CN105356409A - Automatic electrifying circuit for earth leakage protection apparatus - Google Patents
Automatic electrifying circuit for earth leakage protection apparatus Download PDFInfo
- Publication number
- CN105356409A CN105356409A CN201510834207.3A CN201510834207A CN105356409A CN 105356409 A CN105356409 A CN 105356409A CN 201510834207 A CN201510834207 A CN 201510834207A CN 105356409 A CN105356409 A CN 105356409A
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- CN
- China
- Prior art keywords
- circuit
- earth leakage
- leakage protective
- automatic
- electric capacity
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/14—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to occurrence of voltage on parts normally at earth potential
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Relay Circuits (AREA)
Abstract
The invention discloses an automatic electrifying circuit for an earth leakage protection apparatus. The automatic electrifying circuit for an earth leakage protection apparatus comprises a rectifying circuit, a mechanism interlocking device and an earth leakage protection circuit, and is also provided with an automatic electrifying trigger circuit, an electrifying coil L1 and a silicon controlled rectifier Q2, wherein the automatic electrifying trigger circuit is connected with a trigger electrode of the silicon controlled rectifier Q2; the electrifying coil L1 is used for pulling-in the mechanism interlocking device; and the electrifying coil L1 can be electrically connected with the silicon controlled rectifier Q2 so that the Q2 is conducted and the electrifying coil L1 is pulled-in. The automatic electrifying circuit for an earth leakage protection apparatus can use fewer elements to realize single trigger, thus saving the special circuit and reducing the cost and the volume. The key point of the automatic electrifying pull-in technology lies in automatic trigger and secondary man-made passive trigger, and can be extended to the multipurpose application field; the electrifying pull-in means equivalent switching and replaces a high power relay control mode; and the secondary passive trigger can realize expansion and application of the singlechip and can realize an intelligent combination control mode.
Description
Technical field
The present invention relates to earth leakage protective device technical field, particularly the automatic electrification circuit of a kind of earth leakage protective device.
Background technology
Single-phase silicon-controlledly to be used in direct current once will there be maintenance conducting function after triggering, if being used in after triggering in alternating current caused controllable silicon to automatically shut down because controllable silicon anode has exist null cycle, to use in alternating current-direct current Hybrid mode circuit to allow controllable silicon and under the prerequisite of not power-off, realize conducting or cut-off and the angle of flow is controlled, dedicated trigger circuit must be had, due to special circuit cost high and need outward element assist, cause wiring board volume large, installing space is restricted often, not easily Miniaturization Design.
Summary of the invention
(1) technical problem that will solve
Object of the present invention will overcome above-mentioned shortcoming exactly, aims to provide the automatic electrification circuit of a kind of earth leakage protective device.
(2) technical scheme
For achieving the above object, the automatic electrification circuit of earth leakage protective device of the present invention, comprises rectification circuit, mechanism's interlock and leakage protection circuit, is also provided with the circuits for triggering that automatically power on, upper electric coil L1 and controllable silicon Q2; The described circuits for triggering that automatically power on connect controllable silicon Q2 trigger electrode, and described upper electric coil L1 is used for adhesive mechanism interlock; Upper electric coil L1 and controllable silicon Q2 is electrically connected, Q2 conducting, upper electric coil L1 adhesive.
The described circuits for triggering that automatically power on comprise storage capacitor C1, triode Q1, electric capacity C2 and resistance R3; Described resistance R3 one end connects storage capacitor C1 positive pole, and the other end connects electric capacity C2, and described triode Q1 base stage is controlled by electric capacity C2; Described triode Q1 collector electrode connects one end of electric capacity C3, and the described electric capacity C3 other end and controllable silicon Q2 trigger electrode are electrically connected.
Also comprise secondary switching circuit, described secondary switching circuit is the loop that reset key S1, diode D2 and described electric capacity C2 are formed.
Resistance R2 is provided with between described storage capacitor C1 and triode Q1 collector electrode; Described controllable silicon Q2 trigger electrode is connected with electric capacity C4 and resistance R5.
Between the electric capacity C3 other end and controllable silicon Q2 trigger electrode, voltage stabilizing didoe D7 is set.
Described resistance R2, electric capacity C3, voltage stabilizing didoe D7, resistance R5 and electric capacity C4 form delay control circuit.
