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5. ELEMENTAL SYSTEMS CODE

F1 F2 F3F1 F2 F3 SYSTEM DESCRIPTION A DISTRIBUTION AND GRID SYSTEMS

AD AD_ SWITCHYARD 220 kV-245 kV AE AE_ SWITCHYARD 110 kV-150 kV AQ MEASURING AND METERING EQUIPMENT

AQA Energy Metering AR AR_ GRID & DISTRIBUTION PROTECTION EQUIPMENT AS AS_ GRID & DISTRIBUTION DECENTRALIZED PANEL &

CABINETAX CENTRAL EQUIPMENT

AXP Cathodic protection system B POWER TRANSMISSION AND AUXILIARY POWER SUPPLY

BA POWER TRANSMISSION BAA Generator power evacuation BAC Generator circuit breaker including cooling system BAT Generator Step-up Transformer BAW Earthing and lightning proteccin system BAY Electrical Protections and Control (synchronizing equipment)

BB MEDIUM-VOLTAGE DISTRIBUTION BOARDS AND TRANSFORMERS, NORMAL SYSTEMS

BBA Normal MV switchgear BBB MV non-segregated phase busbars BBT Auxiliary Transformers BBW Auxiliary Transformers grounding system

BD MEDIUM VOLTAGE EMERGENCY DISTRIBUTION BOARDS AND TRANSFORMERS, (DIESEL) EMERGENCY POWER SYSTEM

BDA Emergency MV distribution BF LOW VOLTAGE MAIN DISTRIBUTION BOARDS AND

TRANSFORMERS, NORMAL SYSTEMSBFA Normal LV switchgear BFB LV non-segregated phase busbars BFT MV/LV distribution transformers

BJ LOW VOLTAGE DISTRIBUTION BOARDS AND TRANSFORMERS, NORMAL SYSTEMS

BJA Normal LV motor control centers BL LOW VOLTAGE DISTRIBUTION BOARDS AND

TRANSFORMERS, GENERAL PURPOSE BLA Normal lighting switchgear BLL Normal lighting panel BLE Welding panel BLS Safety lighting

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F1 F2 F3 SYSTEM DESCRIPTION BLT Normal lighting transformers

BM LOW VOLTAGE DISTRIBUTION BOARDS AND TRANSFORMERS, (DIESEL) EMERGENCY POWER SYSTEM 1

BMA Emergency LV switchgear BMB Emergency LV motor control centers (MCC) BMC Emergency LV non-segregated phase busbars BMT Emergency MV/LV distribution transformers

BN LOW VOLTAGE DISTRIBUTION BOARDS AND TRANSFORMERS, (DIESEL) EMERGENCY POWER SYSTEM 2

BNA Emergency lighting switchgear BNT Emergency lighting transformers

BR LOW VOLTAGE DISTRIBUTION BOARDS, UNINTERRUPTIBLE (CONVERTER) POWER SUPPLY

BRA Permanent 230 V production and distribution board BRT 400/230 V bypass transformers BRU Permanent 230 V production and distribution inverters

BT BATTERY SYSTEMSBTA 125 V BatteryBTL DC 125 V power production - Battery Charger

BU DIRECT VOLTAGE DISTRIBUTION BOARDS, NORMAL POWER SYSTEMS

BUA DC 125 V power distribution C INSTRUMENTATION AND CONTROL EQUIPMENT

CA CA_ PROTECTIVE INTERLOCKS CB FUNCTIONAL GROUPS CONTROL CABINET, SUBLOOP

CONTROL CBD Gypsum transportation and storage CBP Generator Synchronisation & Coupling

CC CC_ BINARY SIGNAL CONDITIONING CD CD_ DRIVE CONTROL INTERFACE CE CE_ ANNUNCIATION AND ALARMS CF CF_ RECORDING, MEASUREMENTS CG CG_ CLOSED-LOOP CONTROL (EXCL. POWER SECTION) CH_ CH_ PROTECTION

CHA-CHD Generator and transformer protection

CHE-CHY Protection

CJ OVERALL BLOCK AUTOMATION, UNIT COORDINATION LEVEL, TURBINE CONTROL CABINET

CJA Main automation system (including cabinets) CJD Start-up control, set point control (including cabinets) CJF Boiler control system (including cabinets)

CJJ-CJN Instrumentation and control cabinet for turbine set

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F1 F2 F3 SYSTEM DESCRIPTION CJU-

CJYInstrumentation and control cabinet for other main and heavy machinery

CS CS_ DCS CABINETS I/O CABINETS CV MARSHALLING RACKS

CVA Logic marshalling boxes and cubicles CW CONTROL ROOMS

CWA Control room: control consoles CWF Control room: control panels CWQ Control room: printers

