Final Site Test

Generator Site Test

1 Surge comparison test

Surge comparison test is used to determine

condition of inter turn insulation of the stator

winding.

Yespulse transformer for impulse voltage and

an oscilloscopeDuring Overhauling

TDPS / Turbo Generator/India

Electrical Works/Gujrat Turbo/Pioneer

Generator/PENTAGON TURBINES (P)

LTD /POWER GEM ENGINEERS

2Check the contamination of

respective parts

To check the deposit of moisture and dust on

surfaceYes Visual Inspection and hand touch During Overhauling

Yes

3 Dry penetration Test

Test provides an indication of presence of cracks,

contamination and moisture in the insulation IR/PI

test between slip rings and the body is carried out

to check the integrity of the pole sleeve insulation

of the rotor

Yes

alkaline, solvent-removable, lipophilic post-

emulsification, or hydrophilic post-

emulsifiable ,aerosol spray cans, and may

employ acetone, isopropyl alcohol, or a

propellant.

During Overhauling

4 ELCID Test on Stator coredetection of faults in core inter lamination

insulation by electromagneticYes ELCID Evaluation Tester During Overhauling

5 Slot wedge test To check the looseness of winding wedges Yes Visual Inspection and Rubber hammer. During Overhauling

6 Magnetic shunt detection Yes - During Overhauling

7 Coil insulation tests To check the Insulation level of the winding Yes - During Overhauling Yes

8 Condition of bearings & shaft To check the condition f bearing and shaft of

generatorYes Visual Inspection. During Overhauling Yes

9Off line Rotor Winding Inter

turn Fault DetectionShorted Turn Detection For Generator Rotor Yes RSO ( Recurrent Surge Oscilloscope) During Overhauling





10 Bearing insulation resistance Yes Digital Meggar During Overhauling Yes IS 7132

11Measurement of Air Gap

between Stator and RotorYes Air Gap Gauge During Overhauling



Generator/PENTAGON

TURBINES (P) LTD /POWER

GEM ENGINEERS

12 High Voltage Dielectric Test YesCommissioning

Test

13

Open Circuit Test or No-Load

Saturation Test Measurement of losses Yes -Commissioning

Test

14

No load and short circuit

saturation curve and Short

Circuit ratio

Measurement of losses Yes -Commissioning

Test

IS 5422, IS

7132

15 Dielectric test(tan delta) To determine the dielectric strength of generator Yes Ten Delta Test Kit 3Y IS 5422

16 Off line Partial Discharge test

Partial discharge test is a diagnostic test for HV

machines as it is capable of revealing incipient

faults in the stator winding structure.

YesPD Detector, High Voltage

Capacitor,Oscilloscope.3Y



Generator/PENTAGON

TURBINES (P) LTD /POWER

GEM ENGINEERS













IS 5422, IS

7132

External Party Internally

Capable

IS

standard





S. No. Test Purpose of test Site Test Instrument Req. Freq.

Page 1

Generator Site Test

17DC leakage current

measurement

Measurement of leakage current by applying DC

voltage in steps is frequently used to indicate the

status of the stator winding.

Yes DC Voltage generator,clock,and meggar. 3Y

18 Maintenance of Sleeve bearingTo ensure that sleeve bearing not have unilateral

contact.Yes

by checking visual inspection and hand

touch oil clearance must be measured

using lead wire

3Y Yes

19 Shaft Voltage measurementActual Shaft Voltage measurement

Yes voltage sensor for detecting shaft voltage Y Yes IS 7132

20Vibration measurement on

bearing housingUnbalancing bearing condition etc.

Yes Vibration Meter Y Yes IS 5422

21 Insulation Resistance testTo measure the insulation resistance of the

winding of generatorYes Digital Meggar and Milli ohms meter HY Yes IS 5422

22 Winding Resistance To measure the resistance of generator winding Yes Milli ohms meter HY Yes IS 5422

23 PI test To check the Insulation level of the winding Yes Digital Meggar HY Yes IS 5422

24Checking of Rotor Rectifier

AssemblyTo check the working of rectifier assembly Yes

Tester/Multi meter for check the continuity

of diode, Spanner and screwdriverHY Yes

25 Loose fit of bolt. Check the Tightness of the bolt Yes Spanner and screwdriver M Yes

26Temperature of respective

parts

Temp. rise limit not be exceed In case the temp.

rises gradually despite running at constant load,

caution is required.

