‘This manual contains information on the operation and maintenance of steam turbine. ‘The information has been prepared with the assumption that the O&M personnel have basic knowledge of power plant engineering and operation. It is an essential prerequisite for satisfactory operation ‘and maintenance of the steam turbine that the operating ‘and maintenance personnel are fully familiar with the design of the steam turbine plant and receive thorough training in operating and maintaining the unit. Extensive operation beyond rated design values will ‘eventually result in increased maintenance expenses or a ‘corresponding reduction in the useful life of the steam turbine. Bharat Heavy Electricals Limited cannot be ‘responsible for any malfunction occurring as a result of ‘operation beyond rated limits and such operation, if undertaken by utiities, must be at their own risk. The part numbers of components, indicated in the Description section of the manual should not be used for ‘ordering spare parts. Please refer the chapter on Ordering of spares for that purpose. Effort has been made to include adequate information in this manual. For any further information or clarification please contact: Field Engineering Services, Steam Turbine Engineering, BHEL, Hardwar- 249403, (Uttarakhend) India. .0-0001-03Ooe Steam Turbine Contents rJ/[/ Description Subject ‘Document No Subject ‘Document No ‘GENERAL = | Journal Bearing IP Rear 6.1-0345-0172 Preface SOOOOTOGA | [w | Casing Supports And Guides | 6.1-0350-01/2 Contents 6.0-0002.09/3 LP Turbine DESCRIPTION = [Casing ERBRIOIT Brief Description = | Amospheric Reliet 6.1-1320.001 1 | Sectional Arrangernent 6.1-0001-0471 Diaphragm ‘= [ General Description 6.1-0002.042 | | | Blading, Dum Stages SBOO = | Fed Points 6.1:0003-022 | |= | Blading, LP Stages B.te1a40-0171 | Technical Data = | Shaft Seats 11050004 = [Constructon, Speed & eraroo.033 | | = | Resr Bearing Pedestal 6.1-1360.02f Steam Pressure = | Journal Bearing 6.1-1970-042 = [ Steam And Casing EOL: Turning Gear Temperatures | Hydraulic Turning Gear 10510-07 © [Bearing Metal Temperatures, | 6.070203 | | «| Manval Barring Gear 5.0520-01/1 Vibration, Weights | Hyéiaule Jacking Device | 6 1-0530-032 ‘Oi Supply, OF PuRS Soa Control System Control Fd System And 61-0104.052 ] |= | General Description 6.10800.017 ‘Control Fluid Pumps. 1 | Start-Up Procedure 6.1-0610.0102 = [Limit Curves: HP Stop & aoa | [= | Speed Conirl 6.1-0620-01/2 Control Valve Casing = | Elctical Speed Measuring | 61-0621-02/1 = | Limit Curves: HP Casing ‘B.LOU-01 12 | Protective Devices, '§.1-0630-0172 | Limit Curves: HP Shaft 112.012 | | | Over Speed Trip Test 6.1-0631-001 «= | Limit Curves: IP Shaft 6.1-0113-01/1 = | Testing Of Stop Valves 8.1-0632-01/1 = [Steam Pury Valves eLoueoT = [ LP Byoass System (General) | 6,1-0640-01/1 = [Ot Specitcaton Standard —Te-o1g0-082 | [= | Extraction Check Valve 6.1-0650-01/t | Fire Resistant Fug (FRF)For | 6.1-0140-04/2 | | * | Swing Check Valve (CRH) | 6.1-066%-017 “Turbine Control System 1 [ Testing Of Check Valves in| 6 1.0852.01 HP Turbine Gold Reheat Line = | Valve Arangement arama | [= [Automatic Turbine Tester | 6.0660-007 = [Casing fesozioova | [ [General = | Bing Togzo-gzi | [H[Avtomate Turbine Tester | 6.1-0659-0007 a [ Shef Seals And Balance | 6.1.0230.01/2 For Protective Devies Piston 1 [Automate Turbine Tester | S1.0662018 Front Bearing Pedestal PRECIO ‘Stop And Control Valves Rear Bearing Pedestal 6.1-0250-02/2 HP Actuator 6.1-0665-007 Combined Journal And Thrust_| 6.1-0260-012 Electro Hydraulic Seal Steam_| 6,1-0670-01/4 Bearing Pressure Control ‘= [Journal Bearing. HP Front | 6.027002 Governing Scheme {0680-0011 [Casing Supports And Guides | 6 .0280-012 Control System Diagram | 6.1-0681-0215 TP Turbine Legend = [casing samira | [= | Lubrication Ghar 73650-028 = | Blading 6.1-0520-02/1 ‘Control System Parts = | Shaft Seals 6.1-0330-012 | [| Hydraulic speed govemor with_| 6.1-0710-002 = | Rear Bearing Pedestal 6.1-0540-02/1 starting and load iting device BHEL, Hardwar 6.0-0002-03/1Subject Document No Subject ‘Document No = | Adjusting Gear 8.1.0720.001 | | w | Solenoid Valve For Temperature | 6.1.0950-0001 = | Electto Hydraulic Converter | 6.1-0730-03/3 ‘Controlled Intarock For Turbine Control System | Vacuum Breaker 960.002 1 | Rydraulic Ampifier For .1.0740-023 | [m | Changeover Valve For 6.1-0960-00/1 “Turbine Control System ‘Testing Device Damping Devico SLs ‘Olt Supply 1 | Electical Speed Pick Up eorec-011 | [a] Oi Supply System 6.1-1000-0504 Pressure Converter 6.10761-0011 | [| OilVapor Extraction Systom | 6.1-1001.03/2 ‘Steam valves and = | Ol Discharge & Vent System | 6.1-1002.03/2 ‘accessories ‘= | 01 Purtfcaton System 6.1-1003-05/1 | Combined Main Stop And 64.0810-012 | [m | Main OF Tank 8.1-1010-01/2 Control Valve ‘= | Main OF Pump With Hydraule | 6.1-1020-04 i | Servometor For Main & ERECTEECI ‘Speed Transmiter Reheat Stoo Valves = | Aviary O1 Pump eeaooT 7 | Hydraulic Servomater For 6.0812-002 | | m | DC Emergency Oil Pump 6.1-1040-01/1 Main & Reheat Control Valves = | Jacking OF Pump 8.1-1050-00/2 i [Test Valve For Emergency | 61-0873-00% | fw [Or Throttle 6.1-1080-00/1 ‘Stop Valve = | Oil Throte .1-1081-00/1 1» | Combined Rebeat Stop & 6.1-0814-00) = | Three Way Control Valve For | 6.1-1080.01/1 ‘Control Valves {Lubricating Of Temp. Control i= | Hangers For Reheat Stop & | 61-0815-0171 ‘Control Fluid Supply ‘Control Valves HP Control Fluid Pump With = | Steam Strainer 60816-0071 LP Extraction = | Changeover Valve Far 6.1.0840-00/1 | [= | Plate-Type Fifer Bleeder Check Valve = | Duplex Filter For Plot Control i | Aviary Valve Of Extraction | 6.1-0841-002 ‘OF Control Valves Check Valve i | Regenerating Plant i | Rotary Vane Actuator For cies Other Systems Reheat Swing Check Valve = | Drain System (MAL) i [ Pict Vatve For Rotary Vane | 6.1-0854-0011 | [w | System Diagram index ‘Actuator Of Swing Check Valve '= | Component Diagram Index '= | Auxiliary Pilot Valve For E0855-007 | [w | Shalt Seal System Rotary Vane Actuator OF ‘Operation Reheat Swing Check Valve ™ | ntreduction 62.0001-071 "= [ Gland Steam Control Vave | 6.1-0860-00/ | | m | Specification OF Stoam, O18 | 6.2-0002.00/1 = | Leakage Steam Control Valve | 6.1-0870-02/t Control Fluid Protective Devices = | Testing OF Turing 6.2.0020-0071 i= | Main Trp Valve 6.1.0810-0071 Components - General = | Emergency Trip Valve For .1.0911-001 | [a | Turbine Systems Testing ‘anual Trip Out ~ [esting Intervals 1 | Solenoid Vaive For Remote | 6.1-0012-001 | [| Controliers S201 Trip Out | Automatic Turbine Tester 6.2.0022-0111 1 | Over Speed Tip 51-0520-0071_| [5 | Automatic Turbine Tester 6.2-0023-01/1 = | Over Speed Trip Releasing | 6.10921-00/1 | [5 | Protective Devices 6.2.0024-01/1 Device | Safety Devices 6.2.0025-01/1 ‘Over Speed Trip Test Device | 6.1.0022-002 | | TValves 6.2.0026-01/1 Low Vacuum Trip .1-0995-001 | || wonitoring Devices 2-0027-0111 Condenser Safety Device $.1-0840-00/'1 5 | Operating Parameters: 6.2-0028-01/1 BHEL, Hardwar 6.0-0002-03/2‘Subject Document No Subject osument No Startup = | Oi System 6 2.0460-005 = | Staring The Tutine ano = [ Control uid System 2.0870-008 [Startup & Shutdown $2-0111-004 = [ Gland Steam System 2.0490-00/1 Diagrams, Symbol = [ Bypass System .2.0490-00/3 = | Statup Diagram | MAINTENANCE | General e201 Tnedueton 3.00000 © | Preparation For Siatup | 62:0119.0011 inspection Schedule 6.3.0010-08/3 | Operating Postion OF | 6.2:0120-00/1 ainienance Schedule Wanualy Operated Valves Turbine FEEUVAEOI [Ol System & Turing Gear_| S2-0Ts.0205 ‘Oi System, Seal Steam | 65:0022.016 | Control Fuid System .2.0135-0214 Sysen. brane ‘Start Up Diagram | FRF System cma @ | Condensing Plant TAO | — fw | Testing During StartUp | 6.0090-0207 © | Bypass System 62.0150-00 | | w | Testing During Power 6.3-0095-0215 3} Wam-Up& Startup Of 62.0160-02/8 cae Turbine z =e acme legroom] |= enter Aste Ot [SaaS | eel ae B2.0160-004 = | Remedial Actions For OFF | 63:0040-016 od Ret Normal Operating Conditions w [Load operation, inveducion | 620200 _[Romal Onecaica Conere": Samm aa = [ Synchronization andoading | 6.2.0210-00/5 paar i [ Power operation, convoters | 6.2.0220-009 = [ Testing Duting Shut Down + [aston preva! Seiieres| || Tesen buna item