CN1815664A - Intellight earth-fault circuit breaker with reverse connection protection - Google Patents
Intellight earth-fault circuit breaker with reverse connection protection Download PDFInfo
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- CN1815664A CN1815664A CN 200510007236 CN200510007236A CN1815664A CN 1815664 A CN1815664 A CN 1815664A CN 200510007236 CN200510007236 CN 200510007236 CN 200510007236 A CN200510007236 A CN 200510007236A CN 1815664 A CN1815664 A CN 1815664A
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Abstract
The disclosed ground fault circuit interrupter includes an actuating mechanism. The actuating mechanism includes following parts: a permanent magnet located at place near to a soft magnet; being positioned inside a sleeve, a soft magnet drives moving contact move up down under action of magnetic force; a closing coil is wrapped on one end of the sleeve near to the permanent magnet; a breaking winding is wrapped on the other end of the sleeve far apart from the permanent magnet; a unit for adjusting balanced static pressure between contacts; through adjusting block in the unit, the integrated balancing adjustment rack and soft magnet make reliable contact between moving contact point and static contact point; piezoresistor fail safe unit in use for detecting ineffective leakage current of piezoresistor to cutting off loop of power line for piezoresistor.
Description
Technical field
The present invention relates to a kind of earth fault protection, particularly relate to a kind of intelligent ground-fault interrupter with reverse-connection protection.
Background technology
Because ground-fault interrupter can effectively prevent personal electric shock, electric equipment and fire incident.Thereby be used widely.
Ground-fault interrupter is implemented the earth fault short-circuit protection by actuating mechanism, that is, and and under normal condition; keep the energising contacting by the magneticaction after the solenoid energising; and when earth fault takes place,, disconnect the energising contact by cutting off the working power of solenoid.This shows that present ground-fault interrupter needs the electric energy of consumes considerable to keep the operate as normal of circuit breaker.
In addition, when the needs reverse-connection protection, GFCI (ground-fault interrupter) panel jack is not charged; so GFCI must have four pairs of silver tipped contacts, still, when practical operation; these four pairs of silver tipped contacts often can not all reliably contact owing to reasons such as tolerances, so that cause cisco unity malfunction.
On the other hand, piezo-resistance (MOV) is the inner critical elements of GFCI (ground-fault interrupter), usually be connected in parallel on the power line input, its effect absorbs surge voltage, but because of the quality problems of piezo-resistance own, wear out and temperature, humidity changes, and all can cause the piezo-resistance performance change, in some cases, even also can blast, cause fire.At present, the various technical schemes that address the above problem mainly concentrate on the aspect of performance of piezo-resistance, promptly improve the life-span and the performance of piezo-resistance, but still can not solve the aging and problem that lost efficacy of piezo-resistance.
Summary of the invention
The purpose of this invention is to provide a kind of intelligent ground-fault interrupter that addresses the above problem with reverse-connection protection.
Above-mentioned purpose of the present utility model is achieved in that a kind of intelligent ground-fault interrupter with reverse-connection protection, comprising:
The actuating mechanism of a ground-fault interrupter comprises:
A permanent magnet (202) is positioned at the position contiguous with a soft magnetic bodies (312);
A soft magnetic bodies (312) is positioned at a sleeve, and this soft magnetic bodies (312) drives moving contact (305) and moves up and down under the effect of magnetic force;
A closing coil (310) is wrapped in an end of the nearly permanent magnet (202) of sleeve;
A broken coil (311) is wrapped in an end of the permanent magnet far away (202) of sleeve;
The balanced adjusting device (308) of contact static pressure forms one with soft magnetic bodies, by the adjustment piece (309) that sets within it, adjusts moving contact and contacts with the reliable of fixed contact; And
A pressure responsive resistor failure protective device is by detecting the inefficacy leakage current of piezo-resistance, the power line loop that cuts off piezo-resistance.
Wherein, when closing coil (310) short time switches on, draw magnetic force on producing one, make on the soft magnetic bodies and move,, make soft magnetic bodies (312) drive moving contact (305) thus and contact with fixed contact (203) with the permanent magnet adhesive; When broken coil (311) short time switches on, produce a drop-down magnetic force, soft magnetic bodies (312) is moved down, separate with permanent magnet (202), make soft magnetic bodies (312) drive moving contact (305) thus and disengage with fixed contact (203).
