Overview
LW8(A)-40.5 outdoor AC high-voltage sulfur hexafluoride circuit breaker is a three-phase AC 50Hz outdoor high-voltage electrical appliance. It uses SF6 gas as the arc extinguishing and insulating medium. It adopts a compressed air arc extinguishing structure. It has extremely strong breaking capacity and can be widely used. It is used in the power system with a rated voltage of 40.5KV. As a substation, the power plant switches the rated current and short-circuit current, and can be used as a contact circuit breaker and a capacitor bank. The built-in current transformer is used for measurement and protection. It is an updated product of the circuit breaker.
Model meaning
Technical Parameters
|
Project |
Unit |
Value |
|
|
Rated voltage |
KV |
40.5 |
|
|
Rated insulation level |
Lightning impulse withstand voltage (full wave peak) |
KV |
185 |
|
Power frequency withstand voltage (1min) |
KV |
95 |
|
|
Rated current |
A |
2000 |
|
|
Mechanical life |
times |
3000 |
|
|
Rated pressure of sulfur hexafluoride gas (gauge pressure at 20°C) |
MPa |
0.45 |
|
|
Alarm pressure/minimum functional pressure (20℃ gauge pressure) |
MPa |
0.4 |
|
|
Rated short circuit breaking current |
KA |
40 |
|
|
Rated short circuit making current (peak value) |
KA |
100 |
|
|
Rated short-time withstand current (thermal stable current) |
KA |
40 |
|
|
Rated short-time withstand current (dynamic stable current) |
KA |
100 |
|
|
Rated out-of-step breaking current |
KA |
10 |
|
|
Cumulative breaking times under rated short-circuit breaking current |
times |
12 |
|
|
Cumulative breaking time at rated short-circuit breaking current |
S |
4 |
|
|
Closing time (under rated operating voltage) |
S |
≤0.15 |
|
|
Opening time (under rated operating voltage) |
S |
≤0.06 |
|
|
Rated operating sequence |
|
C-0.3s-CO-180s-CO |
|
|
Rated switching current of a single capacitor bank |
A |
400 |
|
|
Annual air leakage rate |
%/Year |
≤0.5 |
|
|
Moisture content of sulfur hexafluoride gas (V/V) |
|
≤150 x 10 -6 |
|
|
Closing coil, opening coil voltage |
V |
DC 110 220 |
|
|
Energy storage motor voltage |
V |
AC,DC 110 220 |
|
|
Sulfur hexafluoride gas weight |
Kg |
8 |
|
|
Weight of circuit breaker (including operating mechanism) |
Kg |
1400 |
|
Appearance and installation diagram
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