CN205389098U - Residual current operated circuit breaker circuit - Google Patents
Residual current operated circuit breaker circuit Download PDFInfo
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- CN205389098U CN205389098U CN201620006414.XU CN201620006414U CN205389098U CN 205389098 U CN205389098 U CN 205389098U CN 201620006414 U CN201620006414 U CN 201620006414U CN 205389098 U CN205389098 U CN 205389098U
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Abstract
The utility model discloses residual current operated circuit breaker circuit, including power supply circuit, electric leakage signal acquisition control circuit, trip circuit and test circuit, power supply circuit's input is connected with power L congruence power N respectively, and power supply circuit's output and electric leakage signal acquisition control circuit and trip circuit are connected, and for it provides working power supply, electric leakage signal acquisition control circuit's output is connected with trip circuit, to trip circuit output trip signal, electric leakage signal acquisition control circuit includes zero sequence transformer TA, and through the residual current of zero sequence transformer TA monitoring main circuit, when detecting residual current, electric leakage signal acquisition control circuit control trip circuit carries out the dropout action of circuit breaker, and the control circuit 1 of the dropout of electric leakage signal acquisition control circuit output closes after the delay time, make circuit breaker inlet wire end with termination inverse time circuit board appears and also can not burn out.
Description
Technical field
This utility model relates to Low Voltage Electrical Apparatus, particularly to a kind of residual current action breaker circuit.
Background technology
The electric sub-member plate of current electronic type residual current circuit breaker is substantially all connected on the leading-out terminal of chopper, under normal wiring (upper incoming line) condition, when pressing test button, ZCT sensing residual current, electric sub-member plate drives electrical apparatus release to make circuit breaker trip, now electric sub-member plate power-off simultaneously.If under error connection (lower inlet wire) condition, when pressing test button, circuit breaker trip, now electric sub-member plate does not have power-off, continues to drive tripping coil, until the electric sub-member plate parts damages such as tripping coil, controllable silicon, cause product failure so that client causes damage.
Summary of the invention
The purpose of this utility model is in that to overcome the defect of prior art, it is provided that a kind of performance safety is stable, and cost is low, and output controls the application circuit that can turn off.
For achieving the above object, this utility model adopts the technical scheme that
A kind of residual current action breaker circuit, including power circuit, electric leakage signal acquisition control circuit, trip circuit and test circuit, the input of described power circuit is connected with power supply L phase and power supply N respectively, and the outfan of power circuit is connected with electric leakage signal acquisition control circuit and trip circuit, provides working power for it, the outfan of electric leakage signal acquisition control circuit is connected with trip circuit, exports trip signal to trip circuit；Electric leakage signal acquisition control circuit includes ZCT TA, the residual current of main circuit is monitored by ZCT TA, when residual current being detected, electric leakage signal acquisition control circuit controls trip circuit and performs the trip action of chopper, the control signal of the dropout of electric leakage signal acquisition control circuit output is closed after delay time terminates, and makes in chopper end of incoming cables and termination inverse time wiring board occurs without burning；Described chopper includes end of incoming cables and leading-out terminal, end of incoming cables includes the inlet wire L1 side and the inlet wire N1 side that are respectively used to power supply L phase and power supply N phase connection, leading-out terminal includes the outlet L side and the outlet N side that are respectively used to power supply L phase and power supply N phase connection, and the wiring board of chopper is connected between outlet L side and outlet N side for power taking；When normal wiring, power supply L phase line and power supply N phase line are from end of incoming cables inlet wire, from leading-out terminal outlet, when electric leakage signal acquisition control circuit detects residual current, electric leakage signal acquisition control circuit controls trip circuit and performs the trip action of chopper, do not have voltage, wiring board not to have between outlet L side and outlet N side to burn；When chopper end of incoming cables and appearance termination inverse time, power supply L phase line and power supply N phase line are from leading-out terminal inlet wire, from end of incoming cables outlet, when electric leakage signal acquisition control circuit detects residual current, electric leakage signal acquisition control circuit controls trip circuit and performs the trip action of chopper, still has voltage between outlet L side and outlet N side, and the control signal of electric leakage signal acquisition control circuit output is closed after delay time terminates, trip circuit is not turned on, and wiring board will not burn.
