CN102931034B - Rccb - Google Patents
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- CN102931034B CN102931034B CN201210262480.XA CN201210262480A CN102931034B CN 102931034 B CN102931034 B CN 102931034B CN 201210262480 A CN201210262480 A CN 201210262480A CN 102931034 B CN102931034 B CN 102931034B
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- 230000005611 electricity Effects 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 7
- 230000009466 transformation Effects 0.000 claims description 5
- 230000006641 stabilisation Effects 0.000 claims description 4
- 238000011105 stabilization Methods 0.000 claims description 4
- 239000003381 stabilizer Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/42—Induction-motor, induced-current, or electrodynamic release mechanisms
- H01H71/43—Electrodynamic release mechanisms
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/34—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/66—Power reset mechanisms
- H01H71/70—Power reset mechanisms actuated by electric motor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Breakers (AREA)
Abstract
The present invention relates to a kind of RCCB, it comprises: housing and electronic conduction mechanism, and this electronic conduction mechanism comprises stepper motor, eccentric wheel and drive link; Control circuit comprises: central control unit, sensor for detecting electric leakage, dropout drive circuit and stepper motor. Have sudden change leakage current when central control unit records in A phase, B phase or C phase power supply, and this sudden change leakage current is while being greater than the first preset value, central control unit carries out through dropout drive circuit control electrical apparatus release the action of threading off, to cut off the electricity supply; After 20-60 second, central control unit is through drive circuit control step electric machine rotation, and stepper motor drives the operating grip action of electrical apparatus release through eccentric wheel and drive link, and makes electrical apparatus release carry out feed motion to switch on power; Have gradual leakage current when recording in A phase, B phase or C phase power supply, and this electric current is while being greater than the second preset value, central control unit control electrical apparatus release is carried out the action of threading off, to cut off the electricity supply.
Description
Technical field
The present invention relates to a kind of RCCB.
Background technology
Chinese patent literature notification number CN200941549Y discloses a kind of small motor protector; transformer converts the current signal of motor major loop to small-signal current; after signaling conversion circuit and signal conditioning circuit, deliver to single-chip microcomputer; single-chip microcomputer is to its sampling of leaking electricity, three-phase current sampling; and judge whether successively electric leakage, phase shortage, short circuit, stall, three-phase imbalance, overload; and then show by display driver circuit driving LED display module, and cut off the input power of motor by output control circuit. Openly also a kind of RCCB of Chinese patent literature publication number CN1622414A.
Above-mentioned the deficiencies in the prior art part is: cannot, according to situation automatic trip and the automatic closing of the gradual leakage current in power supply circuits and sudden change leakage current, bring inconvenience to use.
Chinese patent literature notification number CN2496166Y discloses a kind of earth leakage protective devices gradual and two adjusting devices of sudden change that have; variable (gradual with sudden change) the reference signal circuit being made up of with at least three resistance multidigit selector switch is connected with corresponding variable (gradual with suddenly change) comparator circuit, forms respectively the gradual and device that can regulate respectively that suddenlys change. The weak point of this scheme is: adopt analog circuit to realize monitoring gradual and sudden change leakage current, reliability is lower, and this scheme cannot realize in conjunction with situation gradual and sudden change leakage current the function of automatic trip and combined floodgate.
Chinese patent literature notification number CN2427915Y discloses a kind of monophase leakage protector, comprises executive circuit, leakaging signal detecting circuit, over-current signal testing circuit, gradual electric leakage signal output circuit, sudden change electric leakage signal output circuit, over-current signal integration output circuit, over-current signal amplification output circuit, automatic reset circuit, reset lockout circuit, test and a display circuit etc. It can automatic reclosing after earth leakage protective action once. The weak point of this scheme is: the monitoring that adopts analog circuit to realize gradual and sudden change leakage current is controlled with combined floodgate, is easily disturbed, and reliability is lower.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of RCCB that can realize according to the situation of the gradual leakage current in power supply circuits and sudden change leakage current automatic trip and automatic switching-in function.