The delay time of described delay control circuit is adjustable.
Described leakage protection circuit comprises the zero sequence current mutual inductor for responding to zero live wire electric leakage, and for responding to the ground wire instrument transformer of ground wire electric leakage, and earth leakage protective IC; Earth leakage protective IC is for receiving the induced potential of zero sequence current mutual inductor and ground wire instrument transformer.
Described voltage stabilizing didoe D7 dropping resistor replaces.
The controllable silicon Q3 also comprising power-off coil L2 and be electrically connected with power-off coil L2, described power-off coil L2 are used for release mechanism interlock, and described controllable silicon Q3 trigger electrode is controlled by earth leakage protective IC.
(3) beneficial effect
Compared with prior art, technical scheme of the present invention has the following advantages: realize single with less element and trigger, save special circuit, reduce cost and volume; Automatically the adhesive key problem in technology that powers on automatically triggers and the artificial passive triggering of secondary, this functional realiey may extend into multipurpose and uses field, power on adhesive and equivalent switch, instead of high power relay control mode and the passive triggering of secondary can realize single-chip microcomputer extension uses and achieve intelligent combination control model.
Accompanying drawing explanation
Fig. 1 is the module map of the automatic electrification circuit of earth leakage protective device of the present invention;
Fig. 2 is the circuit theory diagrams of the embodiment one of the automatic electrification circuit of earth leakage protective device of the present invention;
Fig. 3 is the circuit theory diagrams of the embodiment two of the automatic electrification circuit of earth leakage protective device of the present invention;
Fig. 4 is the circuit theory diagrams that in Fig. 2 of the present invention, dropping resistor substitutes voltage stabilizing didoe;
Fig. 5 is the circuit theory diagrams that in Fig. 3 of the present invention, dropping resistor substitutes voltage stabilizing didoe.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Embodiment one
Circuit module figure as shown in Figure 1, the automatic electrification circuit of earth leakage protective device of the present invention, comprise rectification circuit, mechanism interlock S2-S3 and leakage protection circuit, rectification circuit comprises current-limiting resistance R1 and rectifier diode D1, is also provided with the circuits for triggering that automatically power on, upper electric coil L1 and controllable silicon Q2; The described circuits for triggering that automatically power on connect controllable silicon Q2 trigger electrode, and described upper electric coil L1 is used for adhesive mechanism interlock S2-S3; Upper electric coil L1 and controllable silicon Q2 is electrically connected, Q2 conducting, upper electric coil L1 adhesive.
As shown in Figure 2, the described circuits for triggering that automatically power on comprise storage capacitor C1, triode Q1, electric capacity C2 and resistance R3 to circuit theory diagrams; Described resistance R3 one end connects storage capacitor C1 positive pole, and the other end connects electric capacity C2, and described triode Q1 base stage is controlled by electric capacity C2; Described triode Q1 collector electrode connects one end of electric capacity C3, and the described electric capacity C3 other end and controllable silicon Q2 trigger electrode are electrically connected.Wherein, storage capacitor C1 is parallel with voltage stabilizing didoe D6.
In the present embodiment, in order to ensure the stability of subsequent voltage, between the electric capacity C3 other end and controllable silicon Q2 trigger electrode, voltage stabilizing didoe D7 is set.
Also comprise secondary switching circuit, described secondary switching circuit is the loop that reset key S1, diode D2 and described electric capacity C2 are formed.
Resistance R2 is provided with between described storage capacitor C1 and triode Q1 collector electrode; Described controllable silicon Q2 trigger electrode is connected with electric capacity C4 and resistance R5.
Described resistance R2, electric capacity C3, voltage stabilizing didoe D7, resistance R5 and electric capacity C4 form delay control circuit.Voltage stabilizing didoe D7 can ensure the accuracy of delay time.
As shown in Figure 4,5, described voltage stabilizing didoe D7 dropping resistor RV1 replaces.
The delay time of described delay control circuit is adjustable.
Described leakage protection circuit comprises the zero sequence current mutual inductor ZCT1 for responding to zero live wire electric leakage, and for responding to the ground wire instrument transformer ZCT2 of ground wire electric leakage, and earth leakage protective IC; Earth leakage protective IC is for receiving the induced potential of zero sequence current mutual inductor ZCT1 and ground wire instrument transformer ZCT2.