nullFurther，Described electric leakage signal acquisition control circuit includes control chip、Bilateral diode D1、Debugging resistance R1、Resistance R2、Resistance R3、Electric capacity C1、Electric capacity C2、Electric capacity C3、Electric capacity C4，Resistance R2 and resistance R3 is connected in series between the two ends of the secondary coil of ZCT and the first pin of control chip and the second pin respectively，Bilateral diode D1 and debugging resistance R1 is connected in resistance R2 and the side of resistance R3 successively in parallel，Electric capacity C1 is connected in resistance R2 and the opposite side of resistance R3 in parallel，The two ends of electric capacity C2 are connected in parallel between the three-prong of control chip and the 5th pin respectively，The two ends of electric capacity C3 are connected in parallel between the three-prong of control chip and the 6th pin respectively，The two ends of electric capacity C4 are connected in parallel between the three-prong of control chip and the 7th pin respectively，7th pin of control chip is connected output control signal with trip circuit，When residual current being detected，The control signal of control chip output is closed after delay time terminates.
Further, described power circuit includes rectification circuit and reduction voltage circuit, the input of rectification circuit is connected with power supply L phase and power supply N respectively, and the outfan of rectification circuit is connected with the input of reduction voltage circuit, and the outfan of reduction voltage circuit is connected with the control chip of electric leakage signal acquisition control circuit；Power circuit also includes surge absorbing circuit, and surge absorbing circuit includes varistor RV1, and the two ends of varistor RV1 are connected with power supply L phase and power supply N respectively.
Further, described rectification circuit is half-wave rectifying circuit, and including diode VD1, the positive pole of diode VD1 is connected with power supply L, and the negative pole of diode VD1 is connected with the input of reduction voltage circuit.
Further, described reduction voltage circuit includes paster type resistor module and the electric capacity C5 of multiple paster type resistor composition, one end of paster type resistor module is connected with the outfan of rectification circuit, and the other end of paster type resistor module is connected with the 8th pin of the control chip of electric leakage signal acquisition control circuit；One end of electric capacity C5 is connected with the other end of paster type resistor module, other end ground connection.
Further, described paster type resistor module is formed by multiple Chip-R tandem compounds；Or, paster type resistor module is formed by least two series patch resistor group parallel combination, and wherein each series patch resistor group is formed by multiple Chip-R tandem compounds；Or, paster type resistor module is formed by least two parallel connection Chip-R group tandem compound, and wherein each Chip-R group in parallel is formed by multiple Chip-R parallel combinations.
Further, described trip circuit includes tripping coil KA, controllable silicon VT1；The anode of controllable silicon VT1 is connected with power supply L, the minus earth pole of controllable silicon VT1, and the G pole of controllable silicon VT1 is connected with the 7th pin of control chip.
Further, described tripping coil KA is connected in series between power circuit with power supply L phase, or tripping coil KA is connected in series between power circuit with power supply N phase, or tripping coil KA is connected in series between power circuit and controllable silicon VT1.
Further, without connecting electric capacity between described control chip the first pin and the second pin, without being connected resistance between control chip the first pin or the second pin with ZCT secondary side, 4th pin of control chip is directly grounded or does not connect, the 7th no ground electric capacity of foot of control chip, ZCT secondary side is without bilateral diode in parallel.
Further, described leakage tests loop includes normally opened test switch S1 and resistance R4, and this normally opened test switch S1 and resistance R4 series connection forms loop, and this loop is through ZCT TA and is connected in parallel the live wire phase L-L1 of main circuit and neutral conductor phase N-N1.
