CN202957502U

CN202957502U - Extraction type low-voltage circuit breaker

Info

Publication number: CN202957502U
Application number: CN 201220667715
Authority: CN
Inventors: 晏卫江; 王炯华; 管瑞良; 陈志刚; 黄剑
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2012-12-07
Filing date: 2012-12-07
Publication date: 2013-05-29
Anticipated expiration: 2022-12-07

Abstract

An extraction type low-voltage circuit breaker belongs to the technical field of low-voltage electric apparatus. The extraction type low-voltage circuit breaker comprises a breaker body, an extraction type base, a secondary connector and an interlocking device. The breaker body comprises a plug-in piece; the interlocking device is installed at the bottom of the breaker body; the extraction type base comprises a binding post and an acting face; the secondary connector comprises a wire holder and a connector assembly; and the extraction type low-voltage circuit breaker can switch among a separation position, a testing position and a power-on position. The extraction type low-voltage circuit breaker is characterized in that when the extraction type low-voltage circuit breaker is at the separation position, first contact distance between the plug-in piece and the binding pole is L1, second contact distance between the connector assembly and the wire holder is L2, third contact distance between the interlocking device and the action face is L3, L1 is larger than L2, and L3 is larger than L2. The extraction type low-voltage circuit breaker has the advantages of being simple in structure, convenient to install and safe and reliable in utilization, avoiding poor contact between the plug-in piece and the binding post and effectively guaranteeing normal operation of the breaker.

Description

The pull-out type low-voltage circuit breaker

Technical field

The utility model belongs to the low voltage electrical apparatus technology field, is specifically related to a kind of pull-out type low-voltage circuit breaker.

Background technology

Along with the development of circuit breaker technology, the function of circuit breaker is more and more stronger, and the pull-out type low-voltage circuit breaker is exactly a kind of extension of circuit breaker function.The pull-out type low-voltage circuit breaker is operated in the mode of plug, makes as between the breaker body of moving part and socket as standing part and realizes connecting or separating, and brings great convenience to the maintenance of user's O&M.In order to ensure operator's use safety, according to relative national standards regulation, just drawer mechanism should be equipped with and only have, to allow insulating contact separately or closed interlock again after the main contact of circuit breaker disconnects.That is to say, do not allow aforesaid moving part (being breaker body) to be extracted or update with respect to standing part (being socket) under "on" position at the circuit breaker main contact, so on general pull-out type low-voltage circuit breaker, interlock all is installed.

Interlock on conventional pull-out type low-voltage circuit breaker, it comprises a pin, this pin is stretched from molding outer casing inside, for matching with the breaker mechanism release lever, specifically: when pin, during in extended position, just can stop closing of power circuit breaker, and make circuit breaker in off-state; And just described release lever can be discharged when pushing pin, circuit-breaker is connected.Although this structure can guarantee to be inserted or extract operation under situation that circuit breaker separates at main contact, exist circuit breaker not insert before socket the shortcoming that can't be closed minute and the annex in secondary circuit is detected circuit breaker.

In view of above-mentioned prior art, be necessary existing pull-out type low-voltage circuit breaker structure is improved, for this reason, the applicant has done actively and effectively to attempt, and technical scheme described below produces under this background.

Summary of the invention

Task of the present utility model is that a kind of pull-out type low-voltage circuit breaker will be provided, it not only simple in structure, cost is low, easy for installation, safe and reliable, and can when extracting position out, be tested at equipment.

task of the present utility model completes like this, a kind of pull-out type low-voltage circuit breaker, comprise breaker body, the pull-out type base, secondary plugging-in element and interlock, described breaker body comprises the sheet that patches be connected with the breaker body upper connecting terminal, described interlock is arranged on the bottom of breaker body, described pull-out type base comprises with described and patches the binding post of sheet inserting and corresponding and can make the thread off acting surface of tripping operation of breaker body by activating interlock with described interlock, described secondary plugging-in element comprises the junction block be arranged on the pull-out type base and is arranged on the connector assembly on breaker body, described connector assembly is used for and described junction block inserting, described pull-out type low-voltage circuit breaker can be changed between separation point position and test position and on-position, it is characterized in that: at the pull-out type low-voltage circuit breaker during in separation point position, describedly patch first between sheet and described binding post and contact distance for L1, between described connector assembly and described junction block second contacts distance for L2, between described interlock and described acting surface the 3rd contacts distance for L3, L1>L2 wherein, L3>L2.

