CN107749544B - Low-power consumption leakage protection plug - Google Patents
Low-power consumption leakage protection plug Download PDFInfo
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- CN107749544B CN107749544B CN201710882604.7A CN201710882604A CN107749544B CN 107749544 B CN107749544 B CN 107749544B CN 201710882604 A CN201710882604 A CN 201710882604A CN 107749544 B CN107749544 B CN 107749544B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
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Abstract
The utility model provides a low-power consumption earth leakage protection plug, includes zero sequence current transformer, electromagnetism dropout and locking device, and the device is equipped with rectifier circuit, 1 st silicon controlled rectifier, amplifier circuit, the 1 st resistance in solenoid and the drive circuit thereof, still is equipped with power consumption control circuit, power consumption control circuit and 1 st resistance parallel connection be in rectifier circuit output positive terminal with amplifier circuit's power end between. The low-power consumption leakage protection plug is low in power consumption when the normal mains voltage is used, and can still work continuously under the low-power consumption condition when the mains voltage drops to be very low, so that the leakage protection requirement of a user in a power supply environment with a wide voltage range is better met.
Description
Technical Field
The utility model relates to the technical field of electricity safety protection, in particular to a low-power consumption leakage protection plug.
Background
Along with the improvement of the living standard of people in the world, the awareness and the requirement of people on energy conservation and low carbon are also increasing. In the existing leakage protection plug, a step-down current-limiting resistor is generally arranged between a power end of an amplifying circuit and an output end of a rectifying circuit, so that an alternating current 220V power supply obtained from mains supply by a control circuit of the leakage protection plug outputs a direct current voltage after being rectified by the rectifying circuit, and provides a low-voltage direct current working power supply for the amplifying circuit after step-down and current-limiting are carried out through the step-down current-limiting resistor. While still having to continue to operate and provide leakage protection when the supply voltage drops to a lower voltage (e.g., 50V) as required by the relevant national standards. Therefore, the current limiting resistor for providing the working power supply for the amplifying circuit usually has a smaller resistance value to ensure that the leakage protection plug can still work normally when the power supply voltage drops to a lower voltage (for example, 50V), but the problem that the whole power consumption of the leakage protection plug is large due to the large power consumption caused by the small consumption of the current limiting resistor when 220V is used is caused. If the current limiting resistor is selected to have a larger resistance value, although the power consumption of the leakage protection plug is smaller at 220V, the leakage protection plug cannot provide necessary working voltage and current for the amplifying circuit when the power supply voltage drops to a lower voltage, and as a result, the leakage protection plug cannot continue to provide safety protection in a lower power supply voltage environment.
Disclosure of Invention
The utility model aims to provide a low-power-consumption leakage protection plug which not only has low power consumption when being used at normal mains supply voltage, but also can still work under the condition of low power consumption when the mains supply voltage drops to be very low (such as 50V), thereby better meeting the leakage protection requirements of users in a power supply environment with a wide voltage range.
The technical proposal of the utility model is as follows: the utility model provides a low-power consumption leakage protection plug, including shell, phase pole copper bolt, zero pole copper bolt, phase line, zero line, the zero sequence current transformer that phase line and zero line all passed, test loop and electromagnetism dropout and locking device, this electromagnetism dropout and locking device contains solenoid and drive circuit, phase line contact, zero line contact, solenoid's drive circuit mainly comprises rectifier circuit, 1 st silicon controlled rectifier, amplifier circuit, 1 st resistance, the secondary winding output of zero sequence current transformer with amplifier circuit's input is connected, 1 st resistance one end with rectifier circuit output positive pole end is connected, 1 st resistance other end with amplifier circuit's power end is connected, still be equipped with power consumption control circuit with 1 st resistance parallel connection is in between rectifier circuit output positive pole end and amplifier circuit's the power end, power consumption control circuit is last to be equipped with 2 nd resistance, 3 rd resistance, 4 th resistance, 5 th resistance, 6 th resistance, triode, 2 nd silicon controlled rectifier; the power supply is characterized in that one end of the resistor 2 and one end of the resistor 3 are connected and then connected with one end of the resistor 1 and the output positive end of the rectifying circuit, the other end of the resistor 2 is connected with the anode end of the silicon controlled rectifier 2, the other end of the resistor 3 is connected with one end of the resistor 4 and one end of the resistor 6, the other end of the resistor 4 is connected with one end of the resistor 5 and the base end of the triode, the other end of the resistor 6 is connected with the collector electrode end of the triode and the control end of the silicon controlled rectifier 2, and the other end of the resistor 5, the emitter end of the triode, the cathode end of the silicon controlled rectifier 2 and the other end of the resistor 1 are connected with the power supply end of the amplifying circuit.
