CN109672431A - One kind having earth leakage protective 3 phase AC solid relay circuit - Google Patents
One kind having earth leakage protective 3 phase AC solid relay circuit Download PDFInfo
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- CN109672431A CN109672431A CN201811444608.8A CN201811444608A CN109672431A CN 109672431 A CN109672431 A CN 109672431A CN 201811444608 A CN201811444608 A CN 201811444608A CN 109672431 A CN109672431 A CN 109672431A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/081—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
- H03K17/0812—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the control circuit
- H03K17/08124—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the control circuit in thyristor switches
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
- H03K17/725—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region for ac voltages or currents
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Abstract
The present invention relates to one kind to have earth leakage protective 3 phase AC solid relay circuit.Circuit of the present invention includes light every formula three-phase alternating current TRIAC driving circuit, three-phase electric leakage telemetry circuit.Specifically include A phase optocoupler IC1, B phase optocoupler IC2, C phase optocoupler IC3, inverse-impedance type thyristor VT1, A phase bidirectional thyristor VT2, B phase bidirectional thyristor VT3, C phase bidirectional thyristor VT4, residual current sensor SC1, left forward diode D1, left negative sense diode D2, right forward diode D3, right negative sense diode D4 etc..Ball bearing made scheme based on three optocouplers, three bidirectional thyristors, an inverse-impedance type thyristor, a residual current sensor that the present invention is switched using outlet side as semiconductor AC etc. can fully meet and carry out reliable real-time guard requirement to the leak current fault in 3 phase AC solid relay and its load circuit.The circuit is simple, at low cost, high reliablity, versatility are good, is easy to commercialization.
Description
Technical field
The invention belongs to industrial measurement and control fields, are related to a kind of circuit, in particular to a kind of to have earth leakage protective three intersection
Solid-state relay circuit is flowed, contactless the electric leakage three-phase alternating-current powered or driving circuit protected is opened suitable for requiring
Close the application of control.
Background technique
Non-contact type solid-state relay has many advantages, such as that no mechanical contact, response is rapid, the service life is long and obtains day due to it
Benefit is widely applied.Especially in three-phase alternating-current powered and three-phase alternating current driving circuit, increasingly to earth leakage protective requirement
Height requires to carry out when three-phase alternating current electric leakage occurs safeguard protection in time to avoid that personal safety accident occurs, to protection
The requirement of real-time of movement is high.It but is at present the 3 phase AC solid relay of power control device with bidirectional thyristor (TRIAC)
Device still lacks the product with reliable self-protection function to leak current fault.Therefore, how to design it is a kind of can be to three-phase alternating current
Electric leakage in time, reliably protect, and circuit is simple, is easy to the 3 phase AC solid relay scheme of commercialization, is this hair
Bright starting point.
Summary of the invention
The purpose of the present invention is in view of the deficienciess of the prior art, proposing a kind of 3 phase AC solid with leakage protection
Relay circuit.The circuit is made of light every formula three-phase alternating current TRIAC driving circuit, three-phase electric leakage telemetry circuit, and core is
Every phase for power control device, configures residual current sensor, and with a bidirectional thyristor (TRIAC) with inverse-impedance type thyristor
To protect control device, which can reliably carry out shutdown protection when three-phase alternating current load is leaked electricity.
Circuit of the present invention includes light every formula three-phase alternating current TRIAC driving circuit, three-phase electric leakage telemetry circuit.
