ALPHA GENERATOR MAINTENANCE MANUAL · GE Energy Power Conversion Author : Vellingiri, Radhakrishnan...

GE Energy Power Conversion

Author : Vellingiri, Radhakrishnan DocRef : File : Maintenance Schedule Checklist for Alpha Generators.docx ©COPYRIGHT 2014 GE ENERGY (USA), LLC AND/OR ITS AFFILIATES. All rights reserved. GE Energy Proprietary Technical Information

CLASS II (GE INTERNAL NON-CRITICAL)

Revision : 000 Date : 2017-01-02 Page : 1/23

EXTERNAL REPORT

ON

ALPHA GENERATOR MAINTENANCE MANUAL

Change Number: Change Number Author: Vellingiri, Radhakrishnan Design Office: Reason for new issue: Initial Issue ©COPYRIGHT 2014 GE ENERGY (USA), LLC AND/OR ITS AFFILIATES. All rights reserved. The information contained herein is GE Energy Power Conversion Proprietary Technical Information that belongs to the General Electric Company, GE Energy (USA), LLC and/or their affiliates, which has been provided solely for the express reason of restricted private use. All persons, firms, or corporations who receive such information shall be deemed by the act of their receiving the same to have agreed to make no duplication, or other disclosure, or use whatsoever for any, or all such information except as expressly authorized in writing by the General Electric Company, GE Energy (USA), LLC and/or its affiliates.





CONTENTS

1. INTRODUCTION .............................................................................................................................................. 3

1.1 TYPICAL ALPHA MACHINE DIAGRAM ....................................................................................................................... 4

2. SAFETY INSTRUCTIONS ................................................................................................................................. 4

3. EQUIPMENT DATA .......................................................................................................................................... 7

4. SCHEDULE FOR MAINTENANCE ................................................................................................................... 8

4.1 VISUAL INSPECTION (CUSTOMER MAINTENANCE) ............................................................................................ 8 4.2 TORQUE SETTING FOR JOINTS ................................................................................................................................... 9 4.3 CLEANING ............................................................................................................................................................................ 9 4.4 WINDINGS TEST ................................................................................................................................................................ 9 4.4.1 INSULATION IR TESTING (IR) ....................................................................................................................................... 9 4.4.2 STATOR IR TEST ............................................................................................................................................................. 10 4.4.4 POLARISATION INDEX ................................................................................................................................................ 10

4.4.5 Rotor Circuit IR tests ........................................................................................................................................... 10 4.4.6 Exciter Field and PMG Stator IR Tests ........................................................................................................ 10

4.5 STATOR AND ROTOR AIRGAP MAINTENANCE TEST ....................................................................................... 10 4.6 BEARING INSULATION TEST ...................................................................................................................................... 11

4.6.1 To Check the Bearing Insulation on a Stationary Machine: ............................................................. 11 4.6.2 To Check the Bearing Insulation on a Running Machine: ................................................................. 11

4.7 EXCITER AND PMG AIRGAP MAINTENANCE TEST ........................................................................................... 11 4.8 COOLER MAINTENANCE CHECK- CACW (IC8A1W7) ...................................................................................... 12 4.9 CHECKING THE TIGHTNESS OF THE HIGH VOLTAGE CONNECTIONS ................................................... 12

5. MAINTENANCE SCHEDULE ......................................................................................................................... 14

6. RECOMMENDED TOOLS .............................................................................................................................. 15

7. GLOSSARY...................................................................................................................................................... 16

8. APPENDIX A - MAINTENANCE REPORT ..................................................................................................... 17

9. APPENDIX B – ESTIMATED HOURS ............................................................................................................ 21

10. EMERGENCY CONTACT DETAILS ............................................................................................................... 22

11. MODIFICATION RECORD ............................................................................................................................. 23





1. INTRODUCTION

This document summarises the scope of scheduled maintenance work to be carried for Alpha Generators

for the specification mentioned below ,

GENERAL INSTRUCTION

Machines in the Alpha range are of box frame, salient-pole construction with brushless excitation and a PMG

for the AVR power supply.

All the items making up an Alpha machine are fixed to the box frame, which is the main structural member.

It carries the end brackets and bearings, the stator core pack, with a cooler mounted on the top. The exciter

and PMG stators are fixed to a bracket mounted on the end bracket at the non-drive end (NDE). Terminals

are mounted off the frame, either all on one side or lines one side and neutrals on the other, as required.

