected, current-limiting resistance R11 and indicator lamp LED strip connection after two ends respectively at controllable silicon VT1 negative electrode and rectification circuit DC output end negative pole connect Connect.

Optionally, the reduction voltage circuit includes dropping resistor R5, controllable silicon VT2, VT3 of series connection and is connected in parallel on controllable silicon The piezo-resistance RV4 at the two ends after VT2, VT3 series connection, it is in parallel after one end and the positive pole of rectification circuit connect, the other end with it is whole The negative pole connection of current circuit, controllable silicon VT2 negative electrode is connected with controllable silicon VT3 anode, and control pole and resistance R5 one end connect Connect, the resistance R5 other end passes sequentially through the positive pole connection of diode VD7 and resistance R6 and rectification circuit, diode VD7 sun Node between pole and resistance R6 is connected with integrated chip IC and drive circuit.

Optionally, the drive circuit includes electric capacity C5, electric capacity C6 and resistance R4, and electric capacity C6 one end connects with rectification circuit Connect, the other end is connected with integrated chip IC the 7th pin 7, connected between electric capacity C5 one end and electric capacity C6 and the 7th pin 7, separately One end is connected with integrated chip IC the 6th pin 6, and resistance R4 one end is connected with integrated chip IC the 7th pin 7, another End is connected with rectification circuit.

Optionally, the regulation circuit includes resistance R0, R1, R2, R3 and electric capacity C1, C2, zero sequence current mutual inductor TA's One end is connected by resistance R2 with integrated chip IC the first pin 1, and the other end passes through the second of resistance R3 and integrated chip IC Pin 2 is connected, and the two ends of resistance R0, R1 and electric capacity C1 respectively with zero sequence current mutual inductor TA are in parallel, in resistance R2 and integrated core Electric capacity C2 is connected between resistance R3 and integrated chip IC second pin 2 between piece IC the first pin 1.

Optionally, in addition to electric capacity C7, electric capacity C7 positive pole are connected with integrated chip IC positive source 8, negative pole and collection Power cathode 3 into chip IC is connected；The rectification circuit is three-phase full wave rectifier circuit, and rectification circuit is connected to including negative electrode Diode VD1, VD3, VD5 and anode of the positive pole of formation rectification circuit form the negative pole of rectification circuit together after linking together Diode VD2, VD4, VD5, the positive pole of rectification circuit is connected with reduction voltage circuit and warning circuit, the negative pole and report of rectification circuit Alert circuit, drive circuit and integrated chip IC connections, diode VD1, VD3, VD5 anode respectively with diode VD2, VD4, VD5 negative electrode connection, three-phase power line is connected to diode VD1 and diode VD2, diode by surge protection circuit Between VD3 and diode VD4, diode VD5 and diode VD6.

Optionally, leakage-current alarm of the present utility model does not trip module also including test circuit, and test circuit includes setting Relative to the second auxiliary winding D2, SR SB2 and the resistance of the first auxiliary winding D1 other ends on zero sequence current mutual inductor TA RT, SR SB2 one end are connected with three-phase power line, and the other end is connected with the second auxiliary winding D2, resistance RT one end and the The node connection between diode VD1 and diode VD2 is connected on two auxiliary winding D2 connections, the other end and three-phase power line.

Leakage-current alarm of the present utility model do not trip module by by the positive pole of warning circuit, negative pole respectively with rectification circuit The positive pole of DC output end, negative pole connection, directly from internal power taking, without being independently accessed working power, can avoid missing, wrong Connect external power supply and in external power-fail due to the potential safety hazard that warning circuit fails and brings, and use more It is convenient.In addition, also realizing the electrical demands of self-locking to drive Control alarm signal using the half control characteristic of controllable silicon Output, not only reduces practicality and the design cost of component, also reduces the overall power of warning circuit, using reliability Aspect has higher advantage.

Brief description of the drawings

Fig. 1 is that the utility model leakage-current alarm does not trip the structural representation of module；

Fig. 2 is the structural representation of the utility model warning circuit；

Fig. 3 is the structural representation of the utility model relay.

Embodiment

The embodiment provided below in conjunction with accompanying drawing 1 to 3, further illustrates that leakage-current alarm of the present utility model does not trip module Embodiment.The leakage-current alarm of the present utility model module that do not trip is not limited to the following description.

