annexure-ii c d on tender

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Customer : Jindal ITF Ltd Page : Annex-II 2 of 13

Project : 1x12MW Power Plant Date: 10.07.14

Offer Ref : TL/SPP/JITF/2408/R0

S.NO Section Page NoClause

NoRequirement as per Tender

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The power cycle shall be finalised witha deaerator & HP heater to give a finalboiler inlet feed water temperature of200C.

CWe are not considering HP heater inthe circuit

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7.1 10 Start up vent capacity 70% MCR DStart up vent capacity will be 30%MCR minimum

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As the proximate analysis, elementalash analysis of the fuel are notavailable, we have assumed fuelanalysis as per our offer.

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7.1.2Codes & Standards Centrifugalpumps API610 / DIN 1944

CCentrifugal pumps shall be designedas per ANSI standards

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7.1.3 MOC Superheater tubes (


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7.1.3 MOC Flue gas ducting CFlue gas ducting material shall beIS2062

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7.1.3 MOC Structurals CAll structural support material will beof IS2062

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7.1.3 MOC DM water tank C DM water tank will be of MSEP

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7.1.4 Fans Margin on head CFor all fans, margin will beconsidered on variable heads

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7.1.11Deaerator dished end thickness 10mm min

CDeaerator dished end thickness shallbe as per design requirements

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7.1.14 Flue Gas De-sulphurisation system DThe same is not envisaged in ourdesign

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7.2.1 Steam turbine CThe turbine offered is bleed cumcondensing turbine

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537.2.1

The turbine shall be designed with103% VWO and shall be capable ofoperating continuously.

CWe have not considered any VWO

condition for our design


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7.2.6The pump capacity and dischargepressure shall be a minimum of 115%of the MCR rating.

CWe have considered 5% margin onpump capacity and dischargepressure

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7.2.7 HP heater CWe have envisaged only LP heater inour design. HP heater is notconsidered.

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7.3.1 Fuel handling system CFuel handling system shall be asmentioned in our offer

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21 of53 7.3.2 Bottom ash handling system C We have envisaged submerged ashconveying system for bottom ash

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7.3.3 Plant water system CKindly furnish raw water analysis tosuggest a suitable water treatmentscheme

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7.3.5 Compressed air system CWe have envisaged (2x100%)lubricated screw compressor for theproposed power plant

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7.3.7 Fuel Oil System CFuel Oil system is not applicable aswe are offering Pusher Grate boiler

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7.3.9 Fire Protection System CWe are considering only fireextinguishers in our scope. Firehydrant system are envisaged

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537.3.10 Cranes and Hoist C

We have considered EOT crane of

capacity 15/5TON.


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7.3.10 One passenger cum goods elevator CWe have considered passenger cumgoods elevator in our scope of supply

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7.3.11 Chemical Laboratory CWe have not considered chemicallaboratory in our scope

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7.4.111 kV for large auxiliaries (200 kWabove), 415 Volts for small auxiliaries(200 kW and less than 200kW)

DKindly note, motor rating up to250kW shall be LT driven. We are notoffering HT motor.

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Fault levels: Fault levels for the

various voltage systems for design ofbreakers are as under:11 kV - 40 kA (rms) for 1 Sec

D

Fault level for HT system shall be

26.1kA for 1 sec and LT system shallbe 50KA for 1Sec. Kindly accept.

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7.4.2Scope of 66kV switchyard

CKindly clarify scope of 66kVswitchyard in EPC scope or customerscope.

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7.4.3

The Generator proposed for the plantare of reputed make three phase, twopole, cylindrical rotor, wye connectedmachine directly driven by steam

turbine with phase and neutralterminals brought out for connectionto isolated segregate phase bus duct

with rated output of 12MW, powerfactor of 0.85 lagging, terminal voltageof 11kV, frequency of 50Hz and speedof 3000 rpm. The Stator winding is of

C

Please note, we are offering Generatoras 12MW, 50Hz, 11kV, 4 Pole.

The type of Cooling offered is CACWwith Air to Water cooler mounted on

the top side.Hydorogen cooling is not offere for thegenerator.


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water cooling while the rotor windingand iron core is of hydrogen coolingtype.

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7.4.3The Excitation system proposed shallbe Brushless excitation system. C

Pls note, we are offering BrushelessStatic excitation system withoutPMG.

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7.4.4

One (1) No. Bi-directional GeneratorTransformer for 12 MW unit is 3phase, 50 Hz, YNd11, 16/20 MVA,ONAF/ONAN cooled oil immersed

outdoor transformers with class 'A'insulation, 12.5% impedance. LV starconnected and HV star connected. LVwinding neutral is grounded through

NGR and HV winding neutral is solidlygrounded

C

Please confirm the Vector groupof theGenerator Transformer. For YNd11,LV Star connection will not beapplicable.

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7.4.4

Voltage ratio for GT will be 66/11 KV.Each transformer is provided with offcircuit tap-changer (OCTC) for (-) 5%to (+) 5 % voltage variation in steps of

2.5% on HV side.

C

Please note, generator transformershall be OLTC type. Hence OCTC isnot application

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7.4.6

Isolated Phase Bus duct & SegregatedPhase Bus Duct. 12 kV classsegregated phase bus duct (SPBD)and accessories shall be provided forconnection between Generator and 11kV HT switchgear

D

For Interconnection betweengenerator and 11kV switchgear weare considering HT cable.


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7.4.7.1

The rating of Auxiliary Transformersshall be selected on 2 x 100 % basisbased on the power plant load

requirement.

D

Kindly note, we are considering 1 x100% Auxilary transformer for thepower plant auxilaries.

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7.4.7.11

All switchgears shall have two bussections with separate incomers andbus coupler with necessary interlockand auto closing facility for Buscoupler in case of under voltage at any

one of the incoming supply.

D

Kindly note, the offered PMCC andMCC shall be with single bus systemwithout interlock and auto closing.

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7.4.7.12

The MCCs are of modular metalenclosed indoor draw out type. Eachoutgoing motor feeder has a directonline (DOL) starter unit. Motors rated

110 KW and above shall be Numerical,comprehensive motor protectionrelays. Motors less than 110 KW shallbe provided with contactor, thermaloverload relays, HRC fuses or MCCB.

D

We are considering all MCCs withdouble front and non-draw outtype, with single incomers.

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7.4.7.16

Two (2) sets of numerical protection

Unit Protection relays providing 100%redundancy self-monitoring andevent/fault recording &communication facilities

D

We are considering one (1) of

generator protection relay withoutredundancy. Relay shall be withprovision of RS485 interfacecommunication ports and MODBUSprotocol.

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Rotor earth fault (64R)Voltage balance (60) VT fuse Failmonitoring

CRotor earth fault shall be separatestatic or electro mechanical relayVoltage balance relay shall be


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Excitation system faultsStator winding temp highRotor winding temp high (only for

machine with static excitation)

separate electro mechanical relayExcitation system faults shall bepart of AVR panel.

Stator winding temp high Sameshall be hooked up from temperaturescannerRotor winding temp -Same shall be

hooked up from temperature scanner

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7.4.7.16

Overall differential (87GT)

Distance protection (21) Xii. BackupDirectional over current & E/F (67 &67N)

D

Pls furnish the SLD for the

Switchyard for our study and clarityon scope

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7.4.7.16

11 kV Switchgear:

Under voltage (27)D

Kindly note, under voltage relay shall

be considered in only bus PT paneland incomer panel. For Outgoing thesame will not be applicable.

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7.4.7.16Motor Differential protection for1000KW and above C

HT motors not applicable in theproject

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7.4.17

Neutral Grounding Resistor (NGR)

cubicle complete with Dry type,natural cooled, outdoor cast grid typeresistor to provide Non effectivegrounding of 611KV voltage systemi.e. for Generator transformerssecondary side limiting Phase toground fault current.

C

Request to clarify the Transformer

vector group.However the Generator star point willbe grounded with NGR


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537.4.19

11 KV cables are 11KV voltage grade,fire retardant low smoke (FRLS) PVCsheathed, wire/strip with XLPE

insulated stranded aluminumconductor. The cables are suitable for11 KV unearthed system.

D

Kindly note, we are considering11kV,Al, XLPE insulated , PVC NON-FRLS Sheathed cables.

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7.4.19

Control cables PVC insulated, innerPVC sheathed / galvanized steel wirearmoured and outer sheath made of

FRLS PVC compound

D

Please note, we are considering NONFRLS Sheath for control cables

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7.4.19

The plant lighting (illumination level)is varying at different locations of theplant depending on the utility andnature of work expected to be carried

out at that area.

C

Plant illumination system shall be forEquipments with in TL battery limit.

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7.4.23

Control panels shall be provided for

control of miscellaneous systems inthe power plant and outdoor controlcabinets for 245 KV circuit breakers,Isolators, transformers etc. meeting

technical requirements of the tender.

C

Kindly note, 245kV system is not

applicable.

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7.4.23

The push button station shall behoused in totally enclosed. Dust andvermin proof enclosure conforming toIP55 degree of enclosure protection forindoor and IP 65 for outdoorapplications.

D

Kindly note, the push button stationshall Dust and vermin proofenclosure conforming to IP55 degreeof enclosure protection for indoor andIP 56 for outdoor applications.


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7.5

System configuration for compositeC&I Package Scheme is enclosed inthe Drawing No: TE-1102-910-CI-3-

0001 Rev 00 D

DCS with Single Redundant

controller shall be provided forcomplete plant operation excluding

WTP and Compressor.WTP and Compressor shall have localcontrol panel with Unit control panel.

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7.5.2.4

Balance of plant systems shall be

controlled from Programmable LogicController (PLC) based SCADA system

and local control system with facilityto interface with main DCS formonitoring. Balance of plant(BOP) system shall include thefollowing.i) Fuel handling systemii) Ash handling system

iii) Water Treatment Plant

D

Fuel Handling and Ash Handling

system shall be controlled from

Central DCS control itself.WTP shall have local control panelwith Unit Control Panel

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7.5.2.6

Signal & Control cables, special

cables, cable accessories like lugs,glands. etc, Fibre optic convertors atboth DCS & PLC ends, light interfaceunit with all power supplies shall beprovided.

C

Fibre optic and accessories shall be

provided if applicable.

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7.5.2.11 Plant Communication system shall be D Plant communication is not


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5002 provided for quick and reliablecommunication between plantpersonnel.

envisaged

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7.5.2.12Instrument lab equipment with allnecessary furnitures shall be provided

DInstrument Lab equipments are notenvisaged.

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7.5.2.1

Utility Plants

Utilities such as Ash handling system,

Fuel handling system, Watertreatment plant and Instrument /service air compressors shall beoperated automatically from PLCbased local control systems with seriallink to DCS for monitoring.

C

Fuel Handling and Ash Handlingsystem shall be controlled from

Central DCS control itself.

WTP shall have local control panelwith Unit Control Panel

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7.5.2.2

Distributed Control System

D

IO Redundancy for critical signals isnot envisaged. However for criticalClosed loops like Drum level andFurnace draft the Level transmitter

and pressure transmitter shall have1oo2 voting.

10% Installed Spares and 10%Future spare space shall beconsidered.


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7.5.2.4Operator Interface and Control Panel

C

3D monitors are not envisaged.However the Graphics for theequipments shall be denoted with 3D

shapes

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7.5.2.5

Programmable Logic Controller (PLC)

D

DCS with Single Redundantcontroller shall be provided forcomplete plant operation excluding

WTP and Compressor.WTP and Compressor shall have local

control panel with Unit control panel.

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7.5.2.6

Two out of three logics is implementedfor critical loops; and for partialcritical loops one out of two logics isapplied. For non-critical loops, no

redundancy has been envisaged.D

For critical Closed loops like Drumlevel and Furnace draft the Leveltransmitter and pressure transmittershall have 1oo2 voting. For other allloops, instruments shall be only onefor the control and monitoring.

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7.5.2.7

Instrumentation Pipes/Tubes andFittings

Open type transmitter racks would beprovided to group and mount all

pressure, Flow and level transmitters.Temperature transmitters would bemounted in enclosed boxes

C

All transmitters shall be suppliedwith enclosure protection of IP65.

Racks and Enclosed boxes shall notbe considered.

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7.5.2.8 Steam & Water Analysis System D SWAS Is not envisaged.


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7.5.2.10 Gas AnalysersD

SPM and opacity monitors are notenvisaged.

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7.5.2.11 Fire Detection System CFire Detection system is notenvisaged.

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7.5.2.13 Instrumentation Cables D

Insulation of extruded PVC insulationconforming to IS 5831/84 Type A.Cables shall be provided withextruded PVC inner sheath as per IS5831/84 type ST1. The cable shall besheathed with extruded NON-FRLS

PVC. Thickness of the sheath shall beas per IS 1554 Part. 1.

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7.5.2.14 Plant Communication System DPlant communication System is notenvisaged.

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7.5.2.16 Spares DOperational Spares for 2 years arenot envisaged.

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7.6 Civil Works CWe have excluded all civil works fromour scope.

annexure-ii c d on tender

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