Make BHEL
Generator type THDF 115/59
Code IEC 34/1, VDE 0530
Cooling, starter winding Directly water cooled.
Rotor winding Directly hydrogen cooled.
Main Exciter type ELR 70/90 –30/6-20 Pilot exciter type ELP 50/42 –30/16
Year of manufacture. 1996
Rating
Apparent power 588MVA
Active power 500MW
Power factor 0.85 (Lag)
Terminal voltage 21KV
Permissible variation voltage ±1.05KV Speed /frequency rpm / Hz 3000/50
Starter current 16.166kA
H2 pressure 3.5 bar
Rated field current for rated output 4040A
Rated field voltage 340A
Inner connection of starter winding YY Class & type of insulation ---
Pilot Exciter
Apparent power 65 KVA
U-X 0.001440 ohms U-0 0.002518 ohms
Stator Winding V-Y 0.001440 ohms F1-F2 0.592 ohms V-0 0.002538 ohms
W-Z 0.001440 ohms W-0 0.002529 ohms
U-V 0.00046 ohms Rotor Winding F1-F2 0.06700 ohms U-W 0.00046 ohms
V-W 0.00046 ohms
Rectifier Wheel Action Required
Number of fuses
Per rectifier wheel 30
(800 V,800 A) -
3 fuses Switch off field forcing.
Shutdown turbine-generator, replace fuses and diodes.
MECHANICAL DATA for Generator
Torques, Critical Speed etc.
Maximum short-circuit torque of stator at line –to-line single-phase short-circuit Moment of inertia of generator rotor shaft
nk1 Critical speed (calculated) ns 2 nk3
Torques and Speeds
14585 Generator Volume and Filling Quantities
Generator volume (gas volume) CO2 filling quantity**
Stator with end shields and coolers Shipping weight of stator
Stator end shield, upper part TE Stator end shield, upper part EE Stator end shield, lower part, TE Stator end shield, lower part, EE Rotor
H2 cooler section, including water channels Gas dryer
One seal oil cooler (air side) One seal oil cooler (H2 side) One primary water cooler Exciter rotor
Seal Oil System
Discharge pressure Pump motor Rating
Voltage/frequency Current
Speed Type of enclosure No.
Three Screw pump
T3S-52/54 LHSBSG2RNJIBALA
258 LPM
Discharge pressure Pump motor Rating Voltage
Current Armature Speed
Type of enclosure No.
Three screw pump
T3S – 52/54 LHSG2RNJIBALA
258 LPM
Discharge pressure Pump motor Rating
Voltage/frequency Current
Speed Type of enclosure No.
Three screw pump
T3S – 52/46 LHSG2RNJIBALA
130 LPM Kind of filter
Type
Volumetric flow rate Degree of filtration Pressure drop across filter No. for air side
No. for H2 side
Strainer-type filter 2.32.9 Ma(BOLL & KIRCH) 4.16 dm3/s
Gas System Design data Co2 flash evaporator MKG 51 AH 001
Rating Voltage
Heat transfer liquid
Volume of heat transfer liquid Hole in orifice
Relief valve on high-pressure side Relief valve on low-pressure side No.
18 kw
415 V
HYTHERM 500(HPCL)
25 dm3 2.8 mm
175 bar
8 bar
1 No., full- capacity Dublex gas dryer MKG 69
Gas dryer fan
Motor rating Voltage/frequency Speed
Type of enclosure Gas dryer absorber
wt. of absorbent material Gas dryer heater
Heater rating No.
1.1 Kw 415 V/50 Hz
2760 RPM
IP54 19 Kg each tower 3kw, 415 volts, 3 1 no., full-capacity Compressed air filter MGK 25 BT 001
Volume of activated carbon Service hours
Throughput No.
3dm3
approx. 1500 h to 2000 h 80 m3/hr at 8 bar
1 no., full-capacity
Primary Water System
Design data Primary water pumps MKF12AP001 and MKF22AP001
Kind of pump
Type of enclosure No.
Main filters MKF 52 BT 001 and MKF 52 BT 002 Kind of filter
Type
Volumetric flow rate Degree of filtration Pressure drop across filter No.
Fine filter MKF 60 BT 001 Kind of filter Type
Volumetric flow rate Pressure drop across filter No.
Ion exchanger MKF 60 BT 001 Volume
Resin
Resin volume No.
Centrifugal pump
CPK-Cm 65-250 (S) KSB MAKE 2950 RPM
70 m3/Hr 80 m
ND225 M (CGL) 37KW
415 V three-phase a.c.
50 Hz 2950 RPM TEFC
2 Nos., full-capacity
Strrainger-type filter with magnet bars 1.53.1 (Boll & Kirch)
25 dm3/s max.
150 µm
0.1 Bar with clean filter 1.2 bar with 100% fouling 2 nos., full-capacity
1 plug. 1 cartridge 1.55.1 (Boll & Kirch) 0.42 dm3/s max.
