HXGN15-12-type unit-type ring network cabinet

Application

The rig-net box is suitable for trophies AC 50Hz electric power system for distributing electric emergency. It is widely used electric network reconstruct and construction in cities industrial and mining business high-rise building and common facilities. As the rig-net electrical supplement units and terminal devices, it takes charge of the distribution and control of electric energy and the protection for electrical equipment. It can be also used in box-type substation. this rig-net box complies with pertinent regulations of ( High-voltage AC load switch and fuse combined electric appliances ) and (3-35kv AC metallic packing switch equipment )

Operation environment conditions

1 absolute altitude: less then 1000m.

2 ambient temperature: max +40℃, min-25℃

3 ambient humidity: daily average relative humidity ≤ 95%

 monthly average relative humidity ≤90%  

4ambient air is not apparent polluted by corrosive or flammable gas and water vapor.

5 earthquake-resistance: earthquake intensity less then 8.

6 place without frequent severe shock.

Specification

Code		Item		Unit	Data
1	rated voltage			KV	12
2	rated current		Load cabinet	A	630
			Combined cabinet		125
3	Rated short-circuit close current(peak)			KA	50
4	Rated short-circuit break current			KA	31.5
5	Rated active load break current			KA	630
6	4s thermal stable current			A	20
7	Rated dynamic stable current (peak)			KA	50
8	1min power prequency withstand voltage			KV	42(break port、48)
9	Thunder impulse withstand voltage			KV	75(break port、85)
10	Mechanical life			Time	10000
11	Rated exchange current(combined appliance)			A	3150
12	Operate mode				Manual or motor
13	Protect level				IP2X

 

The structural features

1 structural properties features the shell of rig~net box includes the basic framework, cover-board, enclosed construction comprised by lateral plate. The cover of rig—net box is bus room. and the front of bus room is load switch room, the middle and under of it is in-and-out cable and other components. The main devices of rig-net box are vacuum load switch, isolating switch ( the isolating knife switch with protective fuse ) , earth switch lightning arrester, operating mechanism,interlocking gear and measurement and computation circuit .

2 the rig-net is assembled with vacuum load switch of the type FN25712.the vacuum switch opens failures and excess current, the isolating switch\ vacuum switch\ earth switch and door interlock each other according to some program. which can effectively prevent from misoperations, The vacuum switch box and operation mechanism with electric spring storing energy can switch on and off knife switch last. According to customer' 5 requirements it can assembled with some protective relay, protective fuse combined wiring box, fusion tube with firing pin, under the short circuit condition. the firing pin stock the

knife switch and imply quickly closing and opening, which can effectively protect appliances.

Functional unit

The rig—net box mainly assemblies with two— service—position vacuum load switch of the type FN 25—12D.the main scheme is the incoming line and outlet line box

1) The incoming line box scheme

the box assemblies with two— service—position vacuum load switch of the type FN 25—12D, the CT and PT can be placed in the box freely. The major loop is controlled by vacuum load switch of the type FN 25—12D assembled with isolation and earth knife switch, and can attach to three service positions including switching on generatrix, isolating, earth.

2) The outlet line box scheme

The box assemblies with two— service—position vacuum load switch of the type FN 25—1ZD.R and protective

fuse. the CT and PT and lightning arrester can be placed in the box freely. Hence the computation box can be

omitted

3)“Five preventions" atresia factions

(1)Electric transmission: unless the box door is closed and locked. the console switch is place on the “turn on" . the operation load switch can be closed.

(2)Power-off operation: unless the load switch is on the isolating place, the earth switch can be closed The

door of box can be opened unless the earth switch is on cut—on place and the insulating clapboard is infixed in its place.