Wherein, be provided with a retainer spring (307) in the described sleeve, the fixedly connected sleeve of one end, the fixedly connected soft magnetic bodies of its other end (312), like this when broken coil (311) is switched on, utilize the recovery elastic force of broken coil (311) and retainer spring (307), make soft magnetic bodies (307) break away from permanent magnet (202).
Wherein, described soft magnetic bodies (312) is the soft magnetism rod.
This shows that two coils of the actuating mechanism of ground-fault interrupter of the present invention are consumed power at short notice only, and be that zero-power is connected during connecting, therefore can save a large amount of energy.
In addition, the contact balanced adjusting device of static pressure of the present invention (308) comprising:
Four fixed contacts split the both sides at sleeve in twos;
Four moving contacts split the both sides at sleeve in twos, and relative with four fixed contacts;
A balance adjustment rack, be socketed on the soft magnetic bodies, the two ends of this balance adjustment rack are provided with storage tank respectively, place in it and adjust piece, when balancing stand with soft magnetic bodies on the moving moving contact of shipper pole when contacting with fixed contact, this adjusts piece under the downforce effect of a fixed contact to a moving contact, adjusts the contact force of another moving contact and another fixed contact.
Wherein, the bottom of described adjustment piece (309) is provided with the central pivot point of a projection.
Wherein, the storage tank of described balance adjustment rack (308) has a depression that adapts with the central pivot point of adjusting piece (309).
Wherein, the size of described adjustment piece is enough to make it to swing in storage tank.
The present invention realizes that by the principle of static pressure balance moving contact contacts with the reliable of fixed contact, just, balance in the storage tank of balancing stand (308) is adjusted an end of piece 309 under the suppressing action of the static pressure of a fixed contact, make other end perk, thereby force another moving contact reliably to contact with another fixed contact, this is similar to the principle of seesaw, and an end presses down and makes other end perk.Therefore the present invention can realize that whole moving contacts contact with whole the reliable of fixed contact.
In addition, pressure responsive resistor failure protective device of the present invention comprises:
A piezo-resistance, an end connects the input of a power line, and the other end connects another power line by the disconnect of tripper;
The failure detection device of a piezo-resistance comprises a detector that detects the piezo-resistance leakage current, when piezo-resistance leakage current that described detector detected reaches predetermined value, exports a triggering signal;
A tripper connects the trigger end of the failure detection device of described piezo-resistance, under the excitation of described triggering signal, disconnects described disconnect;
A pressure responsive resistor failure display unit comprises indicator light switch and indicator light by described tripper control.
Wherein, the failure detection device of described piezo-resistance also comprises a comparator, and piezo-resistance leakage current value and threshold value that is detected compared.
Wherein, described detector is a magnetic test coil.
Wherein, described detector is the resistance of connecting with piezo-resistance.
Wherein, described tripper is controllable silicon and the broken coil that is connected in series.
The present invention utilizes the failure detection device of quick resistance, the leakage current that is produced when detecting pressure responsive resistor failure.When leakage current arrives certain value; this failure detection device triggers tripper work, cutting off power line to the formed electric loop of piezo-resistance, thereby realizes the protection to piezo-resistance; pass through pressure responsive resistor failure display unit, the warning of sending pressure responsive resistor failure simultaneously.
Another aspect, pressure responsive resistor failure protective device of the present invention comprises:
A piezo-resistance MOV1, an end connects the input of a power line, and the other end is connected the power line that another passes ground detection device by described moving contact with the contact of fixed contact;
Ground detection device N1 detects by unsymmetrical current, detection of ground faults electric current and piezo-resistance leakage current, and output fault detection signal;
Fault trigger module IC receives the fault detection signal that ground detection device N1 is exported, when described fault detection signal during greater than threshold value, and the output triggering signal;
The ground fault open circuit final controlling element, comprise broken coil J2 and controllable silicon VD7, the triggering signal conducting that controllable silicon VD7 is exported by the fault trigger module makes broken coil J2 energising produce disjunction magnetic field, and the moving contact of circuit breaker and the fixed contact of energising are disconnected;
A pressure responsive resistor failure display unit comprises K switch 4 and indicator light by described broken coil control, as light-emitting diode.
