CN207459701U - A kind of adjustable leakage circuit breaker control circuit of residual operating current - Google Patents
A kind of adjustable leakage circuit breaker control circuit of residual operating current Download PDFInfo
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- CN207459701U CN207459701U CN201721145491.4U CN201721145491U CN207459701U CN 207459701 U CN207459701 U CN 207459701U CN 201721145491 U CN201721145491 U CN 201721145491U CN 207459701 U CN207459701 U CN 207459701U
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- residual operating
- differential amplifier
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Abstract
The utility model discloses a kind of adjustable leakage circuit breaker control circuits of residual operating current, include：Trip circuit, the trip circuit include the tripping coil that is connected in series with each other forming circuit and silicon-controlled；It is arranged to detect the zero sequence current mutual inductor of circuit leakage condition；Differential amplifier, one end of differential amplifier is connected to the secondary coil of zero sequence current mutual inductor, for receiving residual operating current；The output terminal of differential amplifier is connected with silicon-controlled control pole；Further include the residual operating current conditioned circuit being connected between zero sequence current mutual inductor secondary coil and differential amplifier, the residual operating current conditioned circuit includes multistage toggle switch, resistance is respectively connected on each corresponding pin of multistage toggle switch, and the resistance value of the resistance on corresponding multistage toggle switch difference pin differs setting.Reasonable in design, residual operating current is adjustable.
Description
Technical field
The utility model is related to a kind of leakage circuit breakers, in particular to a kind of adjustable leakage circuit breakers controls of leakage current
Circuit.
Background technology
Leakage circuit breakers be when leakage current is more than predetermined value in circuit can automatic trip so as to playing earth leakage protective open
It closes.The structure of existing leakage circuit breakers is mainly combined by breaker and leakage tripping device and linked.Wherein leakage circuit breakers
Control circuit be leakage tripping device core devices.
In the prior art, the residual operating current of traditional 36mm Minitype electrical leakage breakers is all to fix a current value,
User can not set residual operating current value according to actual needs, it is therefore necessary to be improved.
Utility model content
The purpose of this utility model is to overcome shortcoming and defect existing in the prior art, and provide a kind of structure design
Rationally, the adjustable leakage circuit breaker control circuit of residual operating current.
To achieve the above object, the technical solution of the utility model is to include：
Trip circuit, the trip circuit include the tripping coil that is connected in series with each other forming circuit and silicon-controlled；
It is arranged to detect the zero sequence current mutual inductor of circuit leakage condition；
Differential amplifier, one end of differential amplifier are connected to the secondary coil of zero sequence current mutual inductor, are leaked for receiving
Electric action current；The output terminal of differential amplifier is connected with silicon-controlled control pole；
Further including the residual operating current being connected between zero sequence current mutual inductor secondary coil and differential amplifier can
Circuit is adjusted, which includes multistage toggle switch, on each corresponding pin of multistage toggle switch
Resistance is respectively connected with, and the resistance value of the resistance on corresponding multistage toggle switch difference pin differs setting.
It is the multistage toggle switch for three sections of waved switch K1 further to set, three of three sections of waved switch K1
The different resistance R3 of resistance value, resistance R4 and resistance R5 are connected on pin respectively.
Further set is gone back between the secondary coil of the zero sequence current mutual inductor and the input terminal of differential amplifier
It is provided with the filtering balancing circuitry being made of resistance R2, capacitance C1, capacitance C2 and capacitance C5.
It is that the full bridge rectifier being made of diode D1-D4 is provided on the trip circuit further to set, should
The varistor MYG for overvoltage protection is provided between trip circuit and external firewire L, zero curve N.
Further set is to further include the test switch K2 that leakage tests circuit is connected between firewire L, zero curve N.
Further set has been arranged in parallel by resistance R1 and capacitance C2 groups between the silicon-controlled anode and cathode
Into regulator circuit.
The operation principle and advantage of the utility model be：
Zero sequence current mutual inductor detects circuit conditions and residual operating current signal, which is acted by electric leakage
The resistance of the different resistance values of current adjustment circuit is adjusted, so as to change the initial electric leakage for being input to differential amplifier input terminal
Action current value, and due to the magnification ratio of differential amplifier be it is specific, inputed to from the output terminal of differential amplifier
The residual operating current value of SCR control pole can be adjusted according to the different resistance of residual operating current conditioned circuit
Section, so as to which user be facilitated to set residual operating current value according to actual needs.
The utility model is described further with reference to specification drawings and specific embodiments.
Description of the drawings
Fig. 1 specific embodiment of the present invention schematic diagrams；
Fig. 2 specific embodiment of the present invention circuit diagrams.
Specific embodiment
The utility model is specifically described below by embodiment, is served only for carrying out the utility model further
Explanation, it is impossible to be interpreted as the restriction to scope of protection of the utility model.
Specific embodiment of the present utility model as shown in Figs. 1-2 includes trip circuit 1, which includes
There is the tripping coil L1 for being connected in series with each other forming circuit and silicon-controlled SRV；The anode of the present embodiment silicon-controlled SRV
It is arranged in parallel between cathode by the regulator circuit being made of resistance R1 and capacitance C2.In addition, it is set on the trip circuit
By the full bridge rectifier being made of diode D1-D4, it is provided with and is used between the trip circuit and external firewire L, zero curve N
The varistor MYG of overvoltage protection.