Accommodation for current transformers may be provided.

Alignment of the various components of the machine is achieved in the factory by accurate machining of

the spigots by which the components are located. This alignment is meant to last for the life of the machine

and no adjustment is possible. Alignment of the exciter stator and the PMG stator to give the correct airgaps

is by shims under the stator feet.

ALPHA Range

Output Range 5000 TO 75,000 ( up to 60MW 0.8p.f)

Voltage up to 15,000 V

Frequency 50 Hz or 60 Hz

Cooling Air or Water cooled (CACA or CACW)

No of Poles 4





The box frame has four mounting feet suitable for bolting and doweling to the structure on which the

machine is to be mounted.

1.1 TYPICAL ALPHA MACHINE DIAGRAM

Fig 1: Alpha Generator

2. SAFETY INSTRUCTIONS

To prevent accidents, the safety measures and devices implemented must be compliant with the

regulations applicable at the place of work. All rules and regulations applicable in the country of use, safety

rules specific to the site, instructions given in this manual and specific safety instructions supplied with the

machine must be strictly adhered to.

When working on the machine, the following safety warnings should be adhered to:

WARNING

TAKING THE APPROPRIATE ACTIONS TO ENSURE THAT SITE PERSONNEL WHO ARE PERFORMING INSTALLATION, COMMISSIONING AND MAINTENANCE HAVE BEEN TRAINED IN PROPER SITE PROCEDURES FOR WORKING WITH AND AROUND GE SUPPLIED EQUIPMENT PER SAFE SITE WORK PRACTICES ARE THE END USERS RESPONSIBILITY.





WARNING

PRIOR TO STARTING THE MACHINE, ENSURE THAT ALL TEMPORARY FITTINGS ARE REMOVED TO PREVENT DAMAGE TO THE MACHINE OCCURRING.

WARNING

BEFORE STARTING ANY MAINTENANCE, WORK ENSURE THAT ALL ELECTRICAL CIRCUITS TO THE MOTOR ARE SWITCHED OFF WITH ISOLATORS, CIRCUIT BREAKERS LOCKED IN THE OPEN (OFF) POSITION.

WARNING

PROPER LOCKOUT/TAGOUT OF ENERGY SOURCES PRIOR TO MAINTENANCE PER SAFE SITE WORK PRACTICES IS THE END USERS RESPONSIBILITY.

WARNING

VERIFYING PROPER GROUNDING OF SKIDS / EQUIPMENT TO PLANT GROUNDING SYSTEM IS THE END USERS RESPONSIBILITY.

WARNING

PROPER LIFTING TECHNIQUES / EQUIPMENT / PROCEDURES PER SAFE SITE WORK PRACTICES ARE THE END USERS RESPONSIBILITY.

WARNING

PROPER LOCKOUT/TAGOUT OF ENERGY SOURCES PRIOR TO MAINTENANCE PER SAFE SITE WORK PRACTICES IS THE END USERS RESPONSIBILITY.

CAUTION

Ensuring proper Personal Protective Equipment is available and used is the end users responsibility.

CAUTION

Implementation of a hearing conservation program to ensure personnel are not exposed to high noise levels, per Safe Site Work Practices are the end users responsibility.





CAUTION

Proper housekeeping to maintain work environment free of slip / trail / fall hazards per Safe Site Work Practices are the end users responsibility.

CAUTION

Ensuring the equipment is returned to proper condition and all temporary tools, tooling and materials are properly removed from the machine after maintenance work is the end users responsibility.

Symbol Key

Electrical hazards

Ground connection point

KEEP AWAY

Stay at a safe distance

EC protection marking relative to an explosive atmosphere

The information and instructions relating to safety given above must be strictly observed at all times. Further safety requirements specific to the operating environment and country must also be adhered to.