As shown in figure 1, leakage-current alarm of the present utility model does not trip, module includes residual current protecting module and alarm electricity Road, residual current protecting module includes being used to detect the zero sequence current mutual inductor TA of main circuit S residual current, for by zero sequence Current transformer TA output signal handled regulation circuit, for judging come the level signal for the circuit that is self-regulated Integrated chip IC with processing, the drive circuit controlled by integrated chip IC, it is that drive circuit and integrated chip IC provide power supply Rectification circuit and reduction voltage circuit, the input of rectification circuit is connected with main circuit S, the DC output end of rectification circuit is through decompression Circuit is connected with drive circuit and integrated chip IC, and the first auxiliary winding D1 of regulation circuit on one side and zero sequence current mutual inductor TA connects Connect, the other end is connected with integrated chip IC, integrated chip IC the first output end and the input of drive circuit are connected, driving electricity The output end on road is connected with integrated chip IC the second output end and is connected with warning circuit, positive pole, the negative pole point of warning circuit Positive pole, negative pole not with the DC output end of rectification circuit are connected.The level that integrated chip IC can be exchanged after the conditioning of economize on electricity road Signal judged, when it is more than or equal to defined threshold, then exports a drive signal, when drive circuit receive it is described Drive signal when, conducting immediately forms the loop of a high current, when have high current can by when, by drive circuit and integrated The output alarm signal of the 7th pin 7 driving alarm module of chip IC is alarmed, warning circuit of the present utility model it is direct from Internal power taking replaces external power supply, because warning circuit can not normal work and the peace brought when can avoid the external power supply from failing Full hidden danger, regulation circuit the regulation such as can be filtered and/or be depressured and/or amplify and handle.

As shown in Fig. 2 the warning circuit includes power supply treatment loop, signal input circuit and warning output loop, electricity Source treatment loop one end is connected to power taking and decompression with rectification circuit, and signal input circuit is used to receive residual current alarm letter Number, warning output loop can be alarmed when there is residual current alarm signal, and power supply treatment loop includes dropping resistor R10 With SR SB, power supply is drawn by the DC output end of rectification circuit, is linked into terminals L1 (L3), the L2 of warning circuit, Signal input circuit is accessed after dropping resistor R1 decompressions, then through SR SB, dropping resistor R10 one end and rectification circuit The positive pole connection of DC output end, the other end is connected with SR SB one end, and the SR SB other ends are inputted back with signal The controllable silicon VT1 on road anode connection.Signal input circuit is controllable in the supply line in warning output loop including being connected on Silicon VT1, controllable silicon VT1 control end and the output end of drive circuit and the connection of integrated chip IC the second output end, integrated When chip IC judges to have residual current, integrated chip IC the first output end is that the 6th pin 6 makes the big electricity of drive circuit output Stream, integrated chip IC makes the supply line in warning output loop turn on progress with drive circuit by controllable silicon VT1 control end Alarm, controllable silicon VT1 anode is connected with the SR SB of power supply treatment loop, and control pole passes through node NET1 and integrated core Piece IC the second output end is that the 7th pin 7 is connected, and negative electrode is connected with warning output loop.

Warning output loop includes DC24V relays KM, current-limiting resistance R11 and indicator lamp LED, relay KM adhesive line Negative pole of the two ends of circle respectively with controllable silicon VT1 negative electrode and the DC output end of rectification circuit is connected, and current-limiting resistance R11 and is referred to Show lamp LED strip connection after two ends respectively at controllable silicon VT1 negative electrode and rectification circuit DC output end negative pole connection, with reference to Fig. 3, relay KM include movable contact B11 and stationary contact B12, B14, and movable contact B11 and stationary contact B12 connects when relay KM disconnects Touch, relay KM turn on when movable contact B11 contacted with stationary contact B14, NET1 as residual current alarm signal input, when Residual current protecting module is detected when there is residual current, and NET1 can receive the signal that residual current protecting module is sent, Controllable silicon VT1 control relays KM conductings are driven, so as to export residual current alarm electric signal and indicator lamp LED light letter Number, indicator lamp LED can also replace with other alarm equipments such as buzzer.

The utility model also includes the reduction voltage circuit being connected with integrated chip IC, drive circuit and rectification circuit, decompression electricity Road includes dropping resistor R5, and reduction voltage circuit accesses integrated chip IC through resistance R5 decompressions for DC20V, and reduction voltage circuit also includes series connection Controllable silicon VT2, VT3, the piezo-resistance RV4 at the two ends being connected in parallel on after controllable silicon VT2, VT3 series connection, it is in parallel after one end with it is whole The negative pole of the positive pole connection of current circuit, the other end and rectification circuit is connected, controllable silicon VT2 negative electrode and controllable silicon VT3 anode Connection, control pole is connected with resistance R5 one end, and the resistance R5 other end passes sequentially through diode VD7 and resistance R6 and rectified current The positive pole connection on road, the node between diode VD7 anode and resistance R6 is connected with integrated chip IC and drive circuit.

