CN106229942A - A kind of control circuit of earth leakage protective device - Google Patents
A kind of control circuit of earth leakage protective device Download PDFInfo
- Publication number
- CN106229942A CN106229942A CN201610877264.4A CN201610877264A CN106229942A CN 106229942 A CN106229942 A CN 106229942A CN 201610877264 A CN201610877264 A CN 201610877264A CN 106229942 A CN106229942 A CN 106229942A
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- China
- Prior art keywords
- module
- resistance
- alternating current
- control signal
- zero
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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
- H02H3/26—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
Abstract
nullThe invention discloses the control circuit of a kind of earth leakage protective device，Include the alternating current input interface accessed for zero live wire being sequentially connected with、Can be resetted the relay switch disconnected、And the alternating current output interface for zero live wire output，Zero live wire between described relay switch and alternating current output interface be provided with for leakage current test and when detecting that leakage current exceedes preset value the zero sequence current mutual inductor module of output dropout control signal，Described control circuit also includes the relay coil corresponding with described relay switch、And it is connected in parallel on described alternating current input interface the AC-DC conversion module for powering side by side to described relay coil and described zero sequence current mutual inductor module，Described AC-DC conversion module outfan is also parallel with controlled diverter module，Described controlled diverter module control signal input is connected with the dropout control signal outfan of described zero sequence current mutual inductor module.This case simple in construction easily realizes, and practicality is good.
Description
[technical field]
The present invention relates to the control circuit of a kind of earth leakage protective device.
[background technology]
The control circuit of existing earth leakage circuit-breaker, its structure is complicated, it is necessary to improve.
[summary of the invention]
Instant invention overcomes the deficiency of above-mentioned technology, it is provided that the control circuit of a kind of earth leakage protective device, its structure letter
Single easily realization, practicality is good.
For achieving the above object, present invention employs following technical proposal:
The control circuit of a kind of earth leakage protective device, includes the alternating current input accessed for zero live wire being sequentially connected with
Interface 1, the relay switch 2 of the disconnection that can reset and the alternating current output interface 3 for zero live wire output, described relay
Zero live wire between switch 2 and alternating current output interface 3 is provided with for leakage current test and is detecting that leakage current exceedes
Exporting the zero sequence current mutual inductor module 4 of dropout control signal during preset value, described control circuit also includes and described relay
Device switchs the relay coil 5 of 2 correspondences and is connected in parallel on described alternating current input interface 1 for described relay coil 5
The AC-DC conversion module 6 powered side by side with described zero sequence current mutual inductor module 4, described AC-DC conversion module 6 outfan
Also it is parallel with controlled diverter module 7, described controlled diverter module 7 control signal input and described zero sequence current mutual inductor module
The dropout control signal outfan of 4 is connected.
The control circuit of a kind of earth leakage protective device as above, described AC-DC conversion module 6 includes pressure-sensitive electricity
Resistance MOV, resistance R1, resistance R2A, resistance R2B, diode D1, diode D2, electric capacity C1 and polar capacitor C2, described pressure-sensitive
Resistance MOV one end is connected with described alternating current input interface 1 zero line as described AC-DC conversion module 6 one power input
End, diode D1 positive pole, polar capacitor C2 negative pole be connected after as described AC-DC conversion module 6 negative power supply outfan,
The described varistor MOV other end connects with the input of described alternating current as described another power input of AC-DC conversion module 6
Mouth 1 live wire connects end, resistance R1 one end is connected, the described resistance R1 other end and described resistance R2A one end, electric capacity C1 one end phase
Connecting, the described resistance R2A other end is by described resistance R2B and described diode D1 negative pole, the electric capacity C1 other end, diode D2
Positive pole is connected, described diode D2 negative pole be connected with described polar capacitor C2 positive pole after as described AC-DC conversion module
6 cathode power supply outfans are connected.
The control circuit of a kind of earth leakage protective device as above, described controlled diverter module 7 includes resistance R3, electricity
Hold C3 and triode-thyristor SCR, described resistance R3 one end as described controlled diverter module 7 one power connector end with described
AC-DC conversion module 6 one power output end is connected, and the described resistance R3 other end is connected with described triode-thyristor SCR positive pole
End, described triode-thyristor SCR negative pole connects after end is connected with described electric capacity C3 one end another as described controlled diverter module 7
One power connector end is connected with described another power output end of AC-DC conversion module 6, and described triode-thyristor SCR controls letter
Number input be connected with the described electric capacity C3 other end after as described controlled diverter module 7 control signal input and described zero
The dropout control signal outfan of sequence current transformer module 4 is connected.
