CN203434506U - A 40.5kV armored movable indoor AC metal-enclosed switchgear - Google Patents

Abstract

The utility model discloses a 40.5kV armored movable indoor AC metal-enclosed switchgear. A breaker 6 may slide on guide rails 7 in a cabinet rack 1. Movable contacts 5 are installed on the breaker 6. Wall bushings 12 are fixedly installed on the cabinet rack 1 and are used for supporting and installing a vertical current bus 10. Each current phase is provided with two contact boxes 3 which are fixedly installed on the cabinet rack 1 in the up and down direction. Binding posts 2 are embedded in the contact boxes 3. One end of each binding post 2 is connected with the vertical current bus 10, while the other end of each binding post 2 is used for fixing static contacts 4. A current transformer 9 is fixed on the lower rear portion of the cabinet rack 1. The binding post 11 of the current transformer 9 is connected with the binding post 2 in a bottom contact box 3 through the vertical current bus 10. The 40.5kV armored movable indoor AC metal-enclosed switchgear has advantages of guaranteeing air insulation clear distance not to be less than 300mm, guaranteeing internal arcing grade to reach IAC, and guaranteeing the partial discharge amount of the whole cabinet not to be more than 50 pC under test voltage 1.1 times of nominal voltage.

Description

The indoor ac metal closing switch gear of a kind of 40.5kV armored withdraw type

Technical field

The utility model relates to the indoor ac metal closing switch gear of a kind of 40.5kV armored withdraw type, belong to voltage switch equipment technical field.

Background technology

Along with the development of China's urban and rural power grids capacity-increasing transformation promotion of item and electric power network grows, electricity market constantly increases the demand of high technology content, high-quality switchgear.In recent years under the policy of China's development equipment manufacture, the designing and manufacturing level of China's high voltage switchgear is also improving year by year, the designing and manufacturing level of simultaneously more external famous brand names is also improving year by year, and abroad some esbablished corporations are also strengthening Chinese Electricity Market Competition dynamics.In the face of domestic and international switch industry development situation, the competitive pressure in market grows with each passing day.The demand of electricity market not only shows quantitatively, but also shows in high-quality, the high reliability of product.

Through technology transfer and self-developing for many years, the 40.5kV switchgear of China has obtained very large progress in technical merit, but at high parameter, high-performance, large current product, slower development in the miniaturization of high parameter, high-performance, large electric current particularly.National grid has been promulgated respectively trial version and the revised edition of 18 the great anti-accident measures > of electrical network > of < < State Grid Corporation of China at 2005,2012, all 40.5kV switchgear has been proposed to explicitly call for, for example air insulation clear distance is not less than 300mm, IAC AFLR arcing grade etc.But at present,, the 40.5kV switchgear that meets its requirement not yet has report.

Summary of the invention

The utility model proposes the indoor ac metal closing switch gear of a kind of 40.5kV armored withdraw type, its be to guarantee that switchgear is wide in 1400mm situation at existing cabinet, meet air insulation clear distance and be not less than 300mm, alternate and over the ground air insulation clear distance be all not less than 300mm; Inner arcing grade meets IAC level (AFLR-31.5kA-0.8s), to guarantee equipment operator's safety; Under the test voltage of 1.1 times of rated voltages, the partial discharge quantity of switchgear is not more than 50pC.And switchgear should have preferably technical parameter and preferably electric and mechanical performance, guarantee fail safe, the reliability and stability of switchgear operation.

Technical solution of the present utility model: the indoor ac metal closing switch gear of a kind of 40.5kV armored withdraw type, comprise tank bracket, circuit breaker summation current transformer, it is characterized in that: the front bottom of tank bracket is fixed with two horizontal C type guide rails, roller is equipped with in circuit breaker bottom, roller is located on C type guide rail, and moving contact is installed on circuit breaker; On tank bracket, be fixed with wall bushing, and for supporting and install the vertical current bus of horizontal direction, vertical current bus adopts rectangular bus bar; Each electric current item is provided with two contact boxs, the upper and lower of contact box is fixedly mounted on tank bracket, contact box inside is embedded with binding post, binding post one end is connected with vertical current bus, the other end of binding post is fixed with fixed contact, rear lower at tank bracket is installed with current transformer, and current transformer connecting terminal is connected with the binding post in lower contact box by vertical current bus.

Advantage of the present utility model: 1) metal armoured design, what cabinet adopted high-quality covers aluminium zinc steel plate, after double bending, adopt high-strength bolt to connect assembled, the C type guide rail that circuit breaker supports and travels, guaranteed the enforcement of the moving-out type technology of switchgear, and cost can reach and minimizes; 2) contact box and wall bushing adopt shielding structure design, are inside provided with gauze screen, and adopt the inside and outside umbrella skirt construction design of formula straggly, have increased creepage distance, and the anti-soil that has improved switchgear dodges ability, and has guaranteed enough little partial discharge quantity; 3) in the cabinet that has limited switchgear wide (1400mm) situation, changed under the project organization and mounting structure of the conduction part of electric current, guaranteed that air insulation clear distance is not less than 300mm, alternate and over the ground air insulation clear distance be all not less than 300mm; Inner arcing grade has reached IAC level (AFLR-31.5kA-0.8s); And under the test voltage of 1.1 times of rated voltages, the partial discharge quantity of whole cabinet is not more than 50pC.Improve switchgear safety in operation, reliability and stability, and effectively reduced manufacturing cost.

Accompanying drawing explanation

Fig. 1 is that the indoor ac metal closing switch gear embodiment of 40.5kV armored withdraw type of the present invention is positioned at the structural representation of isolation/test position at circuit breaker.

Fig. 2 is the structural representation that is positioned at service position at circuit breaker embodiment illustrated in fig. 1.

In figure 1 is tank bracket, the 2nd, binding post, the 3rd, contact box, the 4th, fixed contact, the 5th, moving contact, the 6th, circuit breaker, the 7th, guide rail, the 8th, roller, the 9th, current transformer, the 10th, vertical current bus, the 11st, current transformer connecting terminal, the 12nd, wall bushing.

Embodiment

In Fig. 1 and Fig. 2, express an indoor ac metal closing switch gear of 40.5kV armored withdraw type, wherein omitted side plate parts, only represented the support tank bracket 1 with circuit breaker 6 that can withdraw-type for received current conduction portion.

As shown in drawings, the indoor ac metal closing switch gear of a kind of 40.5kV armored withdraw type, its structure comprises tank bracket 1, circuit breaker 6 summation current transformers 9, in the front bottom of tank bracket 1, be fixed with the C type guide rail 7 of two horizontal arrangement, roller 8 is equipped with in circuit breaker 6 bottoms, roller 8 can slide in C type guide rail 7, and moving contact 5 is installed on circuit breaker 6.On tank bracket 1, fixedly mount wall bushing 12, and for supporting and install the vertical current bus 10 of horizontal direction.Each electric current item is provided with two contact boxs 3, contact box 3 is fixedly mounted on tank bracket 1 up and down, contact box 3 inside are embedded with binding post 2, binding post 2 one end are connected with vertical current bus 10, the other end is fixed contact 4 fixedly, binding post 2 is vertical plane with joint face and the binding post 2 of vertical current bus 10 with the joint face of fixed contact 4, and the line mode of contact box 3 is vertical line mode.Rear lower at tank bracket 1 is installed with current transformer 9, and current transformer connecting terminal 11 is connected with the binding post 2 of lower contact box 3 by vertical current bus 10.

During work, when circuit breaker 6 sails switchgear into along guide rail 7, only, when circuit breaker 6 is in position shown in Fig. 1, be isolation/test position, can realize maintenance and the test adjustment of switchgear.At circuit breaker 6, along guide rail 7, continue to travel, only, when circuit breaker 6 is in position shown in Fig. 2, be service position, the moving contact 5 of its switchgear is connected with fixed contact 4; Now, the normal occlusion of circuit breaker 6 divides, and can realize conducting and the disconnection of whole current circuit in switchgear, i.e. current supply circuit through and off.

Claims (2)

1. the indoor ac metal closing switch gear of 40.5kV armored withdraw type, comprise tank bracket, circuit breaker summation current transformer, it is characterized in that: the front bottom of tank bracket is fixed with two horizontal C type guide rails, roller is equipped with in circuit breaker bottom, roller is located on C type guide rail, and moving contact is installed on circuit breaker; On tank bracket, be fixed with wall bushing, and for supporting and install the vertical current bus of horizontal direction, vertical current bus adopts rectangular bus bar; Each electric current item is provided with two contact boxs, the upper and lower of contact box is fixedly mounted on tank bracket, contact box inside is embedded with binding post, binding post one end is connected with vertical current bus, the other end of binding post is fixed with fixed contact, rear lower at tank bracket is installed with current transformer, and current transformer connecting terminal is connected with the binding post in lower contact box by vertical current bus.

2. the indoor ac metal closing switch gear of a kind of 40.5kV armored withdraw type according to claim 1, it is characterized in that described binding post and the joint face of vertical current bus and the joint face of binding post and fixed contact are vertical plane, the line mode of contact box is vertical line mode.

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