YesRTD(for Cont. monitoring), Thermo

cameraFN Yes

27 Oil Leakage TestTo Check the Oil Leakage from any parts of the

generatorYes Visual Inspection D Yes

28 Lubricating condition

Oil flow should indicate no change form that at

normal time, to check the air foam in the oil, and

check the oil level.

YesVisual Inspection of inspection lid, looking

in to flow sight and oil level gouge.D Yes

29 Abnormal odor from main bodyThere should be no abnormal odor compared to

that at normal timesYes Resort of sense of smelling D Yes





Page 2

Transformer Site test

1 Magnetic balance test

This test is done to find out the condition of stacking

of core laminations, tightness of core bolts and

perfection of magnetic circuit

Yessingle phase

supply,voltmeter,lamp

During Overhauling

/ Internal faultYes

2Measurement of Magnetizing

current

The magnetizing current is measured to test any

fault in the magnetic circuit and windingYes

balanced three phase

415V ac supply ,AC

Ammeter

During Overhauling

/ Internal faultYes

3

Measurement of zero

sequence impedance of 3-

phase transformers.

To measure Zero phase sequence impedance YesDuring Overhauling

/ Internal fault

4 Short circuit Current test. This test is carried out as a check for any loose contact in

the tap changer, lead connections etcYes

During Overhauling

/ Internal fault

I.S2026(Part

I)

5check' of voltage vector

relationship

to check vector symbol (To ascertain phase

displacement)Yes 415 V supply

Commissioning

/During

Overhauling /

Internal fault

Volt Amp / Elsytes Control

/India Electrical Works

/Power Gem

Engineer/New Delhi Lab

I.S2026

6

Measurement of impedance

voltage/ short-circuit

impedance (principal tapping)

and load loss.

To measure losses occurring at rated load , including

I2R loss and stray loss and measured voltage

required to circulate rated current through one

winding when the other winding is short-circuited

Yes variable voltage sourceCommissioning

Test



/Power Gem


[IS 2026

(part I):1977

7Measurement of winding

resistance.To measure resistance of transformer winding Yes

Digital Meggar and Milli

ohms meter3Y Yes

IS 2026 (part

I):1977

8 Ten Delta test.

To determine ratio of the power dissipated in the

insulation in watts to the product of the effective

voltage and current in volt-amperes when test under

a sinusoidal voltage

Yes Ten Delta Test Kit 3Y



/Power Gem Engineer

9Measurement of voltage

ratioTo know correct voltage ratio at each tap. Yes

415 V supply , Voltage

measuring Instrument3Y Yes I.S2026

10 Polarization Index Test. Polarization Index Test. Yes Digital Meggar Y Yes[IS 2026

(part I):1977

11 PPA test.To Determine contamination of the oil with particle of

matter.Yes Y New Delhi Labs/ERDA

12 Leakage test Check leakage of tank Yes Y New Delhi Labs/ERDA13 Sludge test Point Check Dissolved Contamination Yes Y New Delhi Labs/ERDA

14Neutralization Number ( Acid

Number )

This tests measures the amount of acids that are

contained in the oil.Yes Y New Delhi Labs/ERDA

IS1448

PART2

15 Interracial Tension testThis test measure the ability of oil to resist the

absorption of moisture in to the oil molecule.Yes Y New Delhi Labs/ERDA IS 6104

16Capacitance and PF / Dissipation

factor

To Estimate the deterioration of the insulation

contamination and physical damage.Yes Y New Delhi Labs/ERDA

17 Karl Fisher test

The Karl Fisher test measures the exact amount of

free and dissolved water molecules contained in the

oil sample

Yes Y New Delhi Labs/ERDA IS 2362

18 Flash Point Test Fire catching Point Yes Y New Delhi Labs/ERDAIS1448

PART21

19 Oil Power Factor

To Ensure the oil integrity is maintained and as an

indication of changed in quality resulting from

contamination and deterioration.

Yes Y New Delhi Labs/ERDA IS 6262

External Party Internally

CapableIS standard



/Power Gem


S. No. Test Purpose of test Site Test Instrument Req. Freq.

Page 3

Transformer Site test

20 Furanes values test.

To measure the Degradation of paper in the form of

sheets, tapes and other pressed shapes,

Heat,moisture and oxygen .