The control circuit of a kind of earth leakage protective device as above, described alternating current input interface 1 and described alternating current
Being also associated with the test switch module 8 for producing leakage current between output interface 3, described test switch module 8 includes electricity
Resistance R8 and manual test switch TEST, described resistance R8 one end is connected end with described alternating current input interface 1 zero line and is connected, institute
State the resistance R8 other end to be connected end with described alternating current output interface 3 live wire be connected by described manual test switch TEST.
Compared with prior art, the invention has the beneficial effects as follows:
1, this case simple in construction easily realizes, and during use, described alternating current input interface connects external communication electricity, and described friendship is straight
Stream modular converter carries out the backward described relay coil of AC-DC conversion and described zero sequence current mutual inductor module for power supply, when manually
When making described relay switch connect, described relay coil holds described under the power supply function of described AC-DC conversion module
Relay switch and maintain it to connect；If some time described zero sequence current mutual inductor module detects that leakage current exceedes preset value, to
Output dropout control signal, controls the conducting of described controlled diverter module and shunts so that electric current fall on described relay coil
Low and can not maintain the connection of described relay switch, described relay switch resets and disconnects, it is achieved safety protection control.
2, AC-DC conversion module uses capacitance-resistance voltage reduction circuit, and it advantageously reduces heating during work.
[accompanying drawing explanation]
Fig. 1 is the structured flowchart of this case.
Fig. 2 be this case be embodied as one of circuit diagram.
Fig. 3 be this case be embodied as the two of circuit diagram.
Fig. 4 be this case be embodied as the three of circuit diagram.
Fig. 5 be this case be embodied as the four of circuit diagram.
[detailed description of the invention]
Feature of present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, in order to
Understanding in technical staff of the same trade:
As Figure 1-5, the control circuit of a kind of earth leakage protective device, include be sequentially connected with for zero live wire access
Alternating current input interface 1, the relay switch that can reset 2 and for zero live wire output alternating current output interface 3,
Zero live wire between described relay switch 2 and alternating current output interface 3 is provided with for leakage current test and is detecting
The zero sequence current mutual inductor module 4 of output dropout control signal when leakage current exceedes preset value, described control circuit also includes
The relay coil 5 corresponding with described relay switch 2 and being connected in parallel on described alternating current input interface 1 for described
The AC-DC conversion module 6 that relay coil 5 and described zero sequence current mutual inductor module 4 are powered side by side, described AC-DC conversion
Module 6 outfan is also parallel with controlled diverter module 7, described controlled diverter module 7 control signal input and described zero sequence electricity
The dropout control signal outfan of current transformer module 4 is connected.
As it has been described above, the operation principle of this case is as follows:
During use, described alternating current input interface 1 connects external communication electricity, and described AC-DC conversion module 6 carries out handing over directly
Backward described relay coil 5 is changed in circulation and described zero sequence current mutual inductor module 4 is powered, when manually making described relay switch
2 when connecting, described relay coil 5 under the power supply function of described AC-DC conversion module 6, hold described relay switch 2 and
Maintain it to connect；If some time described zero sequence current mutual inductor module 4 detects that leakage current exceedes preset value, thread off to output and control
Signal processed, control described controlled diverter module 7 conducting shunt so that current reduction on described relay coil 5 and can not
Maintaining the connection of described relay switch 2, described relay switch 2 resets and disconnects, it is achieved safety protection control.