watorbi teatae + [Tesing OF Say Vas trou es | Testing OF Signaling Doviess uc = [ Testing OF TSC. = [voducton 2 cs 20300-0011 | TST steam Wasting OF Turbine = | Shutdown Diagram | Turine O¥ Care 2 | General SII 2 Se comma [eens | [+ | SeseAnd Or ubreten 2 | Condensing Pant 20090-0072 | 51 Determination OFFRFP [Oi System 6,2.0540-0112 SS oe | Fast Cooing Down Of | 6.2.0350-01/1 raton Dampers Turbine = | Insirucions For Overhaul = Preventng Corosionin | Sz0950-00%] |= | Turbine Restart Afer Boler idle Turbine Repais Fat Tracing -| Fe utine Restart Ar Msoe = [awodueion 70400-0001 inspections Or Repais = [ Serious Feuis 6 2.0410-00 = [Environmental Protection | $3:0250:007 @ [Vibration €2.0420005 | [0 | Fuotelastomer Products 00 = | Bearing Temperature | €2:0421-00/1 Safety Note = [ casing Tomperanwes | 62-0422022 | | | Sale Disposal Of Turbine OF + [Tobine Stess Gonvorer | 62-04a0.0u | [= | Ordering OF Spares Measures To Avol Impernisibe Operaion Stop & Contol Valves Protective Devioes = [Automate Turbine Tester BHEL, Hardwar 6.0-0002-03/3Oo “4 Qa Steam Turbine Description Cross Sectional ArrangementoOSteam Turbine Description Construction, Steam Flow ‘The turbine is a tandem compound machine with separate HP, IP and LP sections. The HP section being a single-flow ‘oylinder and the IP and LP sections double-flow cylinders. The turbine rotors and the generator rotor are connected by rigid couplings. ‘The HP turbine is throttle controlled. The initial steam is admitted ahead of the blading via two main stop and control valve combinations, A swing check valve is installed in the Tine leading from HP turbine exhaust to the Reheater to prevent hot steam from the reheater flowing back into the HP ‘turbine, The steam coming from the Reheater is passed to the IP turbine via two reheat stop and control valve combinations. Cross around pipes connects the IP and LP cylinders. Connections are provided at several points of the turbine for feed water extraction purpose. HP Turbine, Barrel Type Casing The outer casing of the HP turbine is of the barrel type and has neither an axial nor a radial flange. his prevents mass concentration which would have caused high thermal stresses. The almost perfect asymmetric design of the casing permits moderate and nearly uniform wall thickness at all sections. The inner casing is axially split and supported so as to be free to move in response to thermal expansion. As only slight pressure differences are effective, the horizontal flange ‘and joint bolts of the inner casing can be kept small. The barrel type casing permits flexibility of operation in the form of short start-up times and a high rate of change of load even at high intial steam conditions. IP Turbine ‘The IP turbine section is of double flow construction with horizontally split casings. Allowance is made for thermal movement of the inner casing within the outer casing. The inner casing carries the stationary blading. The reheated steam enters the inner casing from top and bottom. The provision of an inner casing confines high steam inlet conditions to the admission section of this casing, while the joint flange of the outer casing Is subjected only to the lower pressure and temperature effective at the exhaust from the inner casing. BHEL, Hardwar General Description LP Turbine ‘The casing of the double-flow LP cylinder is of three- shell design. The shells are horizontally split and are of Figid welded construction. The innermost shell, which carries the first rows of stationary blades, is supported s0 as to allow thermal expansion within the Intermediate shell. The intermediate shell rests at four points on longitudinal girders, independent of the outer shell. Guide blade carriers, carrying the last Stationary blade rows are also attached to the intermediate shell. Blading The entire turbine is provided with reaction blading, The stationary and moving blades of the HP and IP sections and the front rows of the LP turbines are designed with integrally milled inverted T -roots and shrouds. The last stages of the LP turbine are fitted | with twisted drop -forged moving blades with fir-ree