The drive circuit connects the control loop to be formed, and electric capacity C5, electric capacity including at least one Thyristors in series C6 and resistance R4, electric capacity C6 one end are connected with rectification circuit, and the other end is connected with integrated chip IC the 7th pin 7, electric capacity C5 Connected between one end and electric capacity C6 and the 7th pin 7, the other end is connected with integrated chip IC the 6th pin 6, the one of resistance R4 End is connected with integrated chip IC the 7th pin 7, and the other end is connected with rectification circuit.The leakage-current alarm module that do not trip is also wrapped Electric capacity C7 is included, electric capacity C7 positive pole is connected with integrated chip IC positive source 8, the power cathode 3 of negative pole and integrated chip IC Connection, electric capacity C7 primarily serves the effect of filtering, it is ensured that integrated chip IC dc source is reliable.

Leakage-current alarm of the present utility model does not trip module also including electric capacity C3 and electric capacity C4, and electric capacity C3 one end is connected to Between the resistance R2 and integrated chip IC that adjust circuit the first pin 1, the other end and integrated chip IC the 3rd pin 3 and whole Current circuit is connected, and electric capacity C4 one end is connected with integrated chip IC the 4th pin 4 and the 5th pin 5, the other end and rectified current Road is connected.

The regulation circuit includes resistance R0, R1, R2, R3 and electric capacity C1, C2, and zero sequence current mutual inductor TA one end passes through Resistance R2 is connected with integrated chip IC the first pin 1, and the other end is connected by resistance R3 and integrated chip IC second pin 2 Connect, the two ends of resistance R0, R1 and electric capacity C1 respectively with zero sequence current mutual inductor TA are in parallel, the of resistance R2 and integrated chip IC Electric capacity C2 is connected between resistance R3 and integrated chip IC second pin 2 between one pin 1.

The rectification circuit is three-phase full wave rectifier circuit, and rectification circuit is joined together to form rectification circuit including negative electrode Positive pole diode VD1, VD3, VD5 and anode link together after formed the diode VD2 of negative pole of rectification circuit, VD4, VD5, the positive pole of rectification circuit is connected with reduction voltage circuit and warning circuit, negative pole and warning circuit, the drive circuit of rectification circuit With integrated chip IC connections, the negative electrode of diode VD1, VD3, VD5 anode respectively with diode VD2, VD4, VD5 is connected, and three Phase power line by surge protection circuit be connected to diode VD1 and diode VD2, diode VD3 and diode VD4, Between diode VD5 and diode VD6, as long as there is any live wire to have electricity, then warning circuit can be carried out work.It is described Surge protection circuit includes piezo-resistance RV1, RV2 and the RV3 being connected between three live wires.

Leakage-current alarm of the present utility model does not trip module also including test circuit, and test circuit includes being arranged on zero sequence electricity Relative to the second auxiliary winding D2, SR SB2 and the resistance RT of the first auxiliary winding D1 other ends on current transformer TA, reset is pressed Button SB2 one end is connected with three-phase power line, and the other end is connected with the second auxiliary winding D2, resistance RT one end and the second auxiliary winding D2 The node connection between diode VD1 and diode VD2 is connected on connection, the other end and three-phase power line.

Above content is to combine specific preferred embodiment further detailed description of the utility model, it is impossible to Assert that specific implementation of the present utility model is confined to these explanations.For the ordinary skill of the utility model art For personnel, without departing from the concept of the premise utility, some simple deduction or replace can also be made, should all be regarded To belong to protection domain of the present utility model.

Claims (10)

