CN105304425A - Safe ground fault circuit interrupter and control method thereof - Google Patents
Safe ground fault circuit interrupter and control method thereof Download PDFInfo
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- CN105304425A CN105304425A CN201510676381.XA CN201510676381A CN105304425A CN 105304425 A CN105304425 A CN 105304425A CN 201510676381 A CN201510676381 A CN 201510676381A CN 105304425 A CN105304425 A CN 105304425A
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- misconnection
- iron core
- reset
- circuit
- release link
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- 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
- H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
- H01H83/04—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents with testing means for indicating the ability of the switch or relay to function properly
Abstract
The invention relates to a safe ground fault circuit interrupter and a control method thereof. The circuit interrupter comprises a base, an upper cover, a bracket reset mechanism, an electromagnetic tripping mechanism, a misconnection preventing mechanism, a contact assembly, a grounding assembly, a power supply input connection assembly, an output connection assembly, a PCB (printed circuit board) and a circuit interrupter circuit arranged on the PCB. The circuit interrupter circuit comprises a power supply circuit, an electric leakage grounding detection circuit, a signal amplification and rectification circuit, a singlechip microcomputer control circuit, a power supply detection and work indication circuit, a tripping mechanism control circuit and a false wiring protection circuit. The misconnection preventing mechanism comprises a misconnection preventing electromagnet and a limiting mechanism which is arranged on a reset lever and matched with the front end of a misconnection preventing iron core of the misconnection preventing electromagnet. The control method comprises the steps of initial state setting, correct wiring action control, false wiring action control and electric leakage protection control for the circuit interrupter. According to the invention, the height of the circuit interrupter is reduced, and more choices are provided for the structure of the ground fault circuit interrupter; and the ground fault circuit interrupter is simple in structure and reliable in protection.
Description
Technical field
The present invention relates to a kind of ground-fault interrupter, also relate to the control method using this ground-fault interrupter.
Background technology
Ground-fault interrupter GFCI (GroundFaultCircuitInterrupter) be in the North America such as the U.S., Canada, the earth leakage protective product of South American nations and regional extensive use, above-mentioned regional the people's lives and property is played a very good protection safely.Existing GFCI generally includes base, is provided with the upper cover of jack, electromagnetic release mechanism, contact assembly, grounding assembly, power supply input coupling assembling, export coupling assembling etc., its circuit comprises power circuit, electric leakage grounded inspection circuit, signal amplification circuit, power indicating circuit and tripping mechanism control circuit, and electromagnetic release mechanism controls and action by electric leakage grounded inspection circuit.GFCI provides power supply by the jack of upper cover for load, also can by exporting coupling assembling to the load supplying connected thereon.Publication number be US2013021120A1, US2013038968A1 U.S. patent applications disclose above-mentioned existing GFCI.
The defect of perfect reverse wiring measuring ability is lacked in order to solve GFCI, applicant is disclose in the Chinese patent application of CN201410641061 " a kind of ground fault protection circuit and ground-fault interrupter " at application number, structure corresponding to the reverse ground protection circuit of this ground-fault interrupter is as Fig. 2, shown in Fig. 3, because misoperation is by the reverse polarity connection of the power supply input terminal 7 of ground-fault interrupter during for avoiding installing ground-fault interrupter, thus cause the socket output polarity of ground-fault interrupter oppositely power consumption equipment to be caused to the hidden danger of damage, applicant have employed the structure arranging negative-phase relay 401 at the output 9 of ground-fault interrupter, adopt this negative-phase relay 401, when there is misoperation by the reverse polarity connection of the power supply input terminal 7 of ground-fault interrupter, internal circuit will keep negative-phase relay 401 conducting adhesive, the fixed contact 404 of socket pole piece 403 is kept to be separated with the moving contact 402 of negative-phase relay 401, thus the output 9 of ground-fault interrupter is disconnected and jack end always, the electrical connection of input, prompting wiring error, prevent the hidden danger brought because of wiring error.
Although existing ground-fault interrupter adopts above-mentioned negative-phase relay structure to solve the defect lacking reverse wiring measuring ability, but, because structurally the moving contact 402 of negative-phase relay 401 and the fixed contact 404 of socket pole piece 403 adopt upper and lower fit structure, cause the height dimension of whole ground-fault interrupter large, be unfavorable for the overall volume reducing ground-fault interrupter.
Summary of the invention
One of the technical problem to be solved in the present invention is, provides a kind of safety ground stoppage circuit breaker, overcomes existing ground-fault interrupter height dimension large, is unfavorable for the defect reducing ground-fault interrupter overall volume.