roots engaging in grooves in the shaft with last stage stationary blades made from sheet steel. Bearings ‘The HP rotor is supported on two bearings, a journal bearing at its front end, and a combined journal and thrust bearing immediately next to the coupling to the IP rotor. The IP and LP rotors have a journal bearing each at rear end. The combined journal and thrust bearing incorporates a journal bearing and a thrust bearing which takes up residual thrust from both directions. The bearing metal temperatures are measured by thermocouples directly under the babbit lining. The temperature of the thrust bearing is ‘measured in two opposite thrust pads. ‘The bearing pedestals are anchored to the foundation by means of anchor bolts and are fixed in position. ‘The HP and IP turbines rest with their lateral support horns on the bearing pedestals at the turbine centerline level. The HP and IP casings are connected with the bearing pedestals by casing guides, which Establish the centertine alignment of the turbine casing 6.1-0002-04/1The axial position of the HP and IP casings is fixed at the support brackets on HP-IP bearing pedestal. ‘The fixed point for the LP casing is at the front point of support on the longitudinal girder. Thermal expansion of the casings originates from the fixed points. Shaft Seal and Blade Tip Sealing All shaft seals, which seal the steam in the casings against atmosphere, are axialfiow type. They consist of a large umber of thin seal strips which, in the HP and IP turbines are caulked altemately into grooves in the shafts and the surrounding seal rings. in the LP turbine, the seal strips are caulked only into the seal rings. Seal strips of similar design are also used to seal the radial blade tip clearances. Valves ‘The HP turbine is fitted with two main stop and control valves. One main stop valve and one control valve with stems arranged at right angles to each other are combined in a ‘commen body. The main stop valves are spring-action single- ‘seat valves; the control valves, also of single-seat design, have diffusers to reduce pressure losses. ‘These valve combinations are located at both sides of the turbine with their stems horizontal. The HP valves are connected to the turbine by easily separable collar couplings, which contain sel-sealing U-tings as sealing elements. The IP turbine has two reheat stop and control valves. The reheat stop valves are spring-action single-seat valves. The control valves, also spring-loaded, have diffusers. The control valves operate in parallel and are fully open in the upper load range. In the lower load range, they control the steam flow to the IP turbine and ensure stable operation even when the turbine- generator unit is supplying only the station load. The reheat stop and control valves are supported free to move in response to thermal expansion on the foundation cover plate below the operating floor and in front of the turbine-generator unit. All valves are actuated by individual hydraulic servomotors. Turbine Control System The turbine has an electro hydraulic control system. An electric system measures speed and output and controls them by operating the control valves hydraulically via an electro hydraulic converter. The electro hydraulic controller ensures controlled acceleration of the turbine-generator up to rated speed and limits speed overshoot in the event of sudden load rejection. The linear power frequency droop characteristic can be adjusted in fine steps even When the turbine is running, Turbine Monitoring System In addition to measuring and display instruments for pressure, temperatures, valve its and speed, the monitoring system also includes instruments for measuring and indicating the following parameters: = Rotor expansion measured at the rear-bearing pedestal of the LP turbine = Axial shi measured at the HP-IP pedestal = Bearing pedestal vibration, measured at all turbine bearings = Shaft vibration measured at all turbine bearings Oil Supply System ‘A common oil supply system lubricates and cools the bearings. The main oll pump is driven by the turbine shaft and draws oil from the