From as can be known above-mentioned, two coils of the actuating mechanism of ground-fault interrupter of the present invention are consumed power at short notice only, and is that zero-power is connected during connecting, and therefore can save a large amount of energy.
In addition, the present invention realizes that by the principle of static pressure balance moving contact contacts with the reliable of fixed contact, just, balance in the storage tank of balancing stand (308) is adjusted an end of piece 309 under the suppressing action of the static pressure of a fixed contact, make other end perk, thereby force another moving contact reliably to contact with another fixed contact, this is similar to the principle of seesaw, and an end presses down and makes other end perk.Therefore the present invention can realize that whole moving contacts contact with whole the reliable of fixed contact.
In addition, the present invention utilizes the failure detection device of quick resistance, the leakage current that is produced when detecting pressure responsive resistor failure.When leakage current arrives certain value; this failure detection device triggers tripper work, cutting off power line to the formed electric loop of piezo-resistance, thereby realizes the protection to piezo-resistance; pass through pressure responsive resistor failure display unit, the warning of sending pressure responsive resistor failure simultaneously.
The present invention is described in detail below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the stereoscopic figure of GFCI socket of the present invention;
Fig. 2 is the installation decomposition view of GFCI of the present invention;
Relational view when Fig. 3 is a GFCI actuating mechanism disjunction state of the present invention;
Relational view when Fig. 4 is a GFCI actuating mechanism on-state of the present invention;
Fig. 5 is that GFCI actuating mechanism critical piece balancing stand of the present invention and balancing stand are adjusted the piece relational view;
Wherein Fig. 5 a has shown the structure of balancing stand; Fig. 5 b has shown when moving on balancing stand is not, the relation of moving contact and fixed contact; Fig. 5 c has shown when moving on the balancing stand, the moving contact when the adjustment piece does not adjust and the relation of fixed contact; Fig. 5 d has shown the relation of adjusting adjusted moving contact of piece and fixed contact;
Fig. 6 is a GFCI circuit diagram of the present invention.
Embodiment
Below the contrast accompanying drawing describes mechanism of the present invention matching relationship in detail, course of action and electricity work principle.
Fig. 1 is the stereoscopic figure of GFCI socket of the present invention, wherein 104 is reset key (RESET), and 105 is feeler switch (TEST), and 102 is supply hub, 103 is earth jack, 106 is indicator light, and 107 are ground connection installation iron plate, and 101 is top cover, 403 is power supply (LINE) terminal screw, (another does not show on the GFCI opposite), 402 are load wiring screw (another does not show on the GFCI opposite), and 401 is pedestal.
Fig. 2 can find out GFCI substantially by 101 head components for the exploded perspective view of GFCI socket of the present invention from figure, 201 partition components, and 301 circuit board components, 401 base components are formed.
The formation of GFCI four elements below is described, form, fit, and function.
Head components is by plastic roof 101, supply hub 102, and reset key (RESET) 104, feeler switch (TEST) 105 and indicator light 106 constitute.
Feeler switch is to establish 8mA fault current routine test GFCI performance, hinders electric current or other reasons for some reason and makes the GFCI disjunction, after its earth fault is got rid of, makes GFCI recover operate as normal with reset key.
Partition component 201 comprises:
The permanent magnet 202 of the critical piece band radome of GFCI actuating mechanism is put into balance rack assembly 304 GFCI of the mechanism actuating mechanisms of corresponding circular hole and 301 parts, and static contact 203 snaps in the holddown groove 205, and 204 is the leaded light post, and 206 is test pieces.
Circuit board component 301 comprises:
301 circuit board components are the important composition parts of GFCI, are made of magnet ring assembly 302, movable contact spring 305, power supply terminal 303, circuit board 301 and actuating mechanism parts 304.
Describe the formation of actuating mechanism parts 304, position and course of action between each parts in detail below with reference to Fig. 3 and Fig. 4.