For solving the problems of the technologies described above, RCCB of the present invention, comprise: inside is provided with the housing of electrical apparatus release and control circuit, housing is provided with for driving electrical apparatus release to carry out the electronic conduction mechanism of feed motion, this electronic conduction mechanism comprises stepper motor, eccentric wheel and drive link, and described eccentric wheel is arranged on the output shaft of stepper motor; Described electrical apparatus release comprises the joystick stretching out from housing, and one end and the eccentric wheel of drive link are rotationally connected, and the other end and operating grip strand connect;
Described control circuit comprises: central control unit, for detection of the sensor for detecting electric leakage of the leakage current of A phase, B phase and C phase power supply, the dropout drive circuit being connected with the dropout control signal output of central control unit, and stepper motor; Sensor for detecting electric leakage is connected with the detection of electrical leakage signal input part of central control unit through amplifying circuit, and the energization control signal output of central control unit is connected with the power end of stepper motor through drive circuit;
When central control unit records existence sudden change leakage current in A phase, B phase or C phase power supply by sensor for detecting electric leakage, and when this sudden change leakage current is greater than the first preset value, central control unit carries out through dropout drive circuit control electrical apparatus release the action of threading off, to cut off the electricity supply; After 20-60 second, central control unit is through drive circuit control step electric machine rotation, and stepper motor drives the operating grip action of electrical apparatus release through eccentric wheel and drive link, and makes electrical apparatus release carry out feed motion to switch on power;
When recording by sensor for detecting electric leakage in A phase, B phase or C phase power supply, central control unit there is gradual leakage current, and when this gradual leakage current is greater than the second preset value, central control unit carries out through dropout drive circuit control electrical apparatus release the action of threading off, to cut off the electricity supply; After 3-10 minute, central control unit is through drive circuit control step electric machine rotation, and stepper motor drives the operating grip action of electrical apparatus release through eccentric wheel and drive link, and makes electrical apparatus release carry out feed motion, to switch on power; If now gradual leakage current is still greater than the second preset value, central control unit carries out through dropout drive circuit control electrical apparatus release the action of threading off, to cut off the electricity supply.
Described control circuit also comprises: A phase, B phase and C phase current sensor; A phase, B phase and C phase current sensor are connected with the power supply test side of central control unit through current stabilization circuit; When central control unit records while there is overload current, short circuit current or phase shortage in A phase, B phase or C phase power supply by A phase, B phase and C phase current sensor, central control unit carries out through dropout drive circuit control electrical apparatus release the action of threading off, to cut off the electricity supply.
The present invention has positive effect: in (1) RCCB of the present invention, after electrical apparatus release is threaded off automatically, after the default time period, electronic conduction mechanism drives electrical apparatus release to automatically perform feed motion. In control circuit, central control unit detects the leakage current of A phase, B phase and C phase power supply through sensor for detecting electric leakage, to detect sudden change and gradual leakage current, and carry out according to the size control electrical apparatus release of sudden change and gradual leakage current the action of threading off, then make electrical apparatus release carry out feed motion to switch on power according to the default time interval by control step motor, thereby realize the action of automatic closing; In RCCB of the present invention, adopting Based Intelligent Control element is that central control unit completes Based Intelligent Control step, and with respect to traditional simulation control road, RCCB of the present invention is difficult for being disturbed the impact of signal, and reliability is better, and structure is simpler. (2) in control circuit of the present invention, central control unit records while there is overload current, short circuit current or phase shortage in A phase, B phase or C phase power supply by A phase, B phase and C phase current sensor, central control unit carries out through dropout drive circuit control electrical apparatus release the action of threading off, to cut off the electricity supply. It is that central control unit completes Based Intelligent Control step that RCCB of the present invention adopts Based Intelligent Control element, and with respect to traditional simulation control road, RCCB of the present invention is difficult for being disturbed the impact of signal, and reliability is better, and structure is simpler.
Brief description of the drawings
Fig. 1 is the structure chart of RCCB of the present invention;
Fig. 2 is the circuit block diagram of RCCB of the present invention;
Fig. 3 is the circuit theory diagrams of RCCB of the present invention.
Detailed description of the invention
(embodiment 1)
See Fig. 1, the RCCB of the present embodiment, comprise: inside is provided with the housing 2 of electrical apparatus release 10 and control circuit, housing 2 is provided with for driving electrical apparatus release 10 to carry out the electronic conduction mechanism 3 of feed motion, this electronic conduction mechanism 3 comprises stepper motor 31, eccentric wheel 32 and drive link 33, and described eccentric wheel 32 is arranged on the output shaft of stepper motor 31; Described electrical apparatus release 10 comprises the joystick 10-1 stretching out from housing 2, and one end of drive link 33 and eccentric wheel 32 are rotationally connected, and the other end and operating grip 10-1 strand connect.
