CN2558070Y

CN2558070Y - Low-voltage small size plastic shell residual current acted circuit breaker

Info

Publication number: CN2558070Y
Application number: CN 01277185
Authority: CN
Inventors: 林新义; 周霞; 吴有顺
Original assignee: Chint Group Corp
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2001-12-27
Filing date: 2001-12-27
Publication date: 2003-06-25
Anticipated expiration: 2011-12-27

Abstract

The utility model discloses a small low-voltage residual current operated circuit breaker with a plastic shell, comprising a DZ47 serial breaker and a residual current release. The number of the input ends is the same with the number of the output ends. The input wiring base and the output wiring base are oppositely arranged. The volume of the entire device is greatly reduced and the advantage becomes obvious especially for a multi-pole breaker. A zero-sequence transformer used to detect the residual current is arranged between the input wiring base and the output wiring base. The conductor of the main circuit is directly threaded through the zero-sequence transformer. The distance that the conductor threads through the main circuit and reaches the outer wiring end is shortened and the complex coiling problem is solved. The temperature rise is effectively reduced.

Description

A kind of low-voltage miniature plastic shell residual current action breaker

Technical field

The utility model relates to low-voltage electrical apparatus, specifically a kind of low-voltage miniature plastic casing formula residual current action breaker (hereinafter to be referred as leakage switch).

Background technology

Existing leakage switch is that DZ47 Series Circuit Breakers and residual current release assemble, the DZ47 Series Circuit Breakers mainly is made up of insulation crust, operating mechanism, dynamic/static contact, time-delay, instantaneous release, arc control device etc., and the residual current release mainly is made up of zero-sequence transformer, electronics control circuit judge, release connecting rod, test button etc.Its operation principle is: by the current value of zero-sequence transformer induction input and output, the electronics control circuit judge is differentiated, when above-mentioned current value is uneven, control circuit sends a signal of telecommunication, after coil receives signal, inhale moving iron core action, the tripping mechanism dropout that drivening rod promotes circuit breaker produces tripping operation.There is following shortcoming in the leakage switch of said structure:

(1) setting because input junction block and described output junction block stagger, the machine shape size is bigger, in the installation code distribution box, shared spatial volume is big, especially when circuit breaker when being multipole, each utmost point circuit breaker needs a junction block, and each junction block need take the position of a utmost point, the bigger (see figure 1) of the distance that staggers when then wiring being installed;

(2) zero-sequence transformer all is installed in the side of major loop output, drawing lead will walk around zero-sequence transformer and arrive external terminal again, make that whole lead-in wire is longer, the technique for coiling of the major loop lead walks around zero-sequence transformer that more outstanding is is complicated, particularly the technique for coiling that the thicker lead of big current specification is walked around zero-sequence transformer is difficult to realize that temperature rise test is difficult to reach standard-required.

(3) test button of residual current release is flat is embedded in the product casing, because the finger contact area and the great efforts snapshot of oneself ring the reliability of operation, and very inconvenience (as Fig. 3); And owing to there are not spacing shelves, make the spring below the test button produce permanent deformation easily because of too stressed;

(4) input junction block position terminal block exposes, and has both influenced the reliability of finger test, (as Fig. 6) not attractive in appearance again;

(5) trip link of residual current release is in promoting breaker tripping mechanism dropout process, need the rotating shaft of a minor diameter to do fulcrum cooperation transmission, usually, on connecting rod, offer an aperture that matches with described little axle, then little axle is assemblied in this aperture.This aperture is yielding and generation off-centre in the course of processing, influence transmission performance, and the gap of transmission is also big.

Summary of the invention

To be solved in the utility model is that the volume that exists of existing leakage switch is big, the problem of wiring inconvenience.

What the utility model also will solve is the existing improper technique for coiling complexity that causes in leakage switch zero-sequence transformer installation site and the problem of temperature rise.

What the utility model also will solve is the big problem of operation easier of the residual current release test button of existing leakage switch.

What the utility model will solve again is that existing leakage switch input junction block is provided with unsafe problem.

What the utility model will solve again is the problem of existing leakage switch trip link processing small holes difficulty.

The technical scheme that addresses the above problem employing is: a kind of low-voltage miniature plastic shell residual current action breaker, comprise DZ47 Series Circuit Breakers and residual current release, input and output with equal number, described input junction block and described output junction block are oppositely arranged.This being oppositely arranged, described input junction block and described output junction block are separately positioned on the above and below of circuit breaker.

Leakage switch of the present utility model because input junction block and output junction block are oppositely arranged, can reduce machine volume greatly, and for multipole circuit breaker, advantage is more obvious.In theory, leakage switch complete machine width of the present utility model is than the little standard of width extremely wide (9mm) the * number of poles of existing like product.

The zero-sequence transformer that is used to detect residual current is arranged between described input junction block and the described output junction block, the major loop lead directly passes zero-sequence transformer, shorten the major loop lead and passed the length that zero-sequence transformer arrives external terminal again, solve the complicated problems of technique for coiling, and reduced temperature rise effectively.