The actuating mechanism of ground-fault interrupter of the present invention comprises:
A permanent magnet 202 is positioned at the position with a soft magnetic bodies 312 vicinities;
A soft magnetic bodies 312 is positioned at a sleeve, and this soft magnetic bodies 312 drives moving contact 305 and moves up and down under the effect of magnetic force;
A closing coil 310 is wrapped in an end of the nearly permanent magnet 202 of sleeve;
A broken coil 311 is wrapped in an end of the permanent magnet far away 202 of sleeve;
Wherein, when 310 short time of closing coil switch on, draw magnetic force on producing one, make on the soft magnetic bodies and move,, make soft magnetic bodies 312 drive moving contacts 305 thus and contact with fixed contact 203 with the permanent magnet adhesive; When 311 short time of broken coil switch on, produce a drop-down magnetic force, soft magnetic bodies 312 is moved down, separate with permanent magnet 202, make soft magnetic bodies 312 drive moving contact 305 thus and disengage with fixed contact 203.
Wherein, be provided with a retainer spring 307 in the described sleeve, the fixedly connected sleeve of one end, the fixedly connected soft magnetic bodies 312 of its other end.When broken coil 311 energisings, can utilize the recovery elastic force of broken coil 311 and retainer spring 307 like this, make soft magnetic bodies 307 break away from permanent magnet 202.
Wherein, described soft magnetic bodies 312 forms one with balancing stand 308.
Wherein, the both sides of described balancing stand 308 are respectively equipped with the balance of insulation and adjust piece 309, and described soft magnetic bodies 312 is adjusted piece 309 drive moving contacts 305 by balance and moved.
Wherein, described soft magnetic bodies 312 is soft magnetism rods.
Because two coils of the actuating mechanism of ground-fault interrupter of the present utility model are consumed power at short notice only, is that zero-power is connected during connecting, and therefore can save a large amount of energy.
Because the utility model is during reseting period and error protection, only therefore consumed power at short notice can save a large amount of energy.
During initial condition, under retainer spring 307 effects, GFCI punishes disconnected state as described in Figure 3, (K3 in respect to accompanying drawing 6) closing coil 310 (coil J1 in respect to accompanying drawing 6) is charged when pressing reset key (RESET), draws magnetic field in the formation, under the magneticaction in this magnetic field, soft magnetism rod 312 moves on rapidly, make soft magnetism rod 312 and permanent magnet 202 adhesives, because of balancing stand 308 be an one with soft magnetism rod 312, thereby balance goes up shipper pole simultaneously and moves on the movable contact spring 305 and move.Finish GFCI with static contact 203 connections and connect process, its on-state as shown in Figure 4.
Otherwise, when hindering electric current and other reasons for some reason, make broken coil 312 charged, form drop-down magnetic field, this moment, soft magnetic bodies 312 drop-down electromagnetic forces and retainer spring 307 were combined into greater than permanent magnet and soft magnetic bodies the suction-combining force, balancing stand were moved down, to making the GFCI disjunction rapidly.
Can find out that from last surface analysis just the actuating mechanism characteristics are: 1, GFCI connects and keeps relying on the electromagnetism the suction-combining force of permanent magnet and soft magnetic bodies, does not need the closing coil energising thereby does not have power consumption.2, different other GFCI of GFCI connect with mechanical force, are suitable for Long-distance Control and connect disjunction with electromagnetic force.
Static pressure balanced adjusting device in contact of the present invention comprises (referring to Fig. 5): a balance adjustment rack 308, be socketed in soft magnetic bodies 312 (referring to Fig. 5 a) on, the two ends of this balance adjustment rack 308 are provided with storage tank respectively, place in it and adjust piece 309, when balancing stand 308 with soft magnetic bodies on the moving moving contact 305 of shipper pole when contacting with fixed contact 203, this adjusts piece 309 under the downforce effect of a fixed contact (for example right-hand member fixed contact 203 of Fig. 5 c) to a moving contact, adjusts the contact force of another moving contact and another fixed contact (for example left end fixed contact 203 of Fig. 5 c).