Yes Y New Delhi Labs/ERDA I.S2026

21 Partial Discharge.To measure the radio-influence voltage (RIV)

generated by any internal partial dischargeYes Y New Delhi Labs/ERDA I.S2026

22Tighten all bus and ground

connectionTo ensure Tightness of all Joints ans bus bars Yes Spanner and screwdrivers Y Yes

23

Alarm / Trip Test Ensure the Alarm and Tripping of the transformer.Yes

Manually Y Yes

24 BDV of main TankTo Measure the oil 's ability to with stand electrical

steers with out failure.Yes BDV Test instrument HY Yes IS: 335.

25 BDV of OLTC Tank Yes BDV Test instrument HY Yes

26 DGA.To Determine if there is an incipient fault condition or

unusual aging.Yes HY New Delhi Labs/ERDA IS 9434

27Measurement of insulation

resistance.

To determine the insulation resistance from

individual windings to ground or between individual

windings

Yes Digital Meggar and Milli

ohms meterHY Yes

[IS 2026 (part

I):1977

28Checking for foundation and

cracking and settling

A slight shift or transformer may break bushing or

connecting oil or water linesYes Visual Inspection M Yes

Page 4

IS for Transf Oil Specification

Un-inhibited Inhibited -IA

1 Appearance

Clear & transparent and

free from suspended

matter or sediments


free from suspended

matter or sediments


free from suspended

matter or sediments

2Density

g/cm3 0.89 at 27

0C < 0.895 at 20

0 C < 0.895 at 20

0 C

3 Kinematic viscosity at 270 Max.

27 cSt

at 270C

16.5 cSt

at 40 0C

16.5 cSt

at 40 0C

4 Interfacial tension Min. 0.04 N/m at 270C 0.04 N/m at 25

0C 0.04 N/m at 25

0C

5Flash point

Pansky-Marten (closed) Min140

0C 140

0C 140

0C

6Pour point

Max.-9

0 C -30

0 C -30

0 C

7

Neutralization value

Total acidity

Max.

Inorganic acidity/alkalinity

0.03mg

KOH/g

Nil

0.03mg

KOH/g

Nil

0.03mg

KOH/g

Nil

8 Corrosive sulpher Non-corrosive Non-corrosive Non-corrosive

9

Electric Strength (Breakdown voltage)

Min.

New unfiltered oil

After filtration

30 kV (RMS)

50 kV (RMS)

30 kV (RMS)

50 kV (RMS)

30 kV (RMS)

50 kV (RMS)

10Dielectric dissipation factor( tand) at 90

0

Max.0.005 0.005 0.005

11

Specific resistivity

At 900 Min.

At 27 0

Min.

30x 1018

ohm-cm

500x 1018

ohm-cm

-

-

-

-

12

Oxidation stability

Neutralization value after

oxidation Max.

Total sludge after oxidation Max.

0.40 mg

KOH/g

0.10% by weight

0.40 mg

KOH/g

0.10% by weight

No limit

INSULATING OILS [IS: 335-1983 OR IEC: 296-1982]

There are no specific lit of type/routine /acceptance tests to be performed on manufactured insulating oil. However, the

manufacturer shall verify the following characteristics by carrying out relevant tests on the insulating oil.

S. No. Property

As per IS: 335

(Un-inhibited)

As per IEC: 296

Page 5

CT Site test

1

Determination of errors or other

characteristics according to the

requirements of the appropriate

designation or accuracy class.

To check the error of the instrument

transformer both ratio and phase

angle error check the accuracy

class of transformer. Yes

3YDatagen Power

System

IS 2705

2Measurement of Tand and

Capacitance

To determine ratio of the power

dissipated in the insulation in watts to

the product of the effective voltage

and current in volt-amperes when test

under a sinusoidal voltage Yes

Ten Delta Test Kit 3 YrShanthala Power

Limited

3IR test on each winding, winding

to earth and between windings.

To determine the insulation

resistance from individual windings

to ground or between individual

windings Yes

Digital Meggar and

Milli Ohms MeterY

Yes IS 2705

4Checking of winding ratios by

primary injection test set.

Check the winding ratio of current

transformer. YesPrimary Injection Test Kit Y

Yes IS 2705

5Checking tightness of earthing

connections.Earthing connection

Yes

Spanner and

screwdrivers, Visual

Inception

Y

Yes IS 2705

6 Partial discharge measurement

Partial discharge test is a diagnostic

test for HV machines as it is capable

of revealing incipient faults Yes

PD Detector, High

Voltage

Capacitor,Oscilloscope

.

