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ELECTRICAL, INSTRUMENTATION & CONTROL INSTALLATIONSINSTALLATIONS
GENERIC CONSTRUCTION ACTIVITIES
‐V.C.AGRAWAL
CONTENTSCONTENTSELECTRICALEQUIPMENT AND PANEL ERECTION CABLE CARRIER SYSTEMSCABLINGEARTHINGEARTHINGFIRE SEALING
INSTRUMENTATIONINSTRUMENTATION
COTROL ROOM PANEL ERECTIONSUPPORTS FOR INSTRUMENTATION TUBESWIRE TERMINATIONTUBINGRECOMMENDED PRACTICESRECOMMENDED PRACTICES
GAS INSULATED 220 KV AND 400 KV SWITCH YARD BUILDINGS
S/Y CONTROL BUILDING AN OVERALL VIEW
220 KV GAS INSULATED SWITCHYARD ‐AN ADVANCEMENT BY MODULAR CONSTRUCTIONADVANCEMENT BY MODULAR CONSTRUCTION
400 KV GAS INSULATED SWITCHYARD‐ALL WEATHER PROTECTION AND MODULAR CONSTRUCTION
AUTOMATED HOT LINE WASHING
CONVENTIONAL‐MANUAL WASHING
CONSTRUCTION OPENING
STATION UNIT TRANSFORMER WITH SEGREGATED BUS DUCT
SWITCH GEAR INSTALLATION‐ ANINSTALLATION‐ AN ADVANCEMENT BY INSTALLATION IN MODULES IN CLEAN ROOM CONDITION
GENERATOR TRANSFORMER WITH ISOLATED PHASE BUS DUCT & FIRE WALL
CLOSE VIEW OF FIRE WALL IN TRANSFORMER AREA. EQUIPMENT POSITIONING BEHIND THE TURBINE BUILDING AWAY FROM THE SEA TO AVOID DIRECT SALINE ATTACK
TRANSFORMER WITH AUTOMATIC SPRINKLER SYSTEM
4x2720 KWe DGs- SKID MOUNTED EQUIPMENT
EMERGENCY POWER BATTERY SETS (2250 AMP‐HRS) ON SKID MOUNTED SEISMICALLY QUALIFIED SUPPORTS
6.6 KV SWITCH GEAR PANEL ERECTION IN MODULES
415 V SWITCH GEAR PANEL ERECTION IN MODULES
THE CABLE TRAY SUPPORTS WITH PRE‐DEFINED CANTILEVER ARRANGEMENT. INSTALLATION IN MODULES MINIMIZE TIME AND EFFORTS DRASTICALLY AND
INSTALLED IN PARALLEL TO THE CIVIL WORK.
CABLE CARRIER SYSTEM
POSITIVE CABLE SEALING WITH GLANDING AND HEAT SHRINKABLE SLEEVESAND HEAT SHRINKABLE SLEEVES
CAD WELDING FOR SPEEDIER EARTHING CONDUCTOR INSTALLATION
A TYPICAL VIEW OF EARTHING
A TYPICAL EARTHING CONNECTION FOR EQUIPMENT
FIRE ANDFIRE AND RADIATION SEALINGS AT FLOOR SLABS
FIRE AND RADIATION SEALING AT WALLSWALLS
MOSAIC GRID AND MOSAIC CONTROL TILE PANELS
TWO COLOUR CODE WIRING SYSTEM USED FOR EASE OF SEGREGATION AND IDENTIFICATION WITH EACH WIRE IDENTIFIED WITH FIVE DIGIT CODE
ADVANCEMENT IN HARDWARE & SOFTWARE IN SAFETY AND NON SAFETY RELATED CONTROL PANELS
PRE‐FABRICATED MODULES
TUBING WORKSTUBING WORKS
PRE‐FABRICATED TUBING MODULES
A LARGE PRE‐FABRICATED LOCAL CONTROL PANEL FOR STEAM SAMPLING
PRE‐DEFINED CORRIDOOR SYSTEM FOR TUBING FOR ZERO INTERFERENCE
LEFT IN SHUTTERS
USE OF PREFABRICATED PERFORATED CHANNEL TYPE FRAMES FOR INSTALLATION OF TUBING FOR INSTRUMENTATION AND CONTROL SYSTEMSAND CONTROL SYSTEMS IMPROVES QUALITY AND REDUCES ERECTION TIME
INSTRUMENT TUBES INSTALLATION IN MODULES REDUCE THE CONSTRUCTION TIME DRASTICALLYREDUCE THE CONSTRUCTION TIME DRASTICALLY.