Two of the technical problem to be solved in the present invention is, provide a kind of safety ground stoppage circuit breaker control method, safety guarantee ground-fault interrupter action message, prevents the hidden danger that ground-fault interrupter brings because of wiring error.
The present invention solves the technical scheme that one of its technical problem adopts: construct a kind of safety ground stoppage circuit breaker, the breaker circuit comprising base, upper cover, support resetting device, electromagnetic release mechanism, contact assembly, grounding assembly, power supply input coupling assembling, output coupling assembling, pcb board and be arranged on this pcb board, this breaker circuit comprises power circuit, electric leakage grounded inspection circuit, signal amplification shaping circuit, single chip machine controlling circuit, power detecting and working indicating and tripping mechanism control circuit;
Described support resetting device comprises the reset cradle seat be arranged on this pcb board, the sliding dawn be arranged on this reset cradle seat, support back-moving spring, reset key, back-moving spring, release link, reset slide block and the Compress Spring that is arranged in reset slide block, this cunning dawn comprises transversely slip and exports the conduction moving contact that fixed contact coordinates, the action inclined-plane coordinated with the driving inclined-plane of described reset slide block with circuit breaker socket pole piece fixed contact and wiring, support back-moving spring is arranged between this cunning dawn and reset cradle seat, drives sliding dawn transverse shifting;
Described electromagnetic release mechanism comprises the release electromagnet be arranged on this pcb board, this release electromagnet comprises framework of trip coil, the tripping coil be wrapped on this skeleton, the dropout iron core limiting plate that is arranged on this intraskeletal dropout iron core and dropout iron core return-spring, is arranged on this skeleton rear end, and this dropout iron core return-spring is between this dropout iron core and this anti-misconnection iron core limiting plate; This dropout iron core its front end under the effect of this dropout iron core return-spring can coordinate with the interlock hole of the reset locking hole of the release link of described support resetting device and reset slide block and this reset slide block and this release link locked together, under this release electromagnet "on" position, this dropout iron core adsorbs this dropout iron core limiting plate and compresses this dropout iron core return-spring under the effect in this tripping coil magnetic field, removes the locking to described release link and reset slide block of dropout rod nose;
This release link lower end can drive the reed switch be arranged on described pcb board to disconnect;
It is characterized in that, this safety ground stoppage circuit breaker also comprises anti-misconnection mechanism, this anti-misconnection mechanism comprises anti-misconnection electromagnet, this anti-misconnection electromagnet comprises anti-misconnection coil rack, the anti-misconnection coil be wrapped on this skeleton, be arranged on this intraskeletal anti-misconnection iron core and anti-misconnection iron core return-spring, be arranged on the anti-misconnection iron core limiting plate of this skeleton rear end and be arranged on this and misplace the stopping means connecing rod nose, and this anti-misconnection iron core return-spring is between this anti-misconnection iron core and this anti-misconnection iron core limiting plate; Described release link comprises and to be engaged in down direction with the stopping means of this anti-misconnection rod nose by the spacing position limiting structure of the stopping means of this anti-misconnection rod nose; This anti-misconnection iron core stretches out by this anti-misconnection iron core return-spring effect, and the stopping means of its front end coordinates with this release link position limiting structure and carries out spacing to this release link;
Described breaker circuit comprises the false wiring protective circuit be connected with described single chip machine controlling circuit, this false wiring protective circuit comprises described anti-misconnection electromagnet, rectification circuit, one-way SCR and regulating resistor, the high potential input of this rectification circuit connects the civil power live wire incoming end of this breaker circuit, electronegative potential output connects this anti-misconnection magnet spool one end, this anti-misconnection magnet spool other end connects the anode of this one-way SCR, the minus earth of this one-way SCR, trigger end connects single-chip microcomputer triggering signal three end of this breaker circuit, this regulating resistor is connected between the trigger end of this one-way SCR and ground.
In a kind of safety ground stoppage circuit breaker of the present invention, the position limiting structure of described release link is be arranged on the release link correspondence position step that coordinate spacing with described anti-misconnection rod nose, the stopping means of described anti-misconnection rod nose is the block piece being connected to this anti-misconnection rod nose, and this block piece comprises the confined planes coordinated with the described step of this release link.
In a kind of safety ground stoppage circuit breaker of the present invention, the position limiting structure of described release link is be arranged on the release link correspondence position hole that coordinate spacing with described anti-misconnection rod nose, and the stopping means of described anti-misconnection rod nose is the forward end of this anti-misconnection iron core.
In a kind of safety ground stoppage circuit breaker of the present invention, the parallel direction interval of the horizontally set of axis along the dropout iron core axis of described release electromagnet of the anti-misconnection iron core of described anti-misconnection electromagnet or the dropout iron core axis along described release electromagnet is arranged.
