FN12-12D/630-20 type indoor AC high voltage load switches
FN12-12(R)D/125-31.5 type AC high voltage load switch- fuse combination units
FN12-12D/630-20 type indoor AC high voltage load switches is a rated voltage of 10KV, rated frequency 50Hz three-phase high-voltage switch equipment ,for the closing and opening load current, loop current, air containing transformers and cable charging current, short circuit current of the Closing. Equipped with grounding switch load switch that can withstand short-circuit current.
FN12-12 (R) D/125-31.5 type AC high voltage load switch- fuse combination units, is the FN12-12D load switch and S Δ LAJ-12 (XRNTΔ -10) high-voltage current-limiting type fuse combination units together in the indoor high voltage switchgear. It can be a reliable short-circuit breaking current up to any current; load switch breaking current, the fuse short-circuit breaking current breaking joint working between the current and total short-circuit current of any over-current, fuse through its impact to load switches opening.
Mainly technical parameters
No | Item | Unit | Value | |
1 | Rated voltage | kV | 10 | |
2 | Rated frequency | Hz | 50 | |
3 | Rated current | A | 630 | 100 |
4 | Lightning impulse withstand voltage | kV | Earth and phase 75, insulating fracture 85 | |
5 | 1min power frequency withstand voltage | kV | Earth and phase 42, insulating fracture 48 | |
6 | Rated thermal current | kA | 20(4S) | |
7 | Rated dynamic current | kA | 50 | |
8 | Rated closed current (peak) | kA | 50 | 50 |
9 | Rated short-circuit breaking current (predictive value) | kA | 31.5 | |
10 | Max I2t on critical breaking current | A2S | Comply with fuse characteristic curve | |
11 | Min breaking current | kA | Comply with fuse characteristic curve | |
12 | Rated transfer current | kA | 1.5 | |
13 | Max breaking current (reference value) | kA | 1.8 | |
14 | Breaking no-load transformer capacity | kVA | 1250 | |
15 | Rated cable charged current | A | 10 | |
16 | Rated power load current breaking times | times | >100 | |
17 | Breaking times of striker with load-switch | S | >0.06 | |
18 | Earth switch thermal current | kA | 20(2S) | |
19 | Earth switch thermal current (peak) | kA | 50 | |
20 | Motor operate power voltage | V | AC DC current 110, 220 | |
