CN2938387Y

CN2938387Y - Leakage circuit breaker

Info

Publication number: CN2938387Y
Application number: CN 200620075810
Authority: CN
Inventors: 蒋后仲; 张明超
Original assignee: Zhejiang Tengen Electric Co Ltd
Current assignee: Zhejiang Tengen Electric Co Ltd
Priority date: 2006-08-29
Filing date: 2006-08-29
Publication date: 2007-08-22
Anticipated expiration: 2016-08-29

Abstract

The utility model relates to a residual current circuit breaker which is an integrated phase conductor electrode and neutral electrode structure. The residual current circuit breaker comprises a base, a zero sequence current transformer arranged on the base, an electronic circuit board, a contact piece, an electric slice, and a handle; a neutral electrode dynamic contact is articulated with a neutral lever, the lever is articulated with a jump buckle of the phase conductor linkage mechanism; the lever and the neutral electrode dynamic contact are connected with the jump buckle linkage, a pull-up staff is articulated on the lever, the axis of the shackle of the phase conductor electrode linkage mechanism is below the pull-up staff; a movable iron core of a leakage trip coil is at the junction of the pull-up staff, the movable iron core is connected by the transmission with the pull-up staff, the pull-up staff is connected with the axis of the shackle of the linkage mechanism by an axis transmission. The beneficial effect of this structure is that the breaker has a simple structure, low cost and reliable performance.

Description

Residual current circuit breaker

Technical field

The utility model relates to the residual current action breaker of a kind of family expenses or similar applications, but relates in particular to the residual current circuit breaker that a kind of suitable short circuit breaking current is had relatively high expectations, the integrated phase line utmost point of the structure of neutral pole disjunction adds neutral pole.

Background technology

At present, small-sized residual current circuit breaker commonly used structure commonly used has two kinds, and a kind of is that independent leakage tripping device unit and independent miniature circuit breaker carry out splicing structure, this structure is corpulent and complicated, breaking speed is slow, and breaking capacity is low, manufacturing cost height and performance is unreliable.Another kind of structure is the prior art comparatively approaching with the utility model, and the promptly incorporate phase line utmost point adds the neutral pole structure, and by mechanism's drive neutral pole action of the phase line utmost point, neutral pole has independent snap close, tripping mechanism and electric leakage tripping coil.When reaching the residual operating current value, the action of electric leakage tripping coil iron core, driving the neutral pole mechanism action again threads off, and then drive the release of phase line utmost point linkage, thus the residual current circuit breaker turn-off current, this structure is comparatively complicated, requiring accurate mould manufacturing and high performance material is backing, reliability is lower, and is very unreliable as the neutral pole mechanism of secondary dropout especially, and production technology is comparatively complicated.In addition, for the electronic type residual current circuit breaker of above two kinds of structures, the accessory power supply of its electronic circuit board all is directly to draw from major loop, so can only go up inlet wire basically, can not descend inlet wire, otherwise circuit breaker has the damage possibility.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of residual current circuit breaker of simple in structure, good reliability.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: residual current circuit breaker, the integrated phase line utmost point adds the neutral pole structure, comprise pedestal and be arranged on zero sequence current mutual inductor on the pedestal, electronic circuit board, contact chip, conducting strip, handle, neutral pole moving contact and neutral pole lever are hinged, the tripping of the linkage of the lever and the phase line utmost point is hinged, lever and neutral pole moving contact and tripping are connected, on lever, be hinged with dead man, axle on the snap close of the linkage of the phase line utmost point is positioned at the below of dead man, the moving iron core of electric leakage tripping coil is stuck in the prong place of dead man, moving iron core and dead man are in transmission connection, and the through-drive on the snap close of dead man and linkage is connected.

As further improvement, the accessory power supply phase line utmost point of described electronic circuit board is introduced by the electric leakage tripping coil, and the other end of electric leakage tripping coil is guided on the contact chip, with lead phase line utmost point power supply is guided on the conducting strip that is contained on the pedestal, contact chip and tiller interlock, when contact chip contacted with conducting strip, electronic circuit board obtained working power.