The dropout control signal of the electric leakage signal acquisition control circuit output of this utility model residual current action breaker circuit is automatically switched off after time delay certain time so that can normally thread off inverse time with appearance termination in chopper end of incoming cables and wiring board will not burn；When normal wiring, power supply L phase line and power supply N phase line are from end of incoming cables inlet wire, from leading-out terminal outlet, wiring board is connected between outlet L side and outlet N side for power taking, when electric leakage signal acquisition control circuit detects residual current, electric leakage signal acquisition control circuit controls trip circuit and performs the trip action of chopper, does not have voltage between outlet L side and outlet N side, even if there is residual current, wiring board is without occurring burning；When chopper end of incoming cables and appearance termination inverse time, power supply L phase line and power supply N phase line are from leading-out terminal inlet wire, from end of incoming cables outlet, wiring board is connected between outlet L side and outlet N side for power taking, when electric leakage signal acquisition control circuit detects residual current, electric leakage signal acquisition control circuit controls trip circuit and performs the trip action of chopper, voltage is still had between outlet L side and outlet N side, the control signal of electric leakage signal acquisition control circuit output is closed after delay time terminates, simultaneously residual current is withdrawn with switching off, trip circuit is not turned on, chopper can normally be threaded off and wiring board will not burn.Power circuit also includes surge absorbing circuit to carry out surge absoption circuit is carried out surge protection.Paster type resistor module has various embodiments, and paster type resistor module is formed by multiple Chip-R tandem compounds；Or, paster type resistor module is formed by least two series patch resistor group parallel combination, and wherein each series patch resistor group is formed by multiple Chip-R tandem compounds；Or, paster type resistor module is formed by least two parallel connection Chip-R group tandem compound, and wherein each Chip-R group in parallel is formed by multiple Chip-R parallel combinations.There is various embodiments the position that arranges of tripping coil, tripping coil KA is connected in series between power circuit with power supply L phase, or tripping coil KA is connected in series between power circuit with power supply N phase, or tripping coil KA is connected in series between power circuit and controllable silicon VT1.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of this utility model residual current action breaker circuit；
Fig. 2 is the first embodiment circuit diagram of this utility model residual current action breaker circuit；
Fig. 3 is the second embodiment circuit diagram of this utility model residual current action breaker circuit；
Fig. 4 is the third embodiment circuit diagram of this utility model residual current action breaker circuit；
Fig. 5 is the first embodiment circuit diagram of this utility model paster type resistor module；
Fig. 6 is the second embodiment circuit diagram of this utility model paster type resistor module；
Fig. 7 is the third embodiment circuit diagram of this utility model sheet paster type resistor module.
Detailed description of the invention
Below in conjunction with the embodiment that accompanying drawing 1 to 7 provides, further illustrate the detailed description of the invention of residual current action breaker circuit of the present utility model.Residual current action breaker circuit of the present utility model is not limited to the following description.
As it is shown in figure 1, this utility model breaker circuit includes power circuit, trip circuit, leakage tests circuit and electric leakage signal acquisition control circuit.Power circuit includes surge absorbing circuit, rectification circuit and reduction voltage circuit.The input of described power circuit is connected with power supply L pole and power supply N pole respectively, and power circuit takes alternating current from power supply L pole and power supply N pole；The outfan of power circuit is connected with electric leakage signal acquisition control circuit and trip circuit, provides working power for it；The outfan of electrical signal collection control circuit is connected with trip circuit, and electric leakage signal acquisition control circuit is used for detecting whether main circuit residual current occurs, and controls trip circuit execution trip action when there is residual current；Trip circuit is used for driving tripping coil KA (performer) to produce trip action, and it is by the control of electric leakage signal acquisition control circuit；Leakage tests circuit is used for producing simulation residual current, and whether the trip action to detect residual current action breaker is effective.
As shown in Figure 1, this utility model residual current action breaker circuit, including power circuit, electric leakage signal acquisition control circuit, trip circuit and test circuit, the input of described power circuit is connected with power supply L phase and power supply N respectively, the outfan of power circuit is connected with electric leakage signal acquisition control circuit and trip circuit, thering is provided working power for it, the outfan of electric leakage signal acquisition control circuit is connected with trip circuit, exports trip signal to trip circuit；Electric leakage signal acquisition control circuit includes ZCT TA, the residual current of main circuit is monitored by ZCT TA, when residual current being detected, electric leakage signal acquisition control circuit controls trip circuit and performs the trip action of chopper, the control signal of the dropout of electric leakage signal acquisition control circuit output is closed after delay time terminates, and makes in chopper end of incoming cables and termination inverse time wiring board occurs without burning；Described chopper includes end of incoming cables and leading-out terminal, and end of incoming cables includes the inlet wire L1 side and the inlet wire N1 side that are respectively used to power supply L phase and power supply N phase connection, and leading-out terminal includes the outlet L side and the outlet N side that are respectively used to power supply L phase and power supply N phase connection；When normal wiring, power supply L phase line and power supply N phase line are from end of incoming cables inlet wire, from leading-out terminal outlet, wiring board is connected between outlet L side and outlet N side for power taking, when electric leakage signal acquisition control circuit detects residual current, electric leakage signal acquisition control circuit controls trip circuit and performs the trip action of chopper, does not have voltage between outlet L side and outlet N side, even if there is residual current, wiring board is without occurring burning；When chopper end of incoming cables and appearance termination inverse time, power supply L phase line and power supply N phase line are from leading-out terminal inlet wire, from end of incoming cables outlet, wiring board is connected between outlet L side and outlet N side for power taking, when electric leakage signal acquisition control circuit detects residual current, electric leakage signal acquisition control circuit controls trip circuit and performs the trip action of chopper, voltage is still had between outlet L side and outlet N side, the control signal of electric leakage signal acquisition control circuit output is closed after delay time terminates, simultaneously residual current is withdrawn with switching off, trip circuit is not turned on, wiring board will not burn.The dropout control signal of the electric leakage signal acquisition control circuit output of this utility model residual current action breaker circuit is automatically switched off after time delay certain time so that can normally thread off inverse time with appearance termination in chopper end of incoming cables and wiring board will not burn.
