LW3-12 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.
|
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 |
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 |
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- |
|
|
Type II |
Off -0.5s- 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 |
|||
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