BTHBRITISH THOMSON HOUSTON TURBINE

WORKING PARAMETERS AND ALARM

TURBINES

Coupled through gear box

Directly coupledCoupling

15003000RPM (alternater)

80003000 RPM (turbine)

Pure impulsePure impulseType

T-G BTH DESCRIPTION

HP=5 MP=4 LP=4HP=6 MP=8 LP=5No of valves

ElectronicCentrifugal Type of governor

Nozzle controlType of governing Nozzle control

12 HP=4 MP=3LP=5

No of stages

1st = 9.5 kg/cm2 2nd = 3 kg/cm2

1st= 7 kg/cm2 2nd = 2.8 kg/cm2

No of extractionsTWO

18 MW ( 11 KV ) 6.25 MW ( 6.6 KV )Capacity

Tilting padJournalType of bearing

Operated by oil pr when pr breaks v/v gets shut, can be operated manually also

Operated by oil pr when pr breaks v/v gets shut, can be operated manually also

Turbine throttle valve

SPECIFICATIONS

9 HP=5 MP=1 LP=3

DESCRIPTION BTH T-G

Tripping Manual & mechanical over speed

Manual , mech & elec overspend & due to various parameters

Oil pump Gear pump driven from shaft , gear pump driven from steam , gear pump elect driven

Gear pump driven from shaft, steam driven , centrifugal pump elect driven

Hot well control manual auto

Start up ejector Present but remains blind after turbine operation

Present can be started any time

No of ejectors 1 primary1 secondary

2 primary2 secondary

Gland sealing steam Given from extnl source 46 kg/cm2 line before starting turbine

Given form 3 kg/cm2 line before starting turbine

Gland steam is exhausted to the atm

is exhausted to the atm

Condense in gland vacuum condenser

Critical speed 2170 rpm 1900 and 4800 rpm

SPECIFICATIONS

AOP to be shut at 6700 rpm

Ejector steam pr 44 kg/cm2 44 kg/cm2

Coolant for ejector steam & vapor

Condensate Condensate

Gland steam source 44 kg/cm2 line 3 kg/cm2 line from 2nd extraction

Speed increase mech during starting

Manually by operating lever

Electronically from control room

Extraction control mechanism

One is set point & other is extraction pr controller both are mech devices

One is set point & other is controller. Both are dial type & electronically controlled

SPECIFICATIONS

AC GENERATORTYPE:ABL CC 18

STANDARD: 3SS 2613/57RATING : 7812.5 KVA

CMR:6600 V, 685.1 AMPS

PF :0.8 , 3 PH ,50 HZ, 3000 RPM

EXITATION AT RATED OUTPUT:110 V , 269 AMPS , CLASS B

BTH SPECIFICATIONS

BTH OPERATING PARAMETRES SEPT 07Sr no

Parameter O V unit alarm

1 Thrust clearance ,inch 1.069 T

2 Vacuum, cms 67 Cms

3 Steam pr 42 k/c2

4 Steam temp 395 0c

5 HP oil pr. 5 k/c2

6 LP oil pr. .8 k/c2

7 Ambient temp 37 0c

8 Oil cooler oil inlet 42 0c

9 Oil cooler oil outlet 35 0c

10 Oil cooler water inlet 32.8 0c

11 Oil cooler water outlet 33.3 0c

12 Bearing temp Thrust 43 0c

13 Bearing 1 – 6 temp 45-50 0c

14 Gland steam pr HP AND LP 0.01 k/c2

15 Air ejector vacuum 1st stage 65 Cms

16 Air ejector vacuum 2nd stage 63 Cms

17 Circulation pump motor current 104 Amp

18 Circulation pump pressure 0.15.8 k/c2

19 Circulation water inlet temp 33.2 0c

20 Circulation water outlet temp 37.9 0c

21 Cond extr. Pump pressure 1.6 k/c2

Sr no

Parameter O V unit alarm

22 Cond extr pump amps 7.5 Amp

23 1ST stage extr pressure 7.5 k/c2

24 2ND stage extr pressure 2.7 k/c2

25 Main steam flow T/HR 52 Tph

26 1st Extr flow Tph

27 2ND Extr flow 32.5 Tph

28 Condensate flow 10.5 Tph

29 Load MW 5 MW

30 Vanes opening HP 4.5 nos

31 Vanes opening IP 6.5 nos

32 Vanes opening LP 1.5 nos

33 1st Extr steam temp 220 0c

34 2ND Extr steam temp 216 0c

35 Air cooler inlet 23 0c

36 Air cooler out let 24 0c

37 Condensate temp ejector 46/56 0c

38 Vapor temp inlet to ejector 46 0c

39 Air inlet to cooler 40 0c

40 Air outlet cooler 56 0c

41 LHS steam temp inlet to cond 50 0c

42 RHS steam temp inlet to cond 48 0c

BTH ALARMS AND ACTIONS (OVER SPEED TRIP : 3250 RPM)

Sr. No

Parameter Normal value

Alarm and action

1 Bearing oil temp. high Min 36, max 50

(43-65) max 76 oc

2 Oil pressure low 0.8 kg/cm2

0.5 to 0.3 Trip the turbine

3 Oil temperature high Below 43 and not less than 39

43 d.cel. Cooling water flow from cooler

4 Main steam temp low 39 to 42 kg/cm2 pr.

Min 36 kg/cm2.Reduce ext set point (365 0c)

5 Main steam temp high 46 kg/cm2 420 0c

6 Vacuum low 65 cm hg 52 cm . Condenser hot well level (20 “ of hg)

7 Alternator water inlet high Air cooler water flow

BTH OIL PUMPS AND LINES

D NRV

Disch from Steam pump

MOP

AOP

OC

OC

5 KG GOV.

OV

ER

FLO

W

SUC SP

0.8 KG Bearings

Return from bearings

3/7 kg valves

PURIFIRE

return

To pilot vv & sm drains

Oil base tank

Oil settling tank

EORV

TV

G

P1ST

P

MAINI ST2 ND

Set point 1 st extr

Set point 2 nd extr

R

R

HP

LINKAGES REGULATORS AND PILOT VALVES

5 3 1 2 4 6

5 3 7 1 2 8

3 5 1 4

4 6

2

HP

MP

LP

SE

QU

EN

C

E

HP IP

TV TV

LP IP

O

C

OC

S G

ETG

S V T C

2 nd ext Head end1 st ext BTH GEAR VALVES ANDPILOT VALVES ARRANGEMENT

PRIMARY

SECONDARY

46 Steam

condensate

vapor

steam

ejector

condense

condense

EJECTOR BTH

TO NCT

STEAM

VENT

TO CONDENSER

HP

GL

AN

D

LP

GL

AN

D

TO CONDENSER

HP LP

DR

AIN

CH

ES

T

DR

AIN

LP

46

ST

EA

M

ST

EA

M

HP SIDE GLAND LEAK

IP S

IDE

GL

AN

D L

EA

K

LP

SID

E G

LAN

D L

EA

K

BLO

W D

OW

N

M1ST

M2ND

CONDENSER

HP / LP GLAND SEALING AND DRAINS

COND

OTHER DRAINST

O S

T T

RA

P

BTH FEEDERS (Total Amps – 480 load : 4.85 MW)

Feeder Service6250 kw T A Exciter panel (235 A / 95 V)

6250 kw Main incomer (485 A / 6500 V / 0.83 PF / 4.85 MW)

1 Machine drive motor PM 4 Main Motor drive 35 A

2 Machine house PM 4 Rollers 85 A

3 Stock preparation plant PM 4 75 A

4 bagass

5 bamboo

PM 1 + 55 / 150 hp pump house 50 A

Old pulp mill + lime klin + pump house 25 A

6 Boiler no 7 plant + TG control room +Colony Lighting 65 A

7 S/R plant + Dorr plant + TW 3,4,7,8,9,16 95 A

8 MV section 50 A