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LW36-126 SF6 Circuit Breaker

Application: For control and protection of 126, 145kV power system.

Standards:  IEC 62271-100

Main parameters:

  • Rated voltage: 126, 145kV.
  • Rated current: 3150, 4000A.
  • Rated short-circuit breaking current: 40kA.

Features:

  1. Reliable insulation performances.
  2. Utilization of spring operating mechanism.
  3. Low noise, easy or free of maintenance.
  4. Easy installation and adjustment.

No

Item

 

Unit

Technical parameters

1

Rated voltage

KV

126

2

Rated frequency

Hz

50

3

Rated current

A

3150

4

Rated short circuit breaking current

short circuit current

kA

40

DC component

40%

5

Rated short circuit duration

s

4

6

Rated short time withstand current

kA

40

7

Rated short-circuit current ( peak )

kA

100

8

Rated peak withstand current

100

9

Rated power frequency withstand voltage 1min  ( RMS )

phase to ground, phase to phase

kV  

230

Between fracture

265

10

Rated lightning impulse withstand voltage (peak )

phase to ground, phase to phase

550

Between fracture

630

11

5min zero gauge pressure (ms )

Between fracture, phase to ground

95

12

Rated breaking current of step

kA

Ie×25%

13

District fault breaking current

 

Ie×90%,Ie×75%  

14

Rated line charging breaking current

A

50

15

Rated sequence of operations

O-0.3s-CO-180s-CO

16

First pole opening factor

1.5

17

Closing time

ms

≤135

18

Opening time

≤32

19

Breaking time

≤60

20

time of Close and Open

60

21

opening same period

2

22

closing same period

3

23

Rated SF6 gas pressure   (20ºC)

Mpa

0.5

24

SF6 gas leakage rate

≤0.5%

25

Moisture content of gas

ppm(v/v)

≤150

26

level of radio interference  

μV

≤2500

27

mechanical life

 times

6000

28

weight

  kg

1400

29

each filled with SF6 gas   weight

6

30

per pole main circuit resistance

μΩ

40

Working Conditions:

  • Ambient temperature: -40ºC ~ +40ºC
  • Daily temperature variation: 25
  • Pressure: ≤ 700PA
  • Altitude: ≤ 3000m
  • Seismic intensity: ≤ 8 degrees
  • Air Contamination: III grade
  • Sunshine: 0.1 W/cm
  • Relative humidity: Daily average value 95%
  • Monthly average value 90%
  • Wind velocity: 34 m/s
  • Seismic: Horizontal acceleration is 0.250g
  • Vertical acceleration is 0.125g
  • Pollution level: 25mm/kV), 31mm/kV
  • Thickness of ice covering: 10 mm (the wind velocity 15m/s)
  • Protection degree: IP5XW

Note: Customized products are available.

LW36-126 SF6 Circuit Breaker

LW36-126 SF6 Circuit Breaker

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