In a specific embodiment of the present utility model, described the 3rd contact distance L 3 contacts distance L 1, wherein L1>L3 with described first.

The utility model, due to after adopting said structure, has advantages of: simple in structure, easy for installation, safe and reliable, can not cause the problem that patches loose contact between sheet and binding post; Simultaneously, by increasing the test position of pull-out type low-voltage circuit breaker, this position can be closed minute and the annex in secondary circuit is tested circuit breaker, thereby effectively guarantees circuit breaker energy regular event.

The accompanying drawing explanation

Fig. 1 is the structural representation of pull-out type low-voltage circuit breaker in separation point position.

Fig. 2 is the structural representation of pull-out type low-voltage circuit breaker in test position.

Fig. 3 be the pull-out type low-voltage circuit breaker by test position to the structural representation in the on-position transfer process.

Fig. 4 is the structural representation of the utility model pull-out type low-voltage circuit breaker at on-position.

In figure: 1. breaker body, 11. patches sheet, 12. operating mechanisms, 121. pull bars; 2. pull-out type base, 21. binding posts; 3. secondary plugging-in element, 31. connector assemblies, 311. move contact pin components, 32. junction blocks, 321. quiet contact pin components; 4. interlock, 41. push rods; 42. push rod; L1. first contact distance; L2. second contact distance; L3. the 3rd contact distance.

Embodiment

In order to make the public can fully understand technical spirit of the present utility model and beneficial effect; the applicant will be described in detail embodiment of the present utility model below by reference to the accompanying drawings; but the applicant is not the restriction to technical scheme to the description of embodiment, anyly according to the utility model design, changes in the form rather than substance all and should be considered as protection range of the present utility model.

Refer to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, a kind of drawout breaker of the utility model, comprise breaker body 1, pull-out type base 2, secondary plugging-in element 3 and interlock 4.Described breaker body 1 comprises and patches sheet 11 and operating mechanism 12, is provided with in described operating mechanism 12 and can makes the thread off pull bar 121 of action of operating mechanism, described pull-out type base 2 comprises for described, patching the binding post 21 of sheet 11 insertings and acting surface 22 corresponding with described interlock 4 and that can make breaker body 1 thread off and trip by activating interlock 4, described interlock 4 is arranged on the bottom of breaker body 1, and this interlock 4 comprises push rod 41 and the push rod 42 for coordinating with acting surface 22 for matching with described pull bar 121, in the present embodiment, described secondary plugging-in element 3 refers to the connector of controlling auxiliary circuit (being often referred to secondary circuit) in drawout breaker, described secondary plugging-in element 3 comprises the junction block 32 be arranged on pull-out type base 2 and is arranged on the connector assembly 31 on breaker body 1, described junction block 32 comprises the quiet contact pin component 321 that one or more structure is identical, described connector assembly 31 comprises the moving contact pin component 311 that one or more structure is identical equally, the position of each moving contact pin component 311 is corresponding with the position of each quiet contact pin component 321, both can mutually patch and realize being electrically connected to, the pull-out type low-voltage circuit breaker by separation point position in the test position transfer process, when described acting surface 22 does not contact in described interlock 4 push rod 42, the time that patches between the moving contact pin component 311 of each on described connector assembly 31 and described each quiet contact pin component 321 patched on sheet 11 will be prior to the described time that patches patched between sheet 11 and binding post 21.Specifically:

When breaker body 1, with pull-out type base 2 during in separation point position, i.e. the operation of breaker body 1 and described pull-out type base 2 is during to state as shown in Figure 1.Suppose that pull-out type base 2 is fixing, breaker body 1 is shifted to pull-out type base 2, described patch sheet 11 and described binding post 21 between the two first contact the distance that distance L 1 moves for breaker body 1 when patching sheet 11 now state is realized being electrically connected to both with binding post 21, moving contact pin component 311 described in secondary plugging-in element 3 and quiet contact pin component 321 between the two second contact distance L 2 for moving contact pin component 311 distance that breaker body 1 moves when now state is realized being electrically connected to both with quiet contact pin component 321, in described interlock 4 acting surface 22 of push rod 42 and described pull-out type base 2 between the two the 3rd contact distance L 3 for push rod 42 and acting surface 22 now state realize the distance that breaker body 1 moves when contact activated to both, L1>L2, L3>L2, and L1>L3.

