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SF6 Circuit Breaker
Home > Products > SF6 Circuit Breaker



      1.Features

       LW58-252 outdoor three-phase pocelain-pole eletric equipment is new type of circuit breaker.It uses SF6 gas as arc extinction and insulation medium. The arc extinction chamber adopts the world''s leading self-energy double-action acr extinction approach, coupled with  new type spring operating mechanism. It is featured by long service life,  less operating power, low noise and high reliablity. The general technical performance achieve the global leading level.
    
 

      2. Ambinent Conditions

      Ambinent Temperature:      -50oC ¡«+50oC

      Altitude:              ¡Ü2000m

      Wind Speed:    ¡Ü34m/s

      Daily range of Temperature:   ¡Ü25oC 

      Sunlight:           ¡Ü1000W/m2

      Average monthly humidity:  ¡¡¡Ü90%

      Earthquake Level:          Level 8

      Ice Thickness:  ¡Ü10mm

      Air Pollution:     ¡ÜGB/T 5582 Level IV

      Appplication:   Outdoor, without fire, explosion, chemincal corrosion and severe quake

 

 

3. Main technical data of breaker

No

Name

Unit

Value

1

Rated voltage

kV

252

2

Rated power frequency

withstand voltage (1min)

To earth

460

Between interrupter

460+146

3

Rated thunder impulse

withstand voltage

To earth

1050

Between interrupter

1050+206

4

Rated frequency

Hz

50

5

Rated current

A

4000

6

Amplitude factor

 

1.3

7

Rated short-circuit breaking current

kA

50

8

Rated short-circuit making current(peak)

kA

125

9

Rated current withstand current

kA

50

10

Rated peak value withstand value

kA

125

11

Rated short-circuit duration

s

3

12

Rated out-of-phase breaking current

kA

12.5

13

Breaking current of close-in fault

kA

90%lk£¬75%lk

14

Rated line-charging breaking current

A

200

15

Operating sequence

 

O-0.3s-CO-180s-CO

16

Resistance other main circuit

¦Ì¦¸

¡Ü55

17

Rated gauge pressure of SF6(20¡æ)

Mpa

0.6

18

Minimum functional gauge pressure(20¡æ)

Mpa

0.550.015/0.50.015

19

Annual leakage rate of SF6

 

¡Ü0.5%

20

Amount of water of SF6(V/V)

ppm

¡Ü150

21

Mechanical life

times

6000

22

Electrical level of radio interference

¦ÌV

£¼500

23

Creepage distance

To earth

mm

¡Ý8660

Between interrupter

¡Ý6900

24

Weight of the SF6

kg

24

25

Weight of the circuit breaker

kg

1500

Note: external insulation levels is changed by modified coefficient. Every 2000m of altitude ,K=1.13: Altitude 3000m, k=1.28.

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