Bus-Bar Protection Schemes

 Bus-Bar Protection Schemes.

    500, 400, 275, 220 and 132 KV. Bus-Bar Protection Scheme.

   - Differential Protection For each section of bus-bar.

   - SF6 Pressure low Trip.                                 

 

    66 and 33 KV. Bus-Bar Protection Scheme.

   - Differential Protection For each section of bus-bar or Arc protection or Micro switch protection.

-         SF6 Pressure low Trip.

 

     22 and 11 KV BUS-Bar Protection Scheme.

   - Arc protection or Micro switches protection.

 

     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).
 

     132 KV BB section & BB couplers protection scheme.

       - I.D.M.T Non Directional O/C & E/F Relay.

       - C.B Fail to Trip.
 

     33 KV BB section & BB couplers protection scheme.

        - I.D.M.T Non Directional O/C & E/F Relay.

 

     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.

     I.D.M.T Non Direction O/C & E/F relay.

     Inter Trip (through pilot cable – SHR connected through cable C.B. “for 132 kV only”).

     Buchhols Trip.

     Oil Temperature Trip.

     Winding Temperature Trip.

     Cable oil pressure Low Trip. (For cable tails)

     SF6 pressure Low Trip.

     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.

     I.D.M.T Non Direction O/C & E/F relay.

     Buchhols Trip.

     Oil Temperature Trip.

     Winding Temperature Trip.

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