CN207664597U - Residual current circuit breaker electronic circuit with FE lines - Google Patents
Residual current circuit breaker electronic circuit with FE lines Download PDFInfo
- Publication number
- CN207664597U CN207664597U CN201721714879.1U CN201721714879U CN207664597U CN 207664597 U CN207664597 U CN 207664597U CN 201721714879 U CN201721714879 U CN 201721714879U CN 207664597 U CN207664597 U CN 207664597U
- Authority
- CN
- China
- Prior art keywords
- circuit
- residual current
- lines
- connect
- capacitance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The input terminal of a kind of residual current circuit breaker electronic circuit with FE lines, power circuit is connect respectively with external power supply for taking electricity, the output end of power circuit to be connect with trip circuit and residual current detection circuit, and working power is provided for it；Further include zero sequence transformer TA, the input terminal of residual current detection circuit connect acquisition residual current signal with the both ends of the secondary circuit lead of zero sequence transformer TA, and output end and the trip circuit of residual current detection circuit are connected as it and provide trip signal；Further include FE line current-limiting circuits, the both ends of FE line current-limiting circuits are connect with residual current detection circuit and FE lines respectively, when the power supply N phases of external power supply and FE lines access circuit, electric current flows through power supply N phases and FE lines simultaneously, and the electric current that the control of FE line current-limiting circuits flows through FE lines prevents higher level's residual current circuit breaker from malfunctioning；When power supply N phases do not access circuit, FE lines are connect with trip circuit, and in circuit, there are trip circuit action is triggered when residual current.
Description
Technical field
The utility model is related to Low Voltage Electrical Apparatus, more particularly to a kind of residual current circuit breaker electronics electricity with FE lines
Road.
Background technology
On European market, low-voltage distribution system much uses TN connections, by the metal shell of electrical equipment and protection ground wire
Connect.Common electronic type residual current circuit breaker, since electronic circuit board loses power supply, will lose when N lines do not connect or break
Remove the defencive function to leak current fault.In order to avoid it is this kind of the occurrence of, FE lines can be increased on electronic circuit board and be connected to
It protects on ground wire, when N lines do not connect or break, replaces N lines to power for electronic circuit board using FE lines, accomplish that N line FE lines are double and protect
Danger.
Product increases FE lines on the basis of the leakage circuit of the two poles of the earth at present, one in parallel between varistor L, N, N, FE
Between one in parallel, in this way when L tests FE common-mode voltages, two pressure-sensitive series connection between L, FE, and voltage is between L, N
Twice, this will easily cause silicon-controlled false triggering.
When residual current circuit breaker normal use with FE lines, N line FE lines are intended to access, when occurring residual current in circuit
When failure, tripping coil conducting, which generates magnetic force, makes tripping mechanism act, this has several amperes even more than ten of peace in the process
The electric current of training generates, if FE lines do not do any processing, N lines will divide equally this electric current with FE lines, due to the electric current of TN connection FE lines
It is without flow through zero sequence transformer, this will cause the mistrip of higher level's residual current circuit breaker.
Invention content
The purpose of the utility model is to overcome the defects of the prior art, provide a kind of performance safety stabilization, simple in structure
The compact residual current circuit breaker electronic circuit with FE lines.
To achieve the above object, the utility model uses following technical solution：
A kind of residual current circuit breaker electronic circuit with FE lines, including power circuit, residual current detection circuit take off
Detain circuit and test circuit, the input terminal of the power circuit is connect respectively with external power supply for taking electricity, power circuit it is defeated
Outlet is connect with trip circuit and residual current detection circuit, and working power is provided for it；Further include zero sequence transformer TA, it is remaining
The input terminal of current detection circuit connect acquisition residual current signal with the both ends of the secondary circuit lead of zero sequence transformer TA, remains
The output end of aftercurrent detection circuit is connected as it with trip circuit and provides trip signal；Further include FE line current-limiting circuits, FE lines
The both ends of current-limiting circuit are connect with residual current detection circuit and FE lines respectively, when the power supply N phases and FE lines of external power supply connect
When entering circuit, electric current flows through power supply N phases and FE lines simultaneously, and the electric current that the control of FE line current-limiting circuits flows through FE lines prevents higher level remaining
Tie breaker malfunctions；When power supply N phases do not access circuit, FE lines are connect with trip circuit, and in circuit, there are residual currents
When triggering trip circuit action.