The present invention solves the technical scheme that its technical problem two adopts: provide a kind of safety ground stoppage circuit breaker control method, safety ground stoppage circuit breaker, as described in one of claims 1 to 3, is characterized in that, the method comprises:
Arranging initial condition is:
Reset key is up under action of reset spring is in initial position, the sliding dawn under support action of reset spring retrolisthesis from, make the conduction moving contact on the sliding dawn export fixed contact be separated with the conduction fixed contact on the electric conduction electrode-plate of left and right, wiring, the cunning dawn is in initial position;
The interlock hole of dropout iron core through reset slide block under the effect of dropout iron core return-spring of electromagnetic release mechanism release electromagnet is pressed in release link on the surface;
The anti-misconnection iron core of anti-misconnection mechanism anti-misconnection electromagnet stretches out in the effect of anti-misconnection iron core return-spring, and the stopping means of anti-misconnection rod nose is in the descending restraining position of the described release link of restriction, and safety ground stoppage circuit breaker is in initial condition;
Correct wiring action control:
After safety ground stoppage circuit breaker correct wiring, pressing reset key, overcoming back-moving spring elastic force by dynamic pressure makes reset key drive release link descending, when release link lower end is oppressed, reed switch is descending to be disconnected with pcb board, the MCU of safety ground stoppage circuit breaker circuit receives signal, sending instruction makes anti-misconnection electromagnet be energized, anti-misconnection coil produces magnetic field, make anti-misconnection iron core under the effect of electromagnetic force with the adhesive of anti-misconnection iron core limiting plate, compression anti-misconnection iron core return-spring is retracted, and that removes release link is spacing;
After the anti-misconnection iron core retraction of anti-misconnection electromagnet, release link continues under by dynamic pressure effect descending, when the reset locking hole in release link overlaps with the interlock hole of reset slide block, reset slide block and release link through the reset locking hole of release link, lock together by the dropout iron core of electromagnetic release mechanism release electromagnet under the effect of dropout iron core return-spring;
Remove the pressing force to reset key, reset key is up under action of reset spring, drives release link up with locked reset slide block; When the driving inclined-plane of reset slide block coordinates with the action inclined-plane at sliding dawn, the elastic force that the reset slider-actuated sliding dawn overcomes support back-moving spring moves forward, make the conduction moving contact on the sliding dawn export fixed contact with circuit breaker socket pole piece fixed contact and wiring and coordinate conducting, make safety ground stoppage circuit breaker present reset operating state;
False wiring action control:
When the input terminal incorrect polarity wiring of safety ground stoppage circuit breaker power supply, control circuit non-transformer does not work; Pressing reset key, overcoming back-moving spring elastic force by dynamic pressure makes reset key drive release link descending, when release link lower end is oppressed, reed switch is descending to be disconnected with pcb board, anti-misconnection electromagnet keeps the initial condition of power-off, the stopping means of the anti-misconnection rod nose of anti-misconnection electromagnet is in restraining position and carries out spacing to release link, stop release link to continue descending, make the locking that the dropout iron core of electromagnetic release mechanism release electromagnet cannot realize release link and reset slide block;
Earth leakage protective controls:
When the MCU of safety ground stoppage circuit breaker circuit has detected leakage current, electric leakage grounded inspection circuit makes electromagnetic release mechanism energising action, dropout iron core is bounced back under electromagnetic force, dropout rod nose portion departs from the reset locking hole of release link, reset key is up under action of reset spring together with release link, and reset slide block departs from reset cradle and is returned to initial condition under Compress Spring effect; Because reset slide block is returned to initial condition; remove the driving to the sliding dawn; the sliding dawn is rear sliding under support action of reset spring; conduction moving contact on the sliding dawn exports fixed contact with circuit breaker socket pole piece fixed contact with wiring and is separated; disconnect the connection of safety ground stoppage circuit breaker input and socket output, wiring output, realize earth leakage protective.
Implement a kind of safety ground stoppage circuit breaker of the present invention and control method thereof, compared with the prior art, its beneficial effect is:
1. be that transverse direction is slidably matched because sliding dawn conduction moving contact that anti-misconnection mechanism is corresponding exports fixed contact with circuit breaker socket pole piece fixed contact and wiring, eliminate the impact of sliding stroke on breaker structure height dimension, thus reduce circuit breaker height dimension;
2. adopt anti-misconnection mechanism to substitute negative-phase relay scheme, for ground-fault interrupter structure provides more more options;
3. structure is simple, and protection is reliable.
Accompanying drawing explanation
Fig. 1 is the stereogram of a kind of embodiment of safety ground stoppage circuit breaker of the present invention.
Fig. 2 is the stereogram of existing ground-fault interrupter internal structure.
