CN106057592A - Residual-current circuit breaker - Google Patents
Residual-current circuit breaker Download PDFInfo
- Publication number
- CN106057592A CN106057592A CN201610458643.XA CN201610458643A CN106057592A CN 106057592 A CN106057592 A CN 106057592A CN 201610458643 A CN201610458643 A CN 201610458643A CN 106057592 A CN106057592 A CN 106057592A
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- Prior art keywords
- circuit
- control unit
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- central control
- switch
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by unbalance of two or more currents or voltages, e.g. for differential protection
-
- 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
-
- 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
-
- 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
-
- 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
- H01H71/24—Electromagnetic mechanisms
-
- 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
-
- 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
- H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/041—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using a short-circuiting device
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- Emergency Protection Circuit Devices (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
Abstract
The invention relates to a residual-current circuit breaker, comprising a shell in which a tripping device and a control circuit are arranged. The control circuit includes a central control unit, an electric leakage detection sensor used for detecting leakage currents of A-phase, B-phase and C-phase power supplies, a tripping driving circuit connected with the central control unit, and a stepping motor, wherein the electric leakage detection sensor is connected with an electric leakage detection signal input end of the central control unit through an amplification circuit, and a switching-on control signal output end of the central control unit is connected with a power supply end of the stepping motor through a driving circuit; the control circuit further comprises a digital switch circuit connected with the central control unit; and a user can conveniently adopt different thresholds of abruptly changed and slowly changed leakage currents according to different using occasions by controlling the digital switch circuit, so that the residual-current circuit breaker has strong practicability. The operation of setting a first preset value (abruptly changed leakage current value) to be 50 or 75mA can play a role in protecting a human body during an electric shock, and can effectively avoid an electric shock accident.
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, and transformer is by electricity
The current signal of motivation major loop is converted into small-signal current, delivers to monolithic after signaling conversion circuit and signal conditioning circuit
Machine, single-chip microcomputer carries out electric leakage sampling, three-phase current sampling to it, and judges whether electric leakage, phase shortage, short circuit, stall, three-phase successively
Uneven, overload, and then drive LED display module to show by display driver circuit, and cut off electricity by output control circuit
The input power of motivation.Open also a kind of RCCB of Chinese patent literature publication number CN1622414A.
It is in place of above-mentioned the deficiencies in the prior art: cannot be according to the gradual leakage current in power supply circuits with prominent
Become situation automatic trip and the automatic closing of leakage current, bring inconvenience to use.
Chinese patent literature notification number CN2496166Y disclose a kind of have gradual and sudden change two adjusting meanss leakage
Non-electricity protector, is selected variable (gradual with suddenly change) reference signal circuit that switch forms with at least three resistance with corresponding by multidigit
Variable (gradual with sudden change) comparator circuit be connected, separately constitute gradual with the device that can regulate respectively that suddenlys change.The program
It is disadvantageous in that: using analog circuit to realize gradual and sudden change leakage current monitoring, reliability is relatively low, and the program cannot
The function of automatic trip and combined floodgate is realized in conjunction with gradual and sudden change leakage current situation.
Chinese patent literature notification number CN2427915Y discloses a kind of monophase leakage protector, including performing circuit, leakage
Electrical signal detection circuit, over-current signal testing circuit, gradual electric leakage signal output circuit, sudden change electric leakage signal output circuit, mistake
Stream signal integration output circuit, over-current signal amplification output circuit, automatic reset circuit, reset lockout circuit, test with
Display circuit etc..Its after earth leakage protective action can automatic reclosing once.The program is disadvantageous in that: use simulation electricity
Road realizes the gradual monitoring with sudden change leakage current and shutting-brake control, is easily disturbed, and reliability is relatively low.
Summary of the invention
The technical problem to be solved be to provide a kind of can be according to the gradual leakage current in power supply circuits and prominent
The situation becoming leakage current realizes the RCCB of automatic trip and automatic switching-in function.
