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LW3 12 I.II SF6 HV Outdoor Circuit Breaker

  • Units in Stock: 100

LW3-12 I.II SF6 HV Outdoor Circuit Breaker

  LW3-12 I.II SF6 HV outdoor circuit breaker is a new type product that SF6 is taken for insulating and arc extinguishing. The arc-chute consists of a breaker and an operative mechanism, using rotating arc principle. Compared with the 10KV series outdoor breakers, this kind of product has obvious advantages, such as a simple structure, the higher reliability of insulating and arc extinguishing, a lower operative power, and a higher rated parameter, a longer electrical service life, a long maintenance free duration, and so on.
      This kind of product can be divided into two types:Type I and Type II. The main difference is that, type I is fitted with a kind of manual energy -storage mechanism operated by spring, mainly used on the pillar, and type II is equipped with motor-driven energy -storage mechanism operated by spring which not only can be operated by hand directly or be controlled remote, but also can do coincide automatically, mainly used in the mini-medium substation for protecting and controlling.

Type designation :


Technical parameter of this High Voltage outdoor circuit breaker  :

NO

Name

Unit

Data

1

Rated voltage

KV

12

2

Rated insulating level(the pressure of SF6 in the breaker is 0.25Mpa, the temperature is 20 )

Lightning impulse withstand voltage
(full wave)

KV

75

Rated 1min power frequency withstand voltage

42

The voltage withstand test under the condition of raining

34

3

The insulating level under zero pressure
(the pressure on the highest phase is 5min)

KV

9

4

Rated current

A

400 630

5

Rated short-circuit breaking current

KA

6.3 8 12.5

6

The breaking current under  zero pressure of t

A

400 630

7

Rated short-circuit breaking times

Times

20

8

Rated operative sequence

Type I

 

Off-180s-on/off-
180s- on/off

Type II

Off -0.5s- on/off -
180s- on/off

9

Rated short-circuit breaking current

(peak value)

KA

16 20 31.5

10

Rated peak withstand current

(peak value)

KA

16 20 31.5

11

Rated short-time withstand time

S

4

12

Rated short-time withstand current

KA

6.3 8 12.5

13

Rated operating pressure

M Pa

0.35

14

The lowest operating pressure

M Pa

0.25

15

Annual leak rate

&

<=1

16

Mechanical Endurance

Times

2000

17

Weight

Type I

Kg

122

Type II

130