nullAs in Figure 2-4，Electric leakage signal acquisition control circuit includes control chip、Bilateral diode D1、Debugging resistance R1、Resistance R2、Resistance R3、Electric capacity C1、Electric capacity C2、Electric capacity C3、Electric capacity C4，Resistance R2 and resistance R3 is connected in series between the two ends of the secondary coil of ZCT and the first pin of control chip and the second pin respectively，Bilateral diode D1 and debugging resistance R1 is connected in resistance R2 and the side of resistance R3 successively in parallel，Electric capacity C1 is connected in resistance R2 and the opposite side of resistance R3 in parallel，The two ends of electric capacity C2 are connected in parallel between the three-prong of control chip and the 5th pin respectively，The two ends of electric capacity C3 are connected in parallel between the three-prong of control chip and the 6th pin respectively，The two ends of electric capacity C4 are connected in parallel between the three-prong of control chip and the 7th pin respectively，7th pin of control chip is connected output control signal with trip circuit，When residual current being detected，The control signal of control chip output is closed after delay time terminates.When chopper end of incoming cables and appearance termination inverse time, when control chip is when residual current being detected, control chip controls trip circuit and performs the trip action of chopper, voltage is still had between outlet L side and outlet N side, the control signal of control chip output is closed after delay time terminates, simultaneously residual current switches off with normally opened test and withdraws so that trip circuit is not turned on, and chopper can normally be threaded off and wiring board will not burn.This utility model can also realize closing after control signal delay time terminates by electronic component or alternate manner.
Specifically, without connecting electric capacity between described control chip the first pin and the second pin, without being connected resistance between control chip the first pin or the second pin with ZCT secondary side, 4th pin of control chip is directly grounded or does not connect, the 7th no ground electric capacity of foot of control chip, ZCT secondary side is without bilateral diode in parallel.Making electric leakage signal acquisition control circuit simpler, cost is low, it is simple to the miniaturization of electric leakage signal acquisition control circuit and chopper.
As Figure 1-4, power circuit includes rectification circuit and reduction voltage circuit, the input of rectification circuit is connected with power supply L phase and power supply N respectively, and the outfan of rectification circuit is connected with the input of reduction voltage circuit, and the outfan of reduction voltage circuit is connected with the control chip of electric leakage signal acquisition control circuit；Power circuit also includes surge absorbing circuit, and surge absorbing circuit includes varistor RV1, and the two ends of varistor RV1 are connected with power supply L phase and power supply N respectively.For surge absoption, circuit is carried out surge protection.
Specifically, described rectification circuit is half-wave rectifying circuit, and including diode VD1, the positive pole of diode VD1 is connected with power supply L, and the negative pole of diode VD1 is connected with the input of reduction voltage circuit.Rectification circuit can also be all wave rectification, but adopts halfwave rectifier lower in cost, and circuit more simplifies, and is conducive to the miniaturization of circuit.Described reduction voltage circuit includes paster type resistor module and the electric capacity C5 of multiple paster type resistor composition, one end of paster type resistor module is connected with the outfan of rectification circuit, and the other end of paster type resistor module is connected with the 8th pin of the control chip of electric leakage signal acquisition control circuit；One end of electric capacity C5 is connected with the other end of paster type resistor module, other end ground connection.