The controllable silicon Q3 also comprising power-off coil L2 and be electrically connected with power-off coil L2, described power-off coil L2 are used for release mechanism interlock S2-S3, and described controllable silicon Q3 trigger electrode is controlled by earth leakage protective IC.
Embodiment two
As shown in Figure 3, increase anti-interference capacitor, improve the interference free performance of earth leakage protective device at resistance R3 two ends, diode D2 can substitute with resistance R6.
Operation principle of the present invention is as follows
Automatically upper Electricity Functional
Switch on power, supply voltage through R1 current limliting, D1 rectification, C1 filtering, after D6 voltage stabilizing, through R3, C2 makes Q1 saturation conduction, completes delayed and makes complete machine be in stable state, after C2 voltage is full of, supply voltage is through R2, C3, D7 make Q2 controlled silicon conducting 20 ~ 30mS (time is adjustable), now go up electric coil L1 adhesive 1 time, the synchronous adhesive of adhesive driving mechanical interlock S2-S3 of upper electric coil L1 self-locking, load continuous is powered output; When load zero sequence current mutual inductor ZCT1 or ground wire instrument transformer ZCT2 has leakage current, earth leakage protective IC protective circuit drives controllable silicon Q3 conducting, and power-off coil L2 adhesive, makes load switch S2, S3 synchronous release, thus achieve leakage tripping defencive function;
Electricity Functional on secondary
For off-position, press reset key S1, C2 terminal voltage forms short-circuit loop release through S1, D2, after unclamping S1, namely get back to the trigger mode that automatically powers on, and load obtains electricity and exports.
This circuit has following features
1, switch on power and automatically power on and maintain mechanical self-latching load supplying state;
Load auto-breaking and maintain mechanical self-latching state when 2, producing electric leakage or test button by K1;
3, protective circuit is connected to mechanism interlock S2-S3 output switching terminal, and under mechanism interlock S2-S3 off-state, load circuit element is without the need to consuming electric energy;
4, the release of S1 reset switch effectively, can realize each triggered time to guarantee unanimously;
5, for guaranteeing that low-voltage does not allow work, adjust R2 in circuit, R3 divider resistance scale parameter can realize low-voltage not flop phenomenon, protects controller and the electricity consumption of electricity consumption payload security.
The present invention realizes single with less element and triggers, and saves special circuit, reduces cost and volume; Automatically the adhesive key problem in technology that powers on automatically triggers and the artificial passive triggering of secondary, this functional realiey may extend into multipurpose and uses field, power on adhesive and equivalent switch, instead of high power relay control mode and the passive triggering of secondary can realize single-chip microcomputer extension uses and achieve intelligent combination control model.
In sum, above-mentioned execution mode is not restricted execution mode of the present invention, and the modification that all those skilled in the art carry out on the basis of flesh and blood of the present invention or equivalent deformation, all at technology category of the present invention.
Claims (10)
1. the automatic electrification circuit of earth leakage protective device, comprises rectification circuit, mechanism's interlock and leakage protection circuit, it is characterized in that: be also provided with the circuits for triggering that automatically power on, upper electric coil L1 and controllable silicon Q2; The described circuits for triggering that automatically power on connect controllable silicon Q2 trigger electrode, and described upper electric coil L1 is used for adhesive mechanism interlock; Upper electric coil L1 and controllable silicon Q2 is electrically connected.
2. the automatic electrification circuit of earth leakage protective device as claimed in claim 1, is characterized in that: the described circuits for triggering that automatically power on comprise storage capacitor C1, triode Q1, electric capacity C2 and resistance R3; Described resistance R3 one end connects storage capacitor C1 positive pole, and the other end connects electric capacity C2, and described triode Q1 base stage is controlled by electric capacity C2; Described triode Q1 collector electrode connects one end of electric capacity C3, and the trigger electrode of the described electric capacity C3 other end and controllable silicon Q2 is electrically connected.
3. the automatic electrification circuit of earth leakage protective device as claimed in claim 2, is characterized in that: also comprise secondary switching circuit, and described secondary switching circuit is the loop that reset key S1, diode D2 and described electric capacity C2 are formed.