Fig. 3 is the stereogram that existing ground-fault interrupter prevents false wiring mechanism.
Fig. 4 is the stereogram of safety ground stoppage circuit breaker internal structure of the present invention.
Fig. 5 is the stereogram after safety ground stoppage circuit breaker internal structure of the present invention removes socket pole piece and socket output precision.
Fig. 6 is the exploded perspective view that safety ground stoppage circuit breaker of the present invention prevents a kind of embodiment of false wiring mechanism.
Fig. 7 is the vertical view of safety ground stoppage circuit breaker internal structure of the present invention.
Fig. 8 is A-A cutaway view in Fig. 7.
Fig. 9 is B-B cutaway view in Fig. 7.
Figure 10 is one of exploded perspective view of safety ground stoppage circuit breaker internal structure of the present invention.
Figure 11 is the exploded perspective view two of safety ground stoppage circuit breaker internal structure of the present invention.
Figure 12 is the exploded perspective view three of safety ground stoppage circuit breaker internal structure of the present invention.
Figure 13 is the circuit theory diagrams of a kind of embodiment of safety ground stoppage circuit breaker of the present invention.
Figure 14,15,16 be one of circuit diagram of a kind of embodiment of safety ground stoppage circuit breaker of the present invention, two, three.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, Figure 4, Figure 5, safety ground stoppage circuit breaker 1000 of the present invention comprises base 1, upper cover 2, support resetting device, electromagnetic release mechanism, anti-misconnection mechanism, contact assembly, grounding assembly, power supply input coupling assembling 7, exports coupling assembling 9, pcb board 30 and the breaker circuit that is arranged on this pcb board 30.
This breaker circuit comprises power circuit 309, electric leakage grounded inspection circuit 302, signal amplification shaping circuit 303, single chip machine controlling circuit 301, simulation electric-leakage detection circuit 305 (feeler switch 5 in Fig. 1 is the manual test button of simulation electric-leakage detection circuit 305), power detecting and working indicating 306, false wiring protective circuit 307 and tripping mechanism control circuit 308 as shown in fig. 13 that.
In other embodiments, simulation electric-leakage detection circuit 305 is not set, does not affect the realization of the basic goal of the invention of the present invention.
Power circuit 309, electric leakage grounded inspection circuit 302, signal amplification shaping circuit 303, single chip machine controlling circuit 301, simulation electric-leakage detection circuit 305, power detecting and working indicating 306 and tripping mechanism control circuit 308 and annexation thereof can adopt circuit and annexation (as shown in Figure 14, Figure 15, Figure 16) disclosed in Chinese patent application CN201410641061, and each circuit also can adopt other equivalent electric circuit to substitute.
As Figure 14, shown in Figure 16, false wiring protective circuit 307 comprises anti-misconnection electromagnet T1 (i.e. structure chart Fig. 5, anti-misconnection electromagnet 19 in Fig. 7), diode D1, unidirectional controllable silicon S CR3 and regulating resistor R9, this diode D1 positive pole connects the incoming end of the civil power live wire L of this breaker circuit, negative pole connects coil one end of anti-misconnection electromagnet T1, the coil other end of this anti-misconnection electromagnet T1 connects the anode of unidirectional controllable silicon S CR3, the minus earth of this unidirectional controllable silicon S CR3, trigger end connects the triggering signal Trig3 end of the single-chip microcomputer U4 of this breaker circuit, regulating resistor R9 is connected between the trigger end of unidirectional controllable silicon S CR3 and ground, to regulate trigger end voltage.
Diode D1 plays rectified action.In other embodiments, diode D1 adopts other rectification circuit to replace, and also can realize the object of the invention.
Base 1, upper cover 2, support resetting device, electromagnetic release mechanism, contact assembly, grounding assembly, power supply input coupling assembling 7, output coupling assembling 9 can adopt the counter structure of existing ground-fault interrupter or realize the modified node method of identical function.
Such as, as shown in Fig. 5 to Figure 10, support resetting device comprises the reset cradle seat 20 be arranged on pcb board 30, the sliding dawn 12 be arranged on this reset cradle seat 20, support back-moving spring 13, reset key 4, back-moving spring 17, release link 14, reset slide block 22 and the Compress Spring 24 that is arranged in reset slide block 22.The sliding dawn 12 is insulator, be provided with that to export fixed contact with the fixed contact 105 on circuit breaker left and right socket pole piece (101,102) and wiring (invisible in figure, be positioned at below socket pole piece fixed contact 105) coordinate the conduction moving contact 121 controlling conducting, disconnection, conduction moving contact 121 inputs coupling assembling 7 by shorting conductive sheet 8 with short circuit conductor 21 and power supply and is connected; The sliding dawn 12 is also provided with the action inclined-plane coordinated with the driving inclined-plane of the slide block 22 that resets, the sliding action inclined-plane at dawn 12 coordinates with the driving inclined-plane of reset slide block 22, drive by reset slide block 22, the sliding dawn 12 is made to do transverse movement along the slideway compressed stent back-moving spring of reset cradle seat 20, support back-moving spring 13 is arranged between sliding dawn 12 and reset cradle seat 20, to drive sliding dawn transverse shifting.
