CN205960628U - Current leakage protection device - Google Patents
Current leakage protection device Download PDFInfo
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- CN205960628U CN205960628U CN201620827554.3U CN201620827554U CN205960628U CN 205960628 U CN205960628 U CN 205960628U CN 201620827554 U CN201620827554 U CN 201620827554U CN 205960628 U CN205960628 U CN 205960628U
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Abstract
The utility model provides a current leakage protection device, includes leakage protection circuit, leakage protection circuit includes power supply circuit, leakage detection control circuit, trip circuit and control circuit, power supply circuit's input respectively with power L1 looks, power L2 congruence power L3 is connected and is used for getting the electricity, power supply circuit's output is connected with trip circuit, leakage detection control circuit and control circuit provides working power supply for it, power supply circuit includes rectifier circuit, and rectifier circuit makes the voltage after the rectification have the zero crossing for half -wave rectification, and the rectifier circuit who has the zero crossing is connected with control circuit, leakage detection control circuit's output is connected with control circuit's input, and control circuit's output and trip circuit are connected, when leakage detection control stopped to the control signal of control circuit output electric leakage and the voltage zero passage after the rectifier circuit rectification, control circuit turn -offed. The utility model provides a simple structure, stable performance, current leakage protection device with low costs.
Description
Technical field
The utility model is related to Low Voltage Electrical Apparatus, particularly to a kind of leakage protection circuit of earth leakage protective device.
Background technology
On Vehicles Collected from Market, RCCB leakage protection module is mainly used in single-phase earth leakage, is only capable of detecting in electric power system
Wherein one mutually it is impossible to realize three phase mains product three-phase is realized protecting simultaneously.Even if there is three-phase electricity to realize earth leakage protective simultaneously
Device, also exist when user install three-phase electrical circuit breakers when, such as pay no heed to, breaker output end misconnection entered three-phase electricity
Input, when product produces leakage current, can bring product to burn, the phenomenon of impact human-body safety.Three-phase electric leakage protection device ratio
During single-phase electric leakage protector reverse wiring, burn that power is bigger, the harm that human body is caused is bigger.
Content of the invention
The purpose of this utility model is to overcome the defect of prior art, provides a kind of structure simple, stable performance, cost
Low earth leakage protective device.
For achieving the above object, the utility model employs following technical scheme：
A kind of earth leakage protective device, including leakage protection circuit, described leakage protection circuit includes power circuit, electric leakage inspection
Survey control circuit, trip circuit and control circuit；The input of described power circuit respectively with power supply L1 phase, power supply L2 phase and electricity
Source L3 is connected for power taking, and the output end of power circuit is connected with trip circuit, electricity leakage detection control circuit and control circuit
There is provided working power for it；Described power circuit includes rectification circuit, and rectification circuit makes the voltage after rectification for halfwave rectifier
There is zero crossing, the rectification circuit with zero crossing is connected with control circuit；The output end of electricity leakage detection control circuit and control
The input of circuit connects, and the output end of control circuit is connected with trip circuit；Control in detection of electrical leakage and stop to control circuit
When exporting the voltage zero-cross after the control signal leaked electricity and rectifier circuit rectifies, control circuit turns off.
Further, ZCT TA, the input of electricity leakage detection control circuit and the two of ZCT TA are also included
The two ends of minor loop lead connect, and described electricity leakage detection control circuit includes the control chip U1 that leaks electricity, electric leakage control chip U1's
Input is connected with power circuit, and the output end of electric leakage control chip U1 is connected with control circuit, when electric leakage signal reaches action
During electric current, electric leakage control chip U1 exports high level to control circuit, and when electric leakage signal disappears, control chip U1 is short for electric leakage
In time, output high level is switched to low level.
Further, described rectification circuit includes diode VD1, diode VD2, diode VD3 and diode VD4；Described
The positive pole of the positive pole of diode VD1 and diode VD2 is respectively connecting to power supply L1 phase and power supply L2 phase, the negative pole of diode VD1
It is connected simultaneously to trip circuit with the negative pole of diode VD2, the positive pole of the positive pole of diode VD3 and diode VD4 is simultaneously connected with
To control circuit, the negative pole of the negative pole of diode VD3 and diode VD4 is respectively connecting to power supply L2 phase and power supply L3 phase.