Wherein, the bottom of described adjustment piece 306 is provided with the central pivot point of a projection;
Wherein, the storage tank of described balance adjustment rack 308 has a depression that adapts with the central pivot point of adjusting piece.
Wherein, the size of described adjustment piece is enough to make it to swing in storage tank.
Fig. 5 has shown and utilizes static pressure balance principle of the present invention to realize the graph of a relation that moving contact of the present invention and fixed contact reliably contact.
Referring to Fig. 5 a, balance adjustment rack 308 is socketed on the soft magnetic bodies 312, and the two ends of this balance adjustment rack 308 are provided with storage tank respectively, places in it and adjusts piece 309.
Referring to Fig. 5 b, when balancing stand 308 moved on not, moving contact 305 did not contact with fixed contact 203.
Referring to Fig. 5 c, when balancing stand 308 with soft magnetic bodies on the moving moving contact 305 of shipper pole when contact with fixed contact 203, moving contact of these adjustment piece 309 drives contacts with a fixed contact, another moving contact is then waited for another fixed contact and being contacted.
Under the downforce effect of a fixed contact (for example right-hand member fixed contact 203 of Fig. 3 c), adjust piece 309 other end perks to a moving contact.Another moving contact is reliably contacted with another fixed contact (for example left end fixed contact 203 of Fig. 3 c).Thereby form referring to the reliable state of contact of two docking points shown in Fig. 5 d,
This shows, the present invention realizes that by the principle of static pressure balance moving contact contacts with the reliable of fixed contact, just, balance in the storage tank of balancing stand 308 is adjusted an end of piece 309 under the suppressing action of the static pressure of a fixed contact, make other end perk, thereby force another moving contact reliably to contact with another fixed contact, this is similar to the principle of seesaw, and an end presses down and makes other end perk.Therefore the present invention can realize that whole moving contacts contact with whole the reliable of fixed contact.
The present invention judges the current performance of piezo-resistance by detecting the normal leakage current of piezo-resistance in real time, so that in time change piezo-resistance aging or that lost efficacy, thereby avoids the Problem of Failure of piezo-resistance in the ground-fault interrupter.
The device of avoiding pressure responsive resistor failure of the present invention comprises:
A piezo-resistance (as the piezo-resistance MOV1 among Fig. 6), an end connects the input of a power line, and the other end is connected another power line by the disconnect (that is, moving contact and fixed contact) of short-circuiting means;
The failure detection device of a piezo-resistance, comprise a detector (as the magnetic test coil N1 among Fig. 6) that detects the piezo-resistance leakage current, when piezo-resistance leakage current that described detector detected reaches predetermined value, export a triggering signal (triggering signal of IC the 7th pin output as described in Figure 6);
A tripper (as controllable silicon DV7 and the broken coil J2 of Fig. 6), the trigger end (IC the 7th pin as described in Figure 6) that connects the failure detection device of described piezo-resistance, under the effect of described triggering signal, disconnect described disconnect (that is, moving contact and fixed contact);
A pressure responsive resistor failure display unit comprises indicator cock (as the K switch among Fig. 1 4) and indicator light ((as the light-emitting diode among Fig. 6) by described tripper control.
The failure detection device of described piezo-resistance also comprises a comparator (in be built within the IC), and piezo-resistance leakage current value and threshold value that is detected compared.
The detector of described detection piezo-resistance leakage current both can be a magnetic test coil, also can be the resistance (not shown) of connecting with piezo-resistance.
Described tripper is controllable silicon DV7 and the broken coil J2 that is connected in series.
The present invention utilizes the failure detection device of quick resistance, the leakage current that is produced when detecting pressure responsive resistor failure.When leakage current arrives certain value; this failure detection device triggers tripper work, cutting off power line to the formed electric loop of piezo-resistance, thereby realizes the protection to piezo-resistance; pass through pressure responsive resistor failure display unit, the warning of sending pressure responsive resistor failure simultaneously.