As shown in Fig. 6, Fig. 7, Fig. 9, Figure 10 to Figure 12, electromagnetic release mechanism comprises the release electromagnet 15 be arranged on pcb board 30, this release electromagnet 15 comprises framework of trip coil 154, the tripping coil 152 be wrapped on this skeleton 154, the dropout iron core limiting plate 155 that is arranged on dropout iron core 151 in this skeleton 154 and dropout iron core return-spring 153, is arranged on this skeleton 154 rear end, and this dropout iron core return-spring 153 is between this dropout iron core 151 and this anti-misconnection iron core limiting plate 155; This dropout iron core 151 is under the effect of this dropout iron core return-spring 153, and its front end can coordinate with the interlock hole 143 of the reset locking hole 142 of the release link 14 of support resetting device and reset slide block 22 and this reset slide block 22 and this release link 14 locked together.Under this release electromagnet 15 "on" position, this dropout iron core 151 adsorbs this dropout iron core limiting plate 155 and compresses this dropout iron core return-spring 153 under the effect in this tripping coil 152 magnetic field, removes the locking of dropout iron core 151 front end to release link 14 and reset slide block 22.
After release link 14 is descending, its lower end can drive the reed switch 18 be arranged on pcb board 30 to disconnect.
As shown in Figure 10,11,12, reed switch 18 is arranged on the downside of pcb board 30.Before not driven, reed switch 18 is in closure state, and when reed switch 18 is subject to the compressing flex distortion of release link 14 lower end, its conducting trigger end is descending to be disconnected with pcb board.
As shown in Fig. 6 to Fig. 8, Figure 10 to Figure 12, anti-misconnection mechanism comprises anti-misconnection electromagnet 19 and is arranged on the position limiting structure that release link coordinates with the block piece 196 of this anti-misconnection electromagnet 19 anti-misconnection rod nose.This anti-misconnection electromagnet 19 comprises anti-misconnection coil rack 194, the anti-misconnection coil 192 be wrapped on this skeleton 194, the anti-misconnection iron core 191 be arranged in this skeleton 194, the block piece 196 being connected to this anti-misconnection iron core 191 front end and anti-misconnection iron core return-spring 193, be arranged on the anti-misconnection iron core limiting plate 195 of this skeleton 194 rear end, and this anti-misconnection iron core return-spring 193 is between this anti-misconnection iron core 191 and this anti-misconnection iron core limiting plate 195; Release link 14 correspondence is provided with and is engaged in release link 14 down direction with the block piece 196 of this anti-misconnection iron core 191 front end by the spacing position limiting structure of this anti-misconnection rod nose; This anti-misconnection iron core 191 stretches out by the effect of this anti-misconnection iron core return-spring 193, and the block piece 196 of its front end coordinates with the position limiting structure of this release link 14 and carries out spacing to this release link.
In the present embodiment, the position limiting structure of release link 14 is be arranged on the release link 14 correspondence position step that coordinate spacing with the block piece 196 of anti-misconnection iron core 191 front end, now the stopping means of anti-misconnection iron core is the block piece 196 of its front end, and this block piece 196 comprises the confined planes coordinated with the described step of release link 14.
In other embodiments, the position limiting structure of release link 14 can adopt the correspondence position being arranged on release link 14 hole that coordinate spacing with anti-misconnection rod nose, and now the stopping means of anti-misconnection iron core is its forward end.
In the present embodiment, the axis of the anti-misconnection iron core 191 of anti-misconnection electromagnet 19 is arranged along the parallel direction interval of dropout iron core 151 axis of release electromagnet 15.
In other embodiments, the axis of the anti-misconnection iron core 191 of anti-misconnection electromagnet 19 along the horizontally set of dropout iron core 151 axis of release electromagnet 15, also can realize the object of the invention.
Safety ground stoppage circuit breaker control method of the present invention controls above-mentioned safety ground stoppage circuit breaker of the present invention, and the method comprises:
The initial condition arranging safety ground stoppage circuit breaker is:
Reset key is up under action of reset spring is in initial position, the sliding dawn under support action of reset spring retrolisthesis from, make the conduction moving contact on the sliding dawn export fixed contact be separated with the conduction fixed contact on the electric conduction electrode-plate of left and right, wiring, the cunning dawn is in initial position.