3. EQUIPMENT DATA

Machine

AC Machine frame size and poles

Serial Number

Specification

Year of Manufacture

Rating (kVA)

Voltage (V)

Frequency (Hz)

Rated power factor

Rated line current (Amps)

Speed (rev/min)

Enclosure IP

Cooling Type

Cooling IC

Airgap (mm)

Rotor Type

Rotor Telemetry Equipment

Machine Mounting

Terminal Type

Winding resistance at 75oC

Stator (Ω/phase)

Rotor (Ω)

Bearings

Type DE :

NDE :

Make RENK

Size DE :

NDE :

Float (mm) DE : None

NDE : None

Exciter

Exciter Type

Frame size

Rotating armature resistance at 20oC between terminals (Ω)

Field resistance at 20oC (Ω)

Airgap (mm)

Excitation for:

Rated full load on the machine (A)

Rated voltage on no-load (A)

Rectifier diode references and quantities

PMG for AVR power supply

Frame size

Open Circuit Output voltage (V)

Full Load Current (A)

Frequency (Hz)

GA Drawing reference





Schematic connection diagram reference

Automatic voltage regulator (AVR)

Make

Type -

Generator Noise Level

Mean Sound Pressure Level measured at 1 metre from the machine surface (dB(A))

4. SCHEDULE FOR MAINTENANCE

It is important that a system of regular maintenance is adopted to ensure the efficient operation of the machine. The frequency with which maintenance should be done can only be decided from consideration of the site conditions and the protection grade (IP number) of the machine. Dirty conditions with an open machine will need more frequent inspection and cleaning than a closed-circuit machine in a clean environment. Machines should not be dismantled more often than necessary. It may be possible under good conditions to reduce the frequency of inside inspection and cleaning to once every five years. It is undesirable for the interval to be longer.

4.1 VISUAL INSPECTION (CUSTOMER MAINTENANCE)

Inspection of the machine at standstill should be made at intervals of approximately three months if the machine is in use daily. At each inspection:

i) Check for excessive vibration.

ii) Check all visible fixings and bolts, including those holding the cover to the baseplate, the cooler to the cover (if any) and the exciter cover to the base.

iii) Check the bearing temperatures and oil levels. If the bearings are supplied with oil from the prime mover system, check the oil flow.

iv) Look for leakage of oil from the bearings along the shaft. Clean around the bearing area and if the machine has cartridge-mounted bearings, clean around the bearing insulation at the cartridge feet.

v) Check the winding temperatures. Check the cooling air temperatures in and out.

vi) Check the water flow to the cooler.

vii) If the machine has a CACW cooler, look for signs of leakage at the pipe joints of the CACW cooler. If there are emergency doors, open them and look inside with a light for signs of leaks.

viii) If the machine is duct-ventilated, check the condition of the filters.





Note:

All remaining maintenance schedules are carried out by a GE representative for safety reasons and to ensure full compliance with recommended maintenance routines.

The GE representative shall have access to a detailed maintenance procedure to be followed for each line of preventative maintenance. Below is a brief overview of the schedules to be followed

Customer support is required to ensure full and safe access is allowed.

4.2 TORQUE SETTING FOR JOINTS

Experience shows in Generator vibration, hogging and sagging motions can have an effect on electrical

joints. This procedure will ensure recommended settings are maintained.

4.3 CLEANING

Adherence to this basic Maintenance procedure will ensure the life of the Generator is maintained to its

designed lifecycle.

4.4 WINDINGS TEST

The Insulation Resistance Test measures the integrity of the generator's winding insulation, and therefore

the likelihood of developing a ground. A test voltage is applied to the generator and the current flow

required maintaining that voltage is measured over a period of time

4.4.1 INSULATION IR TESTING (IR)

Insulation resistance testing puts a qualitative value on the condition of conductor insulation and the

internal insulation of different pieces of electrical equipment. As an insulation resistance test begins, apply

a direct current (dc) voltage to the conductor or equipment under test. Some current flows out of the test

equipment into the conductor and begins to charge the insulation. This current is called capacitive charging

current and can be observed on the meter face.

Testing the integrity of insulation requires measuring its resistance to current flow across it. A high level of

resistance means that very little current is escaping through the insulation. Conversely, a low level of

resistance indicates a significant amount of current may be leaking through and along the insulation.

As the charging current first begins to build, the resistance reading on the meter face will indicate a low

value. Think of this as electrons beginning to flow into and become stored in the insulation itself. The more

current that flows out of the test set, the lower the megohm reading. The insulation becomes charged

quickly and the meter indication will begin to settle out at a higher megohm value—provided the quality of

the insulation is good!





4.4.2 STATOR IR TEST

In Stator Excessive heat or cold, moisture, vibration, dirt, oil, and corrosive vapors can all contribute to

deterioration. For this reason, routine insulation testing in Stator is necessary.

However, testing can help you determine whether the insulation is performing at an effective and safe

level. Routine testing can identify problems before they result in injury or Stator equipment failure.

