CN206412751U - The control circuit of earth leakage protective device with overvoltage protection - Google Patents
The control circuit of earth leakage protective device with overvoltage protection Download PDFInfo
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- CN206412751U CN206412751U CN201720063535.2U CN201720063535U CN206412751U CN 206412751 U CN206412751 U CN 206412751U CN 201720063535 U CN201720063535 U CN 201720063535U CN 206412751 U CN206412751 U CN 206412751U
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- divider resistance
- controllable silicon
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Abstract
The utility model discloses a kind of control circuit of the earth leakage protective device with overvoltage protection, including current transformer, control chip, switching diode D2, controllable silicon Q1, tripping coil, divider resistance R9, divider resistance R10 and switching diode D4, current transformer is arranged on fire, zero line output end, the output end of its secondary coil and an input of control chip are connected, one output end of control chip is connected by switching diode D2 with controllable silicon Q1 control pole, controllable silicon Q1 anode is connected by commutation diode D1 with tripping coil, the negative pole end connection of its negative electrode and control chip, tripping coil joins with de- mouth mechanism, divider resistance R9 and divider resistance R10 series connection is followed by between controllable silicon Q1 anode and zero line.The control circuit collection electric leakage automatic detection of earth leakage protective device of the present utility model with overvoltage protection, overheating detection, overvoltage are detected on one, can fast and effeciently detect electricity consumption hidden danger, it is ensured that Electrical Safety.
Description
Technical field
The utility model is related to a kind of control circuit of the earth leakage protective device with overvoltage protection, belongs to earth leakage protective device control
Technical field.
Background technology
The safety switch that earth leakage protective device is used as electrical equipment, it plays most important effect to Electrical Safety.It is existing
Most of earth leakage protective device can actively cut off the electricity supply when detecting electric leakage, play safeguard protection effect.But during overtension
Power supply can not be automatically cut off, the protective effect of earth leakage protective device is under some influence, and electrical equipment is there is potential safety hazard when using.
Utility model content
There is provided a kind of earth leakage protective device with overvoltage protection in order to overcome the shortcomings of prior art presence for the utility model
Control circuit.
The utility model can be by taking following technical scheme to be achieved：
The control circuit of earth leakage protective device with overvoltage protection, including current transformer, control chip, switching diode
D2, controllable silicon Q1, tripping coil, divider resistance R9, divider resistance R10 and switching diode D4, current transformer be arranged on fire,
Zero line output end, the output end of its secondary coil and an input of control chip are connected, and an output end of control chip passes through
Switching diode D2 is connected with controllable silicon Q1 control pole, and controllable silicon Q1 anode is connected by commutation diode D1 and tripping coil
Connect, the voltage negative pole end connection of its negative electrode and control chip, tripping coil joins with de- mouth mechanism, divider resistance R9 and divider resistance
It is connected to after R10 series connection between controllable silicon Q1 anode and zero line, switching diode D4 positive pole is connected on divider resistance R9 and divided
Piezoresistance R10 junction, its negative pole is connected with controllable silicon Q1 control pole.
Preferably, the control circuit of the earth leakage protective device with overvoltage protection also includes temperature-sensitive detection module and switch
Diode D3, temperature-sensitive detection module is connected by switching diode D3 with controllable silicon Q1 control pole.
Preferably, the temperature-sensitive detection module includes thermistor RT, divider resistance R2 and divider resistance R3, temperature-sensitive
Filter capacitor C6 two ends, switching diode D3 positive pole are connected to after resistance RT and divider resistance R2, divider resistance R3 series connection
At the tie point for being connected on thermistor RT and divider resistance R3, its negative pole is connected with controllable silicon Q1 control pole.
Preferably, the thermistor RT uses negative tempperature coefficient thermistor.
Compared with prior art, the beneficial effects of the utility model are：The utility model is by divider resistance R9 and partial pressure
Spelled after resistance R10 series connection between controllable silicon Q1 anode and zero line, utilize the company for being connected on divider resistance R9 and divider resistance R10
The switching diode D4 at the place of connecing turns on controllable silicon, tripping coil energization job control tripping mechanism is cut off the electricity supply, to electricity
Source overtension plays safeguard protection effect；Meanwhile, detect the temperature in use of earth leakage protective device using temperature-sensitive detection module and lead to
Crossing switching diode D3 turns on controllable silicon, tripping coil energization job control tripping mechanism is cut off the electricity supply, to loading
Big or environment temperature is too high or plug with female contact is bad plays safeguard protection effect, ambient temperature can be effectively prevented from too high
Or the potential safety hazard that Plug contact is bad or load appliance power is excessive.Earth leakage protective device of the present utility model with overvoltage protection
Control circuit collection electric leakage automatic detection, overheating detection, overvoltage be detected on one, can fast and effeciently detect electricity consumption hidden danger, protect
Demonstrate,prove Electrical Safety.
Brief description of the drawings
Fig. 1 is the circuit diagram of the control circuit of the earth leakage protective device of the present utility model with overvoltage protection.
Embodiment
Embodiment of the present utility model is described in detail below in conjunction with accompanying drawing.
