8BT2-36 KV
Description
The 8BT2 is a type-tested withdrawable switchgear for indoor installation according to IEC 62271-200 and VDE 0671-200.
Its specification is:
- Loss of service continuity category: LSC 2B (Metal Clad) (1)
- Partition class: PM (Metallic Partition) (2)
- Accessibility to compartments: Busbar compartment = Tool-based / Switching-device compartment = Interlock-controlled / Cable compartment = Interlock-controlled and tool-based
- Internal arc Classification: IAC A FLR (3)
- Arc duration: 1 s
- Maximum ratings: 36 kV / 31.5 kA / 3150 A
- Uses: all transformer and switching substations
Descriptions:
- IEC defines LSC as “the possibility to keep other high-voltage compartments and/or functional units, energized when opening an accessible high-voltage compartment”. LSC 2B is applicable in withdrawable switchgears which the main switching device is independent of other compartments and can be accessed when other parts are live.
- to IEC, PM portion category means dividing the switchgear to separated compartments.
- A= Accessibility type A. This means accessibility restricted to the authorized personnel only. Distance of indicators 300 mm from enclosure is acceptable.
FLR = Access from the front (F = “front”), the sides (L= “lateral”) and the rear (R = rear).
| Rated values | ||
| 36 | 24 | – voltage(Kv) |
| 50/60 | 50/60 | – frequency(Hz) |
| 70 | 50 | – short-duration power- frequency withstand voltage(KA) |
| 170 | 125 | – lightning impulse withstand voltage(KA) |
| 31٫5 | 31٫5 | – short-circuit breaking current(KA) |
| 31٫5 | 31٫5 | – short-time withstand current, 3 s(KA) |
| 82 | 82 | – short-circuit making current(KA) |
| 82 | 82 | – peak withstand current(KA) |
| 3150 | 3150 | – normal current of busbar(KA) |
| 3150 3150 3150 3150 |
3150 3150 3150 3150 |
– normal current of feeders: with circuit-breaker (A) with disconnector link (A) bus sectionalizer (A) busbar connection panel (A) |
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