Dadri stage 1 Light Up/Turbine rolling checklist/Steps

 

Unit start up Checklist
1	IOM sent to CISF
2	Two ECW Pumps i/s
3	Written clearance from: PP,RM.C&I,TM,AHM,EM
4	Check Air, FG Pass dampers
5	2 Pass of ESP opened, All ACP i/s, Fields ready to be taken into service
6	BT 50%
7	IA, SA PR Adequate
8	Aux PRDS charged from station
9	LDO stations and AB, CD guns Normalised
10	APH Soot blowing started with SB 26
11	Mills ABCD normal
12	MS 1,2 Supply Normalised
13	FA, BA evacuation system ready, AHP Clearance
14	SH drains Manual Opened
15	SH Manual vents, SH start up vents & drum vents Open
16	MS lines drains u/s of HPBP @8.5m open
17	Open Eco R/c E20
18	open CBD manual valves
19	MS 203,204, HRH 203,204 CRH 203,204 open with manuals
20	MS, HRH strainer drain to IBD MS 103/104, HRH 103,104 open
21	MS, BD,SS,FW,HRH sampling line OK
22	start CEP
23	start BFP in r/c, wait for Chemistry clearance
24	Take FRS 30%line and fill drum upto +50 mm
25	Start APH, Scanner fan, ID fan, Fd fan put draft in auto, purge boiler
26	Pull Vacuum
27	Take AB13or AB24 and light up the Boiler
28	After 30 minutes, Take other pair of AB
29	Charge MOT cooler, LOTCV in auto with 45 Deg SP
30	Check for TG Lub Oil filter
31	Turbine SVs gagged removed
32	Governing rack Normal, EHC Normal
33	EHTC mimic: Speed SP<Turning speed,EHTC o/p:10%, Load controller ON
34	All MAL dranis And MS/CRH/HRH drains to HPFT open
35	Close Drum vents, SH Vents@2ksc
36	CBD open
37	Charge MS line @ 8ksc Drum Pr
38	Charge HP, LP Bypass @ 10 lsc, close MS line drains u/s of HPBP
39	close start up vents after HPLP Bypas charging
40	EHTC mimic: Load ref 20MW,PRmax 50 MW
41	Check X1, X2, X3 Before ESV opening
42	Reset turbine by lower SD to 0%, Reset GRP
43	Rolling: TG>>turbine all SGC>>turbine Seq>>Program ON>>startup
44	Advance upto 101 to 105 for SD to reach 42% i.e. ESV opening
44	For 540 rpm, check X4, X5, the advance upto 112 step, Then wait
45	start PA Fans, Charge SW, SO, H2 Gas Cooler @ 540 rpm
46	check Barring gear close@240rpm, JOP @ 540 rpm
47	Inform S/Y to close Isolator
48	For 3000 rp, X6 fulfills.
49	From Program , advance upto 116 step, Program OFF
50	DAVR: DAVR Reset, Close FCB, Excitation ON, make 16KV Gn TV
51	Then Sel GCB form OWS, and selction: ATRS from ECP, EHTC: Synchroniser ON
52	Open Speed Ref Pop-up for loading , As Unit sync, Load Turbine, Prmax:225 MW
53	close HP Bypass , the LP Bypass to avoid HP/IP Trim
54	check for GT Fans
55	take Mill A
56	close MS 101,102,103,104, HRH 1010,102,103,104
57	Put SLC Drains ON
58	@20% Load : Charge D/A, LPHs
59	@40% load: charge HPHs, Change over ST to UT
60	Take Mills B, C@ 30% and 40% load
61	Changeover FRS 30% to 100% @ 40% Load
62	Take Additional mill D, and withdraw oil support
63	Put Machine in CMC
64	Close E20 v/v
64	charge ESP Fields, and Normalise all Passes

Dadri stage 1 Important Drives Rating/Protections

 