Specifically, described paster type resistor module is formed by multiple Chip-R tandem compounds.Fig. 5 provides the first embodiment of paster type resistor module, is amounted to eight resistant series formed by resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12.
Paster type resistor module is formed by least two parallel connection Chip-R group tandem compound, and wherein each Chip-R group in parallel is formed by multiple Chip-R parallel combinations.Fig. 6 provides the second embodiment of paster type resistor module, resistance R5 and resistance R6, resistance R7 and resistance R8, resistance R9 and resistance R10, resistance R11 and resistance R12 four Chip-R groups in parallel of formation in parallel respectively, four Chip-R group in parallel series connection form paster type resistor module.
Paster type resistor module is formed by least two series patch resistor group parallel combination, and wherein each series patch resistor group is formed by multiple Chip-R tandem compounds.Fig. 7 provides the third embodiment of paster type resistor module, the first Chip-R group is formed by resistance R5, resistance R7, resistance R9 and resistance R11 series connection, resistance R6, resistance R8, resistance R10 and resistance R12 series connection form the second Chip-R group, the first Chip-R group and the second Chip-R group parallel connection and form paster type resistor module.
As in Figure 2-4, described trip circuit includes tripping coil KA, controllable silicon VT1；The anode of controllable silicon VT1 is connected with power supply L, the minus earth pole of controllable silicon VT1, and the G pole of controllable silicon VT1 is connected with the 7th pin of control chip.When there being leakage current to produce, control chip IC1 collects signal and exports high level and turn on to the G pole of controllable silicon VT.After controllable silicon VT conducting, forming loop with the diode in rectifier bridge, tripping coil KA, tripping coil has big electric current to pass through, thus driving mechanism is threaded off.The G pole of controllable silicon VT1 controls lower trip circuit and has two states of turn-on and turn-off: at main circuit under normal circumstances, electric leakage signal acquisition control circuit controls controllable silicon VT1 and turns off (make on/off control loop and be off state), and the electric current being connected in series in the tripping coil KA in trip circuit can not encourage tripping coil to produce trip action；When there is residual current (leakage current) in main circuit, electric leakage signal acquisition control circuit controls controllable silicon VT1 conducting (triggering trip circuit conducting), the increase of the electric current being connected in series in the tripping coil KA in trip circuit, so that excitation tripping coil produces trip action.When chopper end of incoming cables and appearance termination inverse time, control chip is when residual current being detected, control chip controls trip circuit and performs the trip action of chopper, voltage is still had between outlet L side and outlet N side, the control signal of control chip output is closed after delay time terminates, and controllable silicon VT1 closes when voltage zero-cross, and residual current disconnects with normally opened test switch S1 and withdraws simultaneously, trip circuit is not turned on, and chopper can normally be threaded off and wiring board will not burn.
Specifically, tripping coil KA arranges position and can have various embodiments, described tripping coil KA is connected in series between power circuit with power supply L phase (with reference to Fig. 2), or tripping coil KA is connected in series between power circuit with power supply N phase (with reference to Fig. 3), or tripping coil KA is connected in series between power circuit and controllable silicon VT1 (with reference to Fig. 4).
As in Figure 2-4, described leakage tests loop includes normally opened test switch S1 and resistance R4, this normally opened test switch S1 and resistance R4 series connection forms loop, and this loop is through ZCT TA and is connected in parallel the live wire phase L-L1 of main circuit and neutral conductor phase N-N1.
When artificially pressing test switch S1 and making test loop turn on; the electric current flow through in test loop plays the effect of simulation residual current; make the secondary circuit of ZCT TA can induce residual current signal; this signal can trigger tripping coil KA and produce trip action, thus whether the dropout protection detecting chopper is normal.
Below in conjunction with Fig. 2 to Fig. 4 embodiment provided, further illustrate the control process of dropout defencive function of the present utility model.
Electric leakage dropout protection process: when residual current occurs in main circuit; the secondary circuit of ZCT TA can induce electric leakage signal; this electric leakage signal makes the pressure reduction between first pin of control chip IC1 and the second pin raise; the 7th pin output high level making control chip IC1 triggers controllable silicon VT1 anode and negative electrode conducting to the G pole of controllable silicon VT1, causes tripping coil KA to produce trip action.