During as it has been described above, be embodied as, described AC-DC conversion module 6 includes varistor MOV, resistance R1, resistance
R2A, resistance R2B, diode D1, diode D2, electric capacity C1 and polar capacitor C2, described varistor MOV one end is as institute
State AC-DC conversion module 6 one power input and be connected end, diode D1 positive pole, pole with described alternating current input interface 1 zero line
Property electric capacity C2 negative pole be connected after as described AC-DC conversion module 6 negative power supply outfan, described varistor MOV another
End is connected end, resistance R1 as described another power input of AC-DC conversion module 6 with described alternating current input interface 1 live wire
One end is connected, and the described resistance R1 other end is connected with described resistance R2A one end, electric capacity C1 one end, described resistance R2A another
End is connected with described diode D1 negative pole, the electric capacity C1 other end, diode D2 positive pole by described resistance R2B, described two poles
Pipe D2 negative pole is connected as described AC-DC conversion module 6 cathode power supply outfan after being connected with described polar capacitor C2 positive pole
Connect.
As it has been described above, this case AC-DC conversion module 6 uses capacitance-resistance voltage reduction circuit, sending out when it advantageously reduces work
Heat.
During as it has been described above, be embodied as, it is controlled that described controlled diverter module 7 includes resistance R3, electric capacity C3 and three ends
Silicon SCR, described resistance R3 one end is as described controlled diverter module 7 one power connector end and described AC-DC conversion module 6 one
Power output end is connected, the described resistance R3 other end and described triode-thyristor SCR anode connection terminal, described triode-thyristor
SCR negative pole connects after end is connected with described electric capacity C3 one end as described controlled another power connector end of diverter module 7 and institute
State another power output end of AC-DC conversion module 6 to be connected, described triode-thyristor SCR control signal input and described electricity
Hold after the C3 other end is connected as described controlled diverter module 7 control signal input and described zero sequence current mutual inductor module
The dropout control signal outfan of 4 is connected.
During as it has been described above, be embodied as, also connect between described alternating current input interface 1 and described alternating current output interface 3
Being connected to the test switch module 8 for producing leakage current, described test switch module 8 includes resistance R8 and manual test switch
TEST, described resistance R8 one end is connected end with described alternating current input interface 1 zero line and is connected, and the described resistance R8 other end passes through
Described manual test switch TEST is connected end with described alternating current output interface 3 live wire and is connected.
As it has been described above, in Fig. 2-Fig. 5 of this case, give several different embodiment party of zero sequence current mutual inductor module 4
Formula, it contributes to leakage current test, not as the restriction to this case protection domain.
As it has been described above, this case protection is the control circuit of a kind of earth leakage protective device, all identical with this case structure or
Close technical scheme all should be shown as in the protection domain falling into this case.
Claims (4)
1. the control circuit of an earth leakage protective device, it is characterised in that include the friendship accessed for zero live wire being sequentially connected with
Stream electricity input interface (1), the relay switch (2) of the disconnection that can reset and the alternating current output interface for zero live wire output
(3), zero live wire between described relay switch (2) and alternating current output interface (3) be provided with for leakage current test and
The zero sequence current mutual inductor module (4) of output dropout control signal when detecting that leakage current exceedes preset value, described controls electricity
Road also includes the relay coil (5) corresponding with described relay switch (2) and is connected in parallel on described alternating current input interface
(1) upper for described relay coil (5) and the AC-DC conversion mould of described zero sequence current mutual inductor module (4) power supply side by side
Block (6), described AC-DC conversion module (6) outfan is also parallel with controlled diverter module (7), described controlled diverter module (7)
Control signal input is connected with the dropout control signal outfan of described zero sequence current mutual inductor module (4).
The control circuit of a kind of earth leakage protective device the most according to claim 1, it is characterised in that described AC-DC conversion
Module (6) include varistor MOV, resistance R1, resistance R2A, resistance R2B, diode D1, diode D2, electric capacity C1 and
Polar capacitor C2, described varistor MOV one end exchanges with described as described AC-DC conversion module (6) power input
As described AC-DC conversion after electricity input interface (1) zero line connects end, diode D1 positive pole, polar capacitor C2 negative pole are connected
Module (6) negative power supply outfan, the described varistor MOV other end is as described another power supply of AC-DC conversion module (6)
Input is connected end with described alternating current input interface (1) live wire, resistance R1 one end is connected, the described resistance R1 other end and institute
Stating resistance R2A one end, electric capacity C1 one end to be connected, the described resistance R2A other end is by described resistance R2B and described diode D1
Negative pole, the electric capacity C1 other end, diode D2 positive pole are connected, and described diode D2 negative pole is connected with described polar capacitor C2 positive pole
It is connected as described AC-DC conversion module (6) cathode power supply outfan after connecing.
