CN205195233U - Power leakage protector - Google Patents
Power leakage protector Download PDFInfo
- Publication number
- CN205195233U CN205195233U CN201520849479.6U CN201520849479U CN205195233U CN 205195233 U CN205195233 U CN 205195233U CN 201520849479 U CN201520849479 U CN 201520849479U CN 205195233 U CN205195233 U CN 205195233U
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- China
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- inductance
- output
- chip
- rectifier bridge
- relay
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- Expired - Fee Related
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Abstract
The utility model provides a power leakage protector, including detection module, control module and executable module, the detection circuitry module includes the mutual -inductor that first inductance, second inductance and the 3rd inductor group become, and alternating current power supply is connected respectively to the one end of first inductance and second inductance, another termination load, and draw through the wire at the both ends of third inductance, control module includes power supply circuit and control circuit, and power supply circuit includes alternating current power supply and rectifier bridge, and alternating current power supply is connected respectively to the first input end of rectifier bridge and second input, the first output ground connection of rectifier bridge, and the input of chip is connected to the second output, and the output of chip is through the coil ground connection of diode and relay, the executable module is the normally closed contact of relay, and a normally closed contact of relay sets up between first inductance and load, and the 2nd normally closed contact of relay sets up between second inductance and load. The utility model discloses can be when the electric leakage trouble takes place for the circuit supply interruption accurately, the action is sensitive, safe and reliable.
Description
Technical field
The utility model relates to electic protection field, particularly relates to a kind of earth leakage protective device.
Background technology
Along with rolling up of small household appliance and large electric equipment, the safety utilization of electric power problem thereupon brought also increases day by day, and the fire caused due to electric leakage is more and more frequent, and accident of getting an electric shock and dying also accounts for sizable proportion in all kinds of casualty accident.
Earth leakage protective utilizes earth leakage protective device to a kind of safety measure of the electric accident preventing circuit from causing due to leak current fault; earth leakage protective device is mainly cut off the electricity supply rapidly when electric leakage occurs circuit; prevent other power consumption equipments from causing damage, prevent people's error shock and the accident caused simultaneously.But existing earth leakage protective device adopts air switch mostly; air switch is after repeatedly tripping; sensitivity can decline; cause cutting off the electricity supply in time and leakage; if can not overhaul earth leakage protective device in time; earth leakage protective device will be caused aging, make circuit there is larger potential safety hazard.
Utility model content
The purpose of this utility model is to provide a kind of earth leakage protective device, can cut off the electricity supply exactly, be active in one's movements when circuit generation leak current fault, safe and reliable.
For achieving the above object, the utility model adopts following technical scheme:
A kind of earth leakage protective device, comprise detection module, control module and Executive Module, described testing circuit module comprises the instrument transformer of the first inductance, the second inductance and the 3rd inductance composition, first inductance is connected AC power respectively with one end of the second inductance, another terminating load, the two ends of the 3rd inductance are drawn through wire, described control module comprises power circuit and control circuit, power circuit comprises AC power and rectifier bridge, AC power is by rectifier bridge connection control circuit, the first input end of rectifier bridge is connected AC power respectively with the second input, first output head grounding of rectifier bridge, second output is by voltage stabilizing didoe ground connection, the two ends of voltage stabilizing didoe are parallel with the first electric capacity, the two ends of the first electric capacity are also parallel with photoelectrical coupler, the first input end of photoelectrical coupler connects one end of the 3rd inductance through the first resistance, second input of photoelectrical coupler connects the other end of the 3rd inductance through the first diode, first output of photoelectrical coupler connects the second output of rectifier bridge through the second resistance, second output head grounding of photoelectrical coupler, first output of photoelectrical coupler also connects the low triggering end of chip, direct clear terminal and the positive power source terminal of chip are connected the second output of rectifier bridge respectively, the negative power end ground connection of chip, control voltage end is through the second capacity earth, high-triggering end and the discharge end of chip are all connected the second output of rectifier bridge through the 3rd resistance, the high-triggering end of chip and discharge end are also through the 3rd capacity earth, the output of chip is through the coil ground connection of the second diode and relay, the two ends of relay coil are parallel with the 3rd diode, described Executive Module is the normally-closed contact of relay, and the first normally-closed contact of relay is arranged between the first inductance and load, and the second normally-closed contact of relay is arranged between the second inductance and load.
Described chip adopts NE555 chip.
Described second diode is light-emitting diode.