CX CX_ LOCAL CONTROL STATIONS CY COMMUNICATION EQUIPMENT

CYA Telephone system CYB Loudspeaker System CYD Data Communication Systems CYE Fire fighting control system CYF Time distribution, clock system CYN interpone (paging system)

E CONVENTIONAL FUEL SUPPLY AND WASTE DISPOSAL EA UNLOADING AND STORAGE OF COAL

EAC Transport system EAD Stacking system EAE Bunker system, storage area EAF Bucket wheel system, reclaimer system EAT Weighing equipment EAU Sampling equipment

EB MECHANICAL TREATMENT OF COAL EBA Transport system EBB Mixing system EBC Crusher system EBD Screening system EBE Separator system an discharge equipment EBR Residues removal EBT Weighing equipment EBU Sampling equipment

EC DISTRIBUTION OF COAL ECT Weighing equipment ECU Sampling equipment

ED CHEMICAL TREATMENT OF SOLID FUELS ED_ Limestone system

EG SUPPLY OF LIQUID FUELS EGA Fuel-oil unloading EGB Fuel-oil storage EGC Pumping system

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F1 F2 F3 SYSTEM DESCRIPTION EGD Fuel-oil piping EGS Fuel-oil treatment EGT Heating medium system

EK SUPPLY OF GASEOUS FUELEKA Inlet Pipe lineEKB Gas moisture separation EKC Heating EKD Gas feeding (Common site gas station, RMS) EKE Gas scrubber EKG Gas piping EKH Main pressure boosting system EKT Gas heating (CC) (gas heater) (heating media (systems) EKW Sealing fluid supply system

EN SUPPLY OF PETROLEUM COKE EN_ Supply of Petroleum coke

EP TREATMENT OF PETROLEUM COKE EP_ Treatment of Petroleum coke

ER IGNITION FUEL SUPPLYERA Pulverized coal supply system ERB Oil supply system ERC Gas supply system

ET ASH AND SLAG REMOVAL SYSTEM ETA Wet ash conveying system ETB Storage system for wet ash ETC Wet ash dredger ETD Conveying system for granulate ETE Storage system for granulate ETG Conveying system for dry ash ETH Storage system for dry ash ETK Common conveying system for wet and dry ash ETL Common storage system for wet and dry ash ETM Settling plant for wet and dry ash

ETN Fordwarding, distribution, recovery and disposal systems for flushing and ash water ETP Generation and distribution system for carrier air

G WATER SUPPLY AND DISPOSAL GA RAW WATER SUPPLY

GAC Piping. Tank connection = Raw Water System GAD Water pump tank GAF Raw water pumping

GB GB_ TREATMENT SYSTEMGC DEMINERALISED WATER PRODUCTION (demineralised

water package plant) GCF Reverse osmosis + EDI and auxiliary equipment

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F1 F2 F3 SYSTEM DESCRIPTION GCN Chemical dosing water treatment plant

GD OTHER TREATMENT SYSTEMS (Desalinated water production, )

GDD Pretreatment and auxiliary equipment GDG Evaporation system GDQ Potable water production plant

GH DISTRIBUTION SYSTEMS (NOT DRINKING WATER) GHA Service water storage and distribution GHC Demineralised water storage and distribution GHD Desalinated water storage and distribution

GK DRINKING WATER SUPPLY GKB Drinking water

GM PROCESS DRAIN SYSTEMGMA Waste Water (Oily) GMB Miscellaneous Process Water Drains and Blowdown

GN PROCESS DRAINS TREATMENT SYSTEM GN_ Industrial effluents treatment (package plant), Process Drain

treatment plant GR DOMESTIC WATER TREATMENT SYSTEM

GR_ Domestic Waste Water treatment plant GU RAINWATER COLLECTION AND DRAINAGE SYSTEM (INCL.

TREATMENT SYSTEM)GU_ Rain water collection and drainage

H CONVENTIONAL HEAT GENERATION HA PRESSURE SYSTEM, FEEDWATER AND STEAM SECTIONS

HAA LP part-flow feed heating system HAB HP part-flow feed heating system HAC Economizar system HAD Evaporator HAG Circulation system HAH Superheater system HAJ Reheat steam system HAN Pressure system drain and venting

HB SUPPORT STRUCTURE, ENCLOSURE, STEAM GENERATOR INTERIOR

HB_ Support Structure, Enclosure, Steam Generator Interior HC FIRESIDE HEAT TRANSFER SURFACE CLEANING

EQUIPMENTHCB Steam sootblowing system

HD ASH AND SLAG REMOVAL HDA Furnace ash and slag removal HDC Flue dust return system HDU Feed air system HDW Sealing air supply system

HF BUNKER, FEEDER AND PULVERIZING SYSTEM

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F1 F2 F3 SYSTEM DESCRIPTION HFA Bunker for pulverizing system HFB Feeder system HFC Pulverizing system HFD Flue gas return system HFE Mill and carrier air system