Y High Power Lab

IS 2705

7DGA and testing of other

parameters of oilOil Testing for internal fault.

YesY

New Delhi

Lab/ERDA

8Thermo vision Scanning of CT and

Top dome

To check the Heating of any

parts/clamp of PT YesIn fared Camera Y

Yes

9Checking and Cleaning of Marsh

ling Box.Yes

Visual Inspection,

Spanner,screwdriver

and Blower

Y

Yes

10 Checking of insulator for cracks.Measure the cracking of insulator

disc YesVisual Inception M

Yes IS 2705

11Measurement of CT Secondary

resistance Yes

Internal fault/

RequirementHigh Power Lab

12 Magnetization CharacteristicsYes

Internal fault/


External Party Internal

CapabilityIS standardS. No. Test Purpose of test Site Test Instrument Req. Freq.

Page 6

Potential Transformer

1

Determination of errors or other

characteristics according to the

requirements of the appropriate designation

or accuracy class.

to determine whether the errors of the PT are within

specified limits. Yes 3Y

Datagen Power

System

IS :3156 Part 1

2 Measurement of Tand and CapacitanceIndicates dielectric loss of the insulation. Yes Tan Delta Test Kit 3Y

Shanthala Power

Limited

3IR test on each winding, winding to earth

and between winding.To determine the insulation resistance from individual

windings to ground or between individual windings Yes

Digital Meggar Y Yes IS :3156

4 Checking tightness of earthing connections.Earthing connection Yes

Spanner and screwdrivers, Visual

InspectionY Yes IS:3156

5Partial discharge measurement Yes Y

High Power LabIS:3156

6Checking of winding ratios by primary

injection test set.Check the winding ratio of Potential transformer.

Yes Primary Injection Test Kit Y Yes IS :3156 Part 1

7 Partial discharge measurementYes Y

High Power Lab

8 DGA and testing of other parameters of oilOil Testing for internal fault. Yes Y

New Delhi Lab/ERDA

9 Checking of insulator for crackMeasure the cracking of insulator disc Yes Visual Inspection M Yes IS:3156

10 Thermo vision Scanning of PT and Top domeTo check the Heating of any parts/clamp of PT Yes Thermo Vision Camera M Yes

11 Magnetization CharacteristicsYes

Internal fault/


PT TEST

S. No. Test Purpose of testSite

TestInstrument Req. Freq. External Party Internal Capability IS standard

Page 7

1

Checking of

leakage(Third Harmonic

Resistive Current) current analyzer (mA) Yes

current analyzer (mA)

Y

Shanthala Power

Limited

2

Testing by Surge Monitor kit-

counter and meter tests

Yes

Surge Monitor kit-counter

Y

Shanthala Power

Limited

3

Resistance of bolted

connections Detects poor contacts

Yes

Milli volt drop meter

Y

Shanthala Power

Limited

4

Cleaning of Porcelain Insulator Yes HY Yes

5 IR Value Detects serious flaws, moisture

absorption and cleanliness.

Yes

Digital meggar

HY Yes

6Measurement of

Capacitance and TandYes

Tan Delta test Kit In case of

requiremen

t

Shanthala Power

Limited

Lighting Arrester


TestInstrument Req. Freq. External Party

Internally

Capable

IS

standard

1Computerized Digital ELCID of stator core Determines healthiness of stator core inter

laminar insulation Yes ELCID Evaluation Tester During Overhauling

India Electric works,Vikas

Electro Engineers,Aditya

Engg Services

2IR & PI Stator

Detects serious flaws, moisture absorption and

cleanliness of winding Yes Digital Megger 3Y Yes

IS-325

3Tan Delta / Power factor of Stator Winding Evaluation of stress grading, dielectric losses