If the Stator insulation resistance is less than the calculated minimum resistance, clean and dry the Stator.

Then, repeat the test. If resistance is still low, replace the Stator.

Insulation Test is subject to many elements that can cause it to perform at a less-than-acceptable level.

See the table for recommendations of the International Electrical Testing Association . Make sure you

choose an insulation resistance tester that will supply the needed output test voltage.

4.4.4 POLARISATION INDEX

A Polarization Index (PI) test is generally performed at the same voltage as the Insulation Resistance (IR)

test. Where the IR test is performed for a period of one minute, the PI test is performed over a period of ten

minutes. This gives the absorption (polarization) current ample time to decay, and reveals a more detailed

indication of the total leakage and conduction current. As such, PI is a good indication of winding

contamination, moisture ingress (leakage currents), and/or bulk insulation damage (conduction currents).

Polarization Index testing is generally performed with an Insulation Resistance (IR) test set (commonly

known as a Megger. PI results for suitability for service or implementation of high voltage testing is widely

accepted as 2:1 or greater. Any reading lower than this minimum value is a concern. The windings would

be presumed to be wet, contaminated, and/or compromised in some fashion. Conversely, vintage windings

(varnish cambric, asphalt mica, etc.) may produce an unusually high Polarization Index ratio. The insulation

may be void of binder content, thus making it dry and brittle. If the polarization Index is reduced because

of dirt or excessive moisture, it can be brought up to a satisfactory value by cleaning and drying to remove

moisture

4.4.5 ROTOR CIRCUIT IR TESTS

If an insulation breakdown is indicated, clean and dry the Rotor then repeat the test. Replace the Rotor if it

Fails the second test (after cleaning and drying)

4.4.6 EXCITER FIELD AND PMG STATOR IR TESTS

Insulation resistance of a clean and dry winding with secure insulation will change dramatically over the life of the unit. Insulation resistance will start at a high value. drop to 10 to 100 times the minimum value over the first year of service, and then slowly decline until the end of service life is reached.

4.5 STATOR AND ROTOR AIRGAP MAINTENANCE TEST

Stator and Rotor airgap maintenance test conducted periodic to gained results in increased levels of vibration due to the uneven magnetic pull it creates between the circumference of the rotor and stator bore. Over time, these elevated levels of vibration can result in excessive movement of the stator winding, which could lead to increased friction and eventually a turn-to-turn, coil-to-coil, or ground fault. Increases in

http://www.netaworld.org/





mechanical vibration accelerate bearing failure, which could seize the shaft and overheat the windings or allow additional movement of the shaft leading to a rotor/stator rub. The uneven magnetic stresses applied to the rotor, coupled with the increased vibration, will also contribute to mechanical looseness developing in the rotor assembly. Risk of rotor pull-over increases exponentially with the amount of air gap eccentricity.

4.6 BEARING INSULATION TEST

Insulated bearings that can be used for turbine generators. Tests conducted under various operating conditions showed high insulation levels of ceramic layers. e, indicating that thermal conduction was sufficient and rotation performance was satisfactory. This newly developed bearing will provide sufficient prevention of electric corrosion in most applications

4.6.1 To Check the Bearing Insulation on a Stationary Machine:

A test was conducted to check the effects of temperature and humidity on the insulation performance. Typical environmental conditions were used during this test.

4.6.2 To Check the Bearing Insulation on a Running Machine:

The integrity of the NDE bearing insulation may be checked when the machine is running by using a MultiMate or similar instrument to measure the voltage appearing between the rotating shaft adjacent to the NDE bearing and a convenient earth point, e.g. a fixing bolt. This potential varies from machine to machine and with load, so the absence of a potential difference does not necessarily mean that the insulation has failed. On the other hand, the presence of a potential difference confirms that the bearing insulation is in good order.

4.7 EXCITER AND PMG AIRGAP MAINTENANCE TEST

The exciter stator is mounted on an extension of the NDE end box. When the machine was built, the airgap was set by shimming the stator and doweling it in position. There should be no variation over the life of the machine.

The airgaps of the exciter and PMG are small, typically 1.5mm, and the powerful magnets of the PMG rotor will attract any metallic dust that comes near them. When blowing and brushing out the exciter, it is prudent to keep the PMG covered.

NOTE

Note also that the PMG airgap can only be checked with a non-magnetic feeler gauge.