The pure circuit of the utility model replaces original air switch, judge whether circuit leaks electricity by instrument transformer, cut off the electricity supply by relay contact, circuit structure is simple, and with low cost, the actuating of relay is sensitive, safe and reliable, can ensure, at the instantaneous trip power supply that electric leakage occurs, misoperation can not occur, safe and reliable.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
As shown in Figure 1, the utility model comprises detection module, control module and Executive Module, detection module comprises the instrument transformer of the first inductance L 1, second inductance L 2 and the 3rd inductance L 3 composition, first inductance L 1 is connected AC power respectively with one end of the second inductance L 2, another terminating load, the two ends of the 3rd inductance L 3 are drawn through wire, control module comprises power circuit and control circuit, power circuit comprises AC power and rectifier bridge, AC power is by rectifier bridge connection control circuit, the first input end of rectifier bridge is connected AC power respectively with the second input, first output head grounding of rectifier bridge, second output is by voltage stabilizing didoe ZD ground connection, the two ends of voltage stabilizing didoe ZD are parallel with the first electric capacity C1, the two ends of the first electric capacity C1 are also parallel with photoelectrical coupler OC, the first input end of photoelectrical coupler OC connects one end of the 3rd inductance L 3 through the first resistance R1, second input of photoelectrical coupler OC connects the other end of the 3rd inductance L 3 through the first diode D1, first output of photoelectrical coupler OC connects through the second resistance the second output that R2 connects rectifier bridge, second output head grounding of photoelectrical coupler OC, first output of photoelectrical coupler OC also connects 2 pins (low triggering end) of NE555 chip, 4 pins (direct clear terminal) and 8 pins (positive power source terminal) of NE555 chip are connected the second output of rectifier bridge respectively, 1 pin (negative power end) ground connection of NE555 chip, 5 pins (control voltage end) are through the second electric capacity C2 ground connection, 6 pins (high-triggering end) and 7 pins (discharge end) of NE555 chip are all connected the second output of rectifier bridge through the 3rd resistance R3, 6 pins (high-triggering end) of NE555 chip and 7 pins (discharge end) are also through the 3rd electric capacity C3 ground connection, 3 pins (output) of NE555 chip are through the coil K1 ground connection of the second diode D2 and relay, second diode D2 is light-emitting diode, be used to refer to circuit and whether leak current fault occur, the two ends of relay coil K1 are parallel with the 3rd diode D3, Executive Module is the normally-closed contact of relay, and the first normally-closed contact K1-1 of relay is arranged between the first inductance L 1 and load, and the second normally-closed contact K1-2 of relay is arranged between the second inductance L 2 and load.
Under normal circumstances, total magnetic flux in whole instrument transformer is equal, when circuit generation leak current fault, the electric current flow through in first inductance L 1 and the second inductance L 2 is unequal, electric current is induced in the 3rd inductance L 3, electric current is through the first resistance R1, photoelectrical coupler OC, first diode D1 and the 3rd inductance L 3 form loop, triode now in photoelectrical coupler OC becomes low resistance state, 2 pins (low triggering end) of NE555 chip are low level, NE555 chip triggers, its 3 pin (output) exports high level, relay coil K1 obtains electric, its normally-closed contact K1-1 and K1-2 disconnects, power supply is cut off, simultaneously, second diode D2 is luminous, represent circuit generation leak current fault, staff is reminded to keep in repair.After the timing of NE555 chip, its 3 pin (output) recovers low level, relay coil K1 dead electricity, its normally-closed contact K1-1 and K1-2 closes, if now leak current fault is got rid of, circuit replys normal work, if leak current fault is not got rid of, relay coil K1 again electric, power supply is cut off again.
Claims (3)
1. an earth leakage protective device, it is characterized in that: comprise detection module, control module and Executive Module, described detection module comprises the instrument transformer of the first inductance, the second inductance and the 3rd inductance composition, first inductance is connected AC power respectively with one end of the second inductance, another terminating load, the two ends of the 3rd inductance are drawn through wire, described control module comprises power circuit and control circuit, power circuit comprises AC power and rectifier bridge, AC power is by rectifier bridge connection control circuit, the first input end of rectifier bridge is connected AC power respectively with the second input, first output head grounding of rectifier bridge, second output is by voltage stabilizing didoe ground connection, the two ends of voltage stabilizing didoe are parallel with the first electric capacity, the two ends of the first electric capacity are also parallel with photoelectrical coupler, the first input end of photoelectrical coupler connects one end of the 3rd inductance through the first resistance, second input of photoelectrical coupler connects the other end of the 3rd inductance through the first diode, first output of photoelectrical coupler connects the second output of rectifier bridge through the second resistance, second output head grounding of photoelectrical coupler, first output of photoelectrical coupler also connects the low triggering end of chip, direct clear terminal and the positive power source terminal of chip are connected the second output of rectifier bridge respectively, the negative power end ground connection of chip, control voltage end is through the second capacity earth, high-triggering end and the discharge end of chip are all connected the second output of rectifier bridge through the 3rd resistance, the high-triggering end of chip and discharge end are also through the 3rd capacity earth, the output of chip is through the coil ground connection of the second diode and relay, the two ends of relay coil are parallel with the 3rd diode, described Executive Module is the normally-closed contact of relay, and the first normally-closed contact of relay is arranged between the first inductance and load, and the second normally-closed contact of relay is arranged between the second inductance and load.
2. a kind of earth leakage protective device as claimed in claim 1, is characterized in that: described chip adopts NE555 chip.
3. a kind of earth leakage protective device as claimed in claim 2, is characterized in that: described second diode is light-emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520849479.6U CN205195233U (en) | 2015-10-30 | 2015-10-30 | Power leakage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520849479.6U CN205195233U (en) | 2015-10-30 | 2015-10-30 | Power leakage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205195233U true CN205195233U (en) | 2016-04-27 |
Family
ID=55788189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520849479.6U Expired - Fee Related CN205195233U (en) | 2015-10-30 | 2015-10-30 | Power leakage protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205195233U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436391A (en) * | 2017-08-11 | 2017-12-05 | 国网黑龙江省电力有限公司牡丹江供电公司 | Ground fault detection device |
| CN117856161A (en) * | 2024-01-31 | 2024-04-09 | 东莞市倍祺电子科技有限公司 | Leakage protection circuit of LED lamp |
-
2015
- 2015-10-30 CN CN201520849479.6U patent/CN205195233U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436391A (en) * | 2017-08-11 | 2017-12-05 | 国网黑龙江省电力有限公司牡丹江供电公司 | Ground fault detection device |
| CN117856161A (en) * | 2024-01-31 | 2024-04-09 | 东莞市倍祺电子科技有限公司 | Leakage protection circuit of LED lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160427 Termination date: 20191030 |