When normal wiring, that is: between electric power incoming line termination power supply L1 phase and power supply N1 phase, wiring board is connected between power supply L phase and power supply N phase for power taking, if now there being electric leakage to be detected, the 7th pin output signal of monitoring chip makes controllable silicon VT1 turn on, and control chip controls trip circuit and performs the trip action of chopper, switch K1 and switch K2 is threaded off, not having voltage between power supply L phase and power supply N phase, even if there is residual current, wiring board is without occurring burning；
When false wiring (lower inlet wire), namely, chopper end of incoming cables and appearance termination inverse time, electric power incoming line termination power supply L phase and power supply N phase, wiring board is connected between power supply L phase and power supply N phase for power taking, if now there being electric leakage to be detected, 7th pin output signal of monitoring chip makes controllable silicon VT1 turn on, control chip controls trip circuit and performs the trip action of chopper, switch K1 and switch K2 is threaded off, power supply L phase still has voltage with power supply N phase, the control signal of control chip the 7th pin output is closed after delay time terminates, controllable silicon VT1 closes when voltage zero-cross, trip circuit is not turned on, still can normally thread off thus realizing error connection and prevent burning of electronic building brick.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, it is impossible to assert that of the present utility model being embodied as is confined to these explanations.For this utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, it is also possible to make some simple deduction or replace, protection domain of the present utility model all should be considered as belonging to.
Claims (10)
1. a residual current action breaker circuit, including power circuit, electric leakage signal acquisition control circuit, trip circuit and test circuit, it is characterized in that: the input of described power circuit is connected with power supply L phase and power supply N respectively, and the outfan of power circuit is connected with electric leakage signal acquisition control circuit and trip circuit, provide working power for it, the outfan of electric leakage signal acquisition control circuit is connected with trip circuit, exports trip signal to trip circuit；Electric leakage signal acquisition control circuit includes ZCT TA, the residual current of main circuit is monitored by ZCT TA, when residual current being detected, electric leakage signal acquisition control circuit controls trip circuit and performs the trip action of chopper, the control signal of the dropout of electric leakage signal acquisition control circuit output is closed after delay time terminates, and makes in chopper end of incoming cables and termination inverse time wiring board occurs without burning；
Described chopper includes end of incoming cables and leading-out terminal, end of incoming cables includes the inlet wire L1 side and the inlet wire N1 side that are respectively used to power supply L phase and power supply N phase connection, leading-out terminal includes the outlet L side and the outlet N side that are respectively used to power supply L phase and power supply N phase connection, and the wiring board of chopper is connected between outlet L side and outlet N side for power taking；
When normal wiring, power supply L phase line and power supply N phase line are from end of incoming cables inlet wire, from leading-out terminal outlet, when electric leakage signal acquisition control circuit detects residual current, electric leakage signal acquisition control circuit controls trip circuit and performs the trip action of chopper, do not have voltage, wiring board not to have between outlet L side and outlet N side to burn；
When chopper end of incoming cables and appearance termination inverse time, power supply L phase line and power supply N phase line are from leading-out terminal inlet wire, from end of incoming cables outlet, when electric leakage signal acquisition control circuit detects residual current, electric leakage signal acquisition control circuit controls trip circuit and performs the trip action of chopper, still has voltage between outlet L side and outlet N side, and the control signal of electric leakage signal acquisition control circuit output is closed after delay time terminates, trip circuit is not turned on, and wiring board will not burn.
null2. residual current action breaker circuit according to claim 1，It is characterized in that: described electric leakage signal acquisition control circuit includes control chip、Bilateral diode D1、Debugging resistance R1、Resistance R2、Resistance R3、Electric capacity C1、Electric capacity C2、Electric capacity C3、Electric capacity C4，Resistance R2 and resistance R3 is connected in series between the two ends of the secondary coil of ZCT and the first pin of control chip and the second pin respectively，Bilateral diode D1 and debugging resistance R1 is connected in resistance R2 and the side of resistance R3 successively in parallel，Electric capacity C1 is connected in resistance R2 and the opposite side of resistance R3 in parallel，The two ends of electric capacity C2 are connected in parallel between the three-prong of control chip and the 5th pin respectively，The two ends of electric capacity C3 are connected in parallel between the three-prong of control chip and the 6th pin respectively，The two ends of electric capacity C4 are connected in parallel between the three-prong of control chip and the 7th pin respectively，7th pin of control chip is connected output control signal with trip circuit，When residual current being detected，The control signal of control chip output is closed after delay time terminates.
