CN2619359Y

CN2619359Y - Earthing fault breaker with error connection protection

Info

Publication number: CN2619359Y
Application number: CN 03230879
Authority: CN
Inventors: 高少华
Original assignee: WENZHOU SANMENG SCI-TECH ELECTRICAL Co Ltd
Current assignee: WENZHOU SANMENG SCI-TECH ELECTRICAL Co Ltd
Priority date: 2003-05-06
Filing date: 2003-05-06
Publication date: 2004-06-02
Anticipated expiration: 2013-05-06

Abstract

Provided is a grounding fault circuit breaker with a fault connection protection which is suitable for various apparatus instruments, devices, equipment, systems etc. used by electric power. The utility model is characterized in that the loading end is connected with a reverse fault connection mechanism. The reduction button is provided with a reverse tripping mechanism. When the power is connected with the loading end by mistake, the reduction button will stay in the tripping state forever regardless of operation to make the reduction button to reduct until the fault connection is corrected. Compared with prior techniques, the circuit breaker of the utility model with a simple mechanical tripping structure effectively prevents reverse fault connection from damaging the apparatus and hurting human security. The utility model can bear the surge test of 6KV/3KA and can stand efficiently moisture, corrosion and rust.

Description

The ground-fault interrupter of tape error wiring protection

Technical field

The utility model relates to a kind of ground-fault interrupter, relates in particular to a kind of ground-fault interrupter of tape error wiring protection.Be applicable to various electrical equipment, instrument, device, equipment and systems etc. with power supply.

Background technology

Most of electrical wiring devices all have the terminals that can insert power supply, and can insert the load end of one or more loads.The place that between input and load two ends, has a sensor circuit path at least.The connection of power supply wiring or electrical conduction current is to be connected with load end at input.Electrical wiring device industry constantly increases circuit breaking apparatus or system so that can cut off different loads end electric current, and as household electrical appliance, consumer electric product and branch circuit, the electric circuit of ground-fault interrupter particularly will be installed in Household bathroom and kitchen.

Formerly in the technology, United States Patent (USP) 4.595, a kind of " ground fault circuit interrupt system " (Ground Fault Circuit Interrupting System---GFCIS) described in 894, it is electrically connected with exciting the dropout mechanical device mechanically to cut off at input and load end, as the reducible device in back of threading off, to survey earth fault.Yet under many exceptional conditions, the surge when device and device are threaded off makes the mechanism that cuts off circuit lose the dropout ability.This occurs in mostly and still supresses reset button this moment, and the result causes that inoperative trip gear does not have earth fault protection ground to reset.So that cause and damage electrical equipment and jeopardize personal safety.

Traditional ground fault circuit interrupter (Ground Fault Circuit Interrupters-be designated hereinafter simply as GFCI) is except that the load of wiring connects, also can connect one or more tie points near load, it is to use assembling screw that wiring is connected with load end, and load is connected on the inner socket by plug.It should be noted that those connect the device of external cabling, incoming line is connected to input terminal, and load line is received load end and connected.Yet other situations often take place, and GFCI is connected on the external cable mistakenly, so that load line is received input terminal, power cable is received load end, Here it is well-known reverse wiring, and its circuit breaking apparatus is exactly a reverse wiring as a result.No matter be under dropout or normal condition, the unprotect power supply is supplied with socket always, and the error protection that connects to load just has been excluded, and has both made to have kept the error protection that load end connects.Also can not get having protected.This has just shown that those devices have been connect instead (backward error wiring) by wiring.Formerly in the technology, many GFCI adopt forms such as alarm tag, backward error wiring indicator light, backward error wiring warning to remind the wiring and the load end of the correct jockey of user, but the light caution is not enough, still has the wiring of many handle assemblies to be connect instead, has caused breaking-up.

Summary of the invention

The utility model provides a kind of ground-fault interrupter of tape error wiring protection in order to overcome the deficiency of the circuit breaker in the above-mentioned technology formerly, to be used for the simplest mechanical releasing structure on the reset button, solves the protection question of backward error wiring.Guarantee safety, avoid loss.