In a specific embodiment of ground-fault interrupter of the present invention, avoid the device of pressure responsive resistor failure, comprising:
A piezo-resistance MOV1, an end connects the input of a power line, and the other end is connected the power line that another passes ground detection device by described moving contact with the contact of fixed contact;
Ground detection device N1 detects by unsymmetrical current, detection of ground faults electric current and piezo-resistance leakage current, and output fault detection signal;
Fault trigger module IC receives the fault detection signal that ground detection device N1 is exported, when described fault detection signal during greater than threshold value, and the output triggering signal;
The ground fault open circuit final controlling element, comprise broken coil J2 and controllable silicon VD7, the triggering signal conducting that controllable silicon VD7 is exported by the fault trigger module makes broken coil J2 energising produce disjunction magnetic field, and the moving contact of circuit breaker and the fixed contact of energising are disconnected;
A pressure responsive resistor failure display unit comprises K switch 4 and indicator light by described broken coil control, as light-emitting diode.
Wherein, the present invention also comprises a neutral misconnection ground protective device N2, when misconnection ground phenomenon takes place, to fault trigger module IC output fault detection signal.
Wherein, described ground fault detection device is zero sequence current mutual inductor N
1, described neutral misconnection ground protective device is neutral misconnection ground protection coil N
2, coil N wherein
1N
2Constitute transformer-coupled oscillator, when neutral misconnection ground phenomenon takes place, this oscillator starting of oscillation, when amplitude reached fault trigger module IC threshold values, fault trigger module pin IC 7 output signals made the GFCI disjunction.
The present invention is utilized as ground detection device N1 the failure detection device of piezo-resistance.When the piezo-resistance leakage current that detects arrives certain value; fault trigger module IC triggers final controlling element (VD7, J2) work; to cut off power line to the formed electric loop of piezo-resistance; thereby realize protection to piezo-resistance; pass through pressure responsive resistor failure display unit, the warning of sending pressure responsive resistor failure simultaneously.
Below in conjunction with Fig. 6 the circuit theory of GFCI of the present invention is elaborated
The GFCI circuit is by transducer, electronic circuit, and ground fault detection circuit and action controlling organization are formed.
Transducer is by detecting magnet ring (zero sequence current mutual inductor) N
1With neutral misconnection ground protection coil N
2Form.
Electronic circuit is by DC power supply, the IC amplifying circuit, and neutral misconnection ground protective circuit, GFCI connects circuit, disjunction control circuit composition.
Coil J
2One end is connected with LINE, the other end and diode D
1Anodal linking to each other.D1 other end IC 5 pin connect, and power supply is through diode D
1Rectification is for the about 27V working dc power of IC.
(RESET) button K resets
3One end and D
1Negative terminal connects, the other end and capacitor C
7And resistance R
4Connect capacitor C
7And resistance R
4The other end and capacitor C
8And resistance R
3Connect capacitor C
8And resistance R
3Other end ground connection is worked as K
3When pressing, connect circuit and produce a pulse enable signal SCR VD
5Conducting, closing coil J
1Charged, GFCI connects.
Detect magnet ring N
1One end is connected the other end and is connected resistance R through resistance R 1 with IC 2 pin with IC 3 pin
2One end is connected with IC 1 pin, and the R2 other end is connected with IC 2 pin.Broken coil J2 one end is connected with power supply, and the J2 other end is connected with controllable silicon VD7 one end, controllable silicon VD7 other end ground connection, and controllable silicon VD7 trigger electrode is connected with IC 7 pin.When earth fault current, detect magnet ring secondary induced signal and amplify through IC, it reaches set point (being generally 5mA), IC 7 pin output triggering signal, controllable silicon VD7 conducting, broken coil is charged, makes the GFCI disjunction.
R
2Value is determined GFCI disjunction fault current size.
Coil N
1N
2Constitute transformer-coupled oscillator, when neutral misconnection ground phenomenon took place, this oscillator is super to shake, and when amplitude reached the IC threshold values, IC 7 pin output signals made the GFCI disjunction.
