STG Local Braker (GT Hall) Should be OFF.

7 STG Local BKR Closing T5-367 & T5-368

STG LOCAL BREAKER PNL NC From 3A-65 & 3A-66. ref.STG PNL-15 SS#01 STG I/C PNL SS#01 SHOULD BE ON.

6 STG I/C Closing 3A-43 & 3A-44 PNL NO 15 SS#01 NC From T1-16 & T1-18. ref.STG

Local PNL Drawing

GTG Local Braker (GT Hall) Should be OFF.

7 GTG Local BKR Closing T5-367 & T5-368

GTG LOCAL BREAKER PNL NC From 3A-65 & 3A-66. ref.GTG PNL-09 SS#01 GTG I/C PNL SS#01 SHOULD BE ON.

(2) TB2-35 & TB2-36 (SEC-B OF CRP PNL S/YD C/R)

NC

NC

(1) Aux. contactor K100 (Ref SCP PNL DRG.SHEET 15/1) (2) TB 3A-35&3A-36 :52D Relay in PNL-10 SS#01. Before closing Xmer Breaker 52B OR 52-E, Downstream

11 Kv Grid I/C-1 OR 11 Kv Grid I/C-2 Breaker at SS#01 11 Kv PNL should be OFF.

Closing

(1) TX-151 & TX-152 (SCP PNL SEC-3 CCPP C/R) NC

Sr No BREAKER INTERLOCK INTERCONNECTION Contact Reference

Closing Interlocks of 66Kv Breakers Switchyard and 11Kv Incomer Breakers SS#01

DESCRIPTION

1 52A Closing TA-1 & TA-2 OR TA-3 & TA-4 (ICA PNL S/Yd C/R) NC Aux. contactor KS300 & KS400

ref.sheet 1 of SCP pnl drawing.Before closing any one Breaker from 52A,52C &

52D, both the Xmer Breakers (52B & 52E) should be opened.It is to avoid asynchronous switching

bet. GEB & CCPP power.

2 52D Closing TA-5 & TA-6 OR TA-7 & TA-8 (ICA PNL S/Yd C/R) NC Aux. contactor KS300 & KS400

ref.sheet 2 of SCP pnl drawing.

3 52C Closing TA-113 & TA-114 OR TA-115 & TA-116 (ICA PNL S/Yd C/R) NC Aux. contactor KS300 & KS400

ref.sheet 11 of SCP pnl drawing.

4

(1) Aux. contactor K200 (Ref SCP PNL DRG.SHEET 16/1)

(2) TB2-35 & TB2-36 (SEC-D OF CRP PNL S/YD C/R) NC (2) TB 3A-35&3A-36 :52D

Relay in PNL-14 SS#01.

52B Closing

(1) TX-146 & TX-147 (SCP PNL SEC-3 CCPP C/R)

5 52E

6 GTG I/C Closing 3A-43 & 3A-44 PNL NO 10 SS#01 NC From T1-16 & T1-18.

ref.GTG Local PNL Drawing