Further, the FE lines current-limiting circuit includes power resistor R4 and voltage limiting device, power resistor R4 and voltage limiting device
One end of power resistor R4 is connect with FE lines after series connection, and one end of voltage limiting device is connect with residual current detection circuit.
Further, the voltage limiting device is TVS pipe VD3；The anode of TVS pipe VD3 and one end of resistance connect, TVS pipe
The cathode of VD3 is connect with residual current detection circuit.
Further, further include surge protection circuit, the surge protection circuit is in y-type structure, including intermediate connection point NC,
Varistor of each phase line and PE lines of external power supply Jing Guo similar resistance is connect with intermediate connection point NC.
Further, the power circuit includes reduction voltage circuit and rectification circuit；One end of the reduction voltage circuit with it is external
The power supply L of power supply is connected, and the other end of reduction voltage circuit is connect with residual current detection circuit, one end of the rectification circuit with
The power supply N of external power supply is connected, and the other end is connect with FE line current-limiting circuits, and rectification circuit also connects with residual current detection circuit
It connects.
Further, the reduction voltage circuit includes the resistance R5 being connected in parallel and resistance R7, one end after being connected in parallel and electricity
Source L is connected, and the other end is connect with residual current detection circuit；The rectification circuit includes diode VD4 and diode VD5,
The cathode of diode VD4 is connect with FE line current-limiting circuits, and the anode of diode VD4 is connect with the anode of diode VD5, diode
The cathode of VD5 is connected with external power supply N, and intermediate node and the residual current detection circuit of diode VD4 and diode VD5 connect
It connects.
Further, the residual current detection circuit includes electric leakage signal acquisition process circuit and control circuit；Electric leakage letter
The input terminal of number acquisition process circuit connect acquisition residual current signal with the both ends of the secondary circuit lead of zero sequence transformer TA,
The output end of electric leakage signal acquisition process circuit and the input terminal of control circuit connect, and collected signal is fed back to control electricity
The output end on road, control circuit is connect with trip circuit, and trip signal is provided for it.
Further, the electric leakage signal acquisition process circuit includes sampling resistor R1, regulation resistance R1*, bilateral diode
VD1, capacitance C1, resistance R2, resistance R3, capacitance C2, capacitance C3, capacitance C4, capacitance C5, capacitance C6, capacitance C7, capacitance C8, surely
Pressure pipe VZ1 and pressure limiting chip IC 1；The both ends of the secondary circuit lead of zero sequence transformer TA and the first pin of pressure limiting chip IC 1
Between the second pin of pressure limiting chip IC 1, the regulation resistance R1*, sampling resistor R1, bilateral diode VD1, capacitance C1 and
Capacitance C2 is connected in the both ends of the secondary circuit lead of zero sequence transformer TA in parallel successively, and the both ends of resistance R3 are with capacitance C1's
One end is connected with one end of capacitance C2, and the both ends of resistance R2 are connect with the other end of the other end of capacitance C1 and capacitance C2；Capacitance
Between the first pin for being connected in pressure limiting chip IC 1 in parallel and the third pin of pressure limiting chip IC 1 of C3, one end of capacitance C4 with
Second pin of pressure limiting chip IC 1 connects, other end ground connection, one end of capacitance C6 and the 4th pin of pressure limiting chip IC 1 and limit
The 5th pin connection of chip IC 1, the other end is pressed to be connect with the third pin of pressure limiting chip IC 1, capacitance C7 is connected in limit in parallel
Between the 8th pin and the third pin of pressure limiting chip IC 1 of pressing chip IC 1, capacitance C5 is connected in pressure limiting chip IC 1 in parallel
Between 7th pin and the third pin of pressure limiting chip IC 1, capacitance C6 is connected in the 6th pin and limit of pressure limiting chip IC 1 in parallel
Between the 7th pin for pressing chip IC 1, the voltage-stabiliser tube VZ1 is connected in the third pin and pressure limiting core of pressure limiting chip IC 1 in parallel
Between the 8th pin of piece IC1；The control circuit includes silicon-controlled VT1 and varistor RV4, the sun of the silicon-controlled VT1
The connection of the input terminal of pole and trip circuit, the cathode of silicon-controlled VT1 and the control pole of silicon-controlled VT1 and electric leakage signal acquisition process
Circuit connects, and varistor RV4 is connected in parallel between the anode of silicon-controlled VT1 and the cathode of silicon-controlled VT1.