Piezo-resistance (MOV) is the inner critical elements of GFCI, its effect absorbs surge voltage, but because of the quality problems of piezo-resistance own, wear out and temperature, humidity changes, the capital causes the piezo-resistance performance change, can cause that thus GFCI lost efficacy, even burn the generation of phenomenon, change the connection of traditional pressure sensitive resistance (MOV) for this reason, press every quick resistance (MOV) termination power end, and another termination GFCI output, because of the normal leakage current of piezo-resistance (MOV) is that μ A magnitude can not influence the GFCI operate as normal.GFCI disjunction when reaching 5mA because of the increase of a variety of causes piezo-resistance leakage current, simultaneously piezo-resistance (MOV) disconnects simultaneously, makes the GFCI disjunction like this, protects again that piezo-resistance is not breakdown burns.
Claims (14)
1, a kind of intelligent ground-fault interrupter with reverse-connection protection comprises:
The actuating mechanism of a ground-fault interrupter comprises: a permanent magnet (202) is positioned at the position contiguous with a soft magnetic bodies (312);
A soft magnetic bodies (312) is positioned at a sleeve, and this soft magnetic bodies (312) drives moving contact (305) and moves up and down under the effect of magnetic force;
A closing coil (310) is wrapped in an end of the nearly permanent magnet (202) of sleeve;
A broken coil (311) is wrapped in an end of the permanent magnet far away (202) of sleeve;
The balanced adjusting device of contact static pressure, its balance adjustment rack (308) forms one with soft magnetic bodies, by the adjustment piece (309) that sets within it, adjusts moving contact and contacts with the reliable of fixed contact; And
A pressure responsive resistor failure protective device is by detecting the inefficacy leakage current of piezo-resistance, the power line loop that cuts off piezo-resistance.
2, ground-fault interrupter according to claim 1, wherein, when closing coil (310) short time switches on, draw magnetic force on producing one, make on the soft magnetic bodies and move,, make soft magnetic bodies (312) drive moving contact (305) thus and contact with fixed contact (203) with the permanent magnet adhesive; When broken coil (311) short time switches on, produce a drop-down magnetic force, soft magnetic bodies (312) is moved down, separate with permanent magnet (202), make soft magnetic bodies (312) drive moving contact (305) thus and disengage with fixed contact (203).
3, ground-fault interrupter according to claim 1 wherein, is provided with a retainer spring (307) in the described sleeve, the fixedly connected sleeve of one end, the fixedly connected soft magnetic bodies of its other end (312).
4, ground-fault interrupter according to claim 1, wherein, described soft magnetic bodies (312) is the soft magnetism rod.
5, ground-fault interrupter according to claim 1, wherein, static pressure balanced adjusting device in described contact comprises:
Four fixed contacts (202) split the both sides at sleeve in twos; 3
Four moving contacts (305) split the both sides at sleeve in twos, and relative with four fixed contacts (203);
A balance adjustment rack (308), be socketed on the soft magnetic bodies (312), the two ends of this balance adjustment rack (308) are provided with storage tank respectively, place in it and adjust piece (309), when balancing stand (308) with soft magnetic bodies on the moving moving contact (305) of shipper pole and fixed contact (203) when contacting, this adjusts piece (309) in the downforce effect other end perk of a fixed contact (203) to a moving contact (305), forces another moving contact (305) reliably to contact with another fixed contact (203) thus.
6, ground-fault interrupter according to claim 5, wherein, the bottom of described adjustment piece (309) is provided with the central pivot point of a projection.
7, ground-fault interrupter according to claim 5, wherein, the storage tank of described balance adjustment rack (308) has a depression that adapts with the central pivot point of adjusting piece (309).
8, ground-fault interrupter according to claim 1, wherein, the size of described adjustment piece is enough to make it to swing in storage tank.
9, ground-fault interrupter according to claim 1, wherein said pressure responsive resistor failure protective device comprises:
A piezo-resistance, an end connects the input of a power line, and the other end connects another power line by the disconnect of tripper;
The failure detection device of a piezo-resistance comprises a detector that detects the piezo-resistance leakage current, when piezo-resistance leakage current that described detector detected reaches predetermined value, exports a triggering signal;
A tripper connects the trigger end of the failure detection device of described piezo-resistance, under the excitation of described triggering signal, disconnects described disconnect;
A pressure responsive resistor failure display unit comprises indicator light switch and indicator light by described tripper control.
