Item | Unit | Data |
open distance between contacts | mm | 8-10 |
contacts pressure spring stroke | mm | 3-4.5 |
distance between phases | mm | 150/210/275 |
out of simultaneity of C/O operations | ms | ≤2 |
contact bounching duration at closing operation | ms | ≤1 |
average closing speed | m/s | 0.4~0.8 |
average opening speed | m/s | 1.0~1.4 |
closing time | ms | ≤60 |
opening time | ms | ≤30 |
main circuit resistance | uΩ | ≤100(280) |
wear thickness of moved and fixed contact | mm | 3 |
S.N. | Name | Unit | VLF-12 load switch | VLFR-12 load switch | VLF-12 vacuum circuit breaker |
1 | rated voltage | kV | 12 | 12 | 12 |
2 | rated power frequency withstand voltage 1min | kV | 42 | 42 | 42 |
3 | rated lighting impluse withstand voltage | kV | 75 | 75 | 75 |
4 | rated current | A | 630 | 125 | 630 |
5 | rated short circuit breaking current | kA | 50 | 25 | |
6 | rated short circuit withstand current | kA | 20 | 25 | |
7 | rated peak withstand current | kA | 50 | 63 | |
8 | rated short circuit making current | kA | 50 | 63 | |
9 | rated cable charging breaking current | A | 30 | ||
10 | rated breaking transfer current | A | 3150 | ||
11 | breaking no-load transformer | kVA | 1250 | 1250 | |
12 | electrical endurance | cycles | 10000 | 10000 | 10000 |
13 | partial discharge magnitude | PC | ≤5 | ≤5 | ≤5 |