1. The module 1. a kind of leakage-current alarm does not trip, including residual current protecting module and warning circuit, it is characterised in that：Remaining electricity Stream protection module includes being used to detect the zero sequence current mutual inductor (TA) of the leakage current of main circuit (S), for by zero-sequence current Regulation circuit that the signal of transformer (TA) output is handled, for being judged come the level signal for the circuit that is self-regulated and The integrated chip (IC) of processing, drive circuit, rectification circuit and the reduction voltage circuit controlled by integrated chip (IC), rectification circuit Input is connected with main circuit (S), and the DC output end of rectification circuit is through reduction voltage circuit and drive circuit and integrated chip (IC) Connection, regulation circuit on one side is connected with zero sequence current mutual inductor (TA), and the other end is connected with integrated chip (IC), integrated chip (IC) input of the first output end and drive circuit is connected, the output end of drive circuit and the second of integrated chip (IC) defeated Go out end to connect and be connected with warning circuit, the positive pole of warning circuit, negative pole positive pole respectively with the DC output end of rectification circuit, Negative pole is connected.
2. The module 2. leakage-current alarm according to claim 1 does not trip, it is characterised in that：It is defeated that the warning circuit includes signal Entry loop and warning output loop, signal input circuit include the controllable silicon being connected in the supply line in warning output loop The second output end connection of VT1, controllable silicon VT1 control end and the output end of drive circuit and integrated chip (IC), integrated When chip (IC) judges to have residual current, integrated chip (IC) makes drive circuit export high current, and integrated chip (IC) is with driving Dynamic circuit makes supply line's conducting in warning output loop be alarmed by controllable silicon VT1 control end.
3. The module 3. leakage-current alarm according to claim 2 does not trip, it is characterised in that：The warning circuit also includes power supply Treatment loop, power supply treatment loop one end and rectification circuit are connected to power taking and decompression, the power supply treatment loop other end with can Silicon VT1 anode connection is controlled, controllable silicon VT1 negative electrode is connected with warning output loop.
4. The module 4. leakage-current alarm according to claim 3 does not trip, it is characterised in that：The power supply treatment loop includes drop The positive pole connection of the DC output end of piezoresistance R10 and SR SB, dropping resistor R10 one end and rectification circuit, the other end It is connected with SR SB one end, the SR SB other ends are connected with controllable silicon VT1 anode.
5. The module 5. leakage-current alarm according to claim 2 does not trip, it is characterised in that：The warning output loop include after Electrical equipment (KM), current-limiting resistance R11 and indicator lamp (LED), the two ends of the pull-in winding of relay (KM) are respectively with controllable silicon VT1's Two ends difference after the negative pole connection of the DC output end of negative electrode and rectification circuit, current-limiting resistance R11 and indicator lamp (LED) series connection In controllable silicon VT1 negative electrode and rectification circuit DC output end negative pole connection.
6. The module 6. leakage-current alarm according to claim 1 does not trip, it is characterised in that：The reduction voltage circuit includes decompression electricity Resistance R5, controllable silicon VT2, VT3 of series connection and the two ends being connected in parallel on after controllable silicon VT2, VT3 series connection piezo-resistance RV4, after parallel connection One end and the positive pole of rectification circuit connect, the negative pole of the other end and rectification circuit is connected, controllable silicon VT2 negative electrode and controllable silicon VT3 anode connection, control pole is connected with resistance R5 one end, and the resistance R5 other end passes sequentially through diode VD7 and resistance The positive pole connection of R6 and rectification circuit, node and integrated chip (IC) and driving between diode VD7 anode and resistance R6 Circuit is connected.
7. The module 7. leakage-current alarm according to claim 1 does not trip, it is characterised in that：The drive circuit includes electric capacity C5, electric capacity C6 and resistance R4, electric capacity C6 one end are connected with rectification circuit, and the 7th pin (7) of the other end and integrated chip IC connects Connect, be connected between electric capacity C5 one end and electric capacity C6 and the 7th pin (7), the 6th pin (6) of the other end and integrated chip IC connects Connect, resistance R4 one end is connected with integrated chip IC the 7th pin (7), and the other end is connected with rectification circuit.
8. The module 8. leakage-current alarm according to claim 1 does not trip, it is characterised in that：The regulation circuit includes resistance R0, R1, R2, R3 and electric capacity C1, C2, one end of zero sequence current mutual inductor (TA) pass through resistance R2 and the first of integrated chip (IC) Pin (1) is connected, and the other end is connected by resistance R3 with the second pin (2) of integrated chip (IC), resistance R0, R1 and electric capacity C1 Two ends respectively with zero sequence current mutual inductor (TA) are in parallel, between resistance R2 and the first pin (1) of integrated chip (IC) with Electric capacity C2 is connected between resistance R3 and the second pin (2) of integrated chip (IC).
9. The module 9. leakage-current alarm according to claim 7 does not trip, it is characterised in that：Also include electric capacity C7, electric capacity C7's Positive pole is connected with integrated chip IC positive source, and negative pole is connected with integrated chip IC power cathode；The rectification circuit is Three-phase full wave rectifier circuit, rectification circuit include negative electrode be joined together to form the diode VD1 of positive pole of rectification circuit, VD3, VD5 and anode form diode VD2, VD4, VD5 of the negative pole of rectification circuit, the positive pole and drop of rectification circuit after linking together Volt circuit and warning circuit connection, the negative pole of rectification circuit are connected with warning circuit, drive circuit and integrated chip (IC), two poles Negative electrode of pipe VD1, VD3, VD5 anode respectively with diode VD2, VD4, VD5 is connected, and three-phase power line passes through surge protection electricity Road be connected to diode VD1 and diode VD2, diode VD3 and diode VD4, diode VD5 and diode VD6 it Between.
10. The module 10. leakage-current alarm according to claim 1 does not trip, it is characterised in that：Also include test circuit, test electricity Road includes being arranged on the second auxiliary winding (D2) on zero sequence current mutual inductor (TA) relative to the first auxiliary winding (D1) other end, multiple Position button SB2 and resistance RT, SR SB2 one end is connected with three-phase power line, and the other end is connected with the second auxiliary winding (D2), Resistance RT one end is connected with the second auxiliary winding (D2), and the other end on three-phase power line with being connected to diode VD1 and diode Node connection between VD2.