For solving above-mentioned technical problem, the RCCB of the present invention, it is provided with electrical apparatus release and control circuit including: inside
Housing, described control circuit includes: central control unit, for detecting the electric leakage inspection of the leakage current of A phase, B phase and C phase power supply
Survey sensor, the dropout drive circuit being connected with the dropout control signal outfan of central control unit, and motor；Leakage
The amplified circuit of electro-detection sensor is connected with the detection of electrical leakage signal input part of central control unit, the conjunction of central control unit
Lock control signal outfan is connected with the power end of motor through drive circuit；
Described control circuit also includes the digital switch circuit that the control signal input with central control unit is connected；Number is opened
Pass circuit includes: the first switch, second switch, the 3rd switch and the 4th switch；It is gentle that digital switch circuit is used for arranging sudden change
Become the threshold values of leakage current, to control the action of electrical apparatus release；
The second series connection that current stabilization circuit includes the first series circuit being made up of resistance R39 and R40, is made up of resistance R22 and R41
Circuit, the 3rd series circuit being made up of resistance R37 and R42, A phase, B phase and C phase current sensor T3, T4 and T5 respectively with institute
Stating resistance R40, R41 and R42 in parallel, the power detecting end of central control unit 1 is the 2nd of single-chip microcomputer IC1 the, 3 and 4 feet, respectively
It is connected with above-mentioned first, second, and third series circuit；
When the most described first switch Guan Bi, the threshold values of the first preset value namely sudden change leakage current is 50mA, the second preset value
Namely the threshold values of gradual leakage current is 300mA；
When the most described second switch closes, described first preset value is 75mA, and described second preset value is 500mA；
When the most described first switch and second switch close, described first preset value is 100mA, and described second preset value is
1000mA；
When the most described first switch and the 3rd switch Guan Bi, described first preset value is 50mA, and described second preset value is
400mA；
When the most described second switch and the 3rd switch Guan Bi, described first preset value is 75mA, and described second preset value is
1000mA；
When described 4th switch Guan Bi, described first preset value is infinitely great, i.e. closes sudden change leakage current detection function；
Described dropout drive circuit includes: the on-off circuit that is connected with the dropout control signal outfan of central control unit,
Three relays and for control electrical apparatus release perform trip action dropout drive coil；The 3rd relay is located at by described on-off circuit
In the electric power loop of device, the control output end of the 3rd relay is located in the described current supply circuit driving coil of threading off；
Make described on-off circuit close when the dropout control signal outfan of central control unit exports high level, and make the 3rd to continue
When electrical equipment obtains electric, threading off and drive the current supply circuit conducting of coil described in the 3rd Control, electrical apparatus release performs trip action；
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 more than the first preset value, central control unit controls electrical apparatus release execution through dropout drive circuit and threads off dynamic
Make, to cut off the electricity supply；
Gradual leakage current is there is when central control unit is recorded in A phase, B phase or C phase power supply by sensor for detecting electric leakage, and
When this gradual leakage current is more than the second preset value, central control unit 1 controls electrical apparatus release through dropout drive circuit and performs dropout
Action, to cut off the electricity supply；
The DC output end of the rectification circuit of described Transformer Rectifier mu balanced circuit is provided with the first relay, the output of the first relay
End is located in the electric power loop of described 3rd relay, and i.e. when the first relay Guan Bi, the 3rd relay also closes, so that
Electrical apparatus release performs trip action.
The present invention has positive effect: in (1) present invention, and control circuit also includes the number being connected with central control unit
Code switch circuit；Digital switch circuit is for arranging described sudden change and the threshold values of gradual leakage current, to control the dynamic of electrical apparatus release
Make.By controlling digital switch circuit, facilitate user and use different described sudden change and gradual according to different use occasion
The threshold values of leakage current, practicality is stronger.Wherein, described first preset value (sudden change leakage current value) is set to 50 or 75mA,
Can play a protective role when human electric shock, electric shock casualty accident can be prevented effectively from.(2) the Transformer Rectifier mu balanced circuit of the present invention
In, the secondary output end of transformator is provided with lightning protection varistor, and lightning protection varistor under normal conditions is 22M Ω, works as the present invention
RCCB when being struck by lightning, the secondary output high-frequency high-voltage current of transformator, the prevention of lightning protection varistor is down to 10 Ω,
Play short circuit effect, effectively protect the control circuit of the present invention.(3) in the control circuit of the present invention, central control unit warp
On-off circuit controls the action of the 3rd relay, thus controls dropout and drive the break-make of coil current, and then controls electrical apparatus release
Action；Wherein, the 3rd relay is by vulnerabilities scan, and driving coil of threading off is controlled by high voltage power supply, i.e. by adopting
With the 3rd relay, light current and forceful electric power are effectively isolated it, it is ensured that the safety and reliability of control circuit.
