Item | Unit | Load switch | ||
ZFN21 vacuum | ZFN11-12 vacuum | FN11-10 pressure-operated | ||
Rated voltage Max working voltage Rated frequency Rated current Rated short-time withstand current Rated short-time withstand current of ground circuit Rated peak withstand current Rated peak withstand current of ground circuit |
KV KV Hz A KA/s KA/s KA KA |
10 12 50 630 20/4 20/4 50 50 |
10 12 50 630 20/3 20/3 50 50 |
10 12 50 400、630、800 20/3 20/3 50 50 |
Rated no-load transformer breaking current Main circuit, ground circuit and rated short-circuit making current Rated short-circuit breaking current of fuse Electric life at rated current Mechanical life |
KA KA KA Times Times |
6000kVA transformer 50 31.5 1000 1000 |
1250kVA transformer 50 31.5 100 200 |
|
1min power frequency withstand voltage (effective value) To-ground/phase across the isolating distance |
KV | 42/48 | ||
Power frequency withstand voltage isolating distance (effective value) | KV | 53 | ||
Lightning impulse withstand voltage (peak) To-ground and phase-to-phase/across the isolating distance |
KV | 75/85 | ||
1min power frequency withstand voltage of secondary circuit | KV | 2 | ||
Rated switching current | A | 3150 | 1300 |