0.15 bar with clean filter 1.2 bar with 100% fouling 1 No., fuill-capacity 83 litres Lewatit
56 litres (45 kg) 1 no., full-capacity
Waste Gas System
Design data Bearing vapor exhausters MKC 31 AN 001 and
MKQ 32 AN 001 Type of enclosure Type of exhausters No. 2 nos., full-capacity
Exctation System
Design Data A-Wheel (negative polarity)
No./Type of diodes No./Type of fuses
Resistance/voltage/current per fuse No. of RC networks
60 Nos./BhdLI 220 (M/S, Edn, Bangelore make) 30 Nos./WC 9 538
Approx. 150 µΩ, 800 V, 800 A
6 Nos.
B-Wheel (Positive polarity) No./Type of diodes No./Type of fuses
Resistance/voltage/current per fuse No. of RC networks
60 Nos./BhdLI 320 (M/S, Edn, Bangelore make) 30 Nos./3NC 9 538
No. of stroboscope
LX5-30/36-2
240 V
50/60 Hz
1 No.
Exciter air dryer Type Rating Voltage Frequency
Adsorption air flow rate Regeneration air flow rate No. of dryer
Cooler data of Generator
Design data for the H2 Cooler,
Units Materials and Pressures
Hydrogen pressure 3.5 Bar
Gas flow 33 M3/s
Heat dissipating capacity 4640 Kw Cold gas temperature 44 °c Hot gas temperature (max.) 72 °c Gas pressure drop (approx.) 700 Pa Cooling water flow (total for 4 sections) 540 m3/hr Cooling water inlet temperature (design) 38 °c Water outlet temperature 45.4 °c Water pressure drop 3.0 Mwc
Materials
Fins Copper
Tubes 90/10 Cu-Ni Tubesheets C-Steel
Water channels C-Steel with Protective coating Pressures (Tube side)
Design pressure 10kg/cm2 Test pressure 15kg/cm2
Design Data for One Seal Oil Cooler
(Air side) Units Materials and Pressures
Oil flow 4.16 dm3/s
Heat dissipating capacity 140 kw Oil inlet temperature 70 °c
Oil outlet temperature 50 °c Oil pressure drop (approx.) 0.833 Bar Cooling water flow 35 m3/hr Cooling water inlet temperature (design) 38 °c Water outlet temperature 41.4 °c Water pressure drop (approx.) 6.8 Mwc
Materials
Tubes Admiralty Brass Tubesheets C-Steel Water channels C-Steel with
Protective coating Cooling Water Side Pressures
Perm. Operating press. 16kg/cm2 Test pressure 24kg/cm2 Oil Side Pressures
Perm. Operating press. 16kg/cm2 Test pressure 24kg/cm2
Design Data for One Seal Oil Cooler
(H2 side) Units Materials and Pressures
Oil flow 2.47 dm3/s
Heat dissipating capacity 90 kw Oil inlet temperature 70 °c
Oil outlet temperature 50 °c Oil pressure drop (approx.) 0.85 Bar Cooling water flow 22 m3/hr Cooling water inlet temperature (design) 38 °c Water outlet temperature 41.5 °c
Water pressure drop (approx.)8 7.1 Mwc Materials
Tubes Admiralty Brass Tubesheets C-Steel Water channels C-Steel with
Protective coating Cooling Water Side Pressures
Design press 16kg/cm2 Test pressure 24kg/cm2. Oil Side Pressures
Design press. 16kg/cm2 Test pressure 24kg/cm2
Design Data for the Primary water
cooler, (2 Sections) Units Materials and Pressures Primary water flow 18.06 dm3/s
Heat dissipating capacity 2082 kw Primary water inlet temperature 75 °c Primary water outlet temperature 48 °c Primary water pressure drop 840 Mbar Cooling water flow 500 mVhr Maximum cooling water inlet temperature 38 °c Cooling water outlet temperature 41.6 °c Cooling water pressure drop* 3.5 mwc
Materials
Shell SS
Tubes SS
Tubesheets SS Water channels C-Steel with
protective coating Primary Water Side Pressures Design press. 10kg/cm3 Test pressure 15kg/cm2 Cooling Water Side Pressure Cooling press. 10kg/cm2 Test pressure 15kg/cm2 Primary Water Specification
Conductivity < 10 µmho/cm (preferably 0.5 µmho/cm)
PH 6-8
Dissolved O2 Minimum , preferably less than 100ppb Dissolved CO2 Minimum , permissible conductivity
Chlorides after a strongly acidity cation exchanger Other anions < 0.2µmho/cm
Ammonia Minimum ,test with Nessler’s solution as a regent shall not cause a change in color Cu, dissolved/ undissolved Less than 20 ppb
Fe, dissolved / Undissolved Less than 20ppb
Dissolved solids The water shall not contain chemicals from treatment process , such as hydrazine, morphine, levoxine, phosphate, etc.
Specification for ion Exchange resins
Cation exchanger
( Lewatit S100KR/H/chloride-free) Anion exchanger
(Lewatit M500 KR/OH/chloride-free)
Functional group Strongly acidic Very strongly basic
Grain shape Beads Beads
Particle size (0.3-125)mm 0.3-1.25)mm Bulk density of swollen resin (800-900)g/dm3 (670-750)g/dm3
Resin form H-ions OH-ions
Specific load up to 40 dm3/h X dm3 40 dm3/h Xdm3 Total capacity of swollen
resin
(1.9-2.2)mol/dm3 (1.1-1.6) mol/Dm3 Useful capacity min 50 gCaO/dm3 16 gCaO/dm3 Chloride content up to 50 mg/dm3 50 mg/dm3
Thermal stability up to 120 °C 70 °C
Stability in PH range Unlimited Unlimited Shelf life min.
(in original packing at temperatures of 1°C to + 400
°C
5years 3years
SPECIFICATION OF GENERATOR TRANSFORMER