When breaker body 1 inserts pull-out type base 2, because the push rod 42 in interlock 4 does not also contact with acting surface 22, push rod 41 does not also activate the pull bar 121 in operating mechanism 12, circuit breaker can divide (Fig. 2) by normal occlusion, now the moving contact pin component in secondary plugging-in element 3 311 has been connected with quiet contact pin component 321, and the sheet 11 that patches in major loop is not also connected with binding post 21, this position claims test position, test position can be closed minute and the annex in secondary circuit is tested circuit breaker, guarantees circuit breaker energy regular event.

When interlock 4 moves to certain position (as shown in Figure 3), push rod 42 in interlock 4 contacts with pull-out type base 2, and then promotion push rod 41, promote the pull bar 121 in operating mechanism 12 and cause circuit breaker tripping, guaranteed circuit breaker before inserting the major loop switch in off-state, thereby guaranteed that patching in the binding post 21 on sheet 11 and pull-out type base 2 on breaker body 1 do not have electric current to produce, and just can not cause the problem of loose contact yet.

Continue to consult Fig. 4, after breaker body 1 inserts pull-out type base 2 fully (as shown in Figure 4), be moving contact pin component 311 in secondary plugging-in element 3 with quiet contact pin component 321 between and patch between sheet 11 and binding post 21 and all realized fully being electrically connected to, now in interlock 4, push rod 41 resets, and switch can divide by normal occlusion again.When breaker body 1 under "on" position when pull-out type base 2 is extracted out, along with separating of pull-out type base 2 and breaker body 1, in breaker body 1 is extracted operation with respect to socket 2, when push rod 42 moves downward under spring-force driven dual, and then promotion push rod 41, and push rod 41 pushing drawing rods 121, thereby promoted the operating mechanism 12 release tripping operations of circuit breaker by pull bar 121, guarantee breaker body 1 before extracting in off-state, the sheet 11 that patches on breaker body 1 disconnects subsequently with the binding post 21 on pull-out type base 2, after breaker body 1 is extracted certain distance with respect to socket 2, moving contact pin component 311 in secondary plugging-in element 3 disconnects with quiet contact pin component 321 again, finally realized circuit breaker first breaking circuit breaker when closing position carries out the body extraction, the binding post patched on sheet and pull-out type base on breaker body disconnects subsequently, thereby can not produce the phenomenon of loose contact, reach the safe and reliable purpose of circuit breaker with this.

Claims

1. a kind of pull-out type low-voltage circuit breaker, comprise breaker body (1), pull-out type base (2), secondary plugging-in element (3) and interlock (4), described breaker body (1) comprise with the breaker body upper connecting terminal, be connected patch sheet (11), described interlock (4) is arranged on the bottom of breaker body (1), described pull-out type base (2) comprises with described and patches the binding post (21) of sheet (11) inserting and corresponding and can make the thread off acting surface (22) of tripping operation of breaker body (1) by activating interlock (4) with described interlock (4), described secondary plugging-in element (3) comprises the junction block (32) be arranged on pull-out type base (2) and is arranged on the connector assembly (31) on breaker body (1), described connector assembly (31) for described junction block (32) inserting, described pull-out type low-voltage circuit breaker can be changed between separation point position and test position and on-position, it is characterized in that: at the pull-out type low-voltage circuit breaker during in separation point position, describedly patch first between sheet (11) and described binding post (21) and contact distance for L1, between described connector assembly (31) and described junction block (32) second contacts distance for L2, between described interlock (4) and described acting surface (22) the 3rd contacts distance for L3, L1>L2 wherein, L3>L2.

2. Pull-out type low-voltage circuit breaker according to claim 1, is characterized in that described the 3rd contact distance L 3 contacts distance L 1, wherein L1>L3 with described first.

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