Accompanying drawing explanation
Fig. 1 is the structure chart of the RCCB of the present invention；
Fig. 2 is the circuit block diagram of the RCCB of the present invention；
Fig. 3 is the circuit theory diagrams of the RCCB of the present invention.
Detailed description of the invention
(embodiment 1)
See Fig. 1, the RCCB of the present embodiment, including: inside is provided with the housing 2 of electrical apparatus release 10 and control circuit, on housing 2
Being provided with for driving electrical apparatus release 10 to perform the electronic conduction mechanism 3 of feed motion, this electronic conduction mechanism 3 includes motor
31, eccentric 32 and drive link 33, described eccentric 32 is arranged on the output shaft of motor 31；Described electrical apparatus release 10 includes
The joystick 10-1 stretched out from housing 2, one end of drive link 33 is rotationally connected with eccentric 32, the other end and operation handle
10-1 twists even.
See that Fig. 2-3, described control circuit include: central control unit 1(model is the single-chip microcomputer IC1 of PIC16F74), use
In the sensor for detecting electric leakage T2 of the leakage current of detection A phase, B phase and C phase power supply, for providing the Transformer Rectifier of DC source
Mu balanced circuit 4, the dropout being connected with the dropout control signal outfan (the 34th foot of single-chip microcomputer IC1) of central control unit 1 is driven
Galvanic electricity road 9, with control signal input (the 15th of single-chip microcomputer IC1 the, 16,17,24, the 25 and 26 foot) phase of central control unit 1
Digital switch circuit 7 even, motor 31, and A phase, B phase and C phase current sensor T3, T4 and T5；Detection of electrical leakage passes
The amplified circuit of sensor T2 3 is connected with the detection of electrical leakage signal input part (the 33rd foot of single-chip microcomputer IC1) of central control unit 1,
The energization control signal outfan (the 6th foot of single-chip microcomputer IC1) of central control unit 1 is through drive circuit 6 and motor 31
Power end is connected.
Leak electricity when central control unit 1 records existence sudden change in A phase, B phase or C phase power supply by sensor for detecting electric leakage T2
Electric current, and when this sudden change leakage current is more than the first preset value, central control unit 1 controls electrical apparatus release through dropout drive circuit 9
10 perform trip action, to cut off the electricity supply；After 30 seconds, central control unit 1 controls motor 31 through drive circuit 6 and rotates,
Motor 31 drives the operation handle 10-1 action of electrical apparatus release 10 through eccentric 32 and drive link 33, makes electrical apparatus release 10 perform conjunction
Lock action also makes described operation handle 10-1 be in closing position, is also turned on power supply.
Gradual electric leakage is there is when central control unit 1 is recorded in A phase, B phase or C phase power supply by sensor for detecting electric leakage T2
Electric current, and when this gradual leakage current is more than the second preset value, central control unit 1 controls electrical apparatus release through dropout drive circuit 9
10 perform trip action, to cut off the electricity supply；After 5 minutes, central control unit 1 controls motor 31 turns through drive circuit 6
Dynamic, motor 31 drives the operation handle 10-1 action of electrical apparatus release 10 through eccentric 32 and drive link 33, and makes electrical apparatus release 10
Perform feed motion, to switch on power；If the most gradual leakage current is still above the second preset value, central control unit 1 warp
Dropout drive circuit 9 controls electrical apparatus release 10 and performs trip action, and makes described operation handle 10-1 be in trip positions, cuts simultaneously
Power-off source.
Described A phase, B phase and C phase current sensor T3, T4 and T5 are through the power supply inspection of current stabilization circuit 5 with central control unit 1
Survey end (the 2nd of single-chip microcomputer IC1 the, 3 and 4 feet) to be connected；When central control unit 1 by A phase, B phase and C phase current sensor T3,
T4 and T5 records when wherein there is overcurrent, short circuit current or phase shortage, and central control unit 1 controls through dropout drive circuit 9
Electrical apparatus release 10 performs trip action, to cut off the electricity supply.