Circuit breaker of the present utility model, mainly comprise: the shell that constitutes by base 003, center 002 and loam cake 001, reset button 006 and the testing button 007 put on the loam cake 001, grounded bracket 004, two inputs and two load ends, two socket fixed contact electric-conductor 005-1,005-2 or indicator lamp holder 040 is arranged and pilot bulb 041.Said two inputs are connected with 016,017, two load end of input moving contact respectively and are connected with load end moving contact 018,019 respectively.Load end is connected with the backward error wiring mechanism.Reset button 006 has reverse tripping mechanism.

The said backward error wiring mechanism that is connected load end mainly comprises: two load end wiring part 15-1,15-2, two reverse conductor wires 039 and two reverse dropout load end power spring 034-1,034-2.Said two load end wiring part 15-1,15-2 link to each other with reverse dropout load end power spring 034-1,034-2 by reverse conductor wire 039 respectively.

Said reset button 006 with reverse tripping mechanism, mainly contain: two reverse dropout moving contact 033-1,033-2, two reverse dropout fixed contact 032-1,032-2, trip gear 020 resets, tripping coil frame 021, be seated in inside on the tripping coil frame 021 successively and contain the tripping coil 036 of dropout iron core 024, dropout iron core return-spring 026, tripping coil pole piece 031 and the inner dropout lock pin 025 that resets that has the lock pin spring 027 that resets.Said two reverse dropout fixed contact 032-1,032-2 are seated in the both sides of tripping coil frame 021 respectively.Said two reverse dropout moving contact 033-1,033-2 pass respectively be seated in behind the trip gear 020 that resets reverse dropout load end power spring 034-1,034-2 above.

As the circuit breaker of above-mentioned structure, when power supply when input inserts by two terminal screw 010-1 of input, press reset button 006 and drive the trip gear 020 that resets, circuit breaker is in reset mode.Input moving contact 016,017 and socket fixed contact electric-conductor 005-1,005-2 contact, thereby the socket energising of circuit breaker is used.Circuit breaker in use produces earth fault, or overload, or short circuit surpasses 5 MAHs, rush of current ripple induction as lightening excites tripping coil 036, makes trip gear 020 action that resets, reset button 006 is promptly threaded off, input moving contact 016,017 and socket fixed contact electric-conductor 005-1,005-2 disconnect, and make the socket no power of circuit breaker, make circuit interruption.Therefore, instrument and equipment and personal safety have been protected.If when continuing to use, must fix a breakdown earlier.

When the backward error wiring, load end wiring part 15-1, the 15-2 input of power supply from the backward error wiring mechanism is by reverse conductor wire 039 turn-on reversal dropout load end power spring 034-1,034-2.Oppositely dropout load end power spring 034-1,034-2 are with oppositely dropout moving contact 033-1,033-2 contact, reset button 006 is in the dropout inactive state, but oppositely thread off moving contact 033-1,033-2 and reverse dropout fixed contact 032-1,032-2 disconnection maintenance setpoint distance.Stop the electric current of the power supply circuit-breaker of flowing through, avoided the backward error wiring to use, guaranteed safety.As Fig. 6, shown in Figure 9.

When mistakenly that power supply is fashionable from the load termination of circuit breaker, the receptacle face of circuit breaker is non-transformer all the time.Because load end is divided into two bodies and disconnects for socket fixed contact electric-conductor 005-1,005-2.Press reset button 006, opened the dropout lock pin 025 that resets, the iron core 006-1 that resets in the reset button 006 uses the return force of dropout iron core return-spring 026, the dropout lock pin 025 that just is reset pins, back-moving spring 023 beginning rebound rises, the drive trip gear 020 that resets, trip gear 020 drives reverse dropout moving contact 033-1 by resetting, 033-2, reverse dropout load end power spring 034-1,034-2 is at reverse dropout moving contact 033-1, the lower end of 033-2 begins resilience, raise simultaneously, reset button 006 rises to desired location, do not arrive reset position, make reverse dropout moving contact 033-1,033-2 and reverse dropout fixed contact 032-1, the 033-2 contact, excite the tripping coil 036 lightening induction action of opening circuit, make dropout iron core 024 under the effect of magnetic force, begin the compression dropout spring 026 that resets, the propelling dropout lock pin 025 that resets is opened the snap close door.Thereby, make reset button 006 dropout of after the resilience of back-moving spring 026, tripping, stoped reset button 006 to reset, protected the energising of backward error wiring and used, guaranteed safety.As shown in Figure 9.

