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LW -252 outdoor SF6 circuit breaker
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LW -252 outdoor SF6 circuit breaker
Detail

Specifications:

    LW36-252 type outdoor SF6 gas circuit breaker using modern processing technology and computer-aided design techniques, combined

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

≤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 contactsmm

7812

Creepage distance


                                                           TO earth

7812

16

Mechanical life

times

10,000


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