Described digital switch circuit 7 includes: the first switch being connected with the 26th, 25,24 and 17 feet of single-chip microcomputer IC1 respectively
K1, second switch K2, the 3rd switch K3 and the 4th switch K4.
When the most described first switchs K1 Guan Bi (now, low level at the 26th foot of single-chip microcomputer IC1), described first presets
Value is 50mA, and the second preset value is 300mA.
When the most described second switch K2 closes (now, low level at the 25th foot of single-chip microcomputer IC1), described first presets
Value is 75mA, and the second preset value is 500mA.
When the most described first switchs K1 and second switch K2 Guan Bi, described first preset value is 100mA, the second preset value
For 1000mA.
When the most described first switchs K1 and the 3rd switch K3 Guan Bi (now, low electricity at the 26th and 24 feet of single-chip microcomputer IC1
Flat) time, described first preset value is 50mA, and the second preset value is 400mA.
When the most described second switch K2 and the 3rd switch K3 Guan Bi, described first preset value is 75mA, the second preset value
For 1000mA.
When the described 4th switchs K4 Guan Bi (now, low level at the 17th foot of single-chip microcomputer IC1), described first preset value
For infinity, i.e. close sudden change leakage current detection function.
Described Transformer Rectifier mu balanced circuit 4 includes: the transformator T1 that is sequentially connected in series, be made up of diode D1-D4
Rectification circuit and the mu balanced circuit being made up of with stabilivolt D7 resistance R1；The secondary output end of transformator T1 is provided with the pressure-sensitive electricity of lightning protection
Resistance R61.
Described dropout drive circuit 9 includes: with the dropout control signal outfan of central control unit 1 (single-chip microcomputer IC1's
34th foot) connected on-off circuit (being made up of audion Q8, resistance R4 and diode D10), the 3rd relay X3 and being used for
Control electrical apparatus release 10 and perform the dropout driving coil L of trip action；Described on-off circuit is located at the power supply of the 3rd relay X3 and is returned
Lu Zhong, the control output end of the 3rd relay X3 be located at described thread off drive coil L current supply circuit in, the 3rd relay X3 use
Coil L is driven to access between A phase firewire and zero line N in controlling to thread off.
Make described on-off circuit close when the dropout control signal outfan of central control unit 1 exports high level, and make
When 3rd relay X3 obtains electric, the 3rd relay X3 controls described dropout and drives the current supply circuit conducting of coil L, and electrical apparatus release 10 is held
Row trip action.
The display unit 8 being made up of charactron LG381, audion Q1-4 etc., the display signal output of central control unit 1
The signal input part of termination charactron LG381.
Described current stabilization circuit 5 includes the first series circuit being made up of resistance R39 and R40, is made up of resistance R22 and R41
The second series circuit, the 3rd series circuit that is made up of resistance R37 and R42, A phase, B phase and C phase current sensor T3, T4 and
T5 is in parallel with described resistance R40, R41 and R42 respectively, and the power detecting end of central control unit 1 is the 2nd of single-chip microcomputer IC1 the, 3
With 4 feet, it is connected with above-mentioned first, second, and third series circuit respectively.
The DC output end of the rectification circuit of described Transformer Rectifier mu balanced circuit 4 is provided with the first relay X1, the first relay
The outfan of device X1 is located in the electric power loop of described 3rd relay X3, i.e. when the first relay X1 Guan Bi, and the 3rd relay
Device X3 also closes, so that electrical apparatus release 10 performs trip action.Therefore, as long as making the first relay X1 Guan Bi, electrical apparatus release 10 is just
Trip status can be in all the time, to prevent electrical apparatus release 10 from repeatedly closing a floodgate the harm that may bring.First relay X1 Guan Bi or disconnected
Open, can be by manually being controlled by digital switch K7.
