ERECTION SEQUENCE AND PLAN FOR GENERATOR PART-I ABC OF THERMAL POWER PLANT.

-Foundation Checks  to be carried out. Generally this was done with turbine foundation checks.

- Installing the Foundation Beams and the Sole Plates

-Checking of  High-Voltage Bushings and the Current Transformers for  healthiness.

-Positioning of Terminal Box before generator lifting .

-Lower the Generator Frame on Supports after lifting either by EOT crane/ some other method.

-Assembling of Terminal Box, External Seal Welding, Leak Test

-Mounting of Cooling Header, External Seal Welding, Leak Test

-Lower Generator and Perform Preliminary Alignment with the help of jacks .

-Aligning the Foundation Beams with and Bolting them to the Generator

-Installation of Alignment Brackets

-Installing the Primary Water Tank on the top of the generator.

-Installing the Current Connectors

-Prepare the Bottom-Half End Shield Bearings

-Preparing of Rotor for Installation

-Installation of Rotor

-Mounting of Bottom-Half End Shield Bearing, Emplacement of the Rotor

-Lay Rotor Axial to the Generator Frame

-Installation of Air-Gap Seal

-Installation of External Current Connectors (Beginning)

-Alignment of Generator for Release for External Connections

-Measuring the Bearing Clearances

-Pre-assembling of Inner Oil Wipers

-Recording the Dimensional Data of the Seal Ring and the Seal Ring Holder

-Mounting of Compressor

-Mounting the End Shield Bearing Top Halves

-Installation of Inner Oil Wipers

-Alignment of Compressor

-Aligning the Generator and Turbine Couplings

-Grouting of Foundation Beams

-Installation of Gas Distribution System

-Mounting of H2 Cooler

-Final Inspection of the Generator Interior and Mounting the Manhole Covers

-Tensioning of Foundation Anchor Bolts

-Preparation of the Bearing and Seal Oil Systems for Flushing

-Checking Instrumentation and Commissioning Seal Oil System (Beginning)

-Filling the End Shield Bearing Seal Grooves

-Installation of H2 Shaft Seal

-Generator - Leakage Test (Air)

-Final Alignment of Generator to Turbine

-Closing of Bearing Chambers

-Handover of Customer Tools, Winding Up Assembly Site

-Preparation of Exciter Foundation

-Preassembling of the exciter base plate

-Alignment Of the Exciter Coupling to the Generator Coupling

-Grouting the exciter base plate and tensioning of the anchor bolts

-Couple the Exciter shaft and swing check

-Final assembling of the exciter

-Following interface activities to be released as inputs for other system to connect.

-Release for the Oil Line Connection to the End Shield Bearings

( 10 to 12 weeks from start)

-Release for Primary Water Line Connections

( 10 to 12 weeks from start)

-Release for Installing the Foundation Cover

( 14 to 15 weeks from start)

-Release for Cooling Water Line Connections (H2 Cooler)

(16 to 17 weeks from start)

-Release for Bus Bar Interface at the Terminal Bushings

( 21 to 22 weeks from start)

-Release for Connection of Piping to the Exciter Bearing

(24 to 25 weeks from start)

-Release for Cooling Water Line Connection to the Exciter Coolers

(28 weeks from start)

-Release for Coupling of the Steam Turbine 

(28 weeks from start)

The total work is planned for 28weeks to 30th week depending on availability

of materials , civil fronts , availability of EOT crane and other aspects of site.

Out of the above activities one activity is extremely critical considering erection 

angle i.e rotor threading to Generator stator. This require pre-planning of 

material ,manpower and T&P with utmost care.  The same will be described

in PART_II through pictures.

Please observe ceiling protection , support on pedestal etc.