10, ground-fault interrupter according to claim 9, wherein, the failure detection device of described piezo-resistance also comprises a comparator, and piezo-resistance leakage current value and threshold value that is detected compared.
11, ground-fault interrupter according to claim 9, wherein, described detector is a magnetic test coil.
12, ground-fault interrupter according to claim 9, wherein, described detector is the resistance of connecting with piezo-resistance.
13, ground-fault interrupter according to claim 9, wherein, described tripper is controllable silicon and the broken coil that is connected in series.
14, ground-fault interrupter according to claim 1, wherein, described pressure responsive resistor failure protective device comprises:
A piezo-resistance (MOV1), an end connects the input of a power line, and the other end is connected the power line that another passes ground detection device by described moving contact with the contact of fixed contact;
Ground detection device (N1) detects by unsymmetrical current, detection of ground faults electric current and piezo-resistance leakage current, and output fault detection signal;
Fault trigger module (IC) receives the fault detection signal that ground detection device (N1) is exported, when described fault detection signal during greater than threshold value, and the output triggering signal;
The ground fault open circuit final controlling element, comprise broken coil (J2) and controllable silicon (VD7), the triggering signal conducting that controllable silicon (VD7) is exported by the fault trigger module makes broken coil (J2) energising produce disjunction magnetic field, and the moving contact of circuit breaker and the fixed contact of energising are disconnected;
A pressure responsive resistor failure display unit comprises switch (K4) and indicator light by described broken coil control.
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| CNB2005100072369A CN100370570C (en) | 2005-02-05 | 2005-02-05 | Intellight earth-fault circuit breaker with reverse connection protection |
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| CNB2005100072369A CN100370570C (en) | 2005-02-05 | 2005-02-05 | Intellight earth-fault circuit breaker with reverse connection protection |
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| CN100370570C CN100370570C (en) | 2008-02-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110491746A (en) * | 2019-08-13 | 2019-11-22 | 合肥通用电源设备有限公司 | A kind of circuit switch with reset function |
| CN111492540A (en) * | 2017-12-07 | 2020-08-04 | 豪倍公司 | Shallow electrical protection device (GFCI, AFCI, and AFCI/GFCI) systems and methods |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101672891B (en) * | 2009-09-24 | 2012-05-02 | 常熟理工学院 | Main-contact electrical-contact state on-line detector for low-voltage circuit breaker |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5448443A (en) * | 1992-07-29 | 1995-09-05 | Suvon Associates | Power conditioning device and method |
| CN2193601Y (en) * | 1994-05-20 | 1995-03-29 | 上海立新电器厂 | Current leakage protecting socket |
| JP3505558B2 (en) * | 1996-02-16 | 2004-03-08 | 富士電機機器制御株式会社 | Earth leakage breaker |
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2005
- 2005-02-05 CN CNB2005100072369A patent/CN100370570C/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111492540A (en) * | 2017-12-07 | 2020-08-04 | 豪倍公司 | Shallow electrical protection device (GFCI, AFCI, and AFCI/GFCI) systems and methods |
| US11309667B2 (en) | 2017-12-07 | 2022-04-19 | Hubbell Incorporated | Shallow electrical protection device (GFCI, AFCI, and AFCI/GFCI) system and method |
| CN111492540B (en) * | 2017-12-07 | 2022-08-02 | 豪倍公司 | Shallow electrical protection device (GFCI, AFCI, and AFCI/GFCI) systems and methods |
| US11557862B2 (en) | 2017-12-07 | 2023-01-17 | Hubbell Incorporated | Shallow electrical protection device (GFCI, AFCI, and AFCI/GFCI) system and method |
| US11862906B2 (en) | 2017-12-07 | 2024-01-02 | Hubbell Incorporated | Shallow electrical protection device (GFCI, AFCI, and AFCI/GFCI) system and method |
| CN110491746A (en) * | 2019-08-13 | 2019-11-22 | 合肥通用电源设备有限公司 | A kind of circuit switch with reset function |
| CN110491746B (en) * | 2019-08-13 | 2021-07-13 | 合肥通用电源设备有限公司 | Circuit switch with reset function |
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| CN100370570C (en) | 2008-02-20 |
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