CN206412750U - The control circuit of earth leakage protective device with open-phase protection - Google Patents
The control circuit of earth leakage protective device with open-phase protection Download PDFInfo
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- CN206412750U CN206412750U CN201720063534.8U CN201720063534U CN206412750U CN 206412750 U CN206412750 U CN 206412750U CN 201720063534 U CN201720063534 U CN 201720063534U CN 206412750 U CN206412750 U CN 206412750U
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- divider resistance
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- controllable silicon
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Abstract
The utility model discloses a kind of control circuit of the earth leakage protective device with open-phase protection, including current transformer, control chip, switching diode D2, controllable silicon Q1, commutation diode D1, 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 with tripping coil, the voltage negative pole end connection of its negative electrode and control chip, tripping coil joins with de- mouth mechanism, is connected to after divider resistance R9 and divider resistance R10 series connection on one end of tripping coil and output end zero line.The control circuit of earth leakage protective device of the present utility model with open-phase protection integrates electric leakage automatic detection, pile defection, overheating detection, fast and effeciently detects 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 open-phase 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 zero line is contacted not
During good or scarce zero line, 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 open-phase 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：
A kind of control circuit of the earth leakage protective device with open-phase protection, including current transformer, control chip, two poles of switch
Pipe D2, controllable silicon Q1, tripping coil, commutation diode D1, filter capacitor C7, divider resistance R9, divider resistance R10 and switch two
Pole pipe D4, current transformer is arranged on fire, the output end of zero line, the output end of its secondary coil and an input of control chip
Connection a, output end of control chip is connected by switching diode D2 with controllable silicon Q1 control pole, controllable silicon Q1 anode
It is connected with tripping coil, the voltage end negative pole connection of its negative electrode and control chip, tripping coil joins with de- mouth mechanism, filter capacitor
C7 positive pole is connected to commutation diode D1 negative pole, and its negative pole is connected on zero line, and divider resistance R9 one end is connected to whole
Diode D1 negative pole is flowed, its other end concatenation divider resistance R10 is followed by zero line, divider resistance R9 and divider resistance R10
Spelled after series connection between filter capacitor C7 positive pole and negative pole, switching diode D4 positive pole is connected on divider resistance R9 and partial pressure
Resistance R10 junction, its negative pole is connected with controllable silicon Q1 control pole.
Preferably, the control circuit of the earth leakage protective device with open-phase 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, divider resistance R3 and switch two
Pole pipe D3.After thermistor RT and divider resistance R2, divider resistance R3 series connection and at filter capacitor C6 two ends, switching diode
D3 positive pole is connected at thermistor RT and divider resistance R3 tie point, and 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：Filter capacitor C7 is connected to by the utility model
Between commutation diode D1 negative pole and zero line, divider resistance R9 concatenations divider resistance R10 is followed by the negative of commutation diode D1
Between pole and zero line, the switching diode D4 using the junction for being connected on divider resistance R9 and divider resistance R10 makes controllable silicon
Conducting, makes tripping coil energization job control tripping mechanism cut off the electricity supply, safe guarantor is played to the applied at elevated temperature of earth leakage protective device
Shield is acted on；Meanwhile, detect the temperature in use of earth leakage protective device using temperature-sensitive detection module and made by switching diode D3 controllable
Silicon conducting processed, makes tripping coil energization job control tripping mechanism cut off the electricity supply, peace is played to the applied at elevated temperature of earth leakage protective device
Full guard is acted on, and can be effectively prevented from the safety that ambient temperature is too high or Plug contact is bad or load appliance power is excessive hidden
Suffer from.The control circuit collection electric leakage automatic detection of earth leakage protective device of the present utility model with open-phase protection, pile defection, overheat inspection
Survey in one, can fast and effeciently detect electricity consumption hidden danger, it is ensured that 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 open-phase 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 open-phase protection includes current transformer L1, control core
Piece M54123, switching diode D2, controllable silicon Q1, tripping coil, commutation diode D1, filter capacitor C7, divider resistance R9, point
Piezoresistance R10, switching diode D4, temperature-sensitive detection module and switching diode D3, it is defeated that current transformer L1 is arranged on fire, zero line
Go out end, the output end of its secondary coil is connected with a control chip M54123 input, a control chip M54123 output
End is connected by switching diode D2 with controllable silicon Q1 control pole, and controllable silicon Q1 anode is connected with tripping coil K, its negative electrode
It is connected with control chip M54123 voltage end negative pole, tripping coil K links with de- mouth mechanism, filter capacitor C7 positive pole connection
To commutation diode D1 negative pole, its negative pole is connected on zero line, and divider resistance R9 one end is connected to commutation diode D1's
Negative pole, its other end concatenation divider resistance R10 is followed by zero line, is spelled after divider resistance R9 and divider resistance R10 series connection can
Between the anode and ground wire of controlling silicon Q1, switching diode D4 positive pole is connected on divider resistance R9 and divider resistance R10 junction,
Its negative pole is connected with controllable silicon Q1 control pole, the control pole that temperature-sensitive detection module passes through switching diode D3 and controllable silicon Q1
Connection.Wherein, temperature-sensitive detection module includes thermistor RT, divider resistance R2, divider resistance R3 and switching diode D3.Temperature-sensitive
After resistance RT and divider resistance R2, divider resistance R3 series connection and at filter capacitor C6 two ends, switching diode D3 positive pole connects
At thermistor RT and divider resistance R3 tie point, its negative pole is connected with controllable silicon Q1 control pole.The thermistor
RT uses the thermistor of negative temperature coefficient.