As shown in figure 1, a kind of control circuit of the earth leakage protective device with overvoltage protection includes current transformer L1, control core
Piece M54123, switching diode D2, controllable silicon Q1, tripping coil, divider resistance R9, divider resistance R10, switching diode D4,
Temperature-sensitive detection module and switching diode D3, current transformer L1 are arranged on fire, zero line output end, the output end of its secondary coil
Be connected with a control chip M54123 input, a control chip M54123 output end by switching diode D2 with can
Silicon Q1 control pole connection is controlled, controllable silicon Q1 anode is connected by commutation diode with tripping coil K, its negative electrode and control
Chip M54123 voltage negative pole end connection, tripping coil K links with de- mouth mechanism, divider resistance R9 and divider resistance R10
It is connected to after series connection between controllable silicon Q1 anode and zero line, switching diode D4 positive pole is connected on divider resistance R9 and partial pressure electricity
R10 junction is hindered, its negative pole is connected with controllable silicon Q1 control pole, temperature-sensitive detection module passes through switching diode D3 and can
Control silicon Q1 control pole connection.Wherein, temperature-sensitive detection module includes thermistor RT, divider resistance R2 and divider resistance R3, heat
Filter capacitor C6 two ends are connected to after quick resistance RT and divider resistance R2, divider resistance R3 series connection, switching diode D3 is just
Pole is connected at thermistor RT and divider resistance R3 tie point, and its negative pole is connected with controllable silicon Q1 control pole.The temperature-sensitive
Resistance RT uses negative tempperature coefficient thermistor.
The operation principle of the control circuit of earth leakage protective device of the present utility model with overvoltage protection is as follows：Work as earth leakage protective
When leaking electricity occurs in the electrical appliance of device protection or the person gets an electric shock, zero sequence current mutual inductor L1 detects electric leakage signal voltage and electric leakage
Signal voltage is sent to control chip M54123, knows after control chip M54123 processing, amplification, then through switching diode D2
Do not give controllable silicon Q1 control pole afterwards, trigger controlled silicon conducting, make tripping coil K energization work, so that de- mouth mechanism action,
Separate dynamic and static contact, deenergization.When supply voltage is too high, the rise of voltage that resistance R10 shares so that resistance R9 with
Resistance R10, switching diode D4 tie point current potential rise, switching diode D4 conductings trigger controlled silicon conducting, make dropout
Coil K energization work, so that de- mouth mechanism action, separates dynamic and static contact, deenergization；When ambient temperature is too high or plug
Loose contact or load appliance power are excessive and cause earth leakage protective device temperature too high, reduce thermistor RT resistance, point
The voltage of load reduces, so that resistance R3 and RT tie point current potential rise, switching diode D3 conductings, triggering controllable silicon are led
It is logical, make tripping coil K energization work, so that de- mouth mechanism action, separates dynamic and static contact, deenergization.
The utility model is described above in association with preferred embodiment, but the utility model is not limited to the above and taken off
The embodiment shown, and the various modifications carried out according to essence of the present utility model, equivalent combinations should be covered.
Claims (4)
1. the control circuit of the earth leakage protective device with overvoltage protection, it is characterised in that including current transformer, control chip, switch
Diode D2, controllable silicon Q1, tripping coil, divider resistance R9, divider resistance R10 and switching diode D4, current transformer are set
Put at fire, zero line output end, the output end of its secondary coil and an input of control chip are connected, an output of control chip
End is connected by switching diode D2 with controllable silicon Q1 control pole, and controllable silicon Q1 anode passes through commutation diode D1 and dropout
Coil is connected, and the voltage negative pole end of its negative electrode and control chip is connected, and tripping coil joins with de- mouth mechanism, divider resistance R9 and point
It is connected to after piezoresistance R10 series connection between controllable silicon Q1 anode and zero line, switching diode D4 positive pole is connected on divider resistance
R9 and divider resistance R10 junction, its negative pole are connected with controllable silicon Q1 control pole.
2. the control circuit of the earth leakage protective device according to claim 1 with overvoltage protection, it is characterised in that also including heat
Quick detection module and switching diode D3, temperature-sensitive detection module is connected by switching diode D3 with controllable silicon Q1 control pole.
3. the control circuit of the earth leakage protective device according to claim 2 with overvoltage protection, it is characterised in that the temperature-sensitive
Detection module includes thermistor RT, divider resistance R2 and divider resistance R3, thermistor RT and divider resistance R2, divider resistance
Filter capacitor C6 two ends are connected to after R3 series connection, switching diode D3 positive pole is connected on thermistor RT's and divider resistance R3
At tie point, its negative pole is connected with controllable silicon Q1 control pole.
4. the control circuit of the earth leakage protective device according to claim 3 with overvoltage protection, it is characterised in that described heat
Quick resistance RT uses negative tempperature coefficient thermistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720063535.2U CN206412751U (en) | 2017-01-19 | 2017-01-19 | The control circuit of earth leakage protective device with overvoltage protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720063535.2U CN206412751U (en) | 2017-01-19 | 2017-01-19 | The control circuit of earth leakage protective device with overvoltage protection |
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| Publication Number | Publication Date |
|---|---|
| CN206412751U true CN206412751U (en) | 2017-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720063535.2U Active CN206412751U (en) | 2017-01-19 | 2017-01-19 | The control circuit of earth leakage protective device with overvoltage protection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110993440A (en) * | 2019-05-20 | 2020-04-10 | 浙江诚富电器科技有限公司 | Take self-checking actuation control circuit |
-
2017
- 2017-01-19 CN CN201720063535.2U patent/CN206412751U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110993440A (en) * | 2019-05-20 | 2020-04-10 | 浙江诚富电器科技有限公司 | Take self-checking actuation control circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201103 Address after: Second floor, No.10 Xinfu Road, Xiaoli community, Dongfeng Town, Zhongshan City, Guangdong Province Patentee after: Zhongshan grace Electronic Co., Ltd Address before: 528400 Guangdong city of Zhongshan Province Dongfeng Town Lek Village new Fu Road No. 10 Patentee before: ZHONGSHAN GRACE ELECTRIC Co.,Ltd. |
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| TR01 | Transfer of patent right |