It is mutual that the present embodiment further includes the zero-sequence current for being arranged to detect circuit (firewire L and zero curve N) leakage condition
Sensor 2；Zero sequence current mutual inductor is the conventional fitment of this field, can be directly from market purchasing.Differential amplifier 3 has been further included,
One end of differential amplifier is connected to the secondary coil of zero sequence current mutual inductor, for receiving residual operating current；Differential amplification
The output terminal of device is connected with silicon-controlled control pole；The present embodiment differential amplifier is using the integrated of model VG54123
IC is completed, which integrates IC can be from market purchasing, the function of interior integrated differential amplifier and regulator circuit.
It is connected in addition, the present embodiment further includes between 2 secondary coil of zero sequence current mutual inductor and differential amplifier
Residual operating current conditioned circuit 4, the residual operating current conditioned circuit include three sections of waved switch K1, this three sections fluctuations are opened
It closes and connects the different resistance R3 of resistance value, resistance R4 and resistance R5 respectively on three pins of K1.The zero sequence current mutual inductor
Secondary coil and differential amplifier 3 input terminal between be additionally provided with and be made of resistance R2, capacitance C1, capacitance C2 and capacitance C5
Filtering balancing circuitry.
In addition, the present embodiment has further included leakage tests circuit, the leakage tests circuit by be connected to firewire L, zero curve N it
Between test switch K2 and test resistance form.
Claims (6)
1. a kind of adjustable leakage circuit breaker control circuit of residual operating current, it is characterised in that include：
Trip circuit, the trip circuit include the tripping coil that is connected in series with each other forming circuit and silicon-controlled；
It is arranged to detect the zero sequence current mutual inductor of circuit leakage condition；
Differential amplifier, one end of differential amplifier are connected to the secondary coil of zero sequence current mutual inductor, dynamic for receiving electric leakage
Make electric current；The output terminal of differential amplifier is connected with silicon-controlled control pole；
Further include the residual operating current adjustable electric being connected between zero sequence current mutual inductor secondary coil and differential amplifier
Road, the residual operating current conditioned circuit include multistage toggle switch, connect on each corresponding pin of multistage toggle switch
Resistance is connected to, and the resistance value of the resistance on corresponding multistage toggle switch difference pin differs setting.
2. a kind of adjustable leakage circuit breaker control circuit of residual operating current according to claim 1, it is characterised in that:
The multistage toggle switch is three sections of waved switch K1, and resistance value is connected respectively not on three pins of three sections of waved switch K1
Same resistance R3, resistance R4 and resistance R5.
3. a kind of adjustable leakage circuit breaker control circuit of residual operating current according to claim 1, it is characterised in that:
It is additionally provided between the secondary coil of the zero sequence current mutual inductor and the input terminal of differential amplifier by resistance R2, capacitance
The filtering balancing circuitry of C1, capacitance C2 and capacitance C5 compositions.
4. a kind of adjustable leakage circuit breaker control circuit of residual operating current according to claim 1, it is characterised in that:
The full bridge rectifier being made of diode D1-D4 is provided on the trip circuit, the trip circuit and external firewire
L, the varistor MYG for overvoltage protection is provided between zero curve N.
5. a kind of adjustable leakage circuit breaker control circuit of residual operating current according to claim 1, it is characterised in that:
Leakage tests circuit is further included, the leakage tests circuit is by the test switch K2 being connected between firewire L, zero curve N and test
Resistance is formed.
6. a kind of adjustable leakage circuit breaker control circuit of residual operating current according to claim 1, it is characterised in that:
It is arranged in parallel between the silicon-controlled anode and cathode by the regulator circuit being made of resistance R1 and capacitance C2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721145491.4U CN207459701U (en) | 2017-09-08 | 2017-09-08 | A kind of adjustable leakage circuit breaker control circuit of residual operating current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721145491.4U CN207459701U (en) | 2017-09-08 | 2017-09-08 | A kind of adjustable leakage circuit breaker control circuit of residual operating current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207459701U true CN207459701U (en) | 2018-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721145491.4U Active CN207459701U (en) | 2017-09-08 | 2017-09-08 | A kind of adjustable leakage circuit breaker control circuit of residual operating current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207459701U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020103554A1 (en) * | 2018-11-23 | 2020-05-28 | 深圳市晶扬电子有限公司 | Leakage detection integrated circuit chip, leakage detection protection circuit and electrical appliance |
| WO2023231578A1 (en) * | 2022-05-31 | 2023-12-07 | 国网信息通信产业集团有限公司 | Analog quantity acquisition method and device |
-
2017
- 2017-09-08 CN CN201721145491.4U patent/CN207459701U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020103554A1 (en) * | 2018-11-23 | 2020-05-28 | 深圳市晶扬电子有限公司 | Leakage detection integrated circuit chip, leakage detection protection circuit and electrical appliance |
| WO2023231578A1 (en) * | 2022-05-31 | 2023-12-07 | 国网信息通信产业集团有限公司 | Analog quantity acquisition method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Fang Douyan village, Liushi Town, Leqing City, Wenzhou City, Zhejiang Province Patentee after: ZHEJIANG JIUCE INTELLIGENT ELECTRIC Co.,Ltd. Patentee after: Zhang Feng Address before: 325000 Fangdouyan Village, Liushi Town, Yueqing City, Wenzhou City, Zhejiang Province Patentee before: WENZHOU JIUCE INTELLIGENT ELECTRIC Co.,Ltd. Patentee before: Zhang Feng |
|
| CP03 | Change of name, title or address |