General:
FZN25-12 Indoor AC HV vacuum Load break switch and FZRN25-12D Indoor AC HV vacuum load break switch with assembly fuse is the controlling and protecting equipment of three-phase 50Hz, 12kv distribution system, which is widely used in the situations of industrial and mining establishiments and power distribution station of urban buildings. Combined electrical apparatus can protec transformer and other electric equipments. it is used more reliable than circuit breaker. esbecially, it can be perfectly used in terminal substation and box-type substation of urban net and rural net in order to control and protect ring net birabdial electric unit.
Standard:
a. GB38041.1-90 <<3-63KV AC H.V load switch>>.
b. GB16926-97 <>
C. IEC265-1 HV Load Switch No.1 : Rated voltage between 1kv and 52kv high voltage load switch
d. IEC420(1990). <>
| No. |
Name |
Unit |
FZN25-12/630-20 |
FZN25-12/(R)D125-31.5 |
| 1 |
Rated voltage |
kV |
12 |
| 2 |
Rated frequency |
Hz |
50 |
| 3 |
Reated current |
A |
630 |
less than 200 |
| 4 |
Rated insulating level |
1min power frequency withstand voltage |
kV |
30 |
| 42/48 |
| Lightning impulse resisting voltage |
kV |
75/85 |
| 5 |
Rated 4S heat - stability current |
kA |
20 |
| 6 |
Rated duration of short circuit |
S |
4 |
| 7 |
Rated dynamic current |
kA |
50 |
|
| 8 |
Rated active load breaking current |
A |
630 |
|
| 9 |
Rated closed loop breaking current |
A |
630 |
|
| 10 |
Rated cable charging current |
A |
10 |
|
| 11 |
Breaking no-load transformer capacity Max. breaking current |
kvA |
1600 |
| 12 |
Rated short circuit breaking current |
KA |
|
31.5 |
| 13 |
Rated transfer current |
A |
|
2000 |
| 14 |
Fuse model |
|
|
SDLAJ-12,SFLAJ-12 |
| 15 |
Impactor output energy |
J |
|
2-5 |
| 16 |
Rated short circuit closing current |
kA |
50 |
80(expected peak) |
| 17 |
Earth switch heat-stability current |
KA |
20 |
| 18 |
Earth switch rated duration of short circuit |
S |
2 |
| 19 |
Auxiliary loop rated pressure |
V |
220,110 |
| 20 |
Mechanical endurance |
operations |
10000 |