See Fig. 2-3, described control circuit comprises: central control unit 1 (the single-chip microcomputer IC1 that model is PIC16F74), for detection of A phase, the sensor for detecting electric leakage T2 of the leakage current of B phase and C phase power supply, for the transformation regulator rectifier circuit 4 of dc source is provided, the dropout drive circuit 9 being connected with the dropout control signal output (the 34th pin of single-chip microcomputer IC1) of central control unit 1, control signal input (the 15th of single-chip microcomputer IC1 with central control unit 1, 16, 17, 24, 25 with 26 pin) the digital switch circuit 7 that is connected, stepper motor 31, and A phase, B phase and C phase current sensor T3, T4 and T5, sensor for detecting electric leakage T2 is connected with the detection of electrical leakage signal input part (the 33rd pin of single-chip microcomputer IC1) of central control unit 1 through amplifying circuit 3, and the energization control signal output (the 6th pin of single-chip microcomputer IC1) of central control unit 1 is connected with the power end of stepper motor 31 through drive circuit 6.
When central control unit 1 records existence sudden change leakage current in A phase, B phase or C phase power supply by sensor for detecting electric leakage T2, and when this sudden change leakage current is greater than the first preset value, central control unit 1 is controlled electrical apparatus release 10 through dropout drive circuit 9 and is carried out the action of threading off, to cut off the electricity supply; After 30 seconds, central control unit 1 rotates through drive circuit 6 control step motors 31, stepper motor 31 drives the operating grip 10-1 action of electrical apparatus release 10 through eccentric wheel 32 and drive link 33, make electrical apparatus release 10 carry out feed motion and make described operating grip 10-1 in closing position, switching on power simultaneously.
When recording by sensor for detecting electric leakage T2 in A phase, B phase or C phase power supply, central control unit 1 there is gradual leakage current, and when this gradual leakage current is greater than the second preset value, central control unit 1 is controlled electrical apparatus release 10 through dropout drive circuit 9 and is carried out the action of threading off, to cut off the electricity supply; After 5 minutes, central control unit 1 rotates through drive circuit 6 control step motors 31, and stepper motor 31 drives the operating grip 10-1 action of electrical apparatus release 10 through eccentric wheel 32 and drive link 33, and makes electrical apparatus release 10 carry out feed motion, to switch on power; If now gradual leakage current is still greater than the second preset value, central control unit 1 is controlled electrical apparatus release 10 through dropout drive circuit 9 and is carried out the action of threading off, and makes described operating grip 10-1 in dropout position, cuts off the electricity supply simultaneously.
(single-chip microcomputer IC1 the 2nd, 3 with 4 pin) is connected through the power supply test side of current stabilization circuit 5 and central control unit 1 for described A phase, B phase and C phase current sensor T3, T4 and T5; When central control unit 1 records while wherein there is overload current, short circuit current or phase shortage by A phase, B phase and C phase current sensor T3, T4 and T5, central control unit 1 is controlled electrical apparatus release 10 through dropout drive circuit 9 and is carried out the action of threading off, to cut off the electricity supply.
Described digital switch circuit 7 comprises: the first K switch 1, second switch K2, the 3rd K switch 3 and the 4th K switch 4 that are connected with 17 pin with the 26th, 25,24 of single-chip microcomputer IC1 respectively.
In the time of described the first K switch 1 closure (now, the 26th pin place low level of single-chip microcomputer IC1) only, described the first preset value is 50mA, and the second preset value is 300mA.
In the time of described second switch K2 closure (now, the 25th pin place low level of single-chip microcomputer IC1) only, described the first preset value is 75mA, and the second preset value is 500mA.
In the time that only described the first K switch 1 and second switch K2 are closed, described the first preset value is 100mA, and the second preset value is 1000mA.
In the time of only described the first K switch 1 and the 3rd K switch 3 closures (now, the 26th and 24 pin place low levels of single-chip microcomputer IC1), described the first preset value is 50mA, and the second preset value is 400mA.
In the time that only described second switch K2 and the 3rd K switch 3 are closed, described the first preset value is 75mA, and the second preset value is 1000mA.