4. the automatic electrification circuit of earth leakage protective device as claimed in claim 2, is characterized in that: be provided with resistance R2 between described storage capacitor C1 and triode Q1 collector electrode; Described controllable silicon Q2 trigger electrode is connected with electric capacity C4 and resistance R5.
5. the automatic electrification circuit of earth leakage protective device as claimed in claim 2, is characterized in that: arrange voltage stabilizing didoe D7 between the described electric capacity C3 other end and controllable silicon Q2 trigger electrode.
6. the automatic electrification circuit of earth leakage protective device as claimed in claim 5, is characterized in that: described resistance R2, electric capacity C3, voltage stabilizing didoe D7, resistance R5 and electric capacity C4 form delay control circuit.
7. the automatic electrification circuit of earth leakage protective device as claimed in claim 6, is characterized in that: the delay time of described delay control circuit is adjustable.
8. the automatic electrification circuit of earth leakage protective device as claimed in claim 6, it is characterized in that: described leakage protection circuit comprises the zero sequence current mutual inductor for responding to zero live wire electric leakage, and for responding to the ground wire instrument transformer of ground wire electric leakage, and earth leakage protective IC; Earth leakage protective IC is for receiving the induced potential of zero sequence current mutual inductor and ground wire instrument transformer.
9. the automatic electrification circuit of earth leakage protective device as claimed in claim 6, is characterized in that: described voltage stabilizing didoe D7 dropping resistor replaces.
10. the automatic electrification circuit of earth leakage protective device as claimed in claim 8; it is characterized in that: the controllable silicon Q3 also comprising power-off coil L2 and be electrically connected with power-off coil L2; described power-off coil L2 is used for release mechanism interlock, and described controllable silicon Q3 trigger electrode is controlled by earth leakage protective IC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510834207.3A CN105356409B (en) | 2015-11-26 | 2015-11-26 | The automatic electrification circuit of earth leakage protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510834207.3A CN105356409B (en) | 2015-11-26 | 2015-11-26 | The automatic electrification circuit of earth leakage protective device |
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| Publication Number | Publication Date |
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| CN105356409A true CN105356409A (en) | 2016-02-24 |
| CN105356409B CN105356409B (en) | 2018-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510834207.3A Active CN105356409B (en) | 2015-11-26 | 2015-11-26 | The automatic electrification circuit of earth leakage protective device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11233719A (en) * | 1998-02-17 | 1999-08-27 | Matsushita Electric Ind Co Ltd | Semiconductor device |
| CN2862412Y (en) * | 2005-12-31 | 2007-01-24 | 黄华道 | End-to-life display circuit for earth leakage protective receptacle |
| CN203398755U (en) * | 2013-06-04 | 2014-01-15 | 长沙高升电子电器科技有限公司 | Three-phase earth leakage protection and power-off automatic recovery apparatus |
| CN104868443A (en) * | 2015-05-15 | 2015-08-26 | 余姚市嘉荣电子电器有限公司 | Automatic power-on intelligent-type electric leakage protector |
| CN205195230U (en) * | 2015-11-26 | 2016-04-27 | 余姚市嘉荣电子电器有限公司 | Circuit in earthleakage protective equipment automation |
-
2015
- 2015-11-26 CN CN201510834207.3A patent/CN105356409B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11233719A (en) * | 1998-02-17 | 1999-08-27 | Matsushita Electric Ind Co Ltd | Semiconductor device |
| CN2862412Y (en) * | 2005-12-31 | 2007-01-24 | 黄华道 | End-to-life display circuit for earth leakage protective receptacle |
| CN203398755U (en) * | 2013-06-04 | 2014-01-15 | 长沙高升电子电器科技有限公司 | Three-phase earth leakage protection and power-off automatic recovery apparatus |
| CN104868443A (en) * | 2015-05-15 | 2015-08-26 | 余姚市嘉荣电子电器有限公司 | Automatic power-on intelligent-type electric leakage protector |
| CN205195230U (en) * | 2015-11-26 | 2016-04-27 | 余姚市嘉荣电子电器有限公司 | Circuit in earthleakage protective equipment automation |
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| Publication number | Publication date |
|---|---|
| CN105356409B (en) | 2018-09-14 |
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