Light includes that A phase optocoupler IC1, B phase optocoupler IC2, C phase optocoupler IC3, A phase are double every formula three-phase alternating current TRIAC driving circuit
Capacitor C1, A phase is driven to protect capacitor C2, B phase to thyristor VT2, B phase bidirectional thyristor VT3, C phase bidirectional thyristor VT4, A phase
Driving capacitor C3, B phase protects capacitor C4, C phase to drive capacitor C5, C phase that capacitor C6, current-limiting resistance R1, A is protected to fail to agree resistance R2, A
Mutually right resistance R3, A phase gate electrode resistance R4, A phase protective resistance R5, B fail to agree right resistance R7, B phase gate electrode resistance R8 of resistance R6, B phase,
B phase protective resistance R9, C fails to agree right resistance R11, C phase gate electrode resistance R12, C phase protective resistance R13, the A phase load of resistance R10, C phase
Load-A, B phase load Load-B, C phase load Load-C, positive that the end end IN+ is driven to connect with one end of current-limiting resistance R1, current limliting electricity
The other end of resistance R1 is connect with the anode of the anode of A phase optocoupler IC1 emission side, inverse-impedance type thyristor VT1, and A phase optocoupler IC1 shines
The cathode of side is connect with the anode of B phase optocoupler IC2 emission side, cathode and the C phase optocoupler IC3 emission side of B phase optocoupler IC2 emission side
Anode connection, the cathode of C phase optocoupler IC3 emission side and the cathode of inverse-impedance type thyristor VT1 negative drive the end end IN- to connect.
One end of A phase optocoupler IC1 outlet side is connect with the one end for failing to agree resistance R2 A, A phase optocoupler IC1 outlet side it is another
End is connect with the gate pole of one end of A phase gate electrode resistance R4, A phase bidirectional thyristor VT2, and it is surplus that AC power source A phase holds the end A line to pass through
It is protected after the detection hole of aftercurrent sensor CS1 with the 1st anode of A phase bidirectional thyristor VT2, one end of the right resistance R3 of A phase, A phase
One end connection of resistance R5 is protected, the other end and the A of the right resistance R3 of A phase fail to agree the other end of resistance R2, A phase drives the one of capacitor C1
End connection, the 2nd anode and the other end of A phase gate electrode resistance R4, the A phase of A phase bidirectional thyristor VT2 drive that capacitor C1's is another
End, A phase are connect with one end of A phase load Load-A again after protecting one end of capacitor C2 to connect, and A phase protects the other end of capacitor C2
It is connect with the other end of A phase protective resistance R5, the other end and one end of B phase load Load-B, the C phase of A phase load Load-A is born
It is connect again with AC power source zero line side N-terminal after the detection hole of residual current sensor CS1 after carrying one end connection of Load-C.
One end of B phase optocoupler IC2 outlet side is connect with the one end for failing to agree resistance R6 B, B phase optocoupler IC2 outlet side it is another
End is connect with the gate pole of one end of B phase gate electrode resistance R8, B phase bidirectional thyristor VT2, and it is surplus that AC power source B phase holds the end B line to pass through
It is protected after the detection hole of aftercurrent sensor CS1 with the 1st anode of B phase bidirectional thyristor VT3, one end of the right resistance R7 of B phase, B phase
One end connection of resistance R9 is protected, the other end and the B of the right resistance R7 of B phase fail to agree the other end of resistance R6, B phase drives the one of capacitor C3
End connection, the 2nd anode and the other end of B phase gate electrode resistance R8, the B phase of B phase bidirectional thyristor VT3 drive that capacitor C3's is another
End, B phase are connect with the other end of B phase load Load-B again after protecting one end of capacitor C4 to connect, and B phase protects that capacitor C4's is another
End is connect with the other end of B phase protective resistance R9.
One end of C phase optocoupler IC3 outlet side is connect with the one end for failing to agree resistance R10 C, C phase optocoupler IC3 outlet side it is another
End is connect with the gate pole of one end of C phase gate electrode resistance R12, C phase bidirectional thyristor VT4, and AC power source C phase holds C-terminal line to pass through
After the detection hole of residual current sensor CS1 with the 1st anode of C phase bidirectional thyristor VT4, one end of the right resistance R11 of C phase, C phase
One end of protective resistance R13 connects, and the other end and the C of the right resistance R11 of C phase fail to agree the other end of resistance R10, C phase drives capacitor
One end of C5 connects, and the 2nd anode and the other end of C phase gate electrode resistance R12, the C phase of C phase bidirectional thyristor VT4 drives capacitor C5
The other end, C phase protect capacitor C6 one end connect after connect again with the other end of C phase load Load-C, C phase protects capacitor C6
The other end connect with the other end of C phase protective resistance R13.