When described the 4th K switch 4 closures (now, the 17th pin place low level of single-chip microcomputer IC1), described the first preset value is infinitely great, closes sudden change leakage current measuring ability.
Described transformation regulator rectifier circuit 4 comprises: the transformer T1 being in series successively, the rectification circuit being made up of diode D1-D4 and the mu balanced circuit being made up of resistance R 1 and voltage-stabiliser tube D7; The secondary output end of transformer T1 is provided with lightning protection piezo-resistance R61.
Described dropout drive circuit 9 comprises: on-off circuit (being made up of triode Q8, resistance R 4 and diode D10), the 3rd relay X3 being connected with the dropout control signal output (the 34th pin of single-chip microcomputer IC1) of central control unit 1 and the dropout drive coil L that carries out the action of threading off for controlling electrical apparatus release 10; Described on-off circuit is located in the electric power loop of the 3rd relay X3, and the control output end of the 3rd relay X3 is located in the current supply circuit of described dropout drive coil L, and the 3rd relay X3 is used for controlling between dropout drive coil L access A phase firewire and zero line N.
When the dropout control signal output output high level of central control unit 1 makes described on-off circuit closure, and the 3rd relay X3 is obtained when electric, the 3rd relay X3 controls the current supply circuit conducting of described dropout drive coil L, and electrical apparatus release 10 is carried out the action of threading off.
The display unit 8 being formed by charactron L6381, triode Q1-4 etc., the signal input part of the display output termination charactron LG381 of central control unit 1.
Described current stabilization circuit 5 comprises the first series circuit being made up of resistance R 39 and R40, the second series circuit being made up of resistance R 22 and R41, the 3rd series circuit being made up of resistance R 37 and R42, A phase, B phase and C phase current sensor T3, T4 and T5 are in parallel with described resistance R 40, R41 and R42 respectively, the power supply test side of central control unit 1 is the 2nd, 3 and 4 pin of single-chip microcomputer IC1, is connected respectively with above-mentioned first, second, and third series circuit.
The DC output end of the rectification circuit of described transformation regulator rectifier circuit 4 is provided with the first relay X1, the output of the first relay X1 is located in the electric power loop of described the 3rd relay X3, in the time that the first relay X1 is closed, the 3rd relay X3 is also closed, thereby makes electrical apparatus release 10 carry out the action of threading off. Therefore, as long as make the first relay X1 closure, just electrical apparatus release 10 can be all the time in trip status, with the harm that prevents that electrical apparatus release 10 from repeatedly closing a floodgate and may bring. The first relay X1 closure or disconnection, can be by manually controlling by digital switch K7.
Described amplifying circuit 3 comprises that signal amplifies integration module PIC604 and peripheral auxiliary circuits thereof.
When supply line normally works, leakage current is gradual amount, if gradual leakage current progressively increases while reaching the specified working value I Δ n of electric leakage, and leakage relay action tripping operation. Get an electric shock broken string even while landing when people and animals appear in supply line, and leakage current is now Sudden Changing Rate. Because this type of leakage relay all adopted and gradually separates discriminating with Sudden Changing Rate in when design, therefore to choose be key component to Sudden Changing Rate, generally all adopt differential circuit to detect (comprising positive negative pulse stuffing), in the time there is Sudden Changing Rate in circuit on certain gradual leakage current basis, differential circuit work, obtain a pulse signal, if this pulse signal is greater than the specified working value Δ I Δ n of sudden change electric leakage, leakage relay action tripping operation. In order to take into account gradual and sudden change electric leakage sensitivity and leakage relay operational reliability, the working value I Δ n that generally leaks electricity is all far longer than pulse action value Δ I Δ n.
Automatic reclosing operation principle brief analysis
Can be found out by Fig. 1 fundamental diagram, gradual amount detects and transient detection co-controlling automatic reclosing executive circuit after comparison circuit is differentiated, by DC relay connection point on-off control A.C. contactor break-make in the machine, complete automatic reclosing and trip avoidance function. During below to difference electric leakage situation, the reclosing course of work is done some (taking positive pulse as example) is discussed:
(1) when line electrical leakage is gradual amount and progressively increase while exceeding specified electric leakage working value I Δ n, comparator A exports high potential, makes the work of reclosing executive circuit. This signal still exists after time delay, and the leakage relay locking of once tripping, does not have automatic reclosing function. After only closing leakage relay power supply, restart, could bringing normally into operation.