As mentioned above, when mistakenly that power supply is fashionable from the load termination of circuit breaker, originally be in trip status reset button 006 operation its when resetting, its can be threaded off immediately again, cuts off the socket power of circuit breaker.Even continued operation reset button again 006 can not make its reset button 006 reset.Avoid the person that caused because of the backward error wiring and the breaking-up problem of electrical equipment, prolonged the useful life of circuit breaker.But, when power supply when input inserts, electric current is exported from load end by socket fixed contact electric-conductor 005-1,005-2, the user can connect near load comprise one or more tie points, and circuit breaker is normally used.This moment, the backward error wiring mechanism was in off-state for a long time, and influence resets and false tripping anything but.

The beneficial effect of the utility model circuit breaker: when circuit breaker of the present utility model is connected to load end mistakenly at power supply, its said backward error wiring mechanism and oppositely the protection backward error wiring mechanism that constitutes of tripping mechanism can guarantee the circuit breaker face receptacle all the time non-transformer pass through, reset button is in trip status for a long time.Even reset button is pressed more than 100 times continuously, can not reset, after the wiring of correcting a mistake, just can reset.And when the circuit-breaker operate as normal, its protection backward error wiring mechanism is in off-state all the time, never influences the operate as normal of device, has really guaranteed the safety of the electrical equipment and the person.Can stand the surge test of 6KV/3KA, moisture resistance anticorrosion resistant to rust ability is strong.Cost is low, suitable batch production.

Description of drawings

Fig. 1 is an external structure schematic diagram of the present utility model, wherein:

Fig. 1-the 1st, input current are the circuit breaker external structure schematic diagram of 15 ampere-hours.

Fig. 1-2 is that input current is the circuit breaker external structure schematic diagram of 20 ampere-hours.

Fig. 2 is the internal structure schematic diagram after Fig. 1-2 removes loam cake 001.

Fig. 3 is the internal structure schematic diagram after Fig. 2 removes center 002.

Fig. 4 is the cross-sectional schematic diagram after Fig. 3 removes base 003.

Fig. 5 is the upward view that removes among Fig. 3 behind the base 003.

Fig. 6 is the dissection schematic diagram that shows trip status.

Fig. 7 oppositely conducts electricity the on-state schematic diagram.

Fig. 8 is a backward error wiring mechanism conduction off-state schematic diagram.

Fig. 9 is the circuit breaker input wiring on-state schematic diagram that resets.

Figure 10 is reverse tripping mechanism and backward error wiring mechanism schematic diagram.

Figure 11 is the upward view that removes among Figure 10 behind the wiring board 035.

Figure 12 is that Fig. 3 removes base 003, wiring board 035, two inputs and the assembly of load end and the upward views after magnet ring cover 029 and the magnet ring lid 030.

Figure 13 is the STRUCTURE DECOMPOSITION schematic diagram of circuit breaker of the present utility model.

Embodiment

Below in conjunction with accompanying drawing, further specify the structure of the utility model circuit breaker.

Circuit breaker of the present utility model can be used for two kinds of power: a kind of 15A of being (ampere), as Figure 1-1.Another kind is 20A (ampere), shown in Fig. 1-2.

The shell of shown circuit breaker of the present utility model is by four assembling screws 008 on four jiaos among Fig. 1, and loam cake 001, center 002, base 003, grounded bracket 004 are tightened together.Be equipped with reset button 006, testing button 007 in the loam cake 001; Indicator lamp holder 040 and pilot bulb 041 are equipped with between base 003 and the center 002 on the grounded bracket 004 between input terminal screw 010-1 and load end wiring screw 010-2, loam cake 001 and the center 002 and are equipped with ground connection screw 009.Have on the loam cake 001: two 15A socket fixed contact electric-conductor socket 005-1-1,005-1-2, two 20A socket fixed contact electric-conductor socket 005-2-1,005-2-2 and two earth jack 038-1,038-2.