Conventional Method• Each connection is threaded – requires numerous fittings – system not flexible or easynumerous fittings – system not flexible or easy to install and service connections not smooth inside – pockets obstruct flowinside pockets obstruct flow.
Advanced Method• Bendable tubing needs fewer fittings – no
threading required system light andthreading required – system light and compact – easy to install and service – no internal pockets or obstructions to free flow.
Major Advantage of Tubing over Piping System
• Improved BendingImproved Bending• Higher Strength
St li d Fl• Streamlined Flow• Minimum Pressure Drop• Economy of Space & Weight • Higher FlexibilityHigher Flexibility• Reduction in no. of Fittings
Major Advantage of Tubing over Piping System
• Improved Quality of Joints• Better Aesthetics• Better Aesthetics• Cleaner Fabrication• Easier Assembly and Disassembly• Improved Mean Maintenance Time
Type of Joints
• Butt Welds
Type of Joints
Butt Welds
• Socket Welds
h d d i• Threaded Joints
• Flared, Flaredless & Compression Joints.
Best Practices for Impulse Tubing llInstallation
• Sufficient separation required between redundant p qinstrument sensing lines
• Recommended minimum separation between d d t i li h ld b t l t 450redundant sensing lines should be at least 450 mm.
• Instrument sensing lines should run in a covered area/corridorarea/corridor
• Routing of instrument sensing lines should ensure that the lines are not subjected to vibrations, abnormal heat or stress
• Care should be taken to ensure that the tubing/piping does not rest on or against any abrasive surfacedoes not rest on or against any abrasive surface.
Best Practices for Impulse Tubing llInstallation
• Instrument sensing lines should be kept as short st u e t se s g es s ou d be ept as s o tas possible.
• Codal recommendations for instrument sensing glines, electrical transmission and pneumatic transmission lines shall be adopted.
• Instrument sensing lines should avoid hot environments or potential fire risk areaS i li h ld b l t d ith ffi i t• Sensing lines should be located with sufficient clearance to permit sagging.
Best Practices for Impulse Tubing llInstallation• Impulse lines especially in case of ∆P/flow measurements should
be kept as close as possible.
• There should be provision for thermal expansion and contraction
• The number of joints should be kept to a minimum
• Sensing lines should be adequately supported along its entire length
• Supports brackets clips or hangers shall not be fastened to theSupports, brackets, clips or hangers shall not be fastened to the instrument sensing lines
• Sensing lines should continuously slope downwards towards the sensing instruments in case of liquid and upwards in case of gases
• Bends are always preferred over tube fittings
• Sharp bends should be avoided• Sharp bends should be avoided.
Best Practices for Impulse Tubing llInstallation
• Minimum bending radius should be 3DMinimum bending radius should be 3D
• Sensing lines of differential temperature should be avoided to run togethershould be avoided to run together
• Each line and associated valves should be l id ifi dproperly identified
• Sensing lines should be well protected while penetrating the areas for radiation sealing , fire sealing etc.
Best Practices for Impulse Tubing llInstallation
• Codal requirements w r t thermal expansionCodal requirements w.r.t. thermal expansion, seismic motions , vibrations and design events or accidents shall be considered while finalizing glayout
• Flexible hose may be used in sensing lines toFlexible hose may be used in sensing lines to accommodate the process thermal requirements, seismic and vibration movements
• Tube cleaning and handling procedure should be finalized before start of erection work
TYPES OF TUBE FITTINGS
Table below
Table
DOUBLE COMPRESSION TUBE FITTING
ACCURATE MEASUREMENT COUPLED WITH EXACTCOUPLED WITH EXACT ANGLES RESULTS IN A TUBE LINE THAT WILL FIT AT POINT A‐D
SS ADVANCED TUBE FITTINGSSS ADVANCED TUBE FITTINGS PRIOR TO MAKE UP
Standard enclosed orbital weld heads