FZN25-12D/T630-20 Type indoor AC high voltage load switches
FZRN25-12D/T125-31.5 indoor AC high voltage load switches-Fuse combination units
FZN25-12D/T630-20 Type Indoor AC switch is three-phase AC 50Hz, rated voltage of 12kV and indoor installations, for industrial and mining enterprises for distribution in clinics and substations and other occasions, as electrical protection and control facilities for the division and load current, loop current, no load transformer and cable charging current.
FZRN25-12D / T Δ -31.5 type indoor AC high voltage vacuum load switch- fuse combination units is three-phase AC 50Hz, rated voltage of 12kV for indoor installations for industrial and mining enterprises and other occasions to change the station distribution Institution for load control and short circuit protection purposes. Equipped with grounding switch can withstand short-circuit current. Actuator can be manual and electric, easy remote control three power system requirements.
FZN25-12D, FZRN25-12D-type load switch and the combination of electric three-phase are for city distribution and industrial power equipment of three phase ring network or terminal power supply ,for load control and short circuit protection. As the combination of electrical transformers and other electrical equipment on the protective effect than the circuit more reliable, more economical, especially for rings, double radiation power supply units and box-type substation.
Mainly technical parameters
No | Item | Unit | Value | ||
1 | Rated voltage | kV | 12 | ||
2 | Rated frequency | Hz | 50 | ||
3 | Rated current | A | |||
4 | Rated insulation level | 1min power frequency withstand voltage | kV | Arc-quenching chamber fracture 30 | |
(effective value) | Earth ,phase 42, insulating fracture 48 | ||||
Lightning impulse withstand voltage (peak) | Earth ,phase 75, insulating fracture 85 | ||||
5 | Rated dynamic current (peak) | kA | 50 | ||
6 | 4S thermal current | kA | 20 | ||
7 | Rated power load breaking current | A | 630 | ||
8 | Rated closed-loop breaking current | A | 630 | ||
9 | Rated cable charge breaking current | A | 10 | ||
10 | Rated breaking no-load transformer capacity | kV | 1250 | ||
11 | Rated transfer current | A | 2000 | ||
12 | Fuse model | SDLAJ-12 | |||
13 | Striker output energy | J | 2~5 | ||
14 | Rated short-circuit closed current | kA | 50 | 80(predictive value) | |
15 | Earth switch rated dynamic current | kA | 50 | ||
16 | Earth switch 2s thermal current | kA | 20 | ||
17 | Auxiliary circuit rated voltage | V | ~220 ~110 | ||
18 | Mechanical life | times | 10000 | ||
19 | Opening time of fuse trigger | ms | — | 30~40 | |
20 | Opening time of tripper trigger | ms | 40~50 | ||
