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Help Center12KV FN12-12 Indoor H.V. Load Break Switch (LBS)
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Specifications
1.Voltage: 12KV2.Current: 400A
3.For breaking or closing load and over-load current
4.Fuse can be allocated
12KV FN12-12 Indoor H.V. Load Break Switch (LBS)
Summary
It is a three phase H.V. switch equipment of 12KV, 50Hz for breaking or closing load current., no-load transformer cable charging current and closing short-circuit current. The load switch with earth switch can bear short-circuit current.
It is made up of FN12-12D load switch and S()LAJ-12(XRNT()-10) H.V. current-limiting fuse box. It can break any current, load switch breaking working current and fuse box breaking short-circuit current, jointly breaking any current between short-circuit current. Meantime, fuse box make the switch off of with the striker.
Application
It is used in the ring network city distribution and industrial equipment of 12KV and three-phase AC 50Hz to cortrol load and short-circuit. Because the switch with fuse protecting transformer etc more reliably than circuit breaker. It is especialy suitable for ring network clouble radial distribution and package substation.
Standard
a. GB3804-90 <<3-63KV AC H.V load switch>>.
b. GB16926-1997 <<High-voltage alternating current switch-fuse combinations>>(eqv, IEC62271-2002).
c. GB1995-89 <<AC H.V isolate switch and earth switch>>.
Service Condition
A. The ambient air temperature: Max.: +40 °C. Min: -10 °C.
B. The altitude ≤ 1000m.
C. The relatire humidity of air. daily average ≤ 90%. monthly average ≤ 95%.
D. The ambient air should not be obviously polluted by corrosivity or the flammability gas and geam. etc.
E. Without frequent shake.
F. Enviroment degree: grade Ⅱ.
If requirements are not mentioned above, users can fix them with the manufacturer.
Technical Parameter and Performances
Number |
Name |
Unit |
FN12-12D/630-20 |
FN12-12D.R/100-31.5 |
1 |
Rated voltage |
kV |
12 |
|
2 |
Rated frequency |
Hz |
50 |
|
3 |
Reated current |
A |
630 |
100 |
4 |
Lighting impulse resisting voltage |
kV |
75/85 |
|
5 |
1min power frequency with stand voltage |
kV |
42/48 |
|
6 |
Rated heat - stability current |
kA |
20(4S) |
|
7 |
Rated machine-stability current |
kA |
50 |
|
8 |
Rated closing current (peak) |
kA |
50 |
|
9 |
Rated short-circuit breaking current |
kA |
|
31.5 |
10 |
Rated transfer current |
kA |
|
1.5 |
11 |
Max. breaking current |
kA |
1.8 |
|
12 |
Breaking no-load transformer capacity |
Kva |
1250 |
|
13 |
Rated cable charging current |
A |
10 |
|
14 |
Rated power load current breaking times |
time |
>100 |
|
15 |
Switch-off time of rated power load current switch on-and-off |
S |
|
>0.06 |
16 |
Earth switch heat-stability current |
kA |
20(2S) |
20(2S) |
17 |
Earth switch heat-stability curreak (peak) |
kA |
50 |
50 |
18 |
Motor operating power valtage |
V |
AC220,DC48 |
|
Installation diagram
Packing
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