-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.