Compared with the prior art, the utility model has the following remarkable effects:
(1) The low-power consumption leakage protection plug is provided with the power consumption control circuit, so that the power consumption of the low-power consumption leakage protection plug is very low when the normal mains supply voltage is 220V, and is about 1/4 of the power consumption of the existing leakage protection plug, namely the power consumption of the low-power consumption leakage protection plug when the power supply voltage is 220V is equivalent to the power consumption of the existing leakage protection plug when the power supply voltage is 50V, and meanwhile, the low-power consumption leakage protection plug can still work normally when the mains supply voltage is reduced from the normal 220V to 50V; the electric leakage protection requirement of a user in a power supply environment with the large voltage range of 220V-50V is met, and the electricity utilization safety of people is ensured.
(2) When the mains supply voltage is higher in a range of 220V-50V, the base end of the triode 10-7 obtains a high-level signal to be conducted and the 2 nd controllable silicon 10-1 is cut off, so that the 1 st resistor 9 with a high resistance value is mainly used for supplying power to the amplifying circuit 7, when the mains supply voltage is lower, the base end of the triode 10-7 obtains a low-level signal to be cut off and the 2 nd controllable silicon 10-1 is conducted, and the 1 st resistor 9 and the 2 nd resistor 10-2 are mainly connected in parallel and then are supplied to the amplifying circuit 7, namely, when the mains supply voltage is higher, the amplifying circuit 7 is supplied with power through a high-resistance resistor circuit, and when the mains supply voltage is lower, the amplifying circuit 7 is supplied with power through a lower-resistance resistor circuit, and the conversion process is controlled automatically without manual adjustment or conversion, so that the power supply safety guarantee can be better obtained under a wide-range voltage environment.
(3) The low-power consumption leakage protection plug has the advantages that the power consumption control circuit is arranged, so that the electric power consumption is very low when 220V mains voltage is used, the internal heat radiation amount of a product is small, the temperature is low, the problem that the internal environment temperature of the existing leakage protection plug is too high to cause the failure of electric parts due to the fact that the existing leakage protection plug is large in electric power consumption and high in heat radiation amount is solved, the size of the leakage protection plug is small, the internal structure is compact, the space is small and the sealing is difficult to dissipate heat is solved, the service life and the reliability of electric elements are greatly improved, and the leakage protection plug is safer and more reliable than the existing leakage protection plug. The leakage protection plug also has the advantages of energy conservation, high working reliability, long working life and the like.
The low-power consumption leakage protection plug is mainly applied to the leakage protection of various household appliances and is mainly made into a leakage protection plug or a power line with the leakage protection plug.
Drawings
Fig. 1 is an electrical schematic diagram of a low-power leakage protection plug according to an embodiment of the present utility model.
Detailed Description
The utility model is further illustrated by the following examples.
Example 1
Referring to FIG. 1, a low-power consumption leakage protection plug comprises a shell, a phase copper bolt 1, a zero copper bolt 2, a phase line 11, a zero line 12, a zero sequence current transformer 6, a test loop 8 and an electromagnetic tripping and locking device, wherein the phase line 11 and the zero line 12 pass through the zero sequence current transformer 6, the electromagnetic tripping and locking device comprises an electromagnetic coil 3 and a driving circuit thereof, a phase line fixed contact 1-1, a phase line moving contact 1-2, a zero line fixed contact 2-1 and a zero line moving contact 2-2, the driving circuit of the electromagnetic coil 3 mainly comprises a rectifying circuit 4, a 1 st silicon controlled rectifier 5, an amplifying circuit 7 and a 1 st resistor 9, the output end of a secondary winding of the zero sequence current transformer 6 is connected with the input end of the amplifying circuit 7, one end of the 1 st resistor 9 is connected with the output positive end of the rectifying circuit 4, the other end of the 1 st resistor 9 is connected with the power end 7-2 of the amplifying circuit 7, a power consumption control circuit 10 is further arranged, the power consumption control circuit 10 is connected with the 1 st resistor 9 in parallel between the output positive end of the rectifying circuit 4 and the power end 7-2 of the amplifying circuit 7, the power consumption control circuit 10 is provided with a 2 nd resistor 10-2, a 3 rd resistor 10-3, a 4 th resistor 10-4, a 5 th resistor 10-5, a 6 th resistor 10-6, a triode 10-7 and a 2 nd controllable silicon 10-1, one end of the 2 nd resistor 10-2 and one end of the 3 rd resistor 10-3 are connected and then connected with one end of the 1 st resistor 9 and the output positive end of the rectifying circuit 4, the other end of the 2 nd resistor 10-2 is connected with the anode end of the 2 nd controllable silicon 10-1, the other end of the 3 rd resistor 10-3 is connected with one end of the 4 th resistor 10-4 and one end of the 6 th resistor 10-6, the other end of the 4 th resistor 10-4 is connected with one end of the 5 th resistor 10-5 and the base electrode end of the triode 10-7, the other end of the 6 th resistor 10-6 is connected with the collector electrode end of the triode 10-7 and the control terminal of the 2 nd silicon controlled rectifier 10-1, the other end of the 5 th resistor 10-5 and the triode 10-7
The emitter terminal, the cathode terminal of the 2 nd thyristor 10-1, and the other end of the 1 st resistor 9 are connected with the power supply terminal 7-2 of the amplifying circuit 7.
