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Bus-Bar
Protection Schemes.
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500, 400, 275, 220 and 132 KV. Bus-Bar Protection Scheme.
- Differential Protection For each section of bus-bar.
- SF6 Pressure low Trip.
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66 and 33 KV. Bus-Bar Protection Scheme.
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Differential Protection For each
section of bus-bar or Arc protection or Micro switch protection.
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SF6 Pressure low Trip.
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22 and 11 KV BUS-Bar
Protection Scheme.
- Arc
protection or Micro switches protection.
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500, 400, 275, and 220 KV BB section & BB couplers protection
scheme.
- I.D.M.T Non Directional O/C & E/F Relay.
- C.B Fail to Trip.
- SF6 Pressure Trip.
- Inter Trip (through pilot cable).
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132 KV BB section & BB couplers protection scheme.
- I.D.M.T Non Directional O/C & E/F Relay.
- C.B Fail to Trip.
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33 KV BB section & BB couplers protection scheme.
- I.D.M.T Non Directional O/C & E/F Relay.
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11 KV BB section & BB couplers protection scheme.
- I.D.M.T Non Directional O/C & E/F Relay.
Shunt Reactor Protection Scheme.
275 &132 KV. Shunt Reactor Protection
Scheme.
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I.D.M.T Non Direction O/C &
E/F relay.
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Inter Trip (through pilot
cable – SHR connected through cable C.B. “for 132 kV only”).
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Buchhols Trip.
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Oil Temperature Trip.
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Winding Temperature Trip.
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Cable oil pressure Low Trip.
(For cable tails)
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SF6 pressure Low Trip.
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C.B Fail to trip. (For 132
KV. C.B only).
33
KV. Shunt Reactor Protection Scheme for both connected
to 33 KV Bus-Bar or to tertiary of 300 MVA Transformer.
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I.D.M.T Non Direction O/C & E/F relay.
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Buchhols Trip.
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Oil
Temperature Trip.
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Winding Temperature Trip.
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