and homogeneity of the winding insulation Yes Tan delta kit 3Y Yes

4AC Impedance on poles Detects the presence of short circuit turns

Yes 3Y

5 Motor Circuit Analysis Phase angle,current/ frequency

response,resistance,inductance and impedance

YesAll Test Pro 2000 Motor

circuit analyzer3Y Diagnostic Technologies

6 DC HV step voltage / Leakage Current Detects Insulation weakness and possibility of

warning of breakdown of incipient fault Yes 3Y



Engg Services

7

Surge Voltage on Stator Winding

Determines healthiness of turn insulation. Yes 3Y Yes

8 PD TestEvaluation of stress grading system and

location of Partial Discharge sites. Yes

PD Detector, High Voltage

Capacitor,Oscilloscope.3Y



Engg Services

9 Complete Overhauling of Motor For preventive maintenance Purpose.

Yes

3Y



Engg Services

10 Air gap MeasurementTO check the Measurement of the air gap

between stator and rotor Yes Air gap GuageY

Yes

11 Maintenance of cooling system Ensure the working of cooling system. Yes Visual Inception,Air Blower Y Yes

12 Winding Insulation resistance test

Detects serious flaws, moisture absorption and

cleanliness of winding. Yes Digital HT Meggar Y Yes

IS-325

13 Lubrication of Motor Bearing

Lubrication on a scheduled basis, in

conformance with the manufacturer's

recommendations, provides optimum bearing

life.

Yes Lubrication,Lubrication Gun HY or Running Hrs. Yes

14 Vibration Measurement of DE/NDE Side.

It tends to shake windings loose and

mechanically damages insulation by cracking,

flaking or abrading the material.

Yes Vibration Meter FN Yes

15 Earthing Connection Checking To ensure double earthing of motor. Yes Visual Inception M Yes

16 Temperature Measurement of DE/NDE side

Excessive heat is both a cause of motor failure

and a sign of other motor problems. Yes RTD,Thermo vision Camera M Yes

17 VisuaInspection To check the Motor Condition Yes Visual Inspection D Yes

18 On line Motor Current Signature Analysis

To determine the healthiness of Motor by giving

all the electrical parameters, Harmonic

analysis, Rotor bar health and bearing problems

Yes Electrical Signature analyzer On line Diagnostic Technologies

19 Acoustics Emission analysis

Motors Generate acoustics signal due to defect

growth in material,loss of lubrication,impact and

friction

YesMemo Pro Acoustics

Emission analyzerOn line Diagnostic Technologies



Engg Services

HT MOTOR


TestInstrument Req. Freq. External Party

Internally

Capable

IS

standard

Battery Bank

1 Checking of electrolyte level

To ensure the DM water level in battery Yes

Hand gloves and

visual inspectionM Yes

2Checking of emergency DC

lighting to control roomYes Visual Inpection

M Yes

3Checking of Sp. Gravity and

cell voltageYes

Battery Hydro

Meter,multi meterM Yes

4

Terminal Tightness of Battery loosenes of contact Yes

VisualInpection, Hand

glovesM Yes

5Capacity Discharge Test of

Battery SetTo Check the Loading Capacity of battery Yes

Battery Hydro

Meter,multi

meter,watch,Termo

cam

3Y Yes

6

Checking of charger panel /

DCDB for electrical

connection tightness and

cleanliness Yes

Air Blower,

Multimeter,Screwdrive

r

Y Yes

Battery Bank

S. No. Test Purpose of test Site Test Instrument Req. Freq.External

Party

Internally

Capable

IS

standard

Page 10

Extarnal Company Details

S.No. Name of Company Contact Details. Web/Mail Address

1 TDPS 0807734432-38,0807770541 www.tdps.co.in

2 India Electricl Works

3 Power Engineering Services Pvt. Ltd. 91-11-26348020 http://www.spespl.com/

4 Gujrat Turbo Enterprieses 91-422-2402574 [email protected],

[email protected]

5 Pioneer Generator 91-(11)-28111236, 28112306, 28112372http://www.processregister.com/Pioneer_Gen

erator_Co/Supplier/sid11453.htm

6 Pentagon Turbines (P) Ltd

+91 (80) 4292 1111/ 2780 5974 ,+91 (11)

4153 8031,+91 (40) 2381 5673,www.pentagonturbines.com

7 Power Gem Engineers

011-

27154771,47062960,47062960,29236074,2

2618199,22231620 ,27486910 www.powergem.com,[email protected]

8 Volt Amp +91-11-224 28331 / 224 39457

www.voltamptransformers.com

9 New Delhi Lab 01276-268404,011-25534101, 25534102http://www.newdelhilab.com/

10 Datagen Power System91-124-4670500,91-124-4670202 www.datagensystems.com,support@datagen

systems.com

11 Shanthala Power Limited 91 836 2335936/ 2335934/ 2334908 www. shanthala india.com

12 Vikas Electro Engineers

13 Aditya Engg Services 9810444992 [,95120-2