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LW39-126 outdoor AC high voltage SF6 circuit breaker
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1000

LW39-126 outdoor AC high voltage SF6 circuit breaker

LW39-126 outdoor AC high voltage ceramic pole type SF6 circuit breaker can be used in power systems with a frequency of 50Hz and a nominal system voltage of 110kV. It is the main power equipment for control and protection in power plants and substations. The circuit breaker adopts the principle of thermal expansion and self-energy arc extinguishing, and is filled with SF6 gas with excellent arc extinguishing performance and electrical insulation performance. All seals adopt double-ring O-rings, which can effectively prevent gas leakage. It is equipped with a CT30 spring. The operating mechanism realizes three-phase mechanical linkage operation.
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Product serial number
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1
Detail
Parameters
Features
Technical Parameter
Case

LW39-126 outdoor AC high voltage ceramic pole type SF6 circuit breaker can be used in power systems with a frequency of 50Hz and a nominal system voltage of 110kV. It is the main power equipment for control and protection in power plants and substations. The circuit breaker adopts the principle of thermal expansion and self-energy arc extinguishing, and is filled with SF6 gas with excellent arc extinguishing performance and electrical insulation performance. All seals adopt double-ring O-rings, which can effectively prevent gas leakage. It is equipped with a CT30 spring. The operating mechanism realizes three-phase mechanical linkage operation.

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  1. The breaking performance is stable, and it can reliably break the faults such as short-circuit, out-of-step, and near zone at the outlet end;

  2. The structure of the interrupter is simple, reliable, and easy to maintain;

  3. Long electrical life, with the ability to break 20 times at full capacity, and maintenance-free for 10 years under normal operating conditions;

  4. Small operating force, simple and reliable compact spring operating mechanism is adopted;

  5. The rated inflation pressure of the gas is low, which can adapt to low temperature conditions;

  6. Small footprint;

  7. Low noise level, suitable for residential areas;

  8. Long maintenance period and low maintenance workload;

  9. On-site installation and debugging time is short.

Serial number

Name

unit

Parameter

1

System nominal voltage

kV

110

2

Rated voltage

kV

126

3

Rated frequency

Hz

50/60

4

Rated current

A

3150

5

Rated short-circuit breaking current

kA

31.5

40

6

Rated short-circuit making current (peak value)

kA

80

100

7

Rated short-time withstand current (thermal stability current)

kA

31.5

40

8

Rated peak withstand current (dynamic stability current)

kA

80

100

9

Rated short-circuit duration (thermal stability time)

s

4

3

10

First open coefficient

 

1.5

11

Lightning impulse withstand voltage

kV

650

12

1min power frequency withstand voltage

kV

275

13

Creepage ratio

mm/ kV

25/31

14

Rated operating sequence

 

O-0.3s-CO-180s-CO

15

Closing time

ms

≤110

16

Breaking time

ms

≤65

17

Close-time

ms

≤85

18

Closing time

ms

80±5

19

Opening time

ms

33±7

20

Number of fractures per pole

1

21

Main circuit resistance

μΩ

≤45

22

Mechanical life

Times

10000

23

SF6 gas pressure (20℃)

Rated value

Mpa

0.55

0.60

Alarm value

Mpa

0.50

0.55

Blocking value

Mpa

0.45

0.50

24

SF6 moisture content

ppm(V/V)

≤150

25

SF6 annual leakage rate

 

≤1%

26

Auxiliary circuit voltage

V

AC220

27

Closing coil

Voltage

V

DC220

DC110

Current

A

2

3.3

28

Opening coil

Voltage

V

DC220

DC110

Current

A

2

5.8

29

Energy storage motor

Voltage

V

AC220/DC220

power

W

600

30

Energy storage time

s

≤15

Ningbo Tianan (Group) Co., Ltd. was founded in 1969, covers an area of 1298 acres, more than 1800 employees. Is a focus on smart grid, "new infrastructure", "integrated smart energy" and other fields of power distribution switching equipment research and development, production, sales and service of the national key high-tech enterprises.

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