Working parameters Specifications Operation Parameters Alarms and actions Oil pumps and lines Regulators and Valves Ejectors

1. BTH
BRITISH THOMSON
HOUSTON TURBINE

2. WORKING PARAMETERS AND ALARM
TURBINES

3. SPECIFICATIONS
DESCRIPTION BTH T-G
Type Pure impulse Pure impulse
RPM (turbine) 3000 8000
RPM (alternater) 3000 1500
Coupling Directly coupled Coupled through gear
box
Capacity 6.25 MW ( 6.6 KV ) 18 MW ( 11 KV )
No of extractions 1st= 7 kg/cm2 1st = 9.5 kg/cm2
TWO 2nd = 2.8 kg/cm2 2nd = 3 kg/cm2
No of stages 12 HP=4 MP=3
9 HP=5 MP=1 LP=3
LP=5
Type of governing Nozzle control Nozzle control
Type of governor Centrifugal Electronic
No of valves HP=6 MP=8 LP=5 HP=5 MP=4 LP=4
Type of bearing Journal Tilting pad
Turbine throttle valve Operated by oil pr Operated by oil pr when
when pr breaks v/v pr breaks v/v gets shut,
gets shut, can be can be operated
operated manually manually also
also

4. SPECIFICATIONS
DESCRIPTION BTH T-G
Tripping Manual & Manual , mech & elec
mechanical over overspend & due to
speed various parameters
Oil pump Gear pump driven Gear pump driven from
from shaft , gear shaft, steam driven ,
pump driven from centrifugal pump elect
steam , gear pump driven
elect driven
Hot well control manual auto
Start up ejector Present but remains Present can be started
blind after turbine any time
operation
No of ejectors 1 primary 2 primary
1 secondary 2 secondary
Gland sealing steam Given from extnl Given form 3 kg/cm2
source 46 kg/cm2 line before starting
line before starting turbine
turbine
Gland steam is is exhausted to the Condense in gland
exhausted to the atm atm vacuum condenser
Critical speed 2170 rpm 1900 and 4800 rpm

5. SPECIFICATIONS
AOP to be shut at 6700 rpm
Ejector steam pr 44 kg/cm2 44 kg/cm2
Coolant for ejector Condensate Condensate
steam & vapor
Gland steam source 44 kg/cm2 line 3 kg/cm2 line from 2nd
extraction
Speed increase mech Manually by Electronically from
during starting operating lever control room
Extraction control One is set point & One is set point & other
mechanism other is extraction pr is controller. Both are
controller both are dial type & electronically
mech devices controlled
BTH SPECIFICATIONS AC GENERATOR
TYPE:ABL CC 18
STANDARD: 3SS 2613/57
RATING : 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

6. BTH OPERATING PARAMETRES SEPT 07
Sr Parameter OV unit alarm Sr Parameter OV unit alar
no no m
1 Thrust clearance ,inch 1.069 T 22 Cond extr pump amps 7.5 Amp
2 Vacuum, cms 67 Cms 23 1ST stage extr pressure 7.5 k/c2
3 Steam pr 42 k/c2 24 2ND stage extr pressure 2.7 k/c2
4 Steam temp 395 0c 25 Main steam flow T/HR 52 Tph
5 HP oil pr. 5 k/c2 26 1st Extr flow Tph
6 LP oil pr. .8 k/c2 27 2ND Extr flow 32.5 Tph
7 Ambient temp 37 0c 28 Condensate flow 10.5 Tph
8 Oil cooler oil inlet 42 0c 29 Load MW 5 MW
9 Oil cooler oil outlet 35 0c 30 Vanes opening HP 4.5 nos
10 Oil cooler water inlet 32.8 0c 31 Vanes opening IP 6.5 nos
11 Oil cooler water outlet 33.3 0c 32 Vanes opening LP 1.5 nos
12 Bearing temp Thrust 43 0c 33 1st Extr steam temp 220 0c
13 Bearing 1 – 6 temp 45-50 0c 34 2ND Extr steam temp 216 0c
14 Gland steam pr HP AND LP 0.01 k/c2 35 Air cooler inlet 23 0c
15 Air ejector vacuum 1st stage 65 Cms 36 Air cooler out let 24 0c
16 Air ejector vacuum 2nd stage 63 Cms 37 Condensate temp ejector 46/56 0c
17 Circulation pump motor current 104 Amp 38 Vapor temp inlet to ejector 46 0c
18 Circulation pump pressure 0.15.8 k/c2 39 Air inlet to cooler 40 0c
19 Circulation water inlet temp 33.2 0c 40 Air outlet cooler 56 0c
20 Circulation water outlet temp 37.9 0c 41 LHS steam temp inlet to cond 50 0c
21 Cond extr. Pump pressure 1.6 k/c2 42 RHS steam temp inlet to cond 48 0c

7. BTH ALARMS AND ACTIONS (OVER SPEED TRIP : 3250 RPM)
Sr. Parameter Normal Alarm and action
No value
1 Bearing oil temp. high Min 36, (43-65) max 76 oc
max 50
2 Oil pressure low 0.8 0.5 to 0.3 Trip the
kg/cm2 turbine
3 Oil temperature high Below 43 43 d.cel. Cooling water
and not flow from cooler
less than
39
4 Main steam temp low 39 to 42 Min 36 kg/cm2.Reduce
kg/cm2 pr. 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

8. BTH OIL PUMPS AND LINES
To pilot vv & sm drains TV Return from bearings
0.8 KG
Bearings
Oil base tank
Disch from
5 KG GOV. Steam pump
EORV 3/7 kg
valves MOP
SUC SP
return
OC
D NRV
OVERFLOW
OC
PURIFI
Oil settling RE
tank
AOP

9. LINKAGES REGULATORS AND PILOT VALVES
5 3 1 2 4 6 HP
SE
2 ND I ST MAIN
QU
5 3 7 1 2 8 4 6 MP
EN
CE
3 5 1 4 2
LP
P
HP
G
R
Set point 2 nd extr
P
1ST R
Set point 1 st extr

10. 2 nd ext 1 st ext C Head end BTH GEAR VALVES AND
PILOT VALVES
ARRANGEMENT
O
C
O
SV SG
TC
ETG
HP IP
LP IP
TV TV

11. EJECTOR BTH
46 Steam
T
NC
VENT
TO
R Y
I MA
PR
Y
D AR
O N
SEC TO CO
NDEN
SER
condensate
condense
vapor
condense steam
STEAM ejector

12. 1ST
2ND
CONDENSER
OTHER DRAINS
M
M
HP GLAND
STEAM
HP
DRAIN CHEST
BLOW DOWN
46 STEAM
HP SIDE GLAND LEAK
DRAIN LP
IP SIDE GLAND LEAK
LP
TO ST TRAP
LP SIDE GLAND LEAK
HP / LP GLAND SEALING AND DRAINS
LP GLAND
COND
TO CONDENSER

13. BTH FEEDERS (Total Amps – 480 load : 4.85 MW)
Feeder Service
6250 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 PM 1 + 55 / 150 hp pump house 50 A
5 bamboo
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