The beneficial effects of the utility model are: owing to saved some parts such as neutral pole snap close, tripping and spring, thereby have simple in structure, be swift in motion, the advantage of breaking capacity height, low cost of manufacture, dependable performance.In addition, the utility model is inlet wire in any way, thereby has solved the problem that residual current circuit breaker can only go up inlet wire, has also avoided because the serious consequence that mis-wired causes.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the right view of Fig. 1.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described below:

Shown in Fig. 1～2, residual current circuit breaker comprises wire frame 1, screw 2, binding post 3, pedestal 4, zero sequence current mutual inductor 5, fixed contact 6, electric leakage tripping coil 7, conducting strip 8, contact chip 9, test connects button 10, moving iron core 11, handle 12, dead man 13, neutral pole lever 14, rivet 15, spring 16, neutral pole moving contact 17, bearing pin 18, backing plate 19, electronic circuit board 20, clip 21, lower cover 22, loam cake 23, the axle 24 on the snap close.

The integrated phase line utmost point of this residual current circuit breaker adds neutral pole (but neutral pole disjunction) structure, profile is less, width only is that two moduluses are 36mm, neutral pole moving contact 17 is hinged with neutral pole lever 14, the tripping of neutral pole lever 14 and the linkage of the phase line utmost point that is contained in this residual current circuit breaker is (at the rear side of pedestal 4, not shown) hinged, the tripping of linkage drives neutral pole lever 14 and 17 motions of neutral pole moving contact during the actuating circuit breaker.Neutral pole need not be independent mechanism, only a dead man 13 is contained on the neutral pole lever 14, axle 24 on the snap close (not shown) of breaker link mechanism is positioned at the below of dead man 13, the moving iron core of electric leakage tripping coil 7 is stuck in the prong place of dead man 13, when reaching residual operating current, moving iron core 11 overcomes the effect of iron core spring force and moves right 13 rotations of drive dead man, and dead man 13 is stirred the axle 24 on the linkage snap close, thereby makes linkage release disjunction residual current circuit breaker.This is simple in structure, is swift in motion, and the breaking capacity height owing to saved some parts such as neutral pole snap close, tripping and spring, not only reduced by 1/3 manufacturing cost, and performance is very reliable.In Fig. 1, the accessory power supply phase line utmost point of electronic circuit board 20 is introduced by electric leakage tripping coil 7, and the other end of electric leakage tripping coil 7 is guided on the contact chip 9, phase line utmost point power supply is guided on the conducting strip 8 that is contained on the pedestal 4 with lead, the accessory power supply zero line of electronic circuit board 20 is directly introduced from the ultra-Left terminated line terminal 3 of neutrality, the phase line utmost point and neutral pole major loop pass the iron core of zero sequence current mutual inductor 5 simultaneously, will illustrate parts again and pack in the pedestal 4 by shown position.In Fig. 2, all parts of the phase line utmost point and neutral pole remainder are packed in the pedestal 4, cover lower cover 22 and loam cake 23 respectively, with rivet loam cake 23, lower cover 22 and pedestal 4 rivetings are got final product together again.

When circuit breaker is in open position, conducting strip 8 is contactless with contact chip 9, electric leakage tripping coil 7 and electronic circuit board 20 are not charged, when breaker closing, owing to tiller (not shown) motion promotes contact chip 9 motions, cause contact chip 9 to contact and make electronic circuit board 20 acquisition working powers with conducting strip 8.

Claims

1, residual current circuit breaker, the integrated phase line utmost point adds the neutral pole structure, comprise pedestal and be arranged on zero sequence current mutual inductor on the pedestal, electronic circuit board, contact chip, conducting strip, handle, it is characterized in that: neutral pole moving contact and neutral pole lever are hinged, the tripping of the linkage of the lever and the phase line utmost point is hinged, lever and neutral pole moving contact and tripping are connected, on lever, be hinged with dead man, axle on the snap close of the linkage of the phase line utmost point is positioned at the below of dead man, the moving iron core of electric leakage tripping coil is stuck in the prong place of dead man, moving iron core and dead man are in transmission connection, and the through-drive on the snap close of dead man and linkage is connected.

2, a kind of residual current circuit breaker according to claim 1, it is characterized in that: the accessory power supply phase line utmost point of described electronic circuit board is introduced by the electric leakage tripping coil, and the other end of electric leakage tripping coil is guided on the contact chip, with lead phase line utmost point power supply is guided on the conducting strip that is contained on the pedestal, contact chip and tiller interlock, when contact chip contacted with conducting strip, electronic circuit board obtained working power.