The operation principle of the control circuit of earth leakage protective device of the present utility model with open-phase 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
Controllable silicon Q1 control pole is not given afterwards, the Q1 conductings of triggering controllable silicon make tripping coil K energization work, so that de- mouth mechanism is moved
Make, separate dynamic and static contact, deenergization.When zero line loose contact or scarce zero line, divider resistance R9 and divider resistance R10's
The current potential rise of intersection point is connected, switching diode D4 conductings trigger controlled silicon conducting, make tripping coil K energization work, so that
Make de- mouth mechanism action, separate dynamic and static contact, deenergization.When ambient temperature is too high or Plug contact is bad or load appliance
Power is excessive and causes earth leakage protective device temperature too high, reduces thermistor RT resistance, and the voltage shared reduces, so that
Resistance R3 and RT tie point current potential rise, switching diode D3 conductings trigger controlled silicon conducting, make tripping coil K energization works
Make, 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. a kind of control circuit of the earth leakage protective device with open-phase protection, it is characterised in that including current transformer, control chip,
Switching diode D2, controllable silicon Q1, tripping coil, commutation diode D1, filter capacitor C7, divider resistance R9, divider resistance R10
With switching diode D4, current transformer is arranged on fire, the output end of zero line, the output end of its secondary coil and control chip
One input is connected, and an output end of control chip is connected by switching diode D2 with controllable silicon Q1 control pole, controllable silicon
The voltage end negative pole of one end connection of Q1 and tripping coil, its negative electrode and control chip is connected, and tripping coil joins with de- mouth mechanism,
Filter capacitor C7 positive pole is connected to commutation diode D1 negative pole, and its negative pole is connected on zero line, divider resistance R9 one end
Commutation diode D1 negative pole is connected to, its other end concatenation divider resistance R10 is followed by zero line, and switching diode D4 is just
Pole is connected on divider resistance R9 and divider resistance R10 junction, and its negative pole is connected with controllable silicon Q1 control pole.
2. the control circuit of the earth leakage protective device according to claim 1 with open-phase 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 open-phase protection, it is characterised in that the temperature-sensitive
Detection module includes thermistor RT, divider resistance R2, divider resistance R3 and switching diode D3, thermistor RT and partial pressure electricity
Hinder after R2, divider resistance R3 series connection and at filter capacitor C6 two ends, switching diode D3 positive pole be connected on thermistor RT and
At divider resistance R3 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 open-phase protection, it is characterised in that the temperature-sensitive
Resistance RT uses the thermistor of negative temperature coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720063534.8U CN206412750U (en) | 2017-01-19 | 2017-01-19 | The control circuit of earth leakage protective device with open-phase protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720063534.8U CN206412750U (en) | 2017-01-19 | 2017-01-19 | The control circuit of earth leakage protective device with open-phase protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206412750U true CN206412750U (en) | 2017-08-15 |
Family
ID=59555438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720063534.8U Active CN206412750U (en) | 2017-01-19 | 2017-01-19 | The control circuit of earth leakage protective device with open-phase protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206412750U (en) |
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2017
- 2017-01-19 CN CN201720063534.8U patent/CN206412750U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201106 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. |