Fig. 2 is the internal structure schematic diagram after Fig. 1-2 removes loam cake 001, demonstrates four assembling screws 008 on the angle.Demonstrate socket fixed contact electric-conductor 005-1 that is used for 20A and the socket fixed contact electric-conductor 005-2 that is used for 15A.The two ends that demonstrate grounded bracket 004 are equipped with ground connection annex 038 and ground connection screw 009 respectively.Test experiments sheet 011 under two silver contacts 037 and the testing button 007 is arranged respectively on two socket fixed contact electric-conductor 005-1, the 005-2.

Fig. 3 is the internal structure schematic diagram after Fig. 2 removes center 002.In base 003, be equipped with wiring board 035 at the end, on wiring board 035, be equipped with the magnet ring cover 029 and the magnet ring lid 030 that include magnet ring.Two inputs contain terminal screw 010-1 respectively, and input wiring part 012,013, input wiring compressing tablet 014-1 and an end insert two the input moving contacts 016,017 in the magnet ring lid 030; Two load ends contain terminal screw 010-2 respectively, load end wiring part 015-1,015-2, load end keeper 028-1,028-2 and two load end moving contact 018-1,018-2.On the top of two load end moving contact 018-1,018-2 silver contact 037 is arranged respectively; Between two load end moving contact 018-1 and 018-2, be equipped with tripping coil frame 021, on tripping coil frame 021, be equipped with the tripping coil 036 that includes dropout iron core 024.Tripping coil 036 and reset tripping coil pole piece 031 is arranged between the dropout lock pin 025.

Fig. 4 is that Fig. 3 removes the cross-sectional schematic diagram in base 003 back.Demonstrate the internal structure of the trip gear that resets.The top that reset button 006 lower end has the lock pin iron core 006-1 of cone centre is with back-moving spring 023, and the bottom is with dropout secondary spring 022; There is the dropout of resetting lock pin 025 at the cone centre place.Two reverse dropout load end power spring 034-1,034-2 are seated in the both sides of tripping coil frame 021.Two reverse dropout load end power spring 034-1,034-2 one end is fixed on the wiring board 035, is respectively oppositely thread off moving contact 033-1,033-2 above the other end.

Fig. 5 is the upward view that removes among Fig. 3 behind the base 003, demonstrates each reverse conducting element is put on wiring board 035 back side position and line situation.Two reverse dropout load end power spring 034-1,034-2 are connected with two reverse conductor wires 039 respectively.Two reverse dropout fixed contact 032-1,032-2 link to each other with tripping coil 036 respectively.

Fig. 6 is the internal anatomy that shows trip status.Reset button 006 is in trip status.At this moment, moving contact 033-1 one end of oppositely threading off is to be reversed dropout load end power spring 034-1 to attract, both contacts.And the other end and oppositely dropout fixed contact 032-1 disconnection.

Fig. 7 is an oppositely conduction on-state schematic diagram of protection.When reset button 006 was pressed, be reset dropout lock pin 025 of the snap close iron core 006-1 of reset button 006 pinned.Under the resilience force effect of back-moving spring 023, drive the trip gear 020 that resets and rise, reverse dropout moving contact 033-1 is contacted with reverse dropout fixed contact 032-1 with reverse dropout load end power spring 034-1.Protection backward error wiring mechanism is in on-state.Input moving contact 016 and load end moving contact 018 are not connected with socket fixed contact electric-conductor 005-2, and socket does not have energising.

Fig. 8, (see figure 7) when protection backward error wiring mechanism is in on-state, tripping coil 036 is opened circuit by power connection and excites the lightening action that begins, dropout iron core 024 is under the effect of magnetic force, begin to compress dropout iron core return-spring 026, back down the dropout lock pin 025 that resets, make reset button 006 and dropout lock pin 025 disengaging that resets, dropout secondary spring 022 resilience immediately.Under the effect of resilience force, make the trip gear 020 that resets reset to original position, drive reverse dropout moving contact 033-1,033-2 and move down, disconnect with reverse dropout fixed contact 032-1,032-2, protection backward error wiring mechanism is in off-state.