Three-phase electric leakage telemetry circuit include inverse-impedance type thyristor VT1, residual current sensor SC1, left forward diode D1,
Left negative sense diode D2, right forward diode D3, right negative sense diode D4, transfer resistance R14, filter resistance R15, divider resistance
R16, filter capacitor C7, the 1st end output end I1 of residual current sensor SC1 and anode, the left negative sense of left forward diode D1
The cathode of diode D2 connects, the 2nd end output end I2 of residual current sensor SC1 and anode, the right side of right forward diode D3
The cathode of negative sense diode D4 connects, cathode, the transfer resistance R14 of the cathode of left forward diode D1 and right forward diode D3
One end, filter resistance R15 one end connection, one end, the filter capacitor of the other end of filter resistance R15 and divider resistance R16
The gate pole connection of one end, inverse-impedance type thyristor VT1 of C7, the anode of left negative sense diode D2 and right negative sense diode D4, conversion
The other end of resistance R14, the other end of filter capacitor C7, the other end of divider resistance R16, the connection of the negative driving end end IN-.
Beneficial effects of the present invention are as follows:
Three optocouplers that the present invention is switched using outlet side as semiconductor AC, three bidirectional thyristors (TRIAC), one it is inverse
Ball bearing made scheme based on resistance type thyristor, a residual current sensor etc. can fully meet to 3 phase AC solid
Leak current fault in relay and its load circuit carries out reliable real-time guard requirement.The circuit is simple, at low cost, reliability
Height, versatility are good, are easy to commercialization.
Detailed description of the invention
Fig. 1 is circuit diagram of the invention.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
As shown in Figure 1, a kind of have earth leakage protective 3 phase AC solid relay circuit, including light is every formula three-phase alternating current
TRIAC driving circuit, three-phase electric leakage telemetry circuit.
Light includes that A phase optocoupler IC1, B phase optocoupler IC2, C phase optocoupler IC3, A phase are double every formula three-phase alternating current TRIAC driving circuit
Capacitor C1, A phase is driven to protect capacitor C2, B phase to thyristor VT2, B phase bidirectional thyristor VT3, C phase bidirectional thyristor VT4, A phase
Driving capacitor C3, B phase protects capacitor C4, C phase to drive capacitor C5, C phase that capacitor C6, current-limiting resistance R1, A is protected to fail to agree resistance R2, A
Mutually right resistance R3, A phase gate electrode resistance R4, A phase protective resistance R5, B fail to agree right resistance R7, B phase gate electrode resistance R8 of resistance R6, B phase,
B phase protective resistance R9, C fails to agree right resistance R11, C phase gate electrode resistance R12, C phase protective resistance R13, the A phase load of resistance R10, C phase
Load-A, B phase load Load-B, C phase load Load-C, positive that the end end IN+ is driven to connect with one end of current-limiting resistance R1, current limliting electricity
The other end of resistance R1 is connect with the anode of the anode of A phase optocoupler IC1 emission side, inverse-impedance type thyristor VT1, and A phase optocoupler IC1 shines
The cathode of side is connect with the anode of B phase optocoupler IC2 emission side, cathode and the C phase optocoupler IC3 emission side of B phase optocoupler IC2 emission side
Anode connection, the cathode of C phase optocoupler IC3 emission side and the cathode of inverse-impedance type thyristor VT1 negative drive the end end IN- to connect.
