24kV indoor SF6 load break switch(switch disconnector)
BRFLN36-12an indoor high-voltage SF6 load switch, an switchgear with the rated voltage of 36kV/40.5kV, adopted with SF6 gas as an arc-extinguishing and insulation medium, including the three contactors for switching-on and switching-off and to-ground, and is characteristic in its small volume, its convenient installation and operation and its the great adaptability with surroundings.
BRFLN36-12 of an indoor high-voltage SF6 load switch and BRFLN36-12D of SF6 load switch plus fuse combination can function to protect and control the electric equipments for power supply and transformer substations especially being suitable for ring net cabinet, cable branch cabinet and distribution switching substation.
BRFLN36-12 of an indoor high-voltage SF6 load switch and BRFLN36-12D load switch plus fuse combination are complied with the standards of IEC60265-1-1998, IEC60420 etc.
a) Air temperature
Maximum temperature: +40℃; Minimum temperature:-5℃
b) Humidity
Monthly average humidity 95%; Daily average humidity 90% .
c) Altitude above sea level
Maximum installation altitude: 2500m
d) Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
e) No frequent violent shake
|
No |
Item |
Unit |
Parameter |
|
|
1 |
Rated voltage |
kV |
36 |
|
|
2 |
Rated frequency |
Hz |
50/60 |
|
|
3 |
Rated current |
A |
630 |
|
|
4 |
1min Power frequency withstand voltage |
wet |
kV |
95 |
|
dry |
kV |
110 |
||
|
5 |
Lightning impulse withstand voltage |
kV |
185/215 |
|
|
6 |
Rated short circuit breaking current (peak) |
kA |
50 |
|
|
7 |
Rated active load and close circuit breaking current |
A |
50 |
|
|
8 |
Rated transferring current |
A |
1000 |
|
|
9 |
Rated short circuit making current (peak) |
kA |
50 |
|
|
10 |
Rated cable(line) charging breaking current |
A |
50 and 10 |
|
|
11 |
Cable charge breaking current in earthing fault |
A |
20 |
|
|
12 |
Rated withstand current (peak) |
kA |
50 |
|
|
13 |
Short time withstand current (2s) |
kA |
20 |
|
|
14 |
Mechanism life |
times |
2000 |
|
Note: For short circuit breaking and peak current is based on Fuse plus combination.
Primary loop of BRFLN36-12 indoor load break switch and its combination is sealed in a epikote casted insulate unit by APG technology, this insulate unit has features of good insulating property, dust and dirts proof, insulate unit contains upper and lower insulate covers, inside charged 1.5bars pressure SF6 gas, the partial siding of lower cover is very thin, it's a protective measure and will burst out in the malfunction, the over pressed gas is released to protect the equipment.
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