Further, trip circuit includes tripping coil JT, and one end of tripping coil JT is connect with power circuit, the other end with
The output end of residual current detection circuit connects.
Further, further include test circuit, test circuit includes test switch SB and resistance R6, tests switch SB and electricity
Resistance R6 is connected in series between the power supply L phases of external power supply and power supply N phases.
The utility model has the residual current circuit breaker electronic circuit of FE lines, when power supply N phases and FE lines access circuit
When, when breaker is operating normally, electric current will flow through power supply N phases and FE lines simultaneously, be concatenated on FE lines into FE line current-limiting circuits, can
The current controls of FE lines will be flowed through in very small threshold value, to prevent from causing the malfunction of higher level's residual current circuit breaker
Make；When N lines do not access, current-limiting circuit is composed in series bleeder circuit with tripping coil, when voltage is more than certain value, still may be used
So that tripping coil acts, overall performance safety and stability.Surge protection circuit is in y-type structure, it is ensured that arbitrary the two of three lines
There is the varistor for being serially connected with similar resistance between root, in the presence of surge voltage, the electrical status of three lines is equivalent, Ke Yigeng
The false triggering of good inhibition silicon-controlled device.Two varistors series connection tolerance surge impacts, it is each it is pressure-sensitive on voltage just only
Have half, can select small pressure-sensitive of rated voltage, diameter can smaller, the requirement for height of electronic circuit board can be reduced, saved
Space.
Description of the drawings
Fig. 1 is the overall structure diagram for the residual current circuit breaker electronic circuit that the utility model has FE lines；
Fig. 2 is the physical circuit figure for the residual current circuit breaker electronic circuit that the utility model has FE lines.
Specific implementation mode
Below in conjunction with the embodiment that attached drawing 1 to 2 provides, the residual current with FE lines of the utility model is further illustrated
The specific implementation mode of circuit breaker electronics.The residual current circuit breaker electronic circuit with FE lines of the utility model is unlimited
In the following description.
As shown in Figure 1, 2, the utility model has the residual current circuit breaker electronic circuit of FE lines, including power circuit,
Residual current detection circuit, trip circuit and test circuit.The input terminal of the power circuit connect use with external power supply respectively
In taking electricity, the output end of power circuit to be connect with trip circuit and residual current detection circuit, working power is provided for it；Also wrap
Zero sequence transformer TA is included, the input terminal of residual current detection circuit is connect with the both ends of the secondary circuit lead of zero sequence transformer TA
Residual current signal is acquired, output end and the trip circuit of residual current detection circuit are connected as it and provide trip signal；Also wrap
FE line current-limiting circuits are included, the both ends of FE line current-limiting circuits are connect with residual current detection circuit and FE lines respectively, work as external power supply
Power supply N phases and FE lines when accessing circuit, electric current flows through power supply N phases and FE lines simultaneously, and the control of FE line current-limiting circuits flows through FE
The electric current of line prevents higher level's residual current circuit breaker from malfunctioning；When power supply N phases do not access circuit, FE lines connect with trip circuit
It connects, in circuit, there are trip circuit action is triggered when residual current.The utility model has the residual current circuit breaker electricity of FE lines
Sub-circuit, when power supply N phases access circuit with FE lines, when breaker is operating normally, electric current will flow through power supply N phases and FE simultaneously
Line is concatenated on FE lines into FE line current-limiting circuits, can will flow through the current controls of FE lines in very small threshold value, to prevent
Only cause the malfunction of higher level's residual current circuit breaker；When N lines do not access, current-limiting circuit is composed in series partial pressure with tripping coil
Circuit still can be such that tripping coil acts, overall performance safety and stability when voltage is more than certain value.
As shown in Fig. 2, the specific embodiment that external power supply is two-phase is given below, including power supply L phases, power supply N phases also connect
Enter PE lines, it is clear that can be more phases.Specifically, the FE lines current-limiting circuit includes power resistor R4 and voltage limiting device, power
One end of power resistor R4 is connect with FE lines after resistance R4 and voltage limiting device are connected, and one end and the residual current of voltage limiting device are examined
Slowdown monitoring circuit connects.The voltage limiting device is TVS pipe VD3 or Transient Suppression Diode；The anode of TVS pipe VD3 and the one of resistance
End connection, the cathode of TVS pipe VD3 are connect with residual current detection circuit.