The interlock hole of dropout iron core through reset slide block under the effect of dropout iron core return-spring of electromagnetic release mechanism release electromagnet is pressed in release link on the surface.
The anti-misconnection iron core of anti-misconnection mechanism anti-misconnection electromagnet stretches out in the effect of anti-misconnection iron core return-spring, and the stopping means of anti-misconnection rod nose is in the descending restraining position of the described release link of restriction, and safety ground stoppage circuit breaker is in initial condition.
Action control when safety ground stoppage circuit breaker correctly installs wiring:
After safety ground stoppage circuit breaker correct wiring, pressing reset key, overcoming back-moving spring elastic force by dynamic pressure makes reset key drive release link descending, when release link lower end is oppressed, reed switch is descending to be disconnected with pcb board, the MCU of safety ground stoppage circuit breaker circuit receives signal, sending instruction makes anti-misconnection electromagnet be energized, anti-misconnection coil produces magnetic field, make anti-misconnection iron core under the effect of electromagnetic force with the adhesive of anti-misconnection iron core limiting plate, compression anti-misconnection iron core return-spring is retracted, and that removes release link is spacing.
After the anti-misconnection iron core retraction of anti-misconnection electromagnet, release link continues under by dynamic pressure effect descending, when the reset locking hole in release link overlaps with the interlock hole of reset slide block, reset slide block and release link through the reset locking hole of release link, lock together by the dropout iron core of electromagnetic release mechanism release electromagnet under the effect of dropout iron core return-spring.
Remove the pressing force to reset key, reset key is up under action of reset spring, drives release link up with locked reset slide block; When the driving inclined-plane of reset slide block coordinates with the action inclined-plane at sliding dawn, the elastic force that the reset slider-actuated sliding dawn overcomes support back-moving spring moves forward, make the conduction moving contact on the sliding dawn export fixed contact with circuit breaker socket pole piece fixed contact and wiring and coordinate conducting, make safety ground stoppage circuit breaker present reset operating state.
Action control when safety ground stoppage circuit breaker mistake installs wiring:
When the input terminal incorrect polarity wiring of safety ground stoppage circuit breaker power supply, control circuit non-transformer, the control circuits such as MCU do not work; Pressing reset key, overcoming back-moving spring elastic force by dynamic pressure makes reset key drive release link descending, when release link lower end is oppressed, reed switch is descending to be disconnected with pcb board, because MCU does not have power supply cisco unity malfunction, triggering signal can not be exported, anti-misconnection electromagnet keeps the initial condition of power-off, the stopping means of the anti-misconnection rod nose of anti-misconnection electromagnet is in restraining position and carries out spacing to release link, stop release link to continue descending, make the locking that the dropout iron core of electromagnetic release mechanism release electromagnet cannot realize release link and reset slide block.
Protecting control when leak current fault appears in safety ground stoppage circuit breaker:
When the MCU of safety ground stoppage circuit breaker circuit has detected leakage current, electric leakage grounded inspection circuit makes electromagnetic release mechanism energising action, dropout iron core is bounced back under electromagnetic force, dropout rod nose portion departs from the reset locking hole of release link, reset key is up under action of reset spring together with release link, and reset slide block departs from reset cradle and is returned to initial condition under Compress Spring effect; Because reset slide block is returned to initial condition; remove the driving to the sliding dawn; the sliding dawn is rear sliding under support action of reset spring; conduction moving contact on the sliding dawn exports fixed contact with circuit breaker socket pole piece fixed contact with wiring and is separated; disconnect the connection of safety ground stoppage circuit breaker input and socket output, wiring output, realize earth leakage protective.
