Bus bar protection
2
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.
Transcript of Bus bar protection
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.