When the power supply works, the power supply voltage input from the phase line 11 and the zero line 12 is rectified by the rectifying circuit 4 and then output a direct current power supply, the power supply is used for providing a working power supply for the amplifying circuit 7 through the 1 st resistor 9, and a branch circuit formed by sequentially connecting the 3 rd resistor 10-3, the 4 th resistor 10-4 and the 5 th resistor 10-5 in series provides a sampling voltage signal and the working power supply for the triode 10-7. When the leakage protection plug is used at the normal mains supply voltage 220V, the 220V power supply voltage is rectified by the rectification circuit 4 and then is output to a direct current power supply, and after the voltage division and current limitation are carried out by the 3 rd resistor 10-3, the 4 th resistor 10-4 and the 5 th resistor 10-5, the base end of the triode 10-7 obtains a high-level signal to enable the triode 10-7 to be conducted, the collector of the triode 10-7 becomes low level, the control terminal of the 2 nd controllable silicon 10-1 is locked at the low level state, the 2 nd controllable silicon 10-1 is in the cut-off state, and therefore the 1 st resistor 9 mainly provides a working power supply for the amplifying circuit 7, and the current flowing into the power end 7-2 of the amplifying circuit 7 is small due to the fact that the resistance value of the 1 st resistor 9 is selected to be large, the whole leakage protection plug is low in power consumption and can work normally. When the mains supply voltage fails and the voltage is lower (for example, the mains supply voltage is reduced to 50V), the 50V power supply voltage is rectified by the rectifying circuit 4 and then is output to a direct current power supply, and after the voltage division and current limiting are carried out by the 3 rd resistor 10-3, the 4 th resistor 10-4 and the 5 th resistor 10-5, the base end of the triode 10-7 obtains a low-level signal to cut off the triode 10-7, the collector of the triode 10-7 becomes high level, the control terminal of the 2 nd silicon controlled rectifier 10-1 becomes high level, the 2 nd silicon controlled rectifier 10-1 becomes in a conducting state, and thus the power supply is converted into a working power supply mainly by the 2 nd resistor 10-2 and the 1 st resistor 9 which are connected in parallel, and the working power supply required by the amplifying circuit 7 can still be met and the power consumption is low because the resistance value of the 2 nd resistor 10-2 and the 1 st resistor 9 becomes smaller after being connected in parallel, and the drain protection plug can work normally, so that the electric leakage protection requirements of various different environments can be met better, and the safety of people can use electricity.
According to the utility model, a copper plug of the grounding electrode and a ground wire connected with the copper plug can be additionally arranged according to the needs of users.
When the leakage protection plug is used, a reset button of the leakage protection plug is pressed, a phase line moving contact 1-2 and a phase line fixed contact 1-1 of the leakage protection plug are closed and communicated, a zero line moving contact 2-2 and a zero line fixed contact 2-1 are also closed and communicated at the same time, the leakage protection plug is powered on normally at the lower end, when leakage occurs, a zero sequence current transformer 6 detects a leakage signal and transmits the leakage signal to an amplifying circuit 7, and when the leakage signal reaches a preset threshold value, the amplifying circuit 7 triggers a 1 st silicon controlled rectifier 5 to conduct and drive an electromagnetic coil 3 to be powered on so as to trip the leakage protection plug.