Described amplifying circuit 3 includes 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 is stepped up reaching leaking electricity specified
During working value I Δ n, leakage relay action is tripped.When supply line occur people and animals get an electric shock even broken string land time, leakage now
Electric current is Sudden Changing Rate.Gradual discriminating, therefore Sudden Changing Rate is separated with Sudden Changing Rate owing to this type of leakage relay all uses when design
Choosing is key component, generally individually uses peaker detection (including positive negative pulse stuffing), when circuit is at certain gradual leakage current
On the basis of time Sudden Changing Rate occurs, peaker works, and obtains a pulse signal, if this pulse signal is specified more than sudden change electric leakage dynamic
Work value Δ I Δ n, then leakage relay action tripping operation.Run to take into account gradual and sudden change electric leakage sensitivity and leakage relay
Reliability, general electric leakage working value I Δ n is all far longer than pulse action value Δ I Δ n.
Automatic reclosing operation principle brief analysis
By Fig. 1 fundamental diagram it can be seen that gradual amount detection with transient detection through comparison circuit differentiate after co-controlling from
Dynamic reclosing performs circuit, DC relay connection point on-off in the machine control A.C. contactor break-make, complete automatic reclosing
With trip avoidance function.Below reclosing work process during different drain conditions is made some and (as a example by positive pulse) is discussed:
(1) when line electrical leakage be gradual amount and incrementally increase exceed specified electric leakage working value I Δ n time, the high electricity of comparator A output
Position, makes reclosing perform circuit work.This signal yet suffers from after time delay, and leakage relay once trips locking, does not has
Automatic reclosing function.Restart after only closing leakage relay power supply, could bringing normally into operation.
(2) occur discussing in two kinds of situation when Sudden Changing Rate leaks electricity when circuit:
A Sudden Changing Rate is more than nominal pulse working value Δ I Δ n, but less than specified electric leakage working value Δ n, and through time delay after one minute
Rear sustainable existence, as shown in Figure 2.Now transient detection circuit work, and make reclosing circuit work through comparator B, through one
Reclosing again after minute time delay, but owing to circuit still suffers from fault electric leakage Δ I Δ, (Δ I Δ n≤Δ I Δ≤I Δ n) makes weight
Combined floodgate circuit trips again, and has reclosing several times to occur, if human electric shock the most easily occurs that so-called two-hit is existing
As.If in time delay one minute, this fault current disappears, then reclosing circuit automatic closing, properly functioning shape recovers in supply line
State.
The electric leakage of b Sudden Changing Rate more than nominal pulse working value Δ I Δ n and exceedes specified electric leakage working value I Δ n, time delay one point
After clock, this leakage current yet suffers from.The Sudden Changing Rate occurred in the t1 moment first by Sudden Changing Rate electric circuit inspection after make reclosing circuit work
Making, A.C. contactor trips, and leakage current is reduced to zero, again closed a floodgate after time delay in a minute, now still deposits due to fault electric leakage
, and more than I Δ n, in the t3 moment, gradual amount testing circuit is worked, reclosing circuit trips and protection blocking again,
Complete single shot reclosing function.