As shown in Fig. 2, further including surge protection circuit, the surge protection circuit is in y-type structure, including intermediate connection point
NC, the varistor of each phase line and PE lines of external power supply Jing Guo similar resistance are connect with intermediate connection point NC.In being provided in figure
Between two resistance are respectively provided between tie point NC and each phase line, provided of course that being the varistor that even number can accomplish every phase
Resistance value is identical.Surge protection circuit is in y-type structure, it is ensured that has between arbitrary two of three lines and is serially connected with similar resistance
Varistor, in the presence of surge voltage, the electrical status of three lines is equivalent, and the mistake of silicon-controlled device can preferably be inhibited to touch
Hair.Two varistors series connection tolerance surge impacts, it is each it is pressure-sensitive on voltage just there was only half, rated voltage can be selected small
It is pressure-sensitive, diameter can smaller, can reduce the requirement for height of electronic circuit board, save space.
As shown in Fig. 2, the power circuit includes reduction voltage circuit and rectification circuit；One end of the reduction voltage circuit with it is external
The power supply L of power supply is connected, and the other end of reduction voltage circuit is connect with residual current detection circuit, one end of the rectification circuit with
The power supply N of external power supply is connected, and the other end is connect with FE line current-limiting circuits, and rectification circuit also connects with residual current detection circuit
It connects.
Specifically, the reduction voltage circuit includes the resistance R5 being connected in parallel and resistance R7, one end after being connected in parallel and electricity
Source L is connected, and the other end is connect with residual current detection circuit；The rectification circuit includes diode VD4 and diode VD5,
The cathode of diode VD4 is connect with FE line current-limiting circuits, and the anode of diode VD4 is connect with the anode of diode VD5, diode
The cathode of VD5 is connected with external power supply N, and intermediate node and the residual current detection circuit of diode VD4 and diode VD5 connect
It connects.Power resistor R5, R7 are in parallel, play decompression metering function, and two parallel connections can be reduced single ohmically with increasing heat radiation area
Power consumption；
As shown in Fig. 2, the residual current detection circuit includes electric leakage signal acquisition process circuit and control circuit；Electric leakage
The input terminal of signal acquisition processing circuit connect acquisition residual current with the both ends of the secondary circuit lead of zero sequence transformer TA
Signal, the output end of electric leakage signal acquisition process circuit and the input terminal of control circuit connect, and collected signal is fed back to
The output end of control circuit, control circuit is connect with trip circuit, and trip signal is provided for it.
Specifically, the electric leakage signal acquisition process circuit includes sampling resistor R1, regulation resistance R1*, bilateral diode
VD1, capacitance C1, resistance R2, resistance R3, capacitance C2, capacitance C3, capacitance C4, capacitance C5, capacitance C6, capacitance C7, capacitance C8, surely
Pressure pipe VZ1 and pressure limiting chip IC 1；The both ends of the secondary circuit lead of zero sequence transformer TA and the first pin of pressure limiting chip IC 1
Between the second pin of pressure limiting chip IC 1, the regulation resistance R1*, sampling resistor R1, bilateral diode VD1, capacitance C1 and
Capacitance C2 is connected in the both ends of the secondary circuit lead of zero sequence transformer TA in parallel successively, and resistance R1 is sampling resistor, resistance R1*
For regulation resistance, for when mutual inductor output has deviation Regulate signal size, bilateral diode VD1 play voltage-limiting protection,
The size protection chip IC 1 of limitation signal voltage when having surge current in the loop；The one end at the both ends and capacitance C1 of resistance R3
It is connected with one end of capacitance C2, the both ends of resistance R2 are connect with the other end of the other end of capacitance C1 and capacitance C2, and capacitance C2 rises
Filter rectification acts on, and ensures that the voltage of chip IC 1 is direct current, resistance R2, R3, capacitance C1 composition filter circuits；Capacitance C3's and
Connection is connected between the first pin of pressure limiting chip IC 1 and the third pin of pressure limiting chip IC 1, and capacitance C3 is filter capacitor, electricity
The one end for holding C4 is connect with the second pin of pressure limiting chip IC 1, and other end ground connection, capacitance C4 is delay capacitor, can be adjusted dynamic