The difference between the maximum and minimum measured airgaps on either the exciter or the PMG should not be more than 10% of the nominal gap.

If the PMG gap is seen to have particles adhering to the magnets, try to push them out with a piece of plastic. If contamination is severe, it will be necessary to slide the PMG stator out of the way while the rotor is cleaned. This will require considerable force. When sliding the stator back, take care not to trap fingers in the gap. Check the gap after the stator is replaced.





4.8 COOLER MAINTENANCE CHECK- CACW (IC8A1W7)

Check that the water pipework to the cooler is properly supported so that no significant loads are put on the cooler stub pipes. If the machine is flexibly mounted there must be a flexible section in each pipe. If work has been done on other equipment close to the machine, check that the pipework supports have not been removed in the course of that work.

Check that the water supplied to the cooler is free of sand and other particles. If there is a filter, check that it is cleaned regularly. If sacrificial anodes are fitted in the system, check that they are renewed as necessary to keep them effective.

Check that the water flow is close to the design level, as quoted on the nameplate and the general arrangement drawing. If the quoted flow is exceeded there will be no significant improvement in cooler performance and erosion of the tube ends may occur but the performance of the cooler will not be significantly improved.

If the location is cold, the water supply should contain an appropriate percentage of glycol to prevent freezing, particularly if the cooler is out of use for periods of time, for example, at night.

All joints should be inspected regularly for leaks and any that occur should be cured as the opportunity arises. The water leakage detector will detect leaks within the cooler so make sure this is functioning correctly.

If there are siphon drains, keep the U-bends full of water to prevent insects getting in. This is particularly important in tropical countries.

4.9 CHECKING THE TIGHTNESS OF THE HIGH VOLTAGE CONNECTIONS

The voltage transformer cap screws and connection nuts should be checked as follows.

Voltage Transformer Cap Screws:

There are three cross-head screws holding the cap onto the voltage transformer. The security of these screws should be checked as follows, as seen in Figure 2-1.

Figure 2-1: VT Cap Screws

i) Tighten all three cap screws on each voltage transformers phase (9 screws in total per machine) using a torque screwdriver set at 1.9Nm (1.4 lb-ft).





NOTE

Connections to the voltage transformer primary may be via solid copper strip or cable connections. The photograph shows solid strip connections

Figure 1-2: VT High Voltage Connections

The high voltage connections are secured to the voltage transformer using brass nuts as shown in Figure 1-2.

ii) Tighten the two inner brass nuts on the threaded screw on the end of the voltage transformer

to a torque of 3Nm (2.2 lb-ft) each.

iii) Tighten the two outer brass nuts on the threaded screw on the end of the voltage transformer to a torque of 3Nm (2.2 lb-ft) each.

