CN201303246Y

CN201303246Y - Automatic switch-on device of conventional circuit breaker

Info

Publication number: CN201303246Y
Application number: CNU2008201550032U
Authority: CN
Inventors: 谢俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-11-04
Filing date: 2008-11-04
Publication date: 2009-09-02
Anticipated expiration: 2018-11-04

Abstract

The utility model discloses an automatic switch-on device of a conventional circuit breaker. The structure of the device comprises two parts, namely a time relay KT part and an intermediate relay KM part, and the key points lie in that the time relay KT part is firstly connected in series with a switch SA, and then with a fuse FU which is connected to a power source; and the intermediate relay KM part is connected in series with a contact KT1, and then is connected with the back surface of the switch SA. The device achieves automatic power supply restoration after voltage losing and tripping; and the device is provided with a function of not starting a closing circuit after an over current protection action, and at the same time, the device solves an automatic switch-on phenomenon and repeated switching-closing cycling faults.

Description

A kind of automatic closing device of omnipotent breaker

Technical field

The utility model relates to a kind of omnipotent breaker, relates in particular to a kind of automatic closing device of omnipotent breaker.

Background technology

China's paper periodical, journal title is called " electrotechnics ", the phase number of the edition is 50-1072, publication date is in 2003 03 month the periodical, wherein the 40th page, by Xu Lin being entitled as of delivering " the automatic closing conception of DW15 series omnipotent breaker " literary composition, set forth a kind of automatic closing device of omnipotent breaker, referring to accompanying drawing 2,3,4, this device is made up of two parts, time relay KT part and auxiliary relay KM part, time relay KT and auxiliary relay KM part are all connected with power supply by fuse.This device has been realized after the decompression tripping operation can automatic recovery of power supply, and does not start the function in loop when overcurrent protection is moved.But this device following two problems can occur in the practical application again:

(1) rigidly connects energize, when comprising maintenance back energized, the automatic closing phenomenon can occur.Referring to Fig. 2, Fig. 3 rigidly connects energize, simultaneously start-up time relay K T and auxiliary relay KM, before the normally closed electric shock KT1 that time-delay disconnects did not move, the electric shock of often opening of KM had made the action of K1 coil electricity, K1 electric shock closure makes breaker closing, i.e. the automatic closing phenomenon.Because this combined floodgate is not that operating personnel handle, and probably causes the accident, should avoid this situation to take place in practice.

(2) circulatory troubles of divide-shut brake may appear repeatedly.Referring to Fig. 3, Fig. 4 owing to capacitor C, time relay KT are in "on" position for a long time, punctures or KT coil short circuit fault if capacitor C occurs, all might make fuse FU2 fusing, thereby, KT is discharged.If circuit generation this moment overcurrent, circuit breaker is answered separating brake, because KT discharges, the normally closed recovery of KT gets KM, make breaker closing again, thereby because of overcurrent separating brake again, KM makes breaker closing again, divide-shut brake circulatory troubles repeatedly appears, the time that this has not only prolonged the excision overcurrent also may cause the melting welding of contact of breaker or burns, even power supply trouble occurs.

In sum, the automatic closing device of this omnipotent breaker is still waiting to improve.

The utility model content

The utility model is at deficiency of the prior art; a kind of automatic closing device of improved omnipotent breaker is provided; this device had both been realized the automatic recovery of power supply after the decompression tripping operation; and after overcurrent protection action, do not start closing circuit, solved automatic closing phenomenon and divide-shut brake circulatory troubles repeatedly again.

In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals:

A kind of automatic closing device of omnipotent breaker, structure comprises two parts, time relay KT part and auxiliary relay KM part, its main points are, described time relay KT part is switch S A of polyphone earlier, at series connection fuse FU, described fuse FU is connected to power supply, and described auxiliary relay KM partly with after connecting in the KT1 contact receives switch S A back.

Beneficial effect: the utility model compared with prior art; has following beneficial effect: the automatic recovery of power supply after having realized the decompression tripping operation; and when after overcurrent protection action, not starting the function of closing circuit, also solved automatic closing phenomenon and divide-shut brake circulatory troubles repeatedly.

Figure of description

Fig. 1 is the utility model circuit theory diagrams.

Fig. 2 is the circuit theory diagrams of auxiliary relay KM part in the prior art.

Fig. 3 is the connected mode schematic diagram of auxiliary relay KM part and power supply in the prior art.

Fig. 4 is the connected mode schematic diagram of time relay KT part and power supply in the prior art.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

Referring to accompanying drawing, a kind of automatic closing device of omnipotent breaker, structure comprises two parts, time relay KT part and auxiliary relay KM part, its main points are that described time relay KT part is switch S A of polyphone earlier, at series connection fuse FU, described fuse FU is connected to power supply, and described auxiliary relay KM partly with after connecting in the KT1 contact receives switch S A back.

As preferably, described switch S A is a toggle switch.Both handled easily was simplified technology again, convenient production.

Operation principle, in the prior art, time relay KT and auxiliary relay KM part are all directly connected with power supply by fuse.Referring to Fig. 2, Fig. 3, Fig. 4, when rigidly connecting energize, simultaneously start-up time relay K T and auxiliary relay KM, before the normally closed electric shock KT1 of time-delay disconnection does not move again, the electric shock of often opening of KM has made the action of K1 coil electricity, and K1 electric shock closure makes breaker closing, energized, when comprising maintenance back energized, the automatic closing phenomenon can appear.Because this combined floodgate is not that operating personnel handle, and probably causes the accident.In the present embodiment, owing to increased a knob in switch S A, circuit breaker is when rigidly connecting energize, KM and KT be not energising all, so, the automatic closing phenomenon can not appear, solve energising automatic closing phenomenon of the prior art effectively, avoided the potential safety hazard that may exist.

In the prior art, because time relay KT contacts with power supply by fuse FU2, a FU3 respectively mutually with auxiliary relay KM, referring to Fig. 3, Fig. 4, so, owing to capacitor C, time relay KT are in "on" position for a long time, if capacitor C occurring punctures or KT coil short circuit fault, all might make fuse FU2 fusing, thereby, KT is discharged.If circuit generation this moment overcurrent, circuit breaker is answered separating brake, because KT discharges, the normally closed recovery of KT gets KM, make breaker closing again, thereby because of overcurrent separating brake again, KM makes breaker closing again, divide-shut brake circulatory troubles repeatedly appears, the time that this has not only prolonged the excision overcurrent also may cause the melting welding of contact of breaker or burns, even power supply trouble occurs.In the present embodiment, time relay KT links to each other with power supply by same fuse FU with auxiliary relay KM, as shown in Figure 1, puncture or KT coil short circuit fault when capacitor C occurring, after fuse FU was fused, KT and KM were released simultaneously, and KM often opens, also just solve the circulatory troubles of above-mentioned divide-shut brake repeatedly, ensured security of products.

More than be the description of the utility model preferred embodiment, yet the utility model is not limited to embodiment as described herein, under the situation that does not break away from the utility model scope, also comprises various changes and the variation done.

Claims

1, a kind of automatic closing device of omnipotent breaker, structure comprises two parts, time relay KT part and auxiliary relay KM part, its main points are, described time relay KT part is switch S A of polyphone earlier, at series connection fuse FU, described fuse FU is connected to power supply, and described auxiliary relay KM partly with after connecting in the KT1 contact receives switch S A back.

2, the automatic closing device of omnipotent breaker according to claim 1 is characterized in that, described switch S A is a toggle switch.