HFF Vapour / exhaust gas system HFW Seal air system HH MAIN FIRING SYSTEM

HHA Main burners HHD Fly ash recirculation HHE Fuel feeding system HHH Bed material system HHL Combustion air supply system HHN Wall seal air system HHW Sealing air supply system

HJ IGNITION FIRING EQUIPMENT (IF SEPARATE) HJA Start-up burners HJF Gas-oil supply start-up burners HJG Natural gas supply start-up burners HJL Combustion air supply start-up burners HJN Fuel atomizing air supply start-up burners HJS Cooling air supply star-up burners

HL COMBUSTION AIR SYSTEM (PRIMARY AIR, SECONDARY AIR)HLA Ducting system HLB Fan system HLC Steam air preheaters HLD Flue gas air heaters

HN FLUE GAS EXHAUSTHNA Ducting system HNC Flue gas fan system HNE Smoke stack system (chimney) HNY Flue gas exhaust control and protection equipment

HQ ELECTROSTATIC PRECIPITATOR HQ_ Electrostatic precipitator system

HR CHEMICAL FLUE GAS TREATMENT SYSTEM HRB Limestone system HRU Feed air system HRW Sealing air supply system

HY CONTROL & PROTECTION EQUIPMENT HY_ Control and protection HYC SafetyHYR Analogue control and instrumentation

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F1 F2 F3 SYSTEM DESCRIPTION L STEAM, WATER, GAS CYCLES

LA FEEDWATER SYSTEM LAA Storage and deaeration LAB Feedwater piping LAC Feedwater pumping LAD HP feedwater heating system LAE HP Desuperheating spray system LAF IP Desuperheating spray system LAV Lubricant supply LAW Sealing fluid supply

LB STEAM SYSTEMS LBA Main steamLBB Hot reheat steam LBC Cold reheat steam LBD Extraction / Low pressure steam LBF HP reducing station LBG Auxiliary steam distributionLBH Start-up steam system LBJ Moisture separador / reheater (MSR) LBQ Extraction steam piping system for HP feedwater heating LBS Extraction steam piping system for LP feedwater heating LBU Common dump line LBW Sealing steam system LBY Control and protection equipment

LC CONDENSATE SYSTEM LCA Condensate piping LCB Condensate pumps LCC Main condensate heating system LCE Condensate desuperheating spray system LCH HP heater drains system LCJ LP heater drains system LCL Steam generador drains system LCN Auxiliary steam condensate system LCP Condenser make-up (Standby condensate system storage and

piping) LCQ Steam generador blow down system LCR Standby condensate system distribution LCS Reheater drains system

LCT Moisture separator drains system LCW Sealing and cooling drains system LD LD_ CONDENSATE POLISHING PLANT

M MAIN MACHINE SETS MA STEAM TURBINE PLANT

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F1 F2 F3 SYSTEM DESCRIPTION MAA Steam turbine itself (HP Part) MAB Steam turbine ( IP Part) MAC Steam turbine ( LP Part) MAD Steam turbine Bearings MAG Main Condenser MAJ Condenser vacuum MAK Turbine Standby turning gear MAL Turbine Vents and Drains MAN Turbine bypass station MAP Turbine bypass piping and steam dump MAV Turbine lubrication, jacking oil MAW Turbine gland steam sealing MAX Turbine control fluid skid for governing & protection MAY Turbine protection

MK GENERATOR PLANT MKA Generator complete MKC Generator excitation & automatic voltage regulator MKD Generator Bearings MKF Generator stator and rotor liquid cooling MKV Generator lubricant oil system MKW Generator sealing fluid supply MKX Generator fluid supply system for control MKY Generator protection system (mech protection which trips

Generator) MP COMMON INSTALLATIONS FOR MAIN MACHINE SETS

MPA Foundations MPB SheatingMPG Frame, support structure MPR Forced cooling system MPS Drying and layup system

MV LUBE OIL SUPPLY SYSTEMMV_ Lube oil treatment system

N PROCESS ENERGY SUPPLY FOR EXTERNAL USERS NA PROCESS STEAM SYSTEM

NAA Piping system (steam) NAB Piping system (condensate) NAD Process heat transmission system

ND PROCESS HOT WATER SYSTEMS NDA Piping system (forward) NDB Piping system (return) NDC Process hot water pump system NDD Process heat transfer NDE Hot water storage system

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F1 F2 F3 SYSTEM DESCRIPTION NDF Distribution system

P COOLING WATER SYSTEMS PA CIRCULATING (MAIN COOLING) WATER SYSTEMS

PAA Main Cooling water filtration PAB Main cooling Piping PAC Main Cooling water pumping PAD Outfall Cooling system PAH Condenser cleaning system PAR Makeup water piping system PAS Makeup water pump system

