Conductive loop structure of switch device

Abstract

A conductive loop structure of a switch device belongs to the technical field of a low-voltage electric appliance. The conductive loop structure comprises a first wiring terminal, a second wiring terminal, a movable guide rod, a stationary guide rod and a pair of movable contact and stationary contact, which can be separated and closed, wherein one end of the first wiring terminal extends to provide with a connecting guide rod, and the conductive loop structure is characterized in that the stationary guide rod is in noncontact parallel with the connecting guide rod, the end of the stationary guide rod below the movable rod, which is close to the second wiring terminal, is connected with the second wiring terminal, the movable guide rod is connected with the end of the connecting guide rod, which faces towards the second wiring terminal, under the state that a conducted electric loop is formed between the first wiring terminal and the second wiring terminal, and the current direction flowing by the connecting guide rod is identical to that flowing by the stationary guide rod and opposite to that flowing by the movable guide rod. The conductive loop structure has advantages that the breaking time of the fault current can be shortened, and the current limiting capacity of the switch device can be improved; and an arc extinguishing capacity of an arc extinguishing mechanism and the breaking capacity of the switch device can be improved.

Description

technical field [0001] The invention belongs to the technical field of low-voltage electrical appliances, and in particular relates to a conductive circuit structure of a switch device. Background technique [0002] The switchgear mentioned above refers to the low-voltage switchgear. The low-voltage switchgear is essentially a power distribution switch, which is usually used in low-voltage power distribution systems with AC 50Hz or 60Hz and rated In the low-voltage power distribution system with a voltage of 1500V and below, its function is to connect, carry and break the current under normal working conditions of the circuit, and it can also break the fault current under the specified abnormal working conditions of the circuit such as overload and short circuit. Protective effects. [0003] Figure 12 Shown is the conductive circuit structure diagram of the switchgear in the prior art. The switchgear includes an operating mechanism 1, an arc extinguishing mechanism 2 and a...

AI Technical Summary

Problems solved by technology

However, when the movable guide rod 6 moves to the top of the connecting guide rod 41, the first and second section conductors 411, 412 will generate downward suction force on the movable guide rod 6, thereby hindering the movement of the movable guide rod. The continued movement of 6 to the opening direction reduces the current limiting capacity of the switching device, that is, the circuit breaker

In addition, under this structure, since the first and second sections 411, 412 are located above the fixed contact 8 fixed on the third section 413, the installation space of the arc extinguishing mechanism is occupied, so that the switching device such as a circuit breaker is disconnected. The ability to improve is very limited

[0010] The deficiencies of the above-mentioned prior art can be summarized as the following two aspects: one is that the positive magnetic field in the contact arc extinguishing system area of ​​the switchgear is relatively weak, so Affects the driving force or driving effect or driving speed of the movable guide rod in the direction away from the fixed guide rod, so that when encountering a fault current caused by a situation such as an overload or a short circuit, it can be When the moving contact breaks the fault current, it loses instantaneous quickness, which seriously affects the breaking capacity (current limiting capacity) of the switchgear, that is, the circuit breaker; secondly, because the volume of the conductive loop structure in the height direction of the whole switchgear is relatively Larger, thus occupying the proper space of the arc extinguishing mechanism, thus affecting the arc extinguishing ability of the switchgear such as a circuit breaker, and making it difficult to improve the breaking capacity

[0011] In view of the above, the applicant has done a more extensive and in-depth literature search, but all the patents and non-patent literatures that have been disclosed so far have not been found to be eliminated. For the aforementioned lack of technical enlightenment, the applicant has made a beneficial design for this reason, and has formed the technical scheme that will be introduced below

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