ZCW10-72.5 3150-31.5 outdoor load break switch 72.5KV
ZCW10-72.5/L open-type combined electrical apparatus is a complete set of combined electrical apparatus using air as external insulation SF6 gas as arc extinguishing medium. For the control and protection of three-phase AC 72.5KV transmission and distribution system, it can also be used for connecting circuit breakers and opening and closing capacitor banks. It is suitable for urban substations, enterprise substations and mountain substations with land shortage.
Structural characteristics
The circuit breaker, isolating switch, grounding switch, current transformer, bus and other components are organically combined on the grounded steel structure support, which has a compact structure. It occupies only 30%-50% of the space of the split type, and has significant characteristics such as saving land and reducing project cost. The entire interval is prefabricated in the factory, and all the assembly and debugging are completed before the factory, and the whole is transported to the installation site, which greatly reduces the installation cycle. The use of fully verified high-performance arc extinguishing chamber, isolation switch, basically no maintenance, high reliability. The factory prefabricated self-supporting busbar in the compartment does not require the user to repair the frame. Flexible layout, can be used for a variety of wiring methods. The circuit breaker can be repaired or replaced as a whole, and the power failure time can be reduced to less than 3 hours due to body failure.
Technical parameter
|
Item |
Unit |
Data |
|
Rated voltage |
KV |
72.5 |
|
Rated power frequency |
Hz |
50/60 |
|
Rated current |
A |
3150 |
|
Rated power frequency withstand voltage (1min) KV |
Isolating |
200 |
|
To ground |
160 |
|
|
Rated lightning impulse withstand voltage (1min) KV |
Isolating |
410 |
|
To ground |
350 |
|
|
Rated short-circuit breaking current |
KA |
31.5 |
|
Rated withstand current(peak) |
KA |
80 |
|
Rated short-time withstand current(3s) |
KA |
31.5 |
|
Rated short-circuit making current(peak) |
KA |
80 |
|
Phase to phase spacing |
mm |
1200 |
|
Moving contactor travel |
mm |
120 |
|
Moving contactor overtravel |
mm |
25 |
|
Opening time |
ms |
40 |
|
Closing time |
ms |
100 |
|
Trip time |
ms |
60 |
|
First pole to clear factor |
|
1.5 |
|
Rated out-of-phase breaking current |
KA |
8 |
|
Short-line fault breaking capability |
KA |
90%IK/75%IK |
|
Rated line-charging breaking current |
A |
10 |
|
Rated operation sequence |
|
O-0.3s-CO-180s-CO |
|
Main circuit resistance |
μΩ |
≤55 |
|
Rated SF6 gas pressure(20℃) |
Mpa |
0.5 |
|
Rated minimum SF6 gas pressure(20℃) |
Mpa |
0.45 |
|
SF6 gas leakage rate(yearly) |
Mpa |
≤0.5% |
|
Gas moisture content |
ppm |
≤150 |
|
Mechanism life |
times |
10000 |
|
Radio interference |
μV |
＜500 |
|
Creepage distance (mm) |
Isolating |
2585 |
|
To ground |
2248 |
|
|
Control system voltage |
V |
220DCV/ACV |
|
Mass of filled SF6 gas |
Kg |
10 |
|
Mass of equipment |
Kg |
1500 |
|
Dimension W*D*H |
mm |
4100*2500*4200 |