One end of A phase optocoupler IC1 outlet side is connect with the one end for failing to agree resistance R2 A, A phase optocoupler IC1 outlet side it is another
End is connect with the gate pole of one end of A phase gate electrode resistance R4, A phase bidirectional thyristor VT2, and it is surplus that AC power source A phase holds the end A line to pass through
It is protected after the detection hole of aftercurrent sensor CS1 with the 1st anode of A phase bidirectional thyristor VT2, one end of the right resistance R3 of A phase, A phase
One end connection of resistance R5 is protected, the other end and the A of the right resistance R3 of A phase fail to agree the other end of resistance R2, A phase drives the one of capacitor C1
End connection, the 2nd anode and the other end of A phase gate electrode resistance R4, the A phase of A phase bidirectional thyristor VT2 drive that capacitor C1's is another
End, A phase are connect with one end of A phase load Load-A again after protecting one end of capacitor C2 to connect, and A phase protects the other end of capacitor C2
It is connect with the other end of A phase protective resistance R5, the other end and one end of B phase load Load-B, the C phase of A phase load Load-A is born
It is connect again with AC power source zero line side N-terminal after the detection hole of residual current sensor CS1 after carrying one end connection of Load-C.
One end of B phase optocoupler IC2 outlet side is connect with the one end for failing to agree resistance R6 B, B phase optocoupler IC2 outlet side it is another
End is connect with the gate pole of one end of B phase gate electrode resistance R8, B phase bidirectional thyristor VT2, and it is surplus that AC power source B phase holds the end B line to pass through
It is protected after the detection hole of aftercurrent sensor CS1 with the 1st anode of B phase bidirectional thyristor VT3, one end of the right resistance R7 of B phase, B phase
One end connection of resistance R9 is protected, the other end and the B of the right resistance R7 of B phase fail to agree the other end of resistance R6, B phase drives the one of capacitor C3
End connection, the 2nd anode and the other end of B phase gate electrode resistance R8, the B phase of B phase bidirectional thyristor VT3 drive that capacitor C3's is another
End, B phase are connect with the other end of B phase load Load-B again after protecting one end of capacitor C4 to connect, and B phase protects that capacitor C4's is another
End is connect with the other end of B phase protective resistance R9.
One end of C phase optocoupler IC3 outlet side is connect with the one end for failing to agree resistance R10 C, C phase optocoupler IC3 outlet side it is another
End is connect with the gate pole of one end of C phase gate electrode resistance R12, C phase bidirectional thyristor VT4, and AC power source C phase holds C-terminal line to pass through
After the detection hole of residual current sensor CS1 with the 1st anode of C phase bidirectional thyristor VT4, one end of the right resistance R11 of C phase, C phase
One end of protective resistance R13 connects, and the other end and the C of the right resistance R11 of C phase fail to agree the other end of resistance R10, C phase drives capacitor
One end of C5 connects, and the 2nd anode and the other end of C phase gate electrode resistance R12, the C phase of C phase bidirectional thyristor VT4 drives capacitor C5
The other end, C phase protect capacitor C6 one end connect after connect again with the other end of C phase load Load-C, C phase protects capacitor C6
The other end connect with the other end of C phase protective resistance R13.
Three-phase electric leakage telemetry circuit include inverse-impedance type thyristor VT1, residual current sensor SC1, left forward diode D1,
Left negative sense diode D2, right forward diode D3, right negative sense diode D4, transfer resistance R14, filter resistance R15, divider resistance
R16, filter capacitor C7, the 1st end output end I1 of residual current sensor SC1 and anode, the left negative sense of left forward diode D1
The cathode of diode D2 connects, the 2nd end output end I2 of residual current sensor SC1 and anode, the right side of right forward diode D3
The cathode of negative sense diode D4 connects, cathode, the transfer resistance R14 of the cathode of left forward diode D1 and right forward diode D3
One end, filter resistance R15 one end connection, one end, the filter capacitor of the other end of filter resistance R15 and divider resistance R16
The gate pole connection of one end, inverse-impedance type thyristor VT1 of C7, the anode of left negative sense diode D2 and right negative sense diode D4, conversion
The other end of resistance R14, the other end of filter capacitor C7, the other end of divider resistance R16, the connection of the negative driving end end IN-.
