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 |