Claims (6)
1. a safety ground stoppage circuit breaker, the breaker circuit comprising base, upper cover, support resetting device, electromagnetic release mechanism, contact assembly, grounding assembly, power supply input coupling assembling, output coupling assembling, pcb board and be arranged on this pcb board, this breaker circuit comprises power circuit, electric leakage grounded inspection circuit, signal amplification shaping circuit, single chip machine controlling circuit, power detecting and working indicating and tripping mechanism control circuit;
Described support resetting device comprises the reset cradle seat be arranged on this pcb board, the sliding dawn be arranged on this reset cradle seat, support back-moving spring, reset key, back-moving spring, release link, reset slide block and the Compress Spring that is arranged in reset slide block, this cunning dawn comprises transversely slip and exports the conduction moving contact that fixed contact coordinates, the action inclined-plane coordinated with the driving inclined-plane of described reset slide block with circuit breaker socket pole piece fixed contact and wiring, support back-moving spring is arranged between this cunning dawn and reset cradle seat, drives sliding dawn transverse shifting;
Described electromagnetic release mechanism comprises the release electromagnet be arranged on this pcb board, this release electromagnet comprises framework of trip coil, the tripping coil be wrapped on this skeleton, the dropout iron core limiting plate that is arranged on this intraskeletal dropout iron core and dropout iron core return-spring, is arranged on this skeleton rear end, and this dropout iron core return-spring is between this dropout iron core and this anti-misconnection iron core limiting plate; This dropout iron core its front end under the effect of this dropout iron core return-spring can coordinate with the interlock hole of the reset locking hole of the release link of described support resetting device and reset slide block and this reset slide block and this release link locked together, under this release electromagnet "on" position, this dropout iron core adsorbs this dropout iron core limiting plate and compresses this dropout iron core return-spring under the effect in this tripping coil magnetic field, removes the locking to described release link and reset slide block of dropout rod nose;
This release link lower end can drive the reed switch be arranged on described pcb board to disconnect;
It is characterized in that, this safety ground stoppage circuit breaker also comprises anti-misconnection mechanism, this anti-misconnection mechanism comprises anti-misconnection electromagnet, this anti-misconnection electromagnet comprises anti-misconnection coil rack, the anti-misconnection coil be wrapped on this skeleton, be arranged on this intraskeletal anti-misconnection iron core and anti-misconnection iron core return-spring, be arranged on the anti-misconnection iron core limiting plate of this skeleton rear end and be arranged on this and misplace the stopping means connecing rod nose, and this anti-misconnection iron core return-spring is between this anti-misconnection iron core and this anti-misconnection iron core limiting plate; Described release link comprises and to be engaged in down direction with the stopping means of this anti-misconnection rod nose by the spacing position limiting structure of the stopping means of this anti-misconnection rod nose; This anti-misconnection iron core stretches out by this anti-misconnection iron core return-spring effect, and the stopping means of its front end coordinates with this release link position limiting structure and carries out spacing to this release link;
Described breaker circuit comprises the false wiring protective circuit be connected with described single chip machine controlling circuit, this false wiring protective circuit comprises described anti-misconnection electromagnet, rectification circuit, one-way SCR and regulating resistor, the high potential input of this rectification circuit connects the civil power live wire incoming end of this breaker circuit, electronegative potential output connects this anti-misconnection magnet spool one end, this anti-misconnection magnet spool other end connects the anode of this one-way SCR, the minus earth of this one-way SCR, trigger end connects single-chip microcomputer triggering signal three end of this breaker circuit, this regulating resistor is connected between the trigger end of this one-way SCR and ground.
2. safety ground stoppage circuit breaker as claimed in claim 1, it is characterized in that, the position limiting structure of described release link is be arranged on the release link correspondence position step that coordinate spacing with described anti-misconnection rod nose, the stopping means of described anti-misconnection rod nose is the block piece being connected to this anti-misconnection rod nose, and this block piece comprises the confined planes coordinated with the described step of this release link.
3. safety ground stoppage circuit breaker as claimed in claim 2, it is characterized in that, the position limiting structure of described release link is be arranged on the release link correspondence position hole that coordinate spacing with described anti-misconnection rod nose, and the stopping means of described anti-misconnection rod nose is the forward end of this anti-misconnection iron core.
4. the safety ground stoppage circuit breaker as described in one of claims 1 to 3, it is characterized in that, the parallel direction interval of the horizontally set of axis along the dropout iron core axis of described release electromagnet of the anti-misconnection iron core of described anti-misconnection electromagnet or the dropout iron core axis along described release electromagnet is arranged.
