Description
FN7-12(24)Series
FN7-12(24) is used for three-phase AC 50/60Hz 12kV, 24kV power systems. They used for breaking load current and controlling short-circuit current. FN7-12R type M.V load switch-fuse combination is based on the FN7-12 series M.V load switch, then put the operating mechanism on the side, as customer order
Specifications
FN7-12(24)Series
Technical Specification | |||||
Rated voltage | kV | 12 | 24 | ||
Rated current | A | 400 | 630 | 630 | |
Rated power frequency | Hz | 50/60 | 50/60 | 50/60 | |
Short circuit making capacity | kA Peak. | 31.5 | 50 | 50 | |
Peak withstand current | kA Peak. | 31.5 | 50 | 50 | |
Short time current | kA eff. | ||||
1Sec. | 25 | 25 | 25 | ||
3Sec. | 12.5 | 20 | 20 | ||
Max. breaking capacity in co-operation with fuses IEC 62271-105 (IEC 420 1990-11) | A | 1600 | 1600 | 900 | |
Max. fuse current(XRNT Fuse) | A | 200 | 200 | 200 | |
Power frequency withstand voltage 50Hz 1 min,: | |||||
– To earth and between poles | kV | 42 | 42 | 55 | |
– Across isolating distance | kV | 48 | 48 | 70 | |
Impulse withstand voltage 1.2/50μ s: | |||||
– To earth and between poles | kV | 75 | 75 | 125 | |
– Across isolating distance | kV | 85 | 85 | 145 | |
Mechanism Endurance | cycles | 2000 | 2000 | 2000 | |
Drawing
FN7-12(24)Series