PB CIRCULATING (MAIN COOLING) WATER TREATMENT SYSTEM

PBN Main Cooling water chemical supply system (conditioning) PC SERVICE (SECONDARY COOLING) WATER SYSTEM

PCA Intake and cleaning facilities PCB PipingPCC Pumping

PG CLOSED COOLING WATER SYSTEM PGB PipingPGC Pumping

Q AUXILIARY SYSTEMSQC CENTRAL CHEMICAL SUPPLY

QCA O2 scavenger system QCB Amine system QCC Phosphate system QCD Corrosion inhibitor system

QF GENERAL CONTROL AIR SUPPLY QFA Instrument and Control air production (if separate from SCA) QFB Instrument and Control air distribution

QH AUXILIARY STEAM GENERATING SYSTEM QHA Auxiliary steam production QHE Blowdown system, flash drain system QHH Auxiliary boiler burners

QJ CENTRAL GAS SUPPLY (also INERT GAS) QJA Nitrogen storage and distribution system

QL FEEDWATER, STEAM, CONDENSATE CYCLE OF AUX. STEAM GENERATING AND DISTRIBUTION SYSTEM

QLB Auxiliary steam distribution QU SAMPLING SYSTEMS

QU_ Chemical control and sampling R GAS GENERATION AND TREATMENT

RS SUPPLY AND REMOVAL SYSTEMS FOR WATER STEAM AND CONDENSATE

RSA Condensing and feedwater heating plant cleaning (temporary)

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F1 F2 F3 SYSTEM DESCRIPTION RSB Steam or air blowing piping (temporary) RSC Boiler cleaning (temporary)

S ANCILLARY SYSTEMS SA HVAC SYSTEMS

SAA Building ventilation SAC ST generator and compartment ventilation SAE Turbine generator compartment ventilation SAK Building air conditioning, heating and ventilation SAM Turbine hall ventilation SAW Building heating

SB SPACE HEATING SYSTEMSSBB Electrical heat tracing

SC STATIONARY COMPRESSED AIR SUPPLIES SCA Compressed air production SCB Service air distribution

SG STATIONARY FIRE PROTECTIONS SYSTEMSSGA Fire fighting water systems SGC Spray deluge systems SGE Sprinkler systems SGG Tank roof, tank shell cooling system SGH Extinguishing steam to fuel feeding SGJ CO2 firefighting systems SGK Gaseous clean agents firefighting systems SGL Powder firefighting system SGY Control and detection system

SM CRANES, STATIONARY HOIST AND CONVEYING APPLIANCES

SM_ Cranes and Hoists SN SN_ ELEVATORS SQ SQ_ ROAD FACILITIES ST ST_ WORKSHOP, LABORATORY EQUIPMENT

U STRUCTURES UA UA_ SUBSTATION STRUCTURESUB STRUCTURES FOR POWER TRANSMISSION AND

AUXILIARY POWER SUPPLY UBE Structures for electrical building UBF Structures for transformers

UC UC_ CONTROL AND INSTRUMENTATION STRUCTURES UE FUEL SUPPLY FACILITIES

UEJ Liquid fuel facilitiesUEN Gas fuel facilities (except Regulating and Metering Station) UER Gas fuel facilities (RMS)

UG WATER SUPPLY AND TREATMENT FACILITIES UGD Structures for demineralised water

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F1 F2 F3 SYSTEM DESCRIPTION UGF Structures for fire protection water UGG Structures for drinking water UGU Structures for effluents

UH STRUCTURES FOR CONVENTIONAL HEAT GENERATION UHA Steam generator structures

UL STEAM, WATER AND GAS CYCLE STRUCTURES (PIPE RACKS)

ULA Structures for feedwater pump house UM STRUCTURES FOR MAIN MACHINE SETS

UMA Steam turbine building or common UMJ Diesel generator building

UP UP_ CIRCULATING WATER (COOLING) SYSTEM STRUCTURES: E.G.: CIRCULATING WATER INTAKE

UQ UQ_ CIRCULATING WATER (COOLING)SYSTEM STRUCTURES: E.G.: CIRCULATING WATER PUMPS AND OUTFALL

US US_ STRUCTURES FOR ANCILLARY SYSTEMSUT STRUCTURES FOR AUXILIARY SYSTEMS

UTH Auxiliary boiler structures UY GENERAL SERVICE STRUCTURES (OFFICES, ACCESS

CONTROL) UYA Structure for Offices building UYF Structure for access control building

UZ UZ_ GENERAL STRUCTURES FOR TRANSPORT, TRAFFIC, FENCING, GARDENS AND OTHER PURPOSES

X HEAVY MACHINERY (NOT MAIN MACHINE SETS) XK GENERATOR PLANT

XKA Emergency LV power supply XKB Emergency MV power supply