(2) in the time that appearring in circuit, Sudden Changing Rate electric leakage discusses in two kinds of situation:
A Sudden Changing Rate is greater than specified pulse action value Δ I Δ n, but is less than specified electric leakage working value Δ n, and after time delay after one minute sustainable existence, as shown in Figure 2. Now transient detection circuit working, and make reclosing circuit working through comparator B, reclosing again after time delay in a minute, but because circuit still exists fault electric leakage Δ I Δ, (Δ I Δ n≤Δ I Δ≤I Δ n) trips reclosing circuit again, and there is several times reclosing to occur, if so-called two-hit phenomenon easily appears in human electric shock. If this fault current disappears in time delay one minute, reclosing circuit automatic closing, normal operating condition recovers in supply line.
B Sudden Changing Rate electric leakage is greater than specified pulse action value Δ I Δ n and exceedes specified electric leakage working value I Δ n, time delay after one minute this leakage current still exist. The Sudden Changing Rate occurring in the t1 moment makes reclosing circuit working after first by Sudden Changing Rate electric circuit inspection; A.C. contactor tripping operation; leakage current reduces to zero; after time delay in a minute, again close a floodgate; now because fault electric leakage still exists, and exceed I Δ n, make the work of gradual amount testing circuit in the t3 moment; reclosing circuit trips and protection blocking again, completes single shot reclosing function.
Claims (1)
1. a RCCB, is characterized in that comprising: inside is provided with the housing of electrical apparatus release (10) and control circuit(2), housing (2) is provided with for driving electrical apparatus release (10) to carry out the electronic conduction mechanism (3) of feed motion, shouldElectronic conduction mechanism (3) comprises stepper motor (31), eccentric wheel (32) and drive link (33), described eccentric wheel (32)Be arranged on the output shaft of stepper motor (31); Described electrical apparatus release (10) comprises the control of stretching out from housing (2)Handle (10-1), one end of drive link (33) and eccentric wheel (32) are rotationally connected, the other end and operating grip (10-1)Strand connects; Described control circuit comprises: central control unit (1), and for detection of the electric leakage electricity of A phase, B phase and C phase power supplyThe sensor for detecting electric leakage (T2) of stream, for the transformation regulator rectifier circuit (4) of dc source is provided, with center-controlThe connected dropout drive circuit (9) of dropout control signal output of unit, with the control signal input of central control unitHold connected digital switch circuit (7), stepper motor (31), and A phase, B phase and C phase current sensor (T3, T4,T5); Sensor for detecting electric leakage (T2) is the detection of electrical leakage signal input part phase with central control unit through amplifying circuit (3)Connect, the energization control signal output of central control unit is the power end with stepper motor (31) through drive circuit (6)Be connected; When central control unit (1) is recorded in A phase, B phase or C phase power supply and existed by sensor for detecting electric leakage (T2)Sudden change leakage current, and this sudden change leakage current is while being greater than the first preset value, and central control unit (1) drives through threading offCircuit (9) is controlled electrical apparatus release (10) and is carried out the action of threading off, to cut off the electricity supply; After 20-60 second, central control unit (1)Rotate through drive circuit (6) control step motor (31), stepper motor (31) is through eccentric wheel (32) and drive link(33) drive operating grip (10-1) action of electrical apparatus release (10), and make electrical apparatus release (10) carry out feed motion withSwitch on power; When central control unit (1) records in A phase, B phase or C phase power supply by sensor for detecting electric leakage (T2)Have gradual leakage current, and this gradual leakage current is while being greater than the second preset value, central control unit (1) is through threading offDrive circuit (9) is controlled electrical apparatus release (10) and is carried out the action of threading off, to cut off the electricity supply; After 3-10 minute, central authorities' controlUnit processed (1) rotates through drive circuit (6) control step motor (31), and stepper motor (31) is