Main technical parameters of circuit breaker
| NO |
Item |
Unit |
Numerical Value |
| 1 |
rated voltage |
kV |
33 |
| 2 |
rated current |
A |
630/1250/1600 |
| 3 |
rated frequency |
Hz |
50 or 60 |
| 4 |
power frequency withstand voltage 1min(wet)(dry) interphase,phase-ground/isolation distance |
kV |
80,95/95 |
| 5 |
lightning shock resistant current(peak) interphase,phase-ground/isolation distance |
kV |
200 |
| 6 |
rated short circuit breaking current |
kA |
31.5/20/25 |
| 7 |
rated short circuit closing current (peak) |
kA |
63/80 |
| 8 |
rated peak withstand current |
kA |
63/80 |
| 9 |
4s short time withstand current |
kA |
31.5/20/25 |
| 10 |
rated operating cycle |
time |
O-0.3s-CO-3s-CO-6s-CO recovery |
| 11 |
rated number of short circuit current breaks |
/ |
30 |
| 12 |
mechanical life |
time |
30000 |
| 13 |
mechanism control voltage |
time |
AC/DC 220 |
| 14 |
secondary circuit 1min power frequency withstand voltage |
kV |
2 |
| NO |
Item |
Unit |
Data |
| 1 |
clearance between open contacts |
mm |
16±1 |
| 2 |
contact overstroke |
mm |
4±0.5 |
| 3 |
opening speed |
m/s |
1.4-1.8 |
| 4 |
closing speed |
m/s |
0.4-0.8 |
| 5 |
contact closing bounce time |
m/s |
5 or less |
| 6 |
center distance between phases |
mm |
460±2 |
| 7 |
three-phase open/close asynchronization |
m/s |
2 or less |
| 8 |
resistance of each phase circuit |
μΩ |
no isolation≤80
isolation≤150 |
| 9 |
closing time |
m/s |
100 or less |
| 10 |
opening time |
m/s |
50 or less |
| 11 |
weight (300 without isolation,380 with isolation) |
kg |
about 300-380 |