Further, described electric-leakage detection circuit also includes resistance R1, bilateral diode D1, resistance R2, resistance R3, electric capacity
C1, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5；The two ends of the secondary circuit lead of described ZCT TA are respectively through electricity
Resistance R2 and resistance R3 is respectively connecting to leak electricity second pin of control chip U1 and first pin of electric leakage control chip U1, resistance
R1, bilateral diode D1 and electric capacity C1 are connected in the first pin and the electric leakage control chip U1 of electric leakage control chip U1 successively in parallel
The second pin between, one end of electric capacity C2 is connected simultaneously to leak electricity the 4th pin of control chip U1 and electric leakage control chip U1
The 5th pin, the other end connect to electric leakage control chip U1 three-prong, one end of electric capacity C3 with electric leakage control chip U1
Three-prong connect, the other end with electric leakage control chip U1 the 6th pin is connected, one end of electric capacity C5 with leak electricity control core
8th pin of piece U1 connects, and the other end is connected with the three-prong of electric leakage control chip U1, and one end of electric capacity C4 is controlled with electric leakage
7th pin of coremaking piece U1 connects, and the other end is connected with the three-prong of electric leakage control chip U1, electric leakage control chip U1's
7th pin is connected with control circuit.
Further, described power circuit also includes reduction voltage circuit, the input of rectification circuit respectively with power supply L1 phase, power supply
L2 phase is connected with power supply L3, and the output end of rectification circuit is connected with the input of trip circuit, control circuit and reduction voltage circuit,
The output end of reduction voltage circuit is connected with electricity leakage detection control circuit.
Further, described reduction voltage circuit includes resistance R5 and resistance R6, after resistance R5 and resistance R6 is connected in series, resistance R5
One end be connected with rectification circuit, one end of resistance R6 is connected with electricity leakage detection control circuit.
Further, described control circuit includes the controllable silicon VT1 being connected in series and controllable silicon VT2；Described controllable silicon VT1's
Anode is connected with trip circuit, and the negative electrode of controllable silicon VT1 is connected with the anode of controllable silicon VT2, the negative electrode of controllable silicon VT2 and rectification
Circuit connects；The G pole of the G pole of controllable silicon VT1 and controllable silicon VT2 is connected simultaneously to electricity leakage detection control circuit.
Further, control circuit also includes diode VD6, resistance R4 and piezo-resistance RV1, diode VD6 and resistance R4
Two ends after being connected in series are connected in parallel between the anode of controllable silicon VT1 and the G pole of controllable silicon VT1 respectively, piezo-resistance RV1
It is connected in the two ends of control circuit in parallel, surge absoption protection is carried out to control circuit.
Further, also include surge absoption loop, including piezo-resistance RV1, piezo-resistance RV2 and piezo-resistance RV3, press
Two ends after quick resistance RV2 and the series connection of piezo-resistance RV3 are connected in parallel between power supply L1 phase and power supply L2 phase, piezo-resistance
Two ends after RV1 and the series connection of piezo-resistance RV3 are connected in parallel between power supply L1 phase and power supply L3 phase, piezo-resistance RV1 and pressure
Two ends after quick resistance RV2 series connection are connected in parallel between power supply L2 phase and power supply L3 phase.
Further, described trip circuit includes tripping coil L1 and diode VD5, and tripping coil L1 and diode VD5 are simultaneously
One end after connection is connected with rectification circuit, and the other end after parallel connection is connected with control circuit.
The utility model makes the voltage after rectification have zero crossing by arranging half-wave rectifying circuit, and detection of electrical leakage controls
When electric circuit inspection is to electric leakage signal, trip circuit triggering trip operation cut-out circuit；If user's correct wiring, electric sub-member plate
Not charged, can prevent electric sub-member plate from burning；If user's reverse wiring, electricity leakage detection control circuit inputs in electric leakage signal and disappears
When, stop to control circuit output electric leakage control signal and rectifier circuit rectifies after voltage zero-cross when, make control circuit close
Disconnected, the use safety it is ensured that product is burnt prevented also from electric sub-member plate.The utility model half-wave rectifying circuit：On the one hand
The voltage after rectification is made to have zero crossing；On the other hand, wherein one phase of breaking can also realize creepage protection function.