through eccentric wheel (32)And the action of the operating grip (10-1) of drive link (33) drive electrical apparatus release (10), and electrical apparatus release (10) execution is closedLock action, to switch on power; If now gradual leakage current is still greater than the second preset value, central control unit (1)Control electrical apparatus release (10) through dropout drive circuit (9) and carry out the action of threading off, to cut off the electricity supply; A phase, B phase and C be electricity mutuallyFlow sensor (T3, T4 and T5) is connected with the power supply test side of central control unit (1) through current stabilization circuit (5); WhenCentral control unit (1) records A phase, B phase or C phase by A phase, B phase and C phase current sensor (T3, T4 and T5)While there is overload current, short circuit current or phase shortage in power supply, central control unit (1) is controlled through dropout drive circuit (9)Electrical apparatus release processed (10) is carried out the action of threading off, to cut off the electricity supply;
The model of central control unit is the single-chip microcomputer IC1 of PIC16F74;
Described digital switch circuit (7) comprising: be connected with 17 pin with the 26th, 25,24 of single-chip microcomputer IC1 respectively firstK switch 1, second switch K2, the 3rd K switch 3 and the 4th K switch 4;
When described the first K switch 1 is only closed and when the 26th pin place low level of single-chip microcomputer IC1, described the first preset value is50mA, the second preset value is 300mA;
When described second switch K2 is only closed and when the 25th pin place low level of single-chip microcomputer IC1, described the first preset value is75mA, the second preset value is 500mA;
In the time that only described the first K switch 1 and second switch K2 are closed, described the first preset value is 100mA, the second preset valueFor 1000mA;
When described the first K switch 1 only with the 3rd K switch 3 is closed and when the 26th and 24 pin place low level of single-chip microcomputer IC1, instituteStating the first preset value is 50mA, and the second preset value is 400mA;
In the time that only described second switch K2 and the 3rd K switch 3 are closed, described the first preset value is 75mA, and the second preset value is1000mA；
When described the 4th K switch 4 is closed and when the 17th pin place low level of single-chip microcomputer IC1, described the first preset value is infiniteGreatly,, close sudden change leakage current measuring ability;
Described transformation regulator rectifier circuit (4) comprising: the transformer T1 that is in series successively, be made up of diode D1-D4Rectification circuit and the mu balanced circuit being formed by resistance R 1 and voltage-stabiliser tube D7; The secondary output end of transformer T1 is provided with lightning protection and pressesQuick resistance R 61;
Described dropout drive circuit (9) comprising: be connected with the dropout control signal output of central control unit (1)On-off circuit, the 3rd relay X3 and the dropout drive coil L moving for controlling electrical apparatus release execution dropout; Described openingClose circuit and be located in the electric power loop of the 3rd relay X3, the control output end of the 3rd relay X3 is located at described dropout and is drivenIn the current supply circuit of coil L, the 3rd relay X3 is used for controlling between dropout drive coil L access A phase firewire and zero line N;On-off circuit is made up of triode Q8, resistance R 4 and diode D10;
When the dropout control signal output output high level of central control unit makes described on-off circuit closure, and make the 3rdRelay X3 obtains when electric, and the 3rd relay X3 controls the current supply circuit conducting of described dropout drive coil L, and electrical apparatus release is carried outThread off and move.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210262480.XA CN102931034B (en) | 2012-07-27 | 2012-07-27 | Rccb |
| CN201610089820.1A CN106158540A (en) | 2012-07-27 | 2012-07-27 | A kind of RCCB with electric switch-on function |
| CN201610089160.7A CN105895464A (en) | 2012-07-27 | 2012-07-27 | Residual current circuit breaker having automatic closing function |
| CN201610089814.6A CN106159893A (en) | 2012-07-27 | 2012-07-27 | There is the RCCB of reclosing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210262480.XA CN102931034B (en) | 2012-07-27 | 2012-07-27 | Rccb |