Make the response time；One end of capacitance C6 is connect with the 5th pin of the 4th pin of pressure limiting chip IC 1 and pressure limiting chip IC 1, separately
One end is connect with the third pin of pressure limiting chip IC 1, and capacitance C7 is connected in the 8th pin and pressure limiting core of pressure limiting chip IC 1 in parallel
Between the third pin of piece IC1, capacitance C5 is connected in the third of the 7th pin and pressure limiting chip IC 1 of pressure limiting chip IC 1 in parallel
Between pin, capacitance C5 connection SCR controls pole filters adjustment effect；Capacitance C6 is connected in the of pressure limiting chip IC 1 in parallel
Between six pins and the 7th pin of pressure limiting chip IC 1, the voltage-stabiliser tube VZ1 is connected in the third pipe of pressure limiting chip IC 1 in parallel
Between foot and the 8th pin of pressure limiting chip IC 1, voltage-stabiliser tube VZ1 plays pressure limiting, and the voltage of limitation chip IC 1 is no more than
5.1V；The control circuit include silicon-controlled VT1 and varistor RV4, the silicon-controlled VT1 anode and trip circuit it is defeated
Enter end to connect, the control pole of the cathode of silicon-controlled VT1 and silicon-controlled VT1 are connect with electric leakage signal acquisition process circuit, pressure-sensitive electricity
Resistance RV4 is connected in parallel between the anode of silicon-controlled VT1 and the cathode of silicon-controlled VT1, and varistor RV4 is connected in parallel on silicon-controlled two
End, absorbing surge voltage prevents silicon-controlled false triggering.Pressure limiting chip IC 1 judges whether that output is de- for responding residual current signal
Detain signal；Silicon-controlled VT1 can be realized conducting and shutdown by the control of IC1.
As shown in Fig. 2, trip circuit includes tripping coil JT, one end of tripping coil JT is connect with power circuit, another
End is connect with the output end of residual current detection circuit.Tripping coil JT is connected in major loop, has inhibition to make surge voltage
With.
As shown in Fig. 2, further include test circuit, test circuit includes test switch SB and resistance R6, test switch SB with
Resistance R6 is connected in series between the power supply L phases of external power supply and power supply N phases.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is confined to these explanations.For the ordinary skill of the utility model technical field
For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, should all regard
To belong to the scope of protection of the utility model.
Claims (10)
1. a kind of residual current circuit breaker electronic circuit with FE lines, including power circuit, residual current detection circuit are threaded off
Circuit and test circuit, it is characterised in that：The input terminal of the power circuit is connect respectively with external power supply for taking electricity, power supply
The output end of circuit is connect with trip circuit and residual current detection circuit, and working power is provided for it；It further include zero-sequence mutual inductance
Device TA, the input terminal of residual current detection circuit connect the remaining electricity of acquisition with the both ends of the secondary circuit lead of zero sequence transformer TA
Signal is flowed, output end and the trip circuit of residual current detection circuit are connected as it and provide trip signal；
Further include FE line current-limiting circuits, the both ends of FE line current-limiting circuits are connect with residual current detection circuit and FE lines respectively, when
When the power supply N phases and FE lines of external power supply access circuit, electric current flows through power supply N phases and FE lines, FE line current-limiting circuit controls simultaneously
The electric current that system flows through FE lines prevents higher level's residual current circuit breaker from malfunctioning；When power supply N phases do not access circuit, FE lines and dropout
Circuit connects, and in circuit, there are trip circuit action is triggered when residual current.
2. the residual current circuit breaker electronic circuit according to claim 1 with FE lines, it is characterised in that：The FE lines
Current-limiting circuit includes power resistor R4 and voltage limiting device, after power resistor R4 and voltage limiting device series connection one end of power resistor R4 with
FE lines connect, and one end of voltage limiting device is connect with residual current detection circuit.
3. the residual current circuit breaker electronic circuit according to claim 2 with FE lines, it is characterised in that：The pressure limiting
Device is TVS pipe VD3；The anode of TVS pipe VD3 and one end of resistance connect, cathode and the residual current detection electricity of TVS pipe VD3
Road connects.