It is used in the present invention include A phase optocoupler IC1, B phase optocoupler IC2, C phase optocoupler IC3, residual current sensor SC1,
Bis- pole inverse-impedance type thyristor VT1, A phase bidirectional thyristor VT2, B phase bidirectional thyristor VT3, C phase bidirectional thyristor VT4, Zuo Zhengxiang
All devices including pipe D1, left negative sense diode D2, right forward diode D3, right negative sense diode D4 etc. are all made of existing
Matured product can be obtained by market.Such as: optocoupler uses MOC3083, and residual current sensor is using LJ series zero sequence electricity
Flow sensor, inverse-impedance type thyristor use KK1-2 high speed thyristor, and bidirectional thyristor uses SB system using BCR series, diode
Column Schottky diode etc..
Main circuit parameter matching relationship in the present invention is as follows:
If: UgTHFor the gate trigger voltage threshold value (unit: V) of inverse-impedance type thyristor, residual current sensor is leaked hunting
Electric current and output electric current are I respectively0、I2(unit: A), the electric current ratio of residual current sensor are ki=I2/I0, enable: I0mIt is fair
Perhaps tested leakage current I0Maximum value (unit: A), then:
R15> > R14 (1)
R in formula14、R15、R16Respectively transfer resistance R14, filter resistance R15, divider resistance R16 resistance value (unit:
Ω)。
The course of work of the present invention is as follows:
(1) light is acted on every formula three-phase alternating current TRIAC driving circuit: circuit of the present invention has the function of Phototube Coupling, optocoupler IC1
Light emitting control side be voltage control circuit.The anode of the positive driving end IN+ termination driving voltage of the circuit, bears driving end IN-
The negative terminal of driving voltage is terminated, and carries out the resistance value of configuration current-limiting resistance R1 according to the rated current of optocoupler emission side.Generally answer
In, can also the supply voltage end of positive driving end IN+ termination higher level's control circuit be born the driving end end IN- and be controlled as higher level
The switch control terminal of circuit, then three optocouplers are all connected when the control terminal is low level, and then make three bidirectional thyristor conductings
Give three-phase alternating current load supplying；Three optocouplers are turned off when the control terminal is high level, and then turn off three bidirectional thyristors,
Three-phase alternating current load power down.
(2) three-phase electric leakage monitoring and protection effect: in circuit of the present invention, using residual current sensor SC1 real-time monitoring three
Leakage current in phase AC load circuit, once discovery leakage current reaches I0m, then formula (1), formula (2) circuit parameter cooperation with
And with left forward diode D1, left negative sense diode D2, right forward diode D3, right negative sense diode D4, transfer resistance
Under the effects of R14, filter resistance R15, divider resistance R16, rectification based on filter capacitor C7, filtering, bleeder circuit, make reverse blocking
Thyristor VT1 conducting, and then it is turned off A phase bidirectional thyristor VT2, B phase bidirectional thyristor VT3, C phase bidirectional thyristor VT4,
And after turning off before no progress power-off restarting work, the two-way crystalline substance of A phase bidirectional thyristor VT2, B phase bidirectional thyristor VT3, C phase
Brake tube VT4 remains shutdown, to play safe and reliable protection control action to the electric leakage of three-phase alternating current load circuit.