NOTE

Tighten the nut adjacent to the connection strip first





5. MAINTENANCE SCHEDULE

S.No TASK DESCRIPTION REF

Section 3MONTH ( NO

DISMANTLING) ANNUALLY 5 YRS PERSONNEL

1. Visual Inspection Sec 4.1 ✓ CUSTOMER

2. Torque settings for Joints

Sec 4.2 ✓ GE

3. Cleaning Sec 4.3 ✓ GE

4. Windings Test Sec 4.4 ✓ GE

5. Stator and Rotor airgap Test

Sec 4.5 ✓ GE

6. Bearing Insulation Test

Sec 4.6 ✓ GE

7. Exciter and PMG airgap Test

Sec 4.7 ✓ GE

8. Cooler Test Sec 4.8 ✓ GE

9. Checking high voltage connections (VT & CT)

Sec 4.9 ✓ GE





6. RECOMMENDED TOOLS

i) Megger

ii) Torque Wrench set

iii) Screw driver Minus/Star

iv) Spanner sets from 7 mm to 64 mm

v) Precision screw driver set

vi) Adjustable spanner/Cutting Plier

vii) Crimping tool/Wire stripper

viii) Multimeter





7. GLOSSARY

AC Alternating Current

AVR Automatic Voltage Regulator

C of G Centre of Gravity

CACA Closed Air Circuit, Air cooled

CACW Closed Air Circuit, Water cooled

CT Current Transformer

DC Direct Current

DE Drive End

ETD Embedded Temperature Detector

GA General Arrangement

IC International Cooling Code

IP International Protection Code

IR Insulation Resistance

NDE Non-Drive End

PI Polarisation Index

PMG Permanent Magnet Generator

R1 Resistance after 1 minute

R10 Resistance after 10 minutes

RTD Resistance Temperature Detector

RTE Rotor Telemetry Equipment

VT Voltage Transformer





8. APPENDIX A - MAINTENANCE REPORT

1. Customer name : _________________________________________________________

2. Job name : _________________________________________________________

3. Order number : _________________________________________________________

4. Maintenance carried by : _________________________________________________________

5. Department : _________________________________________________________

6. Maintenance start date : _________________________________________________________

7. Maintenance End date : _________________________________________________________

8. Site in-charge / Reporter : _________________________________________________________

S.No TASK DESCRIPTION COMMENTS

(Include actions completed, observations and any follow-on recommendations)

INITIALS DATE

DD/MM/YY

1

VISUAL INSPECTION





2

TORQUE SETTINGS FOR JOINTS

3

CLEANING

4

WINDINGS TEST

5

STATOR AND ROTOR AIRGAP TEST

6

BEARING INSULATION TEST

7

EXCITER AND PMG AIRGAP TEST





8

Cooler Test

9

Checking high voltage connections (VT & CT)





Site Engineer Report

Guidance – Ensure all Maintenance Schedules completed are recorded; if any schedules could not be completed record the reasons for future record. Capture any observations and recommendations for follow-up actions and priority of that action. Include any Client/Customer Comments I.e. immediate or next routine visit.

_________________________________________________________ _________________________________________________________

_________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________ _________________________________________________________

_________________________________________________________ _________________________________________________________

Site Engineer Name Signature Date

_________________________________________________________ _________________________________________________________

Client/Customer Name Signature Date





9. APPENDIX B – ESTIMATED HOURS

S.No TASK DESCRIPTION REF

Section MONTHLY ANNUALLY

5 YRS

PERSONNEL Actual Time

taken Comments/Observations

1. Visual Inspection Sec 4.1 Customer

2. Torque settings for Joints Sec 4.2 GE

3. Cleaning Sec 4.3 GE

4. Windings Test Sec 4.4 GE

5. Stator and Rotor airgap Test Sec 4.5 GE

6. Bearing Insulation Test Sec 4.6 GE

7. Exciter and PMG airgap Test Sec 4.7

8. Cooler Test Sec 4.8 GE

9. Checking high voltage connections (VT & CT)

Sec 4.9 GE

10. Total Customer Estimated Time Customer

11. Total GE Estimated Time GE

12. Overall time 00 Hrs

Note: Service Engineers are to complete the actual time taken to complete each schedule, ensure you include time to complete Permits to Work and Lock-Out Tag-Out routines





10. EMERGENCY CONTACT DETAILS

If any machine failure or problem occurred during normal operation or maintenance work please contact any one of the below GE operated offices

Brazil GE Power Conversion Av. Álvares Cabral, 1345 Bairro Lourdes, Belo Horizonte Minas Gerais, 30170-001 Tel: +55 31 3330 5800

India GE Power Conversion Unit No 1003, Tower B, 10th Floor Millennium Plaza, sector 27 Gurgaon, 122 002 Haryana Tel: +91 124 4200190

China GE Power Conversion 29F, Building A, Lane 58, East Xinjian Road, Minhang District 201100 Shanghai Tel: +86 21 641 46080

Russia GE Power Conversion Majorov pereulok, 14 Bldg.7 105023 Moscow Tel: +7 495 225-19-16

France GE Power Conversion 1, Square John H. Patterson 91345 Massy Cedex Tel: +33 (0) 1 77 31 20 00

UK GE Power Conversion Boughton Road Rugby, Warwickshire CV21 1BU Tel: +44 (0) 1788 563 563

Germany GE Power Conversion Culemeyerstraße 1 12277 Berlin Tel: +49 (0) 30 7622 – 0

USA GE Power Conversion 610 Epsilon Drive Pittsburgh, PA 15238 Tel: +1 412 967 0765





11. MODIFICATION RECORD

Revision Date Author Details

000 2017-01-02 Vellingiri, Radhakrishnan Initial Issue

ALPHA GENERATOR MAINTENANCE MANUAL · GE Energy Power Conversion Author : Vellingiri, Radhakrishnan...

Documents

Transcript of ALPHA GENERATOR MAINTENANCE MANUAL · GE Energy Power Conversion Author : Vellingiri, Radhakrishnan...