4. according to any residual current circuit breaker electronic circuits with FE lines of claim 1-3, it is characterised in that：Also
Including surge protection circuit, the surge protection circuit is in y-type structure, including intermediate connection point NC, each phase line of external power supply
It is connect with varistor of the PE lines Jing Guo similar resistance with intermediate connection point NC.
5. the residual current circuit breaker electronic circuit according to claim 1 with FE lines, it is characterised in that：The power supply
Circuit includes reduction voltage circuit and rectification circuit；One end of the reduction voltage circuit is connected with the power supply L of external power supply, reduction voltage circuit
The other end connect with residual current detection circuit, one end of the rectification circuit is connected with the power supply N of external power supply, another
End is connect with FE line current-limiting circuits, and rectification circuit is also connect with residual current detection circuit.
6. the residual current circuit breaker electronic circuit according to claim 5 with FE lines, it is characterised in that：The decompression
Circuit includes the resistance R5 being connected in parallel and resistance R7, and one end after being connected in parallel is connected with power supply L, the other end and residue electricity
Current detection circuit connects；The rectification circuit includes diode VD4 and diode VD5, cathode and the FE line current limlitings of diode VD4
Circuit connects, and the anode of diode VD4 is connect with the anode of diode VD5, and the cathode of diode VD5 is connected with external power supply N
It connects, the intermediate node of diode VD4 and diode VD5 are connect with residual current detection circuit.
7. the residual current circuit breaker electronic circuit according to claim 1 with FE lines, it is characterised in that：The residue
Current detection circuit includes electric leakage signal acquisition process circuit and control circuit；The input terminal of electric leakage signal acquisition process circuit with
The secondary circuit lead of zero sequence transformer TA both ends connection acquisition residual current signal, electric leakage signal acquisition process circuit it is defeated
The input terminal of outlet and control circuit connects, and collected signal is fed back to control circuit, the output end of control circuit with it is de-
Circuit connection is detained, trip signal is provided for it.
8. the residual current circuit breaker electronic circuit according to claim 7 with FE lines, it is characterised in that：The electric leakage
Signal acquisition processing circuit includes sampling resistor R1, regulation resistance R1*, bilateral diode VD1, capacitance C1, resistance R2, resistance
R3, capacitance C2, capacitance C3, capacitance C4, capacitance C5, capacitance C6, capacitance C7, capacitance C8, voltage-stabiliser tube VZ1 and pressure limiting chip IC 1；Zero
Second pin at the both ends of the secondary circuit lead of sequence mutual inductor TA and the first pin of pressure limiting chip IC 1 and pressure limiting chip IC 1
Between, the regulation resistance R1*, sampling resistor R1, bilateral diode VD1, capacitance C1 and capacitance C2 are connected in zero in parallel successively
The both ends at the both ends of the secondary circuit lead of sequence mutual inductor TA, resistance R3 are connect with one end of one end of capacitance C1 and capacitance C2,
The both ends of resistance R2 are connect with the other end of the other end of capacitance C1 and capacitance C2；Capacitance C3's is connected in pressure limiting chip in parallel
Between the first pin of IC1 and the third pin of pressure limiting chip IC 1, one end of capacitance C4 and the second pin of pressure limiting chip IC 1
Connection, other end ground connection, one end of capacitance C6 connects with the 4th pin of pressure limiting chip IC 1 and the 5th pin of pressure limiting chip IC 1
Connect, the other end is connect with the third pin of pressure limiting chip IC 1, capacitance C7 be connected in parallel pressure limiting chip IC 1 the 8th pin and
Between the third pin of pressure limiting chip IC 1, capacitance C5 is connected in the 7th pin and pressure limiting chip IC 1 of pressure limiting chip IC 1 in parallel
Third pin between, capacitance C6 be connected in parallel pressure limiting chip IC 1 the 6th pin and pressure limiting chip IC 1 the 7th pin it
Between, the voltage-stabiliser tube VZ1 is connected in parallel between the third pin of pressure limiting chip IC 1 and the 8th pin of pressure limiting chip IC 1；Institute
The input terminal for stating anode and trip circuit that control circuit includes silicon-controlled VT1 and varistor RV4, the silicon-controlled VT1 connects
It connects, the control pole of the cathode of silicon-controlled VT1 and silicon-controlled VT1 are connect with electric leakage signal acquisition process circuit, and varistor RV4 is simultaneously
Connection is connected between the anode of silicon-controlled VT1 and the cathode of silicon-controlled VT1.
