with the latest generation of spring bodies and the advantages of a permanent institution. Its pursuit of high reliability, easy to maintain design concepts to create ageneration of superior product, is the most reliable electric power system and the best option.

All series switches meet the following criteria:

ANS/IEEE C37.60/IEC 62271-100(GB1984-2003 China standard)

GBT11022-1999 China Standard
IEC 60255-11
IEC 60255-21-1 Class I
IEC 60255-21-2 Class I
IEC 60255-21-3 Class I
IEC 60255-22-1 Class III
IEC 60255-22-2 Class IV
IEC 60255-22-3 Class III
IEC 60255-22-4 Class IV

Using of the enviroment:

Ambient temperature:-40℃~+40℃, the daily average temperature:25℃;

Altitude:≤ 3000m（in excess of the value of technical discussions with the divisionI);

Wind speed：35m/s;

Earthquake intensity: not more than 8 degrees;

Degree of ambient air contamination level not greater than:III level;

Daily average ambient air relative humidity≤95%, on average≤90%;

Saturated vapor pressure of daily mean values≤ 2.2*10^(-3)MPa, on average≤1.8*10^(-3)MPa;

More about the use of environment conditions, please consult with the manufacturer.

Main technical specifications:

No.	Item	Unit	Data
1	Rated voltage	KV	252
2	Rated frequency	Hz	50/60
3	Rated current	A	4000
4	1min power frequency withstand voltage	KV	460
5	Lingthning impluse withstand voltage(peak value	KV	325
7	Rated short circuit breaking current	KA	50
	Rated peak withstand current	KA	125
8	Rated out-of-phase breaking current	KA	12.5
9	Rated cable(line) charging breaking current(peak)	A	160
10	Rated gas pressure	MPa	0.6
11	Main loop resistance	uΩ	≤60
12	Operation sequence		O-0.3s-CO-180s-CO
13	SF6 gas leakage rate(per year)	%	≤1
14	Moisture content(V/V)	ppm	≤150
15	Across the open contacts	mm	7812
	Creepage distance
	TO earth		7812
16	Mechanical life	times	10,000

Note: For short circuit breaking current & rated current is optional by clients.