The test button of described residual current release protrudes and is higher than on the housing, make finger be easy to touch, spacing when pressing by groove, even it is bigger than normal to press test button institute applied pressure like this, can not make the springs distortion yet, improve the operability and the reliability of test button.

Described terminal block is embedded in the enclosure slot, has so both improved the reliability of fingertip, also brings the attractive in appearance of integral body simultaneously.

Described trip link adopts global design, has solved the difficulty of processing aperture, and the big problem of running clearance.

Below in conjunction with drawings and Examples first content of the utility model done and to be described in further detail.

Description of drawings

Fig. 1 is the structural representation that existing leakage switch input and output junction block stagger and be provided with.

Fig. 2 is the structural representation that the utility model input and output junction block are oppositely arranged on the circuit breaker upper and lower.

Fig. 3 is the flat structural representation that is embedded in the product casing of existing leakage switch test button.

Fig. 4 is that the structural representation that is higher than on the housing is protruded in the utility model test button position.

Fig. 5 is the structure side view of the utility model integral type trip link.

Fig. 6 is the structural representation that existing junction block position, leakage switch end of incoming cables terminal block exposes.

Fig. 7 is that junction block position, the utility model end of incoming cables terminal block is embedded in the structural representation in the housing.

Fig. 8 is the structural representation that the utility model input and output junction block are oppositely arranged on the circuit breaker top.

Embodiment

Shown in the accompanying drawing, 1---DZ47 Series Circuit Breakers 2---residual current acting release 3---input junction block 4---output junction block 5---terminal block 6---enclosure slot 7---little axle 9---test button 10---trip link 11---spring 12---limited impression 13---coil 14---iron core 15---zero-sequence transformer

With reference to Fig. 1, low-voltage miniature plastic shell residual current action breaker is made up of DZ47 Series Circuit Breakers 1 (rated current is to 125A) and residual current acting release 2, the DZ47 Series Circuit Breakers is mainly by insulation crust, operating mechanism, dynamic/static contact, time-delay, instantaneous release, compositions such as arc control device, the residual current release is mainly by zero-sequence transformer, the electronics control circuit judge, the release connecting rod, compositions such as test button, product after the assembling has the input and the output of equal number, the input of existing leakage switch is positioned at the top of circuit breaker 1, output is positioned at the below of residual current acting release 2, the two is crisscross arranged, and its shortcoming front was said.With reference to Fig. 2, low-voltage miniature plastic shell residual current action breaker of the present utility model, the input junction block is arranged on the top of circuit breaker, and the output junction block is arranged on the below of circuit breaker, and the two is oppositely arranged.The zero-sequence transformer 15 that is used to detect residual current be arranged on described output junction block 4 directly over.

With reference to Fig. 4, the test button 9 of residual current acting release 2, protrusion is higher than on the housing, also is provided with limited impression 12 in housing, and protection is arranged on springs 11 pressurizeds within reason of test button 9 belows.The terminal block 5 at input junction block place is embedded in enclosure slot 6 positions (as Fig. 7).Trip link 10 and little axle 7 adopt global design, no longer with Φ 1.5 apertures and 7 assemblings of little axle, have solved processing small holes difficulty and connecting rod 10 and have cooperated the big problem of running clearance (as Fig. 5) with little axle 7.

Figure 8 shows that another kind of execution mode of the present utility model, described input junction block 3 and described output junction block 4 are arranged on the top of circuit breaker simultaneously, and other structures are identical with preceding execution mode, also can reach identical effect.

Claims

1. low-voltage miniature plastic shell residual current action breaker, comprise DZ47 Series Circuit Breakers (1) and residual current release (2), input (3) and output (4) with equal number is characterized in that described input junction block (3) and described output junction block (4) are oppositely arranged.

2. low-voltage miniature plastic shell residual current action breaker as claimed in claim 1 is characterized in that described input junction block (3) and described output junction block (4) are separately positioned on the above and below of circuit breaker.

3. low-voltage miniature plastic shell residual current action breaker as claimed in claim 2, the zero-sequence transformer (15) that it is characterized in that being used to detect residual current is arranged between described input junction block (3) and the described output junction block (4).

4. low-voltage miniature plastic shell residual current action breaker as claimed in claim 3 is characterized in that test button (9) protrusion of described residual current release (2) is higher than on the housing.

5. low-voltage miniature plastic shell residual current action breaker as claimed in claim 4 is characterized in that also being provided with in the described housing limited impression (12) of test button (9).

6. low-voltage miniature plastic shell residual current action breaker as claimed in claim 5 is characterized in that described terminal block (5) is embedded in the enclosure slot (6).

7. as any one described low-voltage miniature plastic shell residual current action breaker of claim 1～6, it is characterized in that described trip link (10) adopts global design.