Claims (1)
1. a RCCB, is provided with the housing of electrical apparatus release and control circuit including inside, and described control circuit includes: central authorities
Control unit, for detecting the sensor for detecting electric leakage of the leakage current of A phase, B phase and C phase power supply, with central control unit
The dropout drive circuit that dropout control signal outfan is connected, and motor；The amplified circuit of sensor for detecting electric leakage with
The detection of electrical leakage signal input part of central control unit is connected, and the energization control signal outfan of central control unit is through driving electricity
Road is connected with the power end of motor；
It is characterized in that including: described control circuit also includes the number that the control signal input with central control unit is connected
On-off circuit；Digital switch circuit includes: the first switch, second switch, the 3rd switch and the 4th switch；Digital switch circuit is used
Suddenly change and the threshold values of gradual leakage current in arranging, to control the action of electrical apparatus release；
The second series connection that current stabilization circuit includes the first series circuit being made up of resistance R39 and R40, is made up of resistance R22 and R41
Circuit, the 3rd series circuit being made up of resistance R37 and R42, A phase, B phase and C phase current sensor T3, T4 and T5 respectively with institute
Stating resistance R40, R41 and R42 in parallel, the power detecting end of central control unit 1 is the 2nd of single-chip microcomputer IC1 the, 3 and 4 feet, respectively
It is connected with above-mentioned first, second, and third series circuit；
When the most described first switch Guan Bi, the threshold values of the first preset value namely sudden change leakage current is 50mA, the second preset value
Namely the threshold values of gradual leakage current is 300mA；
When the most described second switch closes, described first preset value is 75mA, and described second preset value is 500mA；
When the most described first switch and second switch close, described first preset value is 100mA, and described second preset value is
1000mA；
When the most described first switch and the 3rd switch Guan Bi, described first preset value is 50mA, and described second preset value is
400mA；
When the most described second switch and the 3rd switch Guan Bi, described first preset value is 75mA, and described second preset value is
1000mA；
When described 4th switch Guan Bi, described first preset value is infinitely great, i.e. closes sudden change leakage current detection function；
Described dropout drive circuit includes: the on-off circuit that is connected with the dropout control signal outfan of central control unit,
Three relays and for control electrical apparatus release perform trip action dropout drive coil；The 3rd relay is located at by described on-off circuit
In the electric power loop of device, the control output end of the 3rd relay is located in the described current supply circuit driving coil of threading off；
Make described on-off circuit close when the dropout control signal outfan of central control unit exports high level, and make the 3rd to continue
When electrical equipment obtains electric, threading off and drive the current supply circuit conducting of coil described in the 3rd Control, electrical apparatus release performs trip action；
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 more than the first preset value, central control unit controls electrical apparatus release execution through dropout drive circuit and threads off dynamic
Make, to cut off the electricity supply；
Gradual leakage current is there is when central control unit is recorded in A phase, B phase or C phase power supply by sensor for detecting electric leakage, and
When this gradual leakage current is more than the second preset value, central control unit 1 controls electrical apparatus release through dropout drive circuit and performs dropout
Action, to cut off the electricity supply；
The DC output end of the rectification circuit of described Transformer Rectifier mu balanced circuit is provided with the first relay, the output of the first relay
End is located in the electric power loop of described 3rd relay, and i.e. when the first relay Guan Bi, the 3rd relay also closes, so that
Electrical apparatus release performs trip action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610458643.XA CN106057592A (en) | 2012-07-27 | 2012-07-27 | Residual-current circuit breaker |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210262479.7A CN102904208B (en) | 2012-07-27 | 2012-07-27 | A kind of RCCB |