Fig. 9, the circuit breaker input wiring on-state schematic diagram that resets.When power supply when input inserts, press reset button 006, open the dropout lock pin 025 that resets, be reset dropout lock pin 025 of the lock pin iron core 006-1 of reset button 006 pins, back-moving spring 023 beginning resilience is up pushed up, and drives the trip gear 020 that resets and up moves, and input moving contact 016,017 and load end moving contact 018,019 trip gear 020 that and then resets moves synchronously simultaneously, contact with socket fixed contact electric-conductor 005-1,005-2, make the load end power connection of circuit breaker.Protect the backward error wiring mechanism and be in off-state this moment, influences the normal running of circuit breaker anything but.

Figure 10 is reverse tripping mechanism and backward error wiring mechanism schematic diagram.Further provide the locations of structures of each element in above-mentioned reverse tripping mechanism and the backward error wiring mechanism.In the backward error wiring mechanism, load end moving contact 018,019 resets and links to each other by the reverse dropout load end power spring 034-2 or the 034-1 of reverse conductor wire 039 below placing reverse dropout moving contact 033-2 or 033-1.Oppositely in the tripping mechanism, an end of dropout iron core return-spring 026 is enclosed within the head of dropout iron core 024, and the other end withstands on the tripping coil pole piece 031.

Figure 11 is the upward view of Figure 10, but has removed wiring board 035 and two input moving contacts and load end moving contact, mainly provides the locations of structures of each trigger element in the reverse tripping mechanism.Be equipped with the dropout lock pin 025 that resets that the lock pin spring 027 that resets is contained in inside at trip gear 020 center facing on the position of reset button 006.Resetting between lock pin spring 027 and the dropout iron core return-spring 026 is tripping coil pole piece 031.Two reverse dropout moving contact 033-1,033-2 pass respectively trip gear 020 be seated in reverse dropout load end power spring 034-1,034-2 above.

Figure 12 is that Fig. 3 has removed base 003, wiring board 035, two inputs and the assembly of two load ends and the upward views after magnet ring cover 029 and the magnet ring lid 030, clearly show the input moving contact 016,017 of protection backward error wiring mechanism, the shape and the relative position of socket fixed contact electric-conductor 005-1 and oppositely thread off fixed contact 032-1,032-2 and the trip gear 020 that resets.The tripping coil 036 of dropout iron core 024, dropout iron core return-spring 026, the lock pin spring 027 that resets is seated on the tripping coil frame 021 successively.

In the exploded view of Figure 13, provide the structure and the shape of whole elements of circuit breaker of the present utility model.

Claims

1; a kind of ground-fault interrupter of tape error wiring protection; mainly comprise: by base (003); the shell that center (002) and loam cake (001) constitute; reset button (006) that is equipped with on the loam cake (001) and testing button (007); grounded bracket (004); two inputs and two load ends; two socket fixed contact electric-conductor (005-1; 005-2); two input moving contacts (016 that input has respectively; 017); it is characterized in that: two load ends have load end moving contact (018 respectively; 019) and the backward error wiring mechanism, reset button (006) has reverse tripping mechanism.

2, the ground-fault interrupter of tape error wiring protection according to claim 1, it is characterized in that: the said backward error wiring mechanism that links to each other with load end, mainly comprise: two load end wiring parts (015-1,015-2), two reverse conductor wires (039) and two reverse dropout load end power springs (034-1,034-2); Said two load end wiring parts (015-1,015-2) link to each other with reverse dropout load end power spring (034-1,034-2) by reverse conductor wire (039) respectively.

3, earth fault backward error wiring circuit-breaker according to claim 1 and 2, it is characterized in that: said reset button (006) with reverse tripping mechanism, mainly contain: two reverse tripping coils connect fixed contact (032-1,032-2), two reverse dropout moving contact (033-1,033-2), trip gear (020) resets, tripping coil frame (021), be seated in the tripping coil that includes dropout iron core (024) (036) on the tripping coil frame (021) successively, dropout spring (026) resets, the reset dropout lock pin (025) that resets of lock pin spring (027) of tripping coil pole piece (031), interior band; Said two reverse tripping coils connect the both sides that fixed contacts (032-1,032-2) are seated in tripping coil frame (021) respectively, two reverse dropout moving contacts (033-1,033-2) pass respectively be seated in behind the trip gear that resets (020) reverse dropout load end power spring (034-1,034-2) above.