Electrical Boards

11 KV Station Board:

OBC ( Station Board)

• Tie to 4BA (Unit Board)
• Tie to OBA (Station Board Unit-3)
• ADPH-2 Transformer
• Drives- MDBFP-4C

OBD

• Tie to 4BB(Unit Board)
• CHP-2 Transformer
• HT to station auxiliary board OCB
• Tie to OBB (Station Board Unit-3)

4BA

• HT to unit auxiliary board 4CA-1
• Tie to OBC
• CEP-4A, 4C
• PA fan -4A,
• FD Fan -4A
• ID fan -4A Ch-1 & Ch-2
• CW pump-4A

4BB

• HT to unit auxiliary board 4CA-2
• Tie to OBD
• CEP-4B
• PA fan -4B
• FD Fan -4B
• ID fan -4B Ch-1 & Ch-2
• CW pump-4B

3.3 KV Boards

OCB(Station Auxiliary Board)

• HT to Station Service Board ODB(unit-4)
• HT to BTST-2
• HT to DMPT-2
• HT to WTPT-2
• HT to CWST-2
• HT to Station Service Board ODB (unit-3)
• HT to ODCT02
• HT to ODCT02
• Tie to OCA

4CA-I (Unit Auxiliary Board)

• HT to CTST-4A
• HT to Unit Service Transformer 4DA
• HT to ESP field Transformer A1, B1, C1, D1
• DRIVES- 

1.  ECW pump (TG)-4A,
2.  ECW pump-4A(SG),
3.  BCW pump-4A, 
4.  Mill-4A,4C,4E,4G,4J, 
5.  IAC-2

4CA-II (Unit Auxiliary Board)

• HT to CTST-4B, 4C
• HT to Unit Service Transformer 4DA
• HT to ESP field Transformer A1, B1, C1, D1
• DRIVES- ECW pump (TG)-4B, ECW pump-4B(SG), BCW pump-4B, BCW pump-4C , Mill-4B,4D, 4F, 4H,4K

4DA(Unit Service Board)

• HT to 4KA
• HT to 4KB
• HT to 4HA
• HT To 4HB
• HT to unit ACDB (4QA)
• HT to Boiler ACDB (4HC)