Claims (2)
1. one kind has earth leakage protective 3 phase AC solid relay circuit, including light drives electricity every formula three-phase alternating current TRIAC
Leak electricity telemetry circuit for road, three-phase, is characterized in that:
Light includes the two-way crystalline substance of A phase optocoupler IC1, B phase optocoupler IC2, C phase optocoupler IC3, A phase every formula three-phase alternating current TRIAC driving circuit
Brake tube VT2, B phase bidirectional thyristor VT3, C phase bidirectional thyristor VT4, A phase drives capacitor C1, A phase that capacitor C2, B phase is protected to drive
It is right that capacitor C3, B phase protects capacitor C4, C phase to drive capacitor C5, C phase that capacitor C6, current-limiting resistance R1, A is protected to fail to agree resistance R2, A phase
Resistance R3, A phase gate electrode resistance R4, A phase protective resistance R5, B fails to agree right resistance R7, B phase gate electrode resistance R8, B phase of resistance R6, B phase
Protective resistance R9, C fails to agree right resistance R11, C phase gate electrode resistance R12, C phase protective resistance R13, the A phase load of resistance R10, C phase
Load-A, B phase load Load-B, C phase load Load-C, positive that the end end IN+ is driven to connect with one end of current-limiting resistance R1, current limliting electricity
The other end of resistance R1 is connect with the anode of the anode of A phase optocoupler IC1 emission side, inverse-impedance type thyristor VT1, and A phase optocoupler IC1 shines
The cathode of side is connect with the anode of B phase optocoupler IC2 emission side, cathode and the C phase optocoupler IC3 emission side of B phase optocoupler IC2 emission side
Anode connection, the cathode of C phase optocoupler IC3 emission side and the cathode of inverse-impedance type thyristor VT1 negative drive the end end IN- to connect；
One end of A phase optocoupler IC1 outlet side is connect with the one end for failing to agree resistance R2 A, the other end and A of A phase optocoupler IC1 outlet side
The gate pole connection of one end, A phase bidirectional thyristor VT2 of phase gate electrode resistance R4, AC power source A phase hold the end A line to pass through remaining electricity
Electricity is protected with the 1st anode of A phase bidirectional thyristor VT2, one end of the right resistance R3 of A phase, A phase after the detection hole of flow sensor CS1
One end connection of R5 is hindered, the other end and the A of the right resistance R3 of A phase fails to agree the other end of resistance R2, A phase drives one end of capacitor C1 to connect
It connects, the 2nd anode and the other end of A phase gate electrode resistance R4, the A phase of A phase bidirectional thyristor VT2 drives the other end of capacitor C1, A phase
It is connect again with one end of A phase load Load-A after one end connection of protection capacitor C2, A phase protects the other end of capacitor C2 and A phase
The other end of protective resistance R5 connects, the other end of A phase load Load-A and one end, the C phase load of B phase load Load-B
It is connect again with AC power source zero line side N-terminal after the detection hole of residual current sensor CS1 after one end connection of Load-C；
One end of B phase optocoupler IC2 outlet side is connect with the one end for failing to agree resistance R6 B, the other end and B of B phase optocoupler IC2 outlet side
The gate pole connection of one end, B phase bidirectional thyristor VT2 of phase gate electrode resistance R8, AC power source B phase hold the end B line to pass through remaining electricity
Electricity is protected with the 1st anode of B phase bidirectional thyristor VT3, one end of the right resistance R7 of B phase, B phase after the detection hole of flow sensor CS1
One end connection of R9 is hindered, the other end and the B of the right resistance R7 of B phase fails to agree the other end of resistance R6, B phase drives one end of capacitor C3 to connect
It connects, the 2nd anode and the other end of B phase gate electrode resistance R8, the B phase of B phase bidirectional thyristor VT3 drives the other end of capacitor C3, B phase
It is connect again with the other end of B phase load Load-B after one end connection of protection capacitor C4, B phase protects the other end and B of capacitor C4
The other end of phase protective resistance R9 connects；
One end of C phase optocoupler IC3 outlet side is connect with the one end for failing to agree resistance R10 C, the other end of C phase optocoupler IC3 outlet side with
The gate pole connection of one end, C phase bidirectional thyristor VT4 of C phase gate electrode resistance R12, AC power source C phase hold C-terminal line to pass through residue
It is protected after the detection hole of current sensor CS1 with the 1st anode of C phase bidirectional thyristor VT4, one end of the right resistance R11 of C phase, C phase
One end of resistance R13 connects, and the other end and the C of the right resistance R11 of C phase fail to agree the other end of resistance R10, C phase drives capacitor C5's
One end connection, the 2nd anode and the other end of C phase gate electrode resistance R12, the C phase of C phase bidirectional thyristor VT4 drive that capacitor C5's is another
One end, C phase are connect with the other end of C phase load Load-C again after protecting one end of capacitor C6 to connect, and C phase protects that capacitor C6's is another
One end is connect with the other end of C phase protective resistance R13；
Three-phase electric leakage telemetry circuit includes inverse-impedance type thyristor VT1, residual current sensor SC1, left forward diode D1, left negative
To diode D2, right forward diode D3, right negative sense diode D4, transfer resistance R14, filter resistance R15, divider resistance R16,
The 1st end output end I1 of filter capacitor C7, residual current sensor SC1 and anode, two pole of left negative sense of left forward diode D1
The cathode of pipe D2 connects, the 2nd end output end I2 of residual current sensor SC1 and anode, the right negative sense of right forward diode D3
The cathode of diode D4 connects, and the one of the cathode of the cathode of left forward diode D1 and right forward diode D3, transfer resistance R14
One end of one end connection at end, filter resistance R15, the other end of filter resistance R15 and divider resistance R16, filter capacitor C7
The gate pole connection of one end, inverse-impedance type thyristor VT1, the anode of left negative sense diode D2 and right negative sense diode D4, transfer resistance
The other end of R14, the other end of filter capacitor C7, the other end of divider resistance R16, the connection of the negative driving end end IN-.