main oil tank. Auxiliary cil pumps maintain the oil supply on start-up and shutdown, during turning gear operation and when the main oil pump is faulted. DC Emergency oll pump supplies oil fo the bearings during AC power failures. ‘A. Jacking oll pump forces high-pressure oil under the shaft journals to prevent boundary lubrication during turing gear operation. The Jacking oil pump also supplies the high pressure oil fo the Hydraulic Turning gear motor. The lubricating and cooling oil is passed through oil coolers before entering the bearings. ‘The control fluid pumps situated on a control fluid tank supply the hydraulic turbine and bypass control system and the protective devices and valve actuators with HP. and LP control fluid BHEL, Hardwar 6.1-0002-04/2‘Steam Turbine Description Fixed Points Design of the supports for the turbine has to allow for the ‘expansion of the turbine during thermal cycling. Constrained thermal expansion would cause overstressing of the components. ‘The method of attachment of the turbine components is also critical to the magnitude of the differential expansion between the rotor and turbine casings which is given careful attention in the determination of internal clearances. Centering of LP outer casing is provided by guides who run in recesses in the foundation cross beam. ‘Axial movernent of the casings is unrestrained Hence, when there is a temperature rise, the outer casings of the HP turbine expand from their fixed points towards Front pedestal, Casing of IP Turbine expand from its fixed point towards the generator. LP Casing expands from its fixed point at front end, towards the generator. [The following components form the fixed points for the turbine: | The HP, IP and LP turbine bearing pedestals || The hom supports of the HP and IP Turbine at HP-IP Pedestal At turbine end of longitudinal girder of the LP Turbine 1m The thrust bearing in the HP turbine rear beating pedestal Casing Expansion ‘The bearing pedestals are anchored to the foundation by means of anchor bolts and are fixed in position, ‘The HP and IP turbines rest with their lateral support horns ‘on the bearing pedestals at the turbine centeriine level. The HP and IP casings are connected with the bearing pedestals by casing guides which establish the centerline alignment of the turbine casings. ‘The axial position of HP and IP casings is fixed at the HP-IP pedestal Thermal expansion of the casings originates from the fixed points. ‘The LP Turbine outer casing is held in place axially, at turbine end of longitudinal girder by means of fitted keys. Free lateral expansion is allowed. Rotor Expansion ‘The thrust bearing is housed in the rear bearing pedestal of the HP turbine, ‘The HP turbine rotor expands from the thrust bearing towards the front bearing pedestal of the HP turbine and the IP turbine rotor from the thrust bearing towards the generator. ‘The LP turbine rotor is displaced towards the generator by the expansion of the shaft assembly, originating from the thrust bearing. Differential Expansion Differential expansion between the rotors and casings results from the difference between the expansion of rotor and casing originating from the HP-IP pedestal. ‘The largest differential expansions of the HP and IP turbines thus occur at the ends farthest from the thrust bearing Differential expansion between the rotor and casing of the LP turbine results from the difference between the expansion of the shaft assembly, originating from the thrust bearing and the casing expansion, which criginates from the fixed points on the LP turbine longitudinal beams. BHEL, Hardwar 6.1-0003-02/1Steam Turbine Technical Data Description Construction, Speed & Steam Pressure Load Rated Load 600 MW ‘Maximum Load under valve wide open (VWO) condition 630.222 MW Construction ‘Three Cylinder Reheat Condensing Turbine Single fow HP Turbine with 15 reaction stages Type : H30-100-2 | Double fow IP Turbine with 10 reaction stages per ow Type : M3053 Double flow LP Turbine (2 no's) with (5 drum + 3 module) stages | Type : NGO-4X6.3 2LPT) por flow 2 Main Stop and Control valves (HP easing mounted) “Type : EV 320-1 2 Reheat Stop and Control Valves (Floating) “Type V 560 1 Swing Check Valve in cold reheat ne DN-200 Make : BHEL, Tichy LP Bypass Stop and Control Valves (EHA Based) Make : CCl, Switzerland Extraction Swing Check Valves Extraction 1: No valve Extraction 2 1 Swing Check Valve with actuator and | DN 800, 1 Swing Check Valve without actuator Make : BHEL, Trichy Extraction 3 : 1 Swing Check Valve with actuator and | ON 600 1 Swing Check Valve without actuator Make : BHEL, Trichy Extraction 4.1. : 2 Swing Check Valves with actuator DN500 Make: BHEL, Trichy Extraction 4,2. : 2 Swing Check Valves with actuator DN 500 Make : BHEL, Trichy Extraction 5:1 Swing Check Valve with actuator and 1 Swing | ON 400 Check Valve without actuator Make : BHEL, Trichy Extraction6 — : No valve BHEL, Hardwar 6.1-0100-03/1Speed Rated speed 50.0cls ‘Speed limitation in load and station operation Max. Speed, no time limitation 515 ls Min. Speed, no time imitation 47S cls Permissible for maximum 2 hours during the life of LP blading ‘Speed below | 47.5 cls Speed above | 51.5 to 60 cis ‘Speed exclusion range at operation without load * 70 47.5 cls Standard over speed trip setting Max. 58.5 ols * This speed range should be passed through in one smooth operation to avoid endangering the blades due to resonance } ‘Steam Pressures Rated * | Long time operation® | short time operation” | Unit | Initial Steam 168.7 175.0 200.0 bar | Before HP drum stage | 156.5 169.8 169.8 bar HP cylinder exhaust 4405 | 50.66 52.86 bar IP cylinder stop valve inlet | 39.64 45.98 4787 bar Extraction 6 44.08 50.69 62.90 bar Extraction 5 16.28 19.21 19.21 bar Extraction 4 7.26 art art bar Extraction 3 2.552 att an bar Extraction 2 0.989 1.22 422 bar Extraction 4 0.392 0.49 0.49) bar LP cylinder exhaust 0.1013 03 03 bar ‘These values correspond to 600 MW load with 3 % make-up and 76mmHg with all heaters in service and rated conditions. ‘4 The safety valves must be set so that short time values are not exceeded. ‘+ Long time operation: Upper limit value, permissible without time limit. '¥ Short ime operation: Permissible momentary value. The aggregate duration of such swings must not exceed 12 hours in any one year. All pressures are absolute pressures. BHEL, Hardwar 6.1-0100-03/2Low Vacuum Trip, Standard Setting Electrical low vacuum trip 0.3 bar Electrical low vacuum tip bypass operation 06 bar Seal Steam Supply System Pressure in seal steam header (above atmospheric) 35 mbar Axial Shift ‘Alarm £0.5mm Trip £1.0mm Direction of Rotation ‘Anti clock wise when viewed from Front Pedestal towards the Generator BHEL, Hardwar 6.1-0100-03/3erm Steam Turbine Technical Data 1/774 Description Steam & Casing Temperatures Steam Temperatures ated vave,[Lonotom [00 wa] 80 ws Peryor cee ee eee o | perveat | Mae is i average annual average individual case | Unit Vai scan ane sor‘ a6 wo foes % Slope nt HR seam at [saTo | 83 wo fees Bs Pace vane inlet | Steam Temperatures Rated vave [Long ve [80 ho, Por yea [in ped ° seetain | Hanis ite | ease a | wekrcate "| ood HP turbine exhaust 337.9 s309] 429.9 | 500.0 °c Extraction 6 337.9 339.9 429.9 | 600.0 °c Eaveton a0) i890 600 Extraction 4 - 297.2 307.2 347.2 °c Eereten’ wa] 168 288 Eereion? ost| 1198 Tea erection 74] 85a vas * (Pune eteost | set | 790 700 “7 Cont tom opera: wpa nt valve pamisbe wi ie I * Those aos caeapond e600 HH Loe wih 3% meteup ard 7énmiy wt astern Tenses andre soa enon + Only vl for the no lod porod wih High reheat pressure ater tout tom hi fad re st iscl aceon 13 mouos ‘ho turbine mmedoteyreleaded oro bterinmedtl reduced to minum oad re (od operaven ate Casing tal Temperatures Wa Tenparatwes [Ramat Taatne sto dt dom at [Ur TP tine easing exhaust | 486 500 °c Outer casng of P| 80 70 Es ir ‘Spray water to LP turbine must be switched on at 90°C BHEL, Hardwar 6.1-0101-03/4Casing Motal Temperature Differences Temperature Difference Alarm at Machine must be tripped at _| Unit Between upper & lower casing | +90 £100 °c halves of HP turbine, middle Between upper & lower casing | + 30 $45 °c halves of IP turbine, front Between upper & lower casing | +30 £45 °c halves of IP turbine, rear Permissible Differential Temperature between Parallel Steam Supply Lines No time limitation 7 °c. Short time period (15 min) 28 °c. In the hottest line the limitations indicated for main and reheat steam temperature must not be exceeded Feed Wator Heater out of Se Operation with feed water heaters out of service Main steam flow, Kas | Load, (indicative) Mw Extraction A6, AS (Both strings out) ~ 454.954 600 Output Limit During Testing with Automatic Turbine Tester Testing of main steam stop and contol valves = 300 mw Testing of HRH steam stop and contol valves 300 Mw Motoring Motoring is the condition in which the turbine is driven by the generator at rated speed with the stop and control valves closed. inthis operating mode, certain turbine components are heated up by wind age power of the blading. To prevent heat-up beyond permissible temperatures, motoring must not be allowed to continue for longer than one minute. If the condenser low vacuum limit of 0.3 bars is exceeded, motoring ‘must not be allowed to continue for more than 4 seconds. BHEL, Hardwar 6.1-0101-03/2aa ‘Steam Turbine Technical Data Description Bearing Metal Temperatures Vibration, Weights Bearing babbit metal temperatures ‘Alarm at | Machine must be shut down at Operation temperature below 75 °C 20°C. 130°C Operation temperature 75 to 85 °C 100°C 190°C ‘Operation temperature 85 to 90 °C 110 °C 130°C (Operation temperature above 90 °C 116°C 130°C Vibration ‘Absolute bearing housing vibration | Absolute shaft vibration ‘Standard alarm setting 50 jim above normal level ‘Maximum alarm setting 84 wm 200 um Limit value for tripping 106 um 320 um = The normal level is the reproducible vibrational behaviour typical for the machine & dependent on the operating conditions. + Vibration readings indicated in control room are peak to peak. The above values are also given in peak to peak Weights HP turbine, completely assembled 95 IP turbine, top haif outer casing 26T IP turbine, top half inner casing, complete with blading 16T LLP turbine, top half outer casing complete 224T LP turbine, top half inner outer casing, complete with blading, guide blade carriers & 21.5 diffusers HP turbine rotor, complete with blading 16T IP turbine rotor, complete with blading 23 LLP turbine rotor, complete with blading oT ‘Main stop and control vaive, complete with servo motors, without bend & pipe section | 22 T Reheat stop and control valve, complete with servo motors, without bend & pipe 32T section ‘All Weights Have Been Calculated With Safety Allowances. Slings Chosen Must Provide Sufficient Security. BHEL, Hardwar 6.1-0102-03a‘Steam Turbine Technical Data Deseri Oil Supply, Oil Pumps OIL supply Main ol tank, rated capacity 2s40 [we First oil filing (estimated) 53 we Flushing oil quantity (estimated) 32 uw Oil cooler for operation, number 1 No. Oil cooler for reserve, number 1 No. Min. | 38 °c Oil temperature at cooler outlet, uit in operation Normal } 45 Max. | 47 il temperature at cooler outlet, unit shut down Max. | 75 °c ‘Temperature rise of oll in bearings Normal | 20 °c Max. | 25 Estimated oil requirement for Bearing 1 087 mis Estimated ol requirement for Bearing 2 15.25 dm'ts Estimated oil requirement for Bearing 3 691 mls Estimated oil requirement for Bearing 4 6st dm’rs Estimated oil requirement for Generator front bearing 588 dm*ts Estimated oll requirement for Generator rear bearing 5.86 dm'ts Estimated oll requirement for Exciter bearing 0.70 dm'ts Estimated oll requirement for Hydraulic Barting at 4.5 ~ 5.0 bar 73.752 | dm‘ls Duplo ol fiter ful ow, Type: RFDL 4020 Nb 150 1 No. Make: Ms HYDAC FILTERTECHNIK GMBH. Germany Filtration particle size of duplex fier element 25 um Filtration particle size of main oil tan fier element 250 um Safety valve in jacking oil system, setting 200 bar Pressure limiting valve in jacking ol system, setting 178 bar BHEL, Hardwar 6.1-0103-03/1Duplex oil fiter for jacking oll, Type: DFDK 330 D40 WiHei-V-S0212 | 4 No Make: M/s: HYDAC FILTER TECHNIK GMBH ,Germany Filtration particle size of jacking oil fiter 40 um Jacking Oil Pump, Cutn and Cut-Out Speeds * Jacking oil pump must be in operation at turbine speeds below approx. 510 rpm to avoid damage to bearings. + Jacking oll pump should be cut-out at speeds above approx. 540 rpm. Oil Pumps ‘Auxiliary oi! | DC emergency| Jacking oll pump pump oil pump Quantity 2 act | pet ‘ually [Make Rated Discharge | Type | Speed Capacity | Pressure (Ws) (Kglom’) ‘Main oil 1 ‘BHEL 92.31 84 ‘350m™hr | 3000 pump BHEL, Hardwar 6.1-0103-03/2Steam Turbine V1}]7] Description Technical Data Control Fluid System & Control Fluid Pumps CONTROL FLUID SYSTEM ‘A Fire Resistant Fluid (FRF) i used for the Control System Control fluid tank, rated capacity 1016 Me First fil quantity (estimated) 15 me Flushing fluid quantity (estimated) 12 uM Control uid cooler for operation [1 No. Control fui cooler for reserve 1 No. Control Fluld Regeneration System Gear pump: Make: Tushaco - Fluid flow: 0.25 dm*is Gauge pressure 3 bar speed 23.42 ‘om Motor power 0.55 KW 1 No. Drying fitr 4 Nos. Fulle’s earth fiter 1 No. Fine fer /BHEL, Hardwar 6.1-0104-03/1Control Fluid Pumps Control uid pumps [2 Nos. Manufacturer KSB, Type: WKVMBO/1+3 Speed 2962 ‘pm Drive ‘AC. motor, Manufacturer ~ Siemens AG Type: ILG4313-2ABO4Z Enclosure IP 56 Voltage 415 v Frequency 50 He Motor rating (at 50°C) | 121 KW Motor rating (at 40°) | 132 KW Rated current 196 A Starting current | 1614 - A Control Fluid Pumps Operating Characteristics Fuig tow | Discharge (ams) Pressure (bar) Operating point | (normal operation) _ Low pressure leakage fid 76 45 High pressure leakage fuid 6.16 385 Operating pont I (during start & opening of stop valve servomotors) Low pressure leakage fuid & low pressure control fuid 20.60 108 High pressure leakage Muid 6.16 378 ‘Operating point It (during opening of CV servorntors) Low pressure leakage hid 7.60 100 High pressure leakage Mud & high pressure control fuid | 16.16 310 All Pressures are Gauge Pressures. BHEL, Hardwar 6.1-0104-03/2Sigyem) © Steam Turbine Technical Data Limit Curves rjiiz4 Operation Permissible temperature difference A0 in the wall of HP stop and control valve casing during Sliding Pressure Operation Mode A0tK) T 400 500 600 9 re) 40 = (0)- Om) on the wall temperature sensor 6) = temperature of inner layer Om = temperature of middle layer 6.1-0110-01 BHEL, Hardwarg Steam Turbine Technical Data F174 Operation Limit Curves Permissible temperature difference A@ in the wall of HP casing during Sliding Pressure Operation Mode 0K] (Gj 8m) on the wall temperature sensor temperature of inner layer temperature of middle layer HEL, Hardwar 6.1-0111-01/1Permissible temperature difference 49 in the wall of the HP casing during Constant Pressure Operation Mode 49K] 100 200 300 400 500 600 8m °C 89 = (Gj 0,) on the wall temperature sensor ©; = temperature of inner layer Om = temperature of middle ayer BHEL, Hardwar 6.1-0111-04/2re ‘Steam Turbine P3174 Operation Technical Data Limit Curves Permissible temperature difference 0 in the HP turbine shaft during Sliding Pressure Operation Mode 00K) ‘s0[K] ee H oH . ax PC) om 40 60 80 100120 gage (G0 - Om) on the wall temperature sensor ‘outer layer temperature of the shaft ‘temperature of middle layer in the shaft (calculated) temperature of axis in the shaft (calculated) BHEL, Hardwar 6.1-0112-01/1Permissible temperature difference 0 in the HP turbine shaft during Constant Pressure Operation Mode 180 ay ws ao FETT ag ao Hee too LEEEES ao Ht eo LEECH 200k | ag reo 20 ° m0 ao 0 fo asin ow Loo EEE © 100 200 300400500 200 180 160 140 120 + 00K) 100 80 60 “ Ye FC] 0 20 40 «6 80 100 120 (G0 - Om) on the wall temperature sensor outer layer temperature of the shaft ‘temperature of middie layer in the shatt (calculated) temperature of axis in the shaft (calculated) BHEL, Hardwar 6.1-0112-01/2Steam Turbine Technical Data V]}174 Operation Limit Curves Permissible temperature difference A@ in the IP turbine shaft during Ee Heating Up: 180 160 140 0K] Oa PCI 86 = (0 - 8m) on the wall temperature sensor 00 = outer layer temperature of the shaft ‘0m = _ temperature of middle layer in the shaft (calculated) Bax = temperature of axis in the shaft (calculated) BHEL, Hardwar 6.1-0113-01