Related Child Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610089820.1A Division CN106158540A (en) | 2012-07-27 | 2012-07-27 | A kind of RCCB with electric switch-on function |
| CN201610089814.6A Division CN106159893A (en) | 2012-07-27 | 2012-07-27 | There is the RCCB of reclosing function |
| CN201610089160.7A Division CN105895464A (en) | 2012-07-27 | 2012-07-27 | Residual current circuit breaker having automatic closing function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102931034A CN102931034A (en) | 2013-02-13 |
| CN102931034B true CN102931034B (en) | 2016-05-04 |
Family
ID=47645811
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610089814.6A Pending CN106159893A (en) | 2012-07-27 | 2012-07-27 | There is the RCCB of reclosing function |
| CN201210262480.XA Expired - Fee Related CN102931034B (en) | 2012-07-27 | 2012-07-27 | Rccb |
| CN201610089820.1A Pending CN106158540A (en) | 2012-07-27 | 2012-07-27 | A kind of RCCB with electric switch-on function |
| CN201610089160.7A Pending CN105895464A (en) | 2012-07-27 | 2012-07-27 | Residual current circuit breaker having automatic closing function |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610089814.6A Pending CN106159893A (en) | 2012-07-27 | 2012-07-27 | There is the RCCB of reclosing function |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610089820.1A Pending CN106158540A (en) | 2012-07-27 | 2012-07-27 | A kind of RCCB with electric switch-on function |
| CN201610089160.7A Pending CN105895464A (en) | 2012-07-27 | 2012-07-27 | Residual current circuit breaker having automatic closing function |
Country Status (1)
| Country | Link |
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| CN (4) | CN106159893A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105788982A (en) * | 2016-04-15 | 2016-07-20 | 泉州市大西洋电力科技有限公司 | Switch circuit breaker |
| CN109933041B (en) * | 2017-12-19 | 2024-09-06 | 上海亿盟电气自动化技术有限公司 | Online self-diagnosis circuit of low-voltage controller |
| CN109449059A (en) * | 2018-09-27 | 2019-03-08 | 杭州四方博瑞科技股份有限公司 | Intelligent breaker with self-checking function |
| CN112055493B (en) * | 2020-09-07 | 2021-06-29 | 广东众科智能科技股份有限公司 | Intelligent home controller based on Internet of things |
| CN114604511A (en) * | 2022-03-23 | 2022-06-10 | 华能青海发电有限公司新能源分公司 | High-energy battery storage bin with independent protection effect |
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| CN2746621Y (en) * | 2004-09-03 | 2005-12-14 | 任增辉 | Intelligent earth leakage protective device |
| CN202059153U (en) * | 2011-04-18 | 2011-11-30 | 乐清市公认电气有限公司 | Leakage protector suitable for over-current inverse time lag protection circuit |
| CN202094599U (en) * | 2011-04-18 | 2011-12-28 | 乐清市公认电气有限公司 | Leakage protector adapted to electromagnetic trip circuit |
| CN202749309U (en) * | 2012-07-27 | 2013-02-20 | 苏州贝腾特电子科技有限公司 | Residual current circuit breaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996030923A1 (en) * | 1995-03-31 | 1996-10-03 | The Nippon Signal Co., Ltd. | Solenoid relay driving circuit |
| CN2655414Y (en) * | 2003-10-20 | 2004-11-10 | 郑祥衡 | Phase and amplitude discriminating electric leak relay |
| JP4264817B2 (en) * | 2003-11-27 | 2009-05-20 | 富士電機機器制御株式会社 | Earth leakage breaker |
| CN201359979Y (en) * | 2009-03-18 | 2009-12-09 | 江苏辉能电气有限公司 | Residual current circuit breaker with automatic reclosing function |
| JP2011250486A (en) * | 2010-05-21 | 2011-12-08 | Panasonic Electric Works Co Ltd | Earth leakage breaker |
| CN201797296U (en) * | 2010-08-13 | 2011-04-13 | 颜福随 | Multifunctional intelligent earth leakage circuit breaker |
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2012
- 2012-07-27 CN CN201610089814.6A patent/CN106159893A/en active Pending
- 2012-07-27 CN CN201210262480.XA patent/CN102931034B/en not_active Expired - Fee Related
- 2012-07-27 CN CN201610089820.1A patent/CN106158540A/en active Pending
- 2012-07-27 CN CN201610089160.7A patent/CN105895464A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2746621Y (en) * | 2004-09-03 | 2005-12-14 | 任增辉 | Intelligent earth leakage protective device |
| CN202059153U (en) * | 2011-04-18 | 2011-11-30 | 乐清市公认电气有限公司 | Leakage protector suitable for over-current inverse time lag protection circuit |
| CN202094599U (en) * | 2011-04-18 | 2011-12-28 | 乐清市公认电气有限公司 | Leakage protector adapted to electromagnetic trip circuit |
| CN202749309U (en) * | 2012-07-27 | 2013-02-20 | 苏州贝腾特电子科技有限公司 | Residual current circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102931034A (en) | 2013-02-13 |
| CN106159893A (en) | 2016-11-23 |
| CN106158540A (en) | 2016-11-23 |
| CN105895464A (en) | 2016-08-24 |
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