MILL	1	SA Hdr PR <127mmWC for TD 1 Sec
	2	PA Hdr<500, FEDCBA trip with TD 15 sec
	3	Feeder capacity 49 tph
	4	Full Load current: 54.7 A
	5	O/L Current: 65.25 A with TD 6 Sec
PA Fan	1	LO Pr 0.4 ksc: 0.9 ksc(standby starts)
	2	HC Oil Pr: 0.8 ksc; 0.6 ksc(standby starts)
	3	Brg Temp: 90 Deg
	4	HC/ Return Oil Temp: 110/120
	5	Vibration: 9mm/sec
	6	F/L Current/ O/L Current: 113.5/130.5 A
FD Fan	1	LO Pr 0.5 ksc: 0.9 ksc(standby starts)
	2	Brg Temp: 100 Deg
	3	Vibration: 9mm/sec
	4	F/ L Current/ OL Current: 108/116.5 A
	5	Control Oil Pr: 8 ksc (standby starts)
ID Fan	1	LO Pr 0.7 ksc: 0.9 ksc(standby starts)
	2	Brg Temp: 90 Deg
	3	Vibration: 9mm/sec
	4	F/L Current: 157.8 A
	5	O/L Current: 191.88 A
Misc Prot	1	Furnace: +150/-180
	2	Drum: +225(TD 10 sec)/-225(TD 5sec)
	3	Vacuum : -0.7 ksc/515 mmHG
	4	Vac p/p: Autostart -0.85 ksc/630 mmHG
	5	LO Pr:1.88 ksc
	6	Fire Protetion.1/2: -50, -100
BFP	1	LO Pr: 0.5ksc/0.8ksc(AOP starts)
	2	D/A Level: <700 mm
	3	Brg & HC Temp: 95 Deg
	4	WO Temp: 130 Deg
	5	Suction Pr: <1.7 ksc
	6	Full Load Current: 356.5 A
	7	O/L current: 399.28 A

Dadri stage 1 High energy drains

 

DADRI - COAL
High Energy Drain Valve Passing
[ STAGE - I ]
	Date	31.08.2025
S. No	Details of Passing Valve & Tag No	Unit-1
1	MAL-11(UPSTREAM OF HP TURBINE CONTROL VALVE)
2	Mal-26(UPSTREAM OF IP TURBINE CONTROL VALVE)
3	MAL-15(DN STREAM OF HP TURBINE CONTROL VALVE)
4	MAL-16(DN STREAM OF HP TURBINE CONTROL VALVE)
5	MAL-22(HP TURBINE CASING DRAIN VALVE)
6	MAL-31(DN STREAM OFIP TURBINE CONTROL VALVE)
7	MAL-32(DN STREAM OF IP TURBINE CONTROL VALVE)
8	MAL-65(CRH NRV UP STREAM)
9	MAL-66(CRH NRV UP STREAM)
10	MAL-12(UPSTREAM OF HP TURBINE CONTROL VALVE)
11	MAL-27(UPSTREAM OF IP TURBINE CONTROL VALVE)
12	MAL-47(HPH-5 EXTRACTION NRV UP STREAM)
13	MAL-51(DA EXTRACTION NRV UP STREAM)
14	MAL-54(LPH-3 EXTRACTION NRV UP STREAM)
15	MAL-81(DRAIN FROM GLAND SEAL STEAM HEATER)
16	MAL-55(LPH-2 EXTRACTION NRV UP STREAM)
17	HRH-101(HRH LINE STRAINER DRAIN HP DRAIN FLASH BOX)
18	HRH-102(HRH LINE STRAINER DRAIN TO HP DRAIN FLASH BOX)
19	HRH-103(HRH LINE STRAINER DRAIN TO IBD TANK)
20	HRH-104(HRH LINE STRAINER DRAIN TO IBD TANK)
21	HRH-105 (LP BYPASS WARM UP LINE)
22	HRH-106(LP BYPASS WARM UP LINE)
23	MS-101(MS LINE STRAINER DRAIN HP DRAIN FLASH BOX)
24	MS-102(MS LINE STRAINER DRAIN HP DRAIN FLASH BOX)
25	MS-103(MS LINE STRAINER DRAIN TO IBD TANK)
26	MS-104(MS LINE STRAINER DRAIN TO IBD TANK)
27	CRH-101 (CRH LINE NRV DRAIN)
28	CRH-102 (CRH LINE NRV DRAIN)
29	BFP-1A
30	BFP-1B
31	BFP-1C