The control circuit of a kind of earth leakage protective device the most according to claim 1, it is characterised in that described controlled divergent die
Block (7) includes resistance R3, electric capacity C3 and triode-thyristor SCR, and described resistance R3 one end is as described controlled diverter module
(7) one power connector ends are connected with described AC-DC conversion module (6) power output end, the described resistance R3 other end and institute
State triode-thyristor SCR anode connection terminal, after described triode-thyristor SCR negative pole connection end is connected with described electric capacity C3 one end
As described another power connector end of controlled diverter module (7) and described another power output end phase of AC-DC conversion module (6)
Connect, described triode-thyristor SCR control signal input be connected with the described electric capacity C3 other end after as described controlled point
Flow module (7) control signal input is connected with the dropout control signal outfan of described zero sequence current mutual inductor module (4).
4. according to the control circuit of a kind of earth leakage protective device described in claim 1-3 any one, it is characterised in that described
The test switch for producing leakage current it is also associated with between alternating current input interface (1) and described alternating current output interface (3)
Module (8), described test switch module (8) includes resistance R8 and manual test switch TEST, described resistance R8 one end and institute
Stating alternating current input interface (1) zero line connection end to be connected, the described resistance R8 other end switchs TEST by described manual test
It is connected end is connected with described alternating current output interface (3) live wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610877264.4A CN106229942A (en) | 2016-09-30 | 2016-09-30 | A kind of control circuit of earth leakage protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610877264.4A CN106229942A (en) | 2016-09-30 | 2016-09-30 | A kind of control circuit of earth leakage protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106229942A true CN106229942A (en) | 2016-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610877264.4A Pending CN106229942A (en) | 2016-09-30 | 2016-09-30 | A kind of control circuit of earth leakage protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106229942A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106773994A (en) * | 2017-01-09 | 2017-05-31 | 浙江新涛电子科技股份有限公司 | The circuit and control method of a kind of SECO PE ground wires |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2387649Y (en) * | 1999-08-10 | 2000-07-12 | 李多赐 | Automatic protective instrument for preventing fraudulent use of electricity |
| CN101478099A (en) * | 2008-01-04 | 2009-07-08 | 创奇科技有限公司 | Neutral grounding fault creepage protecting plug |
| CN101834428A (en) * | 2010-05-20 | 2010-09-15 | 刘昭利 | AC mains over-voltage power-off protector |
| CN102231462A (en) * | 2011-04-19 | 2011-11-02 | 刘睿刚 | Leakage protection plug |
| CN103311884A (en) * | 2013-04-23 | 2013-09-18 | 上海良信电器股份有限公司 | Non-stick overvoltage and under-voltage protector with leakage protection function |
| CN206076917U (en) * | 2016-09-30 | 2017-04-05 | 中山市拓昊电器有限公司 | A kind of control circuit of earth leakage circuit-breaker device |
-
2016
- 2016-09-30 CN CN201610877264.4A patent/CN106229942A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2387649Y (en) * | 1999-08-10 | 2000-07-12 | 李多赐 | Automatic protective instrument for preventing fraudulent use of electricity |
| CN101478099A (en) * | 2008-01-04 | 2009-07-08 | 创奇科技有限公司 | Neutral grounding fault creepage protecting plug |
| CN101834428A (en) * | 2010-05-20 | 2010-09-15 | 刘昭利 | AC mains over-voltage power-off protector |
| CN102231462A (en) * | 2011-04-19 | 2011-11-02 | 刘睿刚 | Leakage protection plug |
| CN103311884A (en) * | 2013-04-23 | 2013-09-18 | 上海良信电器股份有限公司 | Non-stick overvoltage and under-voltage protector with leakage protection function |
| CN206076917U (en) * | 2016-09-30 | 2017-04-05 | 中山市拓昊电器有限公司 | A kind of control circuit of earth leakage circuit-breaker device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106773994A (en) * | 2017-01-09 | 2017-05-31 | 浙江新涛电子科技股份有限公司 | The circuit and control method of a kind of SECO PE ground wires |
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Application publication date: 20161214 |
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| RJ01 | Rejection of invention patent application after publication |