3. residual current action breaker circuit according to claim 2, it is characterized in that: described power circuit includes rectification circuit and reduction voltage circuit, the input of rectification circuit is connected with power supply L phase and power supply N respectively, the outfan of rectification circuit is connected with the input of reduction voltage circuit, and the outfan of reduction voltage circuit is connected with the control chip of electric leakage signal acquisition control circuit；Power circuit also includes surge absorbing circuit, and surge absorbing circuit includes varistor RV1, and the two ends of varistor RV1 are connected with power supply L phase and power supply N respectively.
4. residual current action breaker circuit according to claim 3, it is characterized in that: described rectification circuit is half-wave rectifying circuit, including diode VD1, the positive pole of diode VD1 is connected with power supply L, and the negative pole of diode VD1 is connected with the input of reduction voltage circuit.
5. residual current action breaker circuit according to claim 3, it is characterized in that: described reduction voltage circuit includes paster type resistor module and the electric capacity C5 of multiple paster type resistor composition, one end of paster type resistor module is connected with the outfan of rectification circuit, and the other end of paster type resistor module is connected with the 8th pin of the control chip of electric leakage signal acquisition control circuit；One end of electric capacity C5 is connected with the other end of paster type resistor module, other end ground connection.
6. residual current action breaker circuit according to claim 5, it is characterised in that: described paster type resistor module is formed by multiple Chip-R tandem compounds；Or, paster type resistor module is formed by least two series patch resistor group parallel combination, and wherein each series patch resistor group is formed by multiple Chip-R tandem compounds；Or, paster type resistor module is formed by least two parallel connection Chip-R group tandem compound, and wherein each Chip-R group in parallel is formed by multiple Chip-R parallel combinations.
7. residual current action breaker circuit according to claim 2, it is characterised in that: described trip circuit includes tripping coil KA, controllable silicon VT1；The anode of controllable silicon VT1 is connected with power supply L, the minus earth pole of controllable silicon VT1, and the G pole of controllable silicon VT1 is connected with the 7th pin of control chip.
8. residual current action breaker circuit according to claim 6, it is characterized in that: described tripping coil KA is connected in series between power circuit with power supply L phase, or tripping coil KA is connected in series between power circuit with power supply N phase, or tripping coil KA is connected in series between power circuit and controllable silicon VT1.
9. residual current action breaker circuit according to claim 2, it is characterized in that: without connecting electric capacity between described control chip the first pin and the second pin, without being connected resistance between control chip the first pin or the second pin with ZCT secondary side, 4th pin of control chip is directly grounded or does not connect, the 7th no ground electric capacity of foot of control chip, ZCT secondary side is without bilateral diode in parallel.
10. residual current action breaker circuit according to claim 1 and 2, it is characterized in that: described leakage tests loop includes normally opened test switch S1 and resistance R4, this normally opened test switch S1 and resistance R4 series connection forms loop, and this loop is through ZCT TA and is connected in parallel the live wire phase L-L1 of main circuit and neutral conductor phase N-N1.
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| CN201620006414.XU CN205389098U (en) | 2016-01-04 | 2016-01-04 | Residual current operated circuit breaker circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111293669A (en) * | 2018-12-07 | 2020-06-16 | 格述电子技术(上海)有限公司 | Novel low-power-consumption leakage protector |
| 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 |
| CN113162009A (en) * | 2020-01-07 | 2021-07-23 | 华为技术有限公司 | Over-energy protection circuit, residual current device, electronic equipment and distribution box |
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2016
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111293669A (en) * | 2018-12-07 | 2020-06-16 | 格述电子技术(上海)有限公司 | Novel low-power-consumption leakage protector |
| CN111293669B (en) * | 2018-12-07 | 2022-06-21 | 格述电子技术(上海)有限公司 | Novel low-power-consumption leakage protector |
| CN113162009A (en) * | 2020-01-07 | 2021-07-23 | 华为技术有限公司 | Over-energy protection circuit, residual current device, electronic equipment and distribution box |
| 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 |
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