CN2497420Y

CN2497420Y - Load switch for combined transformer

Info

Publication number: CN2497420Y
Application number: CN 01250068
Authority: CN
Inventors: 刘刚
Original assignee: Fang Yuzhou
Current assignee: Fang Yuzhou
Priority date: 2001-07-13
Filing date: 2001-07-13
Publication date: 2002-06-26
Anticipated expiration: 2011-07-13

Abstract

A load switch used in a combination typed transformer to open, break and switch the power source comprises an operation device, an energy storage device, a principal axis, a moveable arc contactor, a moveable contact contactor, a static contactor, a support, etc. When the power supply mode of the power source needs to be changed or the power source of the transformer needs to be cut off, through the operation of a handle, the energy storage mechanism stores energy, after going over a dead point, a spring releases energy and rapidly drives the principal axis and the moveable contact to rotate with load so as to change the wiring mode. The contact of the utility model has simple structure, long mechanical and electrical life, is convenient for use, and is suitable for the combination typed transformer.

Description

The combined transformer on-load switch

The utility model relates to a kind of on-load switch that is used for combined transformer.

American in the market case becomes with the on-load switch structure shown in Fig. 1,2,4.Its moving contact 5 is simpler with fixed contact 7 structures, and its load is cut-off main fast rotational machinery by moving contact and elongated distance between itself and fixed contact, and arc extinguishing is realized the purpose of cut-offfing under oily medium effect.The mechanical wear of motion is born at the contact position that contacts in this structure, electric wearing and tearing when cut-offfing are born in its bight, make that the whole materials requirement of contact is very high or make it can not satisfy the conduction contact well simultaneously, the mechanical wear functional requirement, especially this switch directly is installed in the transformer built-in electrical insulation medium, its machine, electrical wear will have a direct impact and endanger dielectric behavior, for overcoming these deficiencies, some switch producers have to adopt the isolation grease chamber with switch medium and transformer dielectric isolation, the switch cost is improved, bulky, simultaneously, its internal contamination just is unfavorable for switch work after big.

The purpose of this utility model is to avoid above-mentioned weak point and a kind of simple in structure, installation, use, easy maintenance, on-load switch that reliability is high is provided.

The purpose of this utility model realizes by following scheme.Have operating mechanism 1, install and compositions such as positioner 2, main shaft 3, switch bearing 4, moving contact 5, fixed contact 7.It is characterized in that fixed contact 7 is provided with quiet arc contact 8 and static load stream contact 9, moving contact is fixed on the main shaft 3, and fixed contact then is fixed on the bearing 4.

In the such scheme, quiet arc contact 8 and static load stream contact 9 are center of circle layout radially straggly with main shaft 3, and quiet arc contact 9 can be or wire distribution at 2.

According to such scheme, principal character of the present utility model is that fixed contact is a composite construction, thereon with the most Mechanical Wear Process in the interrupting process of contact and all cut-off arc process and bear by compound quiet arc contact 8 and moving arcing contact 12 thereon, the contact function of operating state is then born by dynamic and static current carrying

contact

9,10, machinery, the electrical endurance of switch contact improved greatly, reduced switch and cut-off pollution oil.Simultaneously each function contact is selected the unlike material manufacturing for use, also further reduces material cost, improves performance and reliability, is cut-offfing capacity when little, and dynamic and static contact can each be used the same material manufacturing, and cost is low.

In the such scheme, it is the footpath of the center of circle circle layout straggly that makes progress that quiet arc contact 8 and static load stream contact 9 is distributed in the main shaft, and quiet arc contact 9 can be or wire at 2 and distributes.

During above structural design certain mechanical action program is arranged, the size that is embodied in each contact cooperates, and makes its course of action satisfy operation program demand and program nargin demand.Its operation program is that dynamic and static current carrying contact contact → dynamic and static arcing contact contact and current carrying contact separation → dynamic and static arcing contact cut-off the dynamic and static arcing contact contact of (generation electric arc) → reposition (during multistation) → dynamic and static current carrying contact contact → dynamic and static arcing contact separation.

The utility model is simple in structure, makes easily, is widely used on the various on-load switches.

Following structure accompanying drawing illustrates an embodiment of the present utility model.

Fig. 1 is an existing product fixed contact front view.

Fig. 2 is the B-B view of Fig. 1.

Fig. 3 is the front view of an embodiment of the present utility model.

Fig. 4 is the moving contact front view of embodiment of the present utility model.

Fig. 5 is the fixed contact front view of embodiment of the present utility model.

Fig. 6 is the A-A view of Fig. 5.

An embodiment of the present utility model is shown in Fig. 3-6.Be 2 station on-load switches of a three-phase, operating mechanism 1 and installation and positioner 2 are arranged outside the case lid 11, in energy storage device 6 is arranged, the centre is coated with rotating shaft 3, be fixed with moving contact 5 in the rotating shaft, correspondence disposes fixed contact 7 on the bearing 4, flexible hold down gag on the fixed contact 7, dynamic load stream contact 10 and arcing contact 12 when capacity (big use alloy) are positioned on the moving contact, with corresponding configuration on the fixed contact, no pressure contacts between quiet arc contact and moving contact and moving arcing contact when the service position, the dynamic and static current carrying contact loaded current that contacts.Also be furnished with point-like quiet arc contact 8 on the fixed contact 7, each quiet arc contact 8 flows contact in layout radially straggly with static load.According to performance need, the contact that respectively matches can be selected identical or different material for use, and arcing contact is generally by are-tight alloy manufacturing.

In the such scheme, certain proper working procedure is arranged between dynamic/static contact.

The utility model is simple in structure, advanced in performance, is applicable on the medium and small volume load switch.

Claims

1, a kind of on-load switch that is used for combined transformer has compositions such as operating mechanism 1, installation and positioner 2, main shaft 3, energy storage device 6, switch bearing 4, moving contact 5, fixed contact 7.It is characterized in that fixed contact 7 is provided with quiet arc contact 8 and static load stream contact 9, the corresponding moving contact that is provided with is fixed on the main shaft 3, and 7 of fixed contacts are fixed on the bearing 4.

2,, it is characterized in that quiet arc contact 8 and static load stream contact 9 is a center of circle layout radially straggly with main shaft 3 by the described on-load switch of claim 1.

3,, it is characterized in that can be or wire distribution at 2 for quiet arc contact 9 by claim 1 or 2 described on-load switches.