2. according to claim 1 a kind of with earth leakage protective three-phase alternating current solid-state relay circuit, it is characterised in that
Circuit parameter matching relationship is as follows:
If: UgTHFor the gate trigger voltage threshold value of inverse-impedance type thyristor, the tested leakage current and output electricity of residual current sensor
Stream is I respectively0、I2, the electric current ratio of residual current sensor is ki=I2/I0, enable: I0mFor the tested leakage current I of permission0Maximum
Value, then:
R15> > R14 (1)
R in formula14、R15、R16The respectively resistance value of transfer resistance R14, filter resistance R15, divider resistance R16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811444608.8A CN109672431B (en) | 2018-11-29 | 2018-11-29 | Three-phase alternating current solid-state relay circuit with leakage protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811444608.8A CN109672431B (en) | 2018-11-29 | 2018-11-29 | Three-phase alternating current solid-state relay circuit with leakage protection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109672431A true CN109672431A (en) | 2019-04-23 |
| CN109672431B CN109672431B (en) | 2022-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811444608.8A Active CN109672431B (en) | 2018-11-29 | 2018-11-29 | Three-phase alternating current solid-state relay circuit with leakage protection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113820625A (en) * | 2021-10-13 | 2021-12-21 | 上海电气泰雷兹交通自动化***有限公司 | Circuit for detecting leakage current of alternating current solid-state relay |
| WO2022096836A1 (en) * | 2020-11-09 | 2022-05-12 | Safran Electrical & Power | Devices for monitoring and protecting power circuits |
Citations (3)
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| CN103956708A (en) * | 2014-04-21 | 2014-07-30 | 杭州电子科技大学 | Overload measurement and control circuit for low-voltage direct current load |
| CN203775096U (en) * | 2014-01-26 | 2014-08-13 | 杭州电子科技大学 | DC motor driving and protecting circuit |
| CN205566256U (en) * | 2016-04-18 | 2016-09-07 | 象山艾尔沃特智能科技有限公司 | Alternating load isolation control circuit |
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| CN203775096U (en) * | 2014-01-26 | 2014-08-13 | 杭州电子科技大学 | DC motor driving and protecting circuit |
| CN103956708A (en) * | 2014-04-21 | 2014-07-30 | 杭州电子科技大学 | Overload measurement and control circuit for low-voltage direct current load |
| CN205566256U (en) * | 2016-04-18 | 2016-09-07 | 象山艾尔沃特智能科技有限公司 | Alternating load isolation control circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022096836A1 (en) * | 2020-11-09 | 2022-05-12 | Safran Electrical & Power | Devices for monitoring and protecting power circuits |
| FR3116124A1 (en) * | 2020-11-09 | 2022-05-13 | Safran Electrical & Power | POWER CIRCUIT MONITORING AND PROTECTION DEVICES |
| CN113820625A (en) * | 2021-10-13 | 2021-12-21 | 上海电气泰雷兹交通自动化***有限公司 | Circuit for detecting leakage current of alternating current solid-state relay |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109672431B (en) | 2022-11-15 |
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