overview
FZN25-12D/630-20 AC high voltage load switch is an indoor device with three-phase AC 50Hz and rated voltage of 12kV. It is suitable for industrial and mining, enterprises, distribution stations, substations and other occasions. It is used for the protection and control of electrical facilities, including load current, closed-loop current, no-load transformer and cable charging current.
Equipped with manual and electric motor operating mechanisms, it facilitates the implementation of the three remote control requirements for the power system.
FZRN25-12D/T125-31.5 AC high-voltage vacuum load switch fuse combination is an indoor device with three-phase AC 50Hz and rated voltage of 12kV. It is suitable for load control and short-circuit protection in industrial and mining, enterprises, distribution stations, and substations. The equipped grounding switch can withstand short-circuit current. The operating mechanism can be manual or electric, making it easy to achieve the three remote control requirements of the power system.
FZN25-12D and FZRN25-12D load switches and combination devices are suitable for use in urban distribution stations and industrial electrical equipment with three-phase ring networks or terminal power supply, for load control and short-circuit protection. Due to its more reliable and economical protective effect on electrical equipment such as transformers compared to circuit breakers, composite appliances are particularly suitable for ring networks, dual radiation power supply units, and box type substations.
·Technical parameters
Serial Number |
project |
unit |
parameter |
||
FZN25-12D/T630-20 |
FZRNN25-12DR/T100-31.5 |
||||
1 |
Rated voltage |
kV |
12 |
||
2 |
Rated frequency |
Hz |
15 |
||
3 |
Rated current |
A |
630 |
100 |
|
4 |
Rated insulation level |
1-minute power frequency withstand voltage (effective value) |
kV |
Arc extinguishing chamber fracture 30; |
|
Ground and phase 42; Isolation fracture 48 |
|||||
Lightning impulse withstand voltage (peak value) |
kV |
Ground and phase 75; Isolation fracture 85 |
|||
5 |
Rated dynamic stability current (peak value) |
kA |
50 |
|
|
6 |
4S thermal stability current |
kA |
20 |
|
|
7 |
Rated active load breaking current |
A |
630 |
|
|
8 |
Rated closed-loop breaking current |
A |
630 |
|
|
9 |
Rated cable charging breaking current |
A |
10 |
|
|
10 |
Rated breaking capacity of no-load transformer |
kVA |
1600 |
||
11 |
Rated transfer current |
A |
|
2000 |
|
12 |
Fuse model |
|
|
SDLAJ-12,SFLAJ-12 |
|
13 |
Impactor output energy |
J |
|
2-5 (moderate) |
|
14 |
Rated short-circuit closing current |
kA |
50 |
||
15 |
Rated dynamic stability current (peak value) of grounding switch |
kA |
50 |
||
16 |
Grounding switch 2S thermal stability current |
kA |
20 |