Claims (1)
1. The utility model provides a low-power consumption earth leakage protection plug, includes shell, looks utmost point copper bolt, zero utmost point copper bolt, phase line, zero line, phase line and zero line all pass zero sequence current transformer, test loop and electromagnetism dropout and locking device, this electromagnetism dropout and locking device contain solenoid and drive circuit, phase line contact, zero line contact thereof, solenoid's drive circuit mainly comprises rectifier circuit, 1 st silicon controlled rectifier, amplifier circuit, 1 st resistance, zero sequence current transformer's secondary winding output with amplifier circuit's input is connected, 1 st resistance one end with rectifier circuit output positive terminal is connected, 1 st resistance other end with amplifier circuit's power end is connected, its characterized in that: the power consumption control circuit is connected in parallel with the 1 st resistor and is arranged between the output positive terminal of the rectifying circuit and the power supply terminal of the amplifying circuit, and the power consumption control circuit is provided with a 2 nd resistor, a 3 rd resistor, a 4 th resistor, a 5 th resistor, a 6 th resistor, a triode and a 2 nd controllable silicon; the power supply circuit is characterized in that one end of the resistor 2 and one end of the resistor 3 are connected and then connected with one end of the resistor 1 and the positive end of the output end of the rectifying circuit, the other end of the resistor 2 is connected with the anode end of the silicon controlled rectifier 2, the other end of the resistor 3 is connected with one end of the resistor 4 and one end of the resistor 6, the other end of the resistor 4 is connected with one end of the resistor 5 and the base end of the triode, the other end of the resistor 6 is connected with the collector electrode end of the triode and the control end of the silicon controlled rectifier 2, and the other end of the resistor 5, the emitter end of the triode, the cathode end of the silicon controlled rectifier 2 and the other end of the resistor 1 are connected with the power supply end of the amplifying circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710882604.7A CN107749544B (en) | 2017-09-26 | 2017-09-26 | Low-power consumption leakage protection plug |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710882604.7A CN107749544B (en) | 2017-09-26 | 2017-09-26 | Low-power consumption leakage protection plug |
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| Publication Number | Publication Date |
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| CN107749544A CN107749544A (en) | 2018-03-02 |
| CN107749544B true CN107749544B (en) | 2023-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710882604.7A Active CN107749544B (en) | 2017-09-26 | 2017-09-26 | Low-power consumption leakage protection plug |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10284184A (en) * | 1997-03-31 | 1998-10-23 | Tempearl Ind Co Ltd | Leakage protection plug |
| CN102290689A (en) * | 2011-06-23 | 2011-12-21 | 刘睿刚 | Earth leakage protection plug |
| CN203722205U (en) * | 2014-02-20 | 2014-07-16 | 厦门振泰成科技有限公司 | Overvoltage and electric leakage protection circuit |
| CN207338820U (en) * | 2017-09-26 | 2018-05-08 | 深圳市良辉科技有限公司 | A kind of low-power consumption leakage protecting plug |
-
2017
- 2017-09-26 CN CN201710882604.7A patent/CN107749544B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10284184A (en) * | 1997-03-31 | 1998-10-23 | Tempearl Ind Co Ltd | Leakage protection plug |
| CN102290689A (en) * | 2011-06-23 | 2011-12-21 | 刘睿刚 | Earth leakage protection plug |
| CN203722205U (en) * | 2014-02-20 | 2014-07-16 | 厦门振泰成科技有限公司 | Overvoltage and electric leakage protection circuit |
| CN207338820U (en) * | 2017-09-26 | 2018-05-08 | 深圳市良辉科技有限公司 | A kind of low-power consumption leakage protecting plug |
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|---|---|
| CN107749544A (en) | 2018-03-02 |
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Effective date of registration: 20230508 Address after: 528305 Floor 4, No. 9, South Industrial Community, the west side of Tianhe North Road, South Neighborhood Committee, Ronggui District, Shunde District, Foshan City, Guangdong Province Applicant after: Foshan Lianghui Electronics Co.,Ltd. Address before: 518126 room 705b, block B, Shenzhen Zhihui innovation center, Taoyuanju, Qianjin Second Road, Xixiang street, Bao'an District, Shenzhen, Guangdong Applicant before: SHENZHEN LONGWAY TECHNOLOGY Co.,Ltd. |
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