Brief description
Fig. 1 is the structural representation of the utility model leakage protection circuit；
Fig. 2 is the circuit diagram of the utility model leakage protection circuit；
Fig. 3 is the schematic diagram of the utility model earth leakage protective device correct wiring；
Fig. 4 is the schematic diagram of the utility model earth leakage protective device reverse wiring.
Specific embodiment
The embodiment being given below in conjunction with accompanying drawing 1 to 4, further illustrates the concrete of earth leakage protective device of the present utility model
Embodiment.Earth leakage protective device of the present utility model is not limited to the following description.
As shown in Figure 1, 2, the utility model earth leakage protective device, including leakage protection circuit.Described leakage protection circuit
Including power circuit, electricity leakage detection control circuit, trip circuit and control circuit；The input of described power circuit respectively with electricity
Source L1 phase, power supply L2 phase is connected for power taking with power supply L3, and the output end of power circuit is controlled with trip circuit, detection of electrical leakage
Circuit and control circuit are connected as it and provide working power；Described power circuit includes rectification circuit, and rectification circuit is that half-wave is whole
Current circuit makes the voltage after rectification have zero crossing, and the rectification circuit with zero crossing is connected with control circuit；Detection of electrical leakage
The output end of control circuit is connected with the input of control circuit, and the output end of control circuit is connected with trip circuit；Electric leakage inspection
Survey control circuit and input in electric leakage signal and disappear, stop the control letter to control circuit output electric leakage in electricity leakage detection control circuit
Number and rectifier circuit rectifies after voltage zero-cross when, control circuit turn off.
Voltage zero-cross, refers generally to there is positive and negative direct current, such as pulse voltage, or has the alternating current of positive and negative amplitude, from
Just arrive negative, or it is necessary to through zero crossing, abbreviation zero passage when from negative to positive.
The utility model makes the voltage after rectification have zero crossing by arranging half-wave rectifying circuit, and detection of electrical leakage controls
When electric circuit inspection is to electric leakage signal, trip circuit triggering trip operation cut-out circuit；If user's correct wiring, electric sub-member plate
Not charged, can prevent electric sub-member plate from burning；If user's reverse wiring, electricity leakage detection control circuit inputs in electric leakage signal and disappears
When, stop to control circuit output control signal and the voltage zero-cross after rectifier circuit rectifies, so that control circuit is turned off, also can prevent
Only electric sub-member plate burns the use safety it is ensured that product.
As shown in Figure 1, 2, described trip circuit is between rectification circuit and control circuit.Also include ZCT
TA, the input of electricity leakage detection control circuit is connected with the two ends of the secondary circuit lead of ZCT TA.Described electric leakage inspection
Survey control circuit and include the control chip U1 that leaks electricity, the input of electric leakage control chip U1 is connected with power circuit, and electric leakage controls core
The output end of piece U1 is connected with control circuit, when electric leakage signal reaches action current, electric leakage control chip U1 output high level
To control circuit, when electric leakage signal disappears, output high level is switched to low level by electric leakage control chip U1 at short notice.This
In embodiment, control signal is sent to control circuit using electric leakage control chip U1, it would however also be possible to employ the control circuit of other forms
To realize this function.In addition, can also be other current acquisition elements for gathering the ZCT TA of current signal, such as electricity
Flow sensor etc..
As shown in Figure 1, 2, described electricity leakage detection control circuit also includes resistance R1, bilateral diode D1, resistance R2, resistance
R3, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5；The two ends of the secondary circuit lead of described ZCT TA are divided
It is not respectively connecting to, through resistance R2 and resistance R3, second pin and the first of electric leakage control chip U1 of control chip U1 that leaks electricity
Pin, resistance R1, bilateral diode D1 and electric capacity C1 are connected in the first pin and the electric leakage of electric leakage control chip U1 successively in parallel
Between second pin of control chip U1, one end of electric capacity C2 is connected simultaneously to the 4th pin and the electric leakage of electric leakage control chip U1
5th pin of control chip U1, the other end connects to three-prong, one end of electric capacity C3 and the electric leakage of electric leakage control chip U1
The three-prong of control chip U1 connects, and the other end is connected with the 6th pin of electric leakage control chip U1, one end of electric capacity C5 and
8th pin of electric leakage control chip U1 connects, and the other end is connected with the three-prong of electric leakage control chip U1, and the one of electric capacity C4
End is connected with the 7th pin of electric leakage control chip U1, and the other end is connected with the three-prong of electric leakage control chip U1, electric leakage control
7th pin of coremaking piece U1 is connected with control circuit.
As shown in Figure 1, 2, described half-wave rectifying circuit includes diode VD1, diode VD2, diode VD3 and diode
VD4；The positive pole of the positive pole of described diode VD1 and diode VD2 is respectively connecting to power supply L1 phase and power supply L2 phase, diode
The negative pole of the negative pole of VD1 and diode VD2 is connected simultaneously to trip circuit, the positive pole of the positive pole of diode VD3 and diode VD4
It is connected simultaneously to control circuit, the negative pole of the negative pole of diode VD3 and diode VD4 is respectively connecting to power supply L2 phase and power supply L3
Phase.
When disconnected L1 phase, power supply L2 phase is passed through diode VD2 and diode VD4 with power supply L3 phase and is formed loop；As disconnected L2
Xiang Shi, power supply L1 phase and power supply L3 phase are passed through diode VD1 and diode VD4 and are formed loop；When disconnected L3 phase, power supply L1 phase and
Power supply L2 phase is passed through diode VD1 and diode VD3 and is formed loop, even if thus reaching a certain phase of breaking, also can make earth leakage protective
Normal circuit operation.The half-wave rectifying circuit of the utility model earth leakage protective device：On the one hand the voltage after rectification is made to have
Zero crossing；On the other hand, wherein one phase of breaking can realize creepage protection function.
As shown in Figure 1, 2, described power circuit also includes reduction voltage circuit, the input of rectification circuit respectively with power supply L1
Phase, power supply L2 phase is connected with power supply L3, the input of the output end of rectification circuit and trip circuit, control circuit and reduction voltage circuit
End connects, and the output end of reduction voltage circuit is connected with the electric leakage control chip U1 of electricity leakage detection control circuit.Described reduction voltage circuit bag
Include resistance Rn, resistance Rn includes resistance R5 and resistance R6, after resistance R5 and resistance R6 is connected in series, one end of resistance R5 and rectification
Circuit connects, and one end of resistance R6 is connected with electricity leakage detection control circuit.Reduction voltage circuit will be rectified after voltage be depressured
After be supplied to electric leakage control chip U1, for electric leakage control chip U1 provide work power supply.
As shown in Figure 1, 2, described control circuit includes the controllable silicon VT1 being connected in series and controllable silicon VT2；Described controllable silicon
The anode of VT1 is connected with trip circuit, and the negative electrode of controllable silicon VT1 is connected with the anode of controllable silicon VT2, the negative electrode of controllable silicon VT2
It is connected with rectification circuit；The G pole of the G pole of controllable silicon VT1 and controllable silicon VT2 is connected simultaneously to the electric leakage of electricity leakage detection control circuit
Control chip U1.Control circuit also includes diode VD6, resistance R4 and piezo-resistance RV1, diode VD6 and resistance R4 series connection
Two ends after connection are connected in parallel between the anode of controllable silicon VT1 and the G pole of controllable silicon VT1 respectively, and piezo-resistance RV1 is in parallel
It is connected to the two ends of control circuit, surge absoption protection is carried out to control circuit.The utility model adopt two controllable silicon VT1 and
Controllable silicon VT2 forms two pole control circuits, so that single controllable silicon is born pressure double-diminished, prevents burn-out of silicon controlled rectifier, control circuit
Performance is more stable.Certainly, control circuit may also be employed single controllable silicon.
As shown in Figure 1, 2, also include surge absoption loop, including piezo-resistance RV1, piezo-resistance RV2 and piezo-resistance
Two ends after RV3, piezo-resistance RV2 and the series connection of piezo-resistance RV3 are connected in parallel between power supply L1 phase and power supply L2 phase, pressure-sensitive
Two ends after resistance RV1 and the series connection of piezo-resistance RV3 are connected in parallel between power supply L1 phase and power supply L3 phase, piezo-resistance RV1
With the two ends after the series connection of piezo-resistance RV2 are connected in parallel between power supply L2 phase and power supply L3 phase.
As shown in Figure 1, 2, trip circuit includes tripping coil L1 and diode VD5, and tripping coil L1 and diode VD5 are simultaneously
One end after connection is connected with rectification circuit, and the other end after parallel connection is connected with control circuit.Electricity after rectifier circuit rectifies
Pressure is connected with tripping coil L1, and the high current reverse impact of the controllable silicon turn-off transient generation of control circuit, by tripping coil
L1 and diode VD5 forms loop, is consumed in the way of heat energy.
Fig. 3 is the correct connection to product for the user, and Fig. 4 is the reverse wiring connection to product for the user.Traditional product works as user
During reverse wiring, there is leakage current to produce, electric sub-member plate connects power end, has power supply always, will not trip and power-off with mechanism, pass
The electric leakage integrated circuit of system once has leakage current to trigger in the case of having power supply, exports high level always to SCR control
Pole, leads to controllable silicon can not effectively close, and so that damage of product is even burnt.The electric leakage control chip U1 that the utility model adopts,
After leakage current disappears, even if in the case of having power supply, electric leakage control chip U1 output signal also will disappear, thus in power supply
When holding the voltage zero-cross after rectification circuit, effectively turn off, even if so user adopts reverse wiring connection, also can guarantee that product
The safety of product.
Above content be with reference to specific preferred embodiment further detailed description of the utility model it is impossible to
Identification is of the present utility model to be embodied as being confined to these explanations.Ordinary skill for the utility model art
For personnel, without departing from the concept of the premise utility, some simple deduction or replace can also be made, all should regard
For belonging to protection domain of the present utility model.
Claims (10)
1. a kind of earth leakage protective device, including leakage protection circuit it is characterised in that：Described leakage protection circuit includes power supply electricity
Road, electricity leakage detection control circuit, trip circuit and control circuit；The input of described power circuit respectively with power supply L1 phase, electricity
Source L2 phase is connected with power supply L3 for power taking, the output end of power circuit and trip circuit, electricity leakage detection control circuit and control
Circuit processed is connected as it and provides working power；
Described power circuit includes rectification circuit, and rectification circuit makes the voltage after rectification have zero crossing for halfwave rectifier, tool
The rectification circuit having zero crossing is connected with control circuit；
The output end of electricity leakage detection control circuit is connected with the input of control circuit, the output end of control circuit and trip circuit
Connect；Voltage zero-cross after detection of electrical leakage controls the control signal stopping leaking electricity to control circuit output and rectifier circuit rectifies
When, control circuit turns off.
2. earth leakage protective device according to claim 1 it is characterised in that：Also include ZCT TA, detection of electrical leakage
The input of control circuit is connected with the two ends of the secondary circuit lead of ZCT TA, described electricity leakage detection control circuit bag
Include electric leakage control chip U1, the input of electric leakage control chip U1 is connected with power circuit, the output end of electric leakage control chip U1
It is connected with control circuit, when electric leakage signal reaches action current, electric leakage control chip U1 exports high level to control circuit, when
When electric leakage signal disappears, output high level is switched to low level by electric leakage control chip U1 at short notice.
3. earth leakage protective device according to claim 1 and 2 it is characterised in that：Described rectification circuit includes diode
VD1, diode VD2, diode VD3 and diode VD4；The positive pole of the positive pole of described diode VD1 and diode VD2 connects respectively
It is connected to power supply L1 phase and power supply L2 phase, the negative pole of the negative pole of diode VD1 and diode VD2 is connected simultaneously to trip circuit, two
The positive pole of the positive pole of pole pipe VD3 and diode VD4 is connected simultaneously to control circuit, the negative pole of diode VD3 and diode VD4's
Negative pole is respectively connecting to power supply L2 phase and power supply L3 phase.
4. earth leakage protective device according to claim 2 it is characterised in that：Described electric-leakage detection circuit also includes resistance
R1, bilateral diode D1, resistance R2, resistance R3, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5；Described zero-sequence mutual inductance
The two ends of the secondary circuit lead of device TA are respectively connecting to the second of electric leakage control chip U1 respectively through resistance R2 and resistance R3
Pin and first pin of electric leakage control chip U1, resistance R1, bilateral diode D1 and electric capacity C1 are connected in electric leakage successively in parallel
Between second pin of first pin of control chip U1 and electric leakage control chip U1, one end of electric capacity C2 is connected simultaneously to leak electricity
4th pin of control chip U1 and the 5th pin of electric leakage control chip U1, the other end connects to the of electric leakage control chip U1
Three-prong, one end of electric capacity C3 is connected with the three-prong of electric leakage control chip U1, the other end with leak electricity the of control chip U1
Six pins connect, one end of electric capacity C5 with electric leakage control chip U1 the 8th pin is connected, the other end and leak electricity control chip U1
Three-prong connect, one end of electric capacity C4 with electric leakage control chip U1 the 7th pin is connected, the other end with leak electricity control core
The three-prong of piece U1 connects, and the 7th pin of electric leakage control chip U1 is connected with control circuit.
5. earth leakage protective device according to claim 1 and 2 it is characterised in that：Described power circuit also includes step-down electricity
Road, the input of rectification circuit respectively with power supply L1 phase, power supply L2 phase is connected with power supply L3, the output end of rectification circuit with de-
The input of button circuit, control circuit and reduction voltage circuit connects, and the output end of reduction voltage circuit is connected with electricity leakage detection control circuit.
6. earth leakage protective device according to claim 5 it is characterised in that：Described reduction voltage circuit includes resistance R5 and resistance
After R6, resistance R5 and resistance R6 are connected in series, one end of resistance R5 is connected with rectification circuit, one end of resistance R6 and detection of electrical leakage
Control circuit connects.
7. earth leakage protective device according to claim 1 it is characterised in that：What described control circuit included being connected in series can
Control silicon VT1 and controllable silicon VT2；The anode of described controllable silicon VT1 is connected with trip circuit, the negative electrode of controllable silicon VT1 and controllable silicon
The anode of VT2 connects, and the negative electrode of controllable silicon VT2 is connected with rectification circuit；The G of the G pole of controllable silicon VT1 and controllable silicon VT2 is extremely same
When connect to electricity leakage detection control circuit.
8. earth leakage protective device according to claim 7 it is characterised in that：Control circuit also includes diode VD6, resistance
Two ends after R4 and piezo-resistance RV1, diode VD6 and resistance R4 are connected in series are connected in the sun of controllable silicon VT1 respectively in parallel
Between the G pole of pole and controllable silicon VT1, piezo-resistance RV1 is connected in the two ends of control circuit in parallel, carries out surge to control circuit
Absorb protection.
9. earth leakage protective device according to claim 1 it is characterised in that：Also include surge absoption loop, including pressure-sensitive
Two ends after resistance RV1, piezo-resistance RV2 and piezo-resistance RV3, piezo-resistance RV2 and the series connection of piezo-resistance RV3 are connected in parallel
Between power supply L1 phase and power supply L2 phase, the two ends after piezo-resistance RV1 and the series connection of piezo-resistance RV3 are connected in power supply L1 in parallel
Mutually and power supply L3 phase between, the two ends after piezo-resistance RV1 and the series connection of piezo-resistance RV2 are connected in power supply L2 phase and power supply in parallel
Between L3 phase.
10. earth leakage protective device according to claim 1 it is characterised in that：Described trip circuit includes tripping coil L1
Is connected with rectification circuit with the one end after diode VD5, tripping coil L1 and diode VD5 parallel connection, in parallel after the other end and
Control circuit connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620827554.3U CN205960628U (en) | 2016-08-02 | 2016-08-02 | Current leakage protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620827554.3U CN205960628U (en) | 2016-08-02 | 2016-08-02 | Current leakage protection device |
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| Publication Number | Publication Date |
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| CN205960628U true CN205960628U (en) | 2017-02-15 |
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ID=57973257
Family Applications (1)
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| CN201620827554.3U Active CN205960628U (en) | 2016-08-02 | 2016-08-02 | Current leakage protection device |
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| Country | Link |
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| CN (1) | CN205960628U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110247366A (en) * | 2019-06-18 | 2019-09-17 | 德力西电气有限公司 | The leakage protection circuit of anti-coil burnout |
-
2016
- 2016-08-02 CN CN201620827554.3U patent/CN205960628U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110247366A (en) * | 2019-06-18 | 2019-09-17 | 德力西电气有限公司 | The leakage protection circuit of anti-coil burnout |
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