| CN201610458643.XA CN106057592A (en) | 2012-07-27 | 2012-07-27 | Residual-current circuit breaker |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210262479.7A Division CN102904208B (en) | 2012-07-27 | 2012-07-27 | A kind of RCCB |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106057592A true CN106057592A (en) | 2016-10-26 |
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ID=47576324
Family Applications (10)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610458644.4A Withdrawn CN106058805A (en) | 2012-07-27 | 2012-07-27 | Residual-current circuit breaker |
| CN201610458643.XA Withdrawn CN106057592A (en) | 2012-07-27 | 2012-07-27 | Residual-current circuit breaker |
| CN201610464969.3A Withdrawn CN105957780A (en) | 2012-07-27 | 2012-07-27 | Electric leakage circuit breaker |
| CN201610460929.1A Withdrawn CN105977112A (en) | 2012-07-27 | 2012-07-27 | Electric leakage circuit breaker |
| CN201610459872.3A Withdrawn CN105957779A (en) | 2012-07-27 | 2012-07-27 | Electric leakage circuit breaker |
| CN201610459568.9A Withdrawn CN106058807A (en) | 2012-07-27 | 2012-07-27 | Electric leakage circuit breaker |
| CN201610464970.6A Withdrawn CN106098484A (en) | 2012-07-27 | 2012-07-27 | A kind of RCCB |
| CN201610461205.9A Withdrawn CN106024544A (en) | 2012-07-27 | 2012-07-27 | Electric leakage circuit breaker |
| CN201610458941.9A Withdrawn CN106058806A (en) | 2012-07-27 | 2012-07-27 | Residual-current circuit breaker |
| CN201210262479.7A Expired - Fee Related CN102904208B (en) | 2012-07-27 | 2012-07-27 | A kind of RCCB |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610458644.4A Withdrawn CN106058805A (en) | 2012-07-27 | 2012-07-27 | Residual-current circuit breaker |
Family Applications After (8)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610464969.3A Withdrawn CN105957780A (en) | 2012-07-27 | 2012-07-27 | Electric leakage circuit breaker |
| CN201610460929.1A Withdrawn CN105977112A (en) | 2012-07-27 | 2012-07-27 | Electric leakage circuit breaker |
| CN201610459872.3A Withdrawn CN105957779A (en) | 2012-07-27 | 2012-07-27 | Electric leakage circuit breaker |
| CN201610459568.9A Withdrawn CN106058807A (en) | 2012-07-27 | 2012-07-27 | Electric leakage circuit breaker |
| CN201610464970.6A Withdrawn CN106098484A (en) | 2012-07-27 | 2012-07-27 | A kind of RCCB |
| CN201610461205.9A Withdrawn CN106024544A (en) | 2012-07-27 | 2012-07-27 | Electric leakage circuit breaker |
| CN201610458941.9A Withdrawn CN106058806A (en) | 2012-07-27 | 2012-07-27 | Residual-current circuit breaker |
| CN201210262479.7A Expired - Fee Related CN102904208B (en) | 2012-07-27 | 2012-07-27 | A kind of RCCB |
Country Status (1)
| Country | Link |
|---|---|
| CN (10) | CN106058805A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360616A (en) * | 2014-10-31 | 2015-02-18 | 宁波市鄞州祥弘电子有限公司 | Automatic gradient gel mixing device and control circuit and control method thereof |
| CN104953550B (en) * | 2015-05-19 | 2018-12-14 | 中国核电工程有限公司 | A kind of earth leakage protective device of motor |
| CN105137876A (en) * | 2015-08-25 | 2015-12-09 | 孙鸿昌 | Industrial intelligent detection circuit control system |
| CN105576597A (en) * | 2016-02-29 | 2016-05-11 | 上海电机学院 | Residual current motion protection method and device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2655414Y (en) * | 2003-10-20 | 2004-11-10 | 郑祥衡 | Phase and amplitude discriminating electric leak relay |
| CN2746621Y (en) * | 2004-09-03 | 2005-12-14 | 任增辉 | Intelligent earth leakage protective device |
| JP2011250486A (en) * | 2010-05-21 | 2011-12-08 | Panasonic Electric Works Co Ltd | Earth leakage breaker |
| CN202917947U (en) * | 2012-07-27 | 2013-05-01 | 苏州贝腾特电子科技有限公司 | Electric leakage circuit breaker |
-
2012
- 2012-07-27 CN CN201610458644.4A patent/CN106058805A/en not_active Withdrawn
- 2012-07-27 CN CN201610458643.XA patent/CN106057592A/en not_active Withdrawn
- 2012-07-27 CN CN201610464969.3A patent/CN105957780A/en not_active Withdrawn
- 2012-07-27 CN CN201610460929.1A patent/CN105977112A/en not_active Withdrawn
- 2012-07-27 CN CN201610459872.3A patent/CN105957779A/en not_active Withdrawn
- 2012-07-27 CN CN201610459568.9A patent/CN106058807A/en not_active Withdrawn
- 2012-07-27 CN CN201610464970.6A patent/CN106098484A/en not_active Withdrawn
- 2012-07-27 CN CN201610461205.9A patent/CN106024544A/en not_active Withdrawn
- 2012-07-27 CN CN201610458941.9A patent/CN106058806A/en not_active Withdrawn
- 2012-07-27 CN CN201210262479.7A patent/CN102904208B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN105957779A (en) | 2016-09-21 |
| CN106098484A (en) | 2016-11-09 |
| CN106024544A (en) | 2016-10-12 |
| CN102904208B (en) | 2016-08-03 |
| CN102904208A (en) | 2013-01-30 |
| CN106058806A (en) | 2016-10-26 |
| CN105957780A (en) | 2016-09-21 |
| CN105977112A (en) | 2016-09-28 |
| CN106058807A (en) | 2016-10-26 |
| CN106058805A (en) | 2016-10-26 |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20161026 |
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| WW01 | Invention patent application withdrawn after publication |