5. a safety ground stoppage circuit breaker control method, safety ground stoppage circuit breaker, as described in one of claims 1 to 3, is characterized in that, the method comprises:
Arranging initial condition is:
Reset key is up under action of reset spring is in initial position, the sliding dawn under support action of reset spring retrolisthesis from, make the conduction moving contact on the sliding dawn export fixed contact be separated with the conduction fixed contact on the electric conduction electrode-plate of left and right, wiring, the cunning dawn is in initial position;
The interlock hole of dropout iron core through reset slide block under the effect of dropout iron core return-spring of electromagnetic release mechanism release electromagnet is pressed in release link on the surface;
The anti-misconnection iron core of anti-misconnection mechanism anti-misconnection electromagnet stretches out in the effect of anti-misconnection iron core return-spring, and the stopping means of anti-misconnection rod nose is in the descending restraining position of the described release link of restriction, and safety ground stoppage circuit breaker is in initial condition;
Correct wiring action control:
After safety ground stoppage circuit breaker correct wiring, pressing reset key, overcoming back-moving spring elastic force by dynamic pressure makes reset key drive release link descending, when release link lower end is oppressed, reed switch is descending to be disconnected with pcb board, the MCU of safety ground stoppage circuit breaker circuit receives signal, sending instruction makes anti-misconnection electromagnet be energized, anti-misconnection coil produces magnetic field, make anti-misconnection iron core under the effect of electromagnetic force with the adhesive of anti-misconnection iron core limiting plate, compression anti-misconnection iron core return-spring is retracted, and that removes release link is spacing;
After the anti-misconnection iron core retraction of anti-misconnection electromagnet, release link continues under by dynamic pressure effect descending, when the reset locking hole in release link overlaps with the interlock hole of reset slide block, reset slide block and release link through the reset locking hole of release link, lock together by the dropout iron core of electromagnetic release mechanism release electromagnet under the effect of dropout iron core return-spring;
Remove the pressing force to reset key, reset key is up under action of reset spring, drives release link up with locked reset slide block; When the driving inclined-plane of reset slide block coordinates with the action inclined-plane at sliding dawn, the elastic force that the reset slider-actuated sliding dawn overcomes support back-moving spring moves forward, make the conduction moving contact on the sliding dawn export fixed contact with circuit breaker socket pole piece fixed contact and wiring and coordinate conducting, make safety ground stoppage circuit breaker present reset operating state;
False wiring action control:
When the input terminal incorrect polarity wiring of safety ground stoppage circuit breaker power supply, control circuit non-transformer does not work; Pressing reset key, overcoming back-moving spring elastic force by dynamic pressure makes reset key drive release link descending, when release link lower end is oppressed, reed switch is descending to be disconnected with pcb board, anti-misconnection electromagnet keeps the initial condition of power-off, the stopping means of the anti-misconnection rod nose of anti-misconnection electromagnet is in restraining position and carries out spacing to release link, stop release link to continue descending, make the locking that the dropout iron core of electromagnetic release mechanism release electromagnet cannot realize release link and reset slide block;
Earth leakage protective controls:
When the MCU of safety ground stoppage circuit breaker circuit has detected leakage current, electric leakage grounded inspection circuit makes electromagnetic release mechanism energising action, dropout iron core is bounced back under electromagnetic force, dropout rod nose portion departs from the reset locking hole of release link, reset key is up under action of reset spring together with release link, and reset slide block departs from reset cradle and is returned to initial condition under Compress Spring effect; Because reset slide block is returned to initial condition; remove the driving to the sliding dawn; the sliding dawn is rear sliding under support action of reset spring; conduction moving contact on the sliding dawn exports fixed contact with circuit breaker socket pole piece fixed contact with wiring and is separated; disconnect the connection of safety ground stoppage circuit breaker input and socket output, wiring output, realize earth leakage protective.
6. safety ground stoppage circuit breaker control method as claimed in claim 5, it is characterized in that, safety ground stoppage circuit breaker as claimed in claim 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510676381.XA CN105304425B (en) | 2015-10-16 | 2015-10-16 | A kind of safety ground stoppage circuit breaker and its control method |
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| CN201510676381.XA CN105304425B (en) | 2015-10-16 | 2015-10-16 | A kind of safety ground stoppage circuit breaker and its control method |
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| CN105304425A true CN105304425A (en) | 2016-02-03 |
| CN105304425B CN105304425B (en) | 2017-08-25 |
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| CN107302209A (en) * | 2017-06-12 | 2017-10-27 | 张家港市佰瑞普电器科技有限公司 | A kind of earth fault earth leakage protective device |
| CN111383862A (en) * | 2018-12-28 | 2020-07-07 | 龙岩烟草工业有限责任公司 | Relay protection resetting means and tobacco processing equipment's air compressor |
| CN113903633A (en) * | 2021-09-24 | 2022-01-07 | 江苏佰瑞普智能科技有限公司 | Earth fault circuit break protector for fault wiring circuit break protection |
| CN115662813A (en) * | 2022-11-16 | 2023-01-31 | 盐城市瑞恒电力石化设备有限公司 | Park construction emergency circuit protection device with electric shock protection function |
| CN116798827A (en) * | 2023-07-20 | 2023-09-22 | 温州方特电气有限公司 | Two-section conductor type ground fault circuit breaker with reverse wiring protection function |
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| CN116798827A (en) * | 2023-07-20 | 2023-09-22 | 温州方特电气有限公司 | Two-section conductor type ground fault circuit breaker with reverse wiring protection function |
| CN116798827B (en) * | 2023-07-20 | 2023-12-29 | 温州方特电气有限公司 | Two-section conductor type ground fault circuit breaker with reverse wiring protection function |
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