9. the residual current circuit breaker electronic circuit according to claim 1 with FE lines, it is characterised in that：Trip circuit
Including tripping coil JT, one end of tripping coil JT is connect with power circuit, the output of the other end and residual current detection circuit
End connection.
10. the residual current circuit breaker electronic circuit according to claim 1 with FE lines, it is characterised in that：Further include
Test circuit, test circuit include test switch SB and resistance R6, and test switch SB and resistance R6 is connected in series in external power supply
Power supply L phases and power supply N phases between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721714879.1U CN207664597U (en) | 2017-12-11 | 2017-12-11 | Residual current circuit breaker electronic circuit with FE lines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721714879.1U CN207664597U (en) | 2017-12-11 | 2017-12-11 | Residual current circuit breaker electronic circuit with FE lines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207664597U true CN207664597U (en) | 2018-07-27 |
Family
ID=62941072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721714879.1U Active CN207664597U (en) | 2017-12-11 | 2017-12-11 | Residual current circuit breaker electronic circuit with FE lines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207664597U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111864694A (en) * | 2019-04-30 | 2020-10-30 | 上海复旦微电子集团股份有限公司 | Residual current protection circuit |
| CN112531642A (en) * | 2020-12-02 | 2021-03-19 | 真兰电气(上海)有限公司 | Residual current protection circuit and residual current protection device |
-
2017
- 2017-12-11 CN CN201721714879.1U patent/CN207664597U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111864694A (en) * | 2019-04-30 | 2020-10-30 | 上海复旦微电子集团股份有限公司 | Residual current protection circuit |
| CN111864694B (en) * | 2019-04-30 | 2022-09-27 | 上海复旦微电子集团股份有限公司 | Residual current protection circuit |
| CN112531642A (en) * | 2020-12-02 | 2021-03-19 | 真兰电气(上海)有限公司 | Residual current protection circuit and residual current protection device |
| CN112531642B (en) * | 2020-12-02 | 2023-04-07 | 真兰电气(上海)有限公司 | Residual current protection circuit and residual current protection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4912589A (en) | Surge suppression on AC power lines | |
| CN104617571B (en) | A kind of electronic electric equipment over-voltage and over-current protector | |
| CN103023003B (en) | Overvoltage absorbing circuit and overvoltage absorbing device | |
| CN207664597U (en) | Residual current circuit breaker electronic circuit with FE lines | |
| CN102035163A (en) | Power supply device for residual current protector | |
| CN202197094U (en) | Power transmission line intelligent fault monitoring coupling power supply protective device | |
| CN101944721A (en) | Valve fault detection treatment method of high-voltage direct-current transmission system | |
| CN107800117B (en) | Input overvoltage protection circuit with power-on surge current suppression function | |
| CN201918692U (en) | Power supply device for residual current protector | |
| EP2901535A2 (en) | Overvoltage protection with spark gap and triggering circuit | |
| FI124199B (en) | Electronic protection circuit and protective device | |
| CN205335836U (en) | A overvoltage protector for photovoltaic equipment | |
| CN210724199U (en) | Direct current dual input power surge suppression circuit | |
| CN2932790Y (en) | An AC over-voltage protector | |
| EP2983262A1 (en) | Current-limiting device | |
| CN204967234U (en) | Multi -functional residual current operated circuit breaker circuit | |
| CN207339261U (en) | A kind of overvoltage protection device for preventing high pressure from sealing in electrification display | |
| CN202142736U (en) | Earth leakage protection plug | |
| RU2619777C2 (en) | Device for protection of electrical consumers from overvoltage in single-phase ac networks | |
| CN207117178U (en) | A kind of signal Surge Protector | |
| CN109217238B (en) | Protection circuit and electronic equipment | |
| CN106026017A (en) | Leakage breaker with over-voltage protection and under-voltage protection | |
| CN208690933U (en) | Protect circuit and pitch-controlled system | |
| CN106898999A (en) | A kind of breaker protected with anti-virtual connection, earth leakage protective, fault electric arc | |
| CN205123226U (en) | Circuit breaker circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |