FN7-12 Series indoor high voltage load switch and fuse combination
Technical specification
|
Rated voltage(KV) |
12 |
||
|
Insulation level |
1min frequency voltage(KV) |
Phase to phase, to earth 42 |
Isolation fracture48 |
|
Lightning impulse withstand voltage(KV) |
Phase to phase, to earth 75 |
Isolation fracture85 |
|
|
Rated current(A) |
400 |
630 |
|
|
4S Rated thermal current(KA) |
12.5 |
20 |
|
|
Rated active load breaking current(KA Peak) |
31.5 |
50 |
|
|
Rated short circuit making current(KA peak) |
31.5 |
50 |
|
|
Item |
Model |
DS |
DX |
L |
R |
RA |
F |
Use |
|
|
Grounding switch incoming fedder side |
Grounding switch outgoing fedder side |
Interlock device |
Fuse |
Impact fuse |
Electric sub-gate devices |
||||
|
Load Switches |
Non-impact fuse |
FN7-12 |
- |
- |
- |
- |
- |
- |
Line load switch |
|
FN7-12DSL |
△ |
- |
△ |
- |
- |
- |
|||
|
FN7-12DXL |
- |
△ |
△ |
|
|
|
|||
|
FN7-12R |
- |
- |
- |
△ |
- |
- |
Transformer Protection |
||
|
FN7-12DSLR |
△ |
- |
△ |
△ |
- |
- |
|||
|
FN7-12DXLR |
- |
△ |
△ |
△ |
- |
- |
|||
|
With impact fuse |
FN7-12RAF |
- |
- |
- |
- |
△ |
△ |
||
|
FN7-12DSLRAF |
△ |
- |
△ |
- |
△ |
△ |
|||
|
FN7-12DXLRAF |
- |
△ |
△ |
- |
△ |
△ |
|||
Dimension
Product Functions
◆Load Current Breaking: Safely breaks load currents in 12kV AC power systems under normal operating conditions.
◆Short-Circuit Making: Capable of closing onto short-circuit currents, ensuring safety during fault conditions.
◆Comprehensive Protection (with Fuse): When combined with a fuse, the apparatus can interrupt any current value, making it suitable for full-range protection applications.
◆Versatile Switching: Designed to handle various current types, from normal load currents to fault currents, serving both switching and protection purposes.
Applicable Environment
◇Rated System: Suitable for 50Hz, 12kV three-phase AC power distribution systems.
◇Wide Temperature Range: Reliable operation in ambient temperatures from -25℃ to +40℃, with special suitability for alpine regions down to -40℃.
◇Installation Altitude: Designed for installation at elevations up to 1000 meters.
◇Humidity Tolerance: Withstands daily average humidity ≤95% and monthly average ≤90%.
◇Air Quality: Requires environment free from corrosive gases, flammable vapors, and obvious pollution.
◇Stability: Suitable for locations without recurrent severe vibration.
Product Highlights
◆Cold-Climate Adaptability: Specifically designed to operate reliably in alpine regions with temperatures as low as -40℃, making it ideal for northern installations.
◆Full-Range Protection Capability: Unlike standard switches that only break load currents, this model can make short-circuit currents and, with fuse integration, interrupt any current value for complete protection.
◆Compact Indoor Design: Engineered for indoor installation with a space-saving footprint, ideal for substations and distribution rooms.
◆Dual-Purpose Functionality: Serves both as a switching device for normal operations and as a protective device during fault conditions, reducing the need for separate components.
◆Robust Construction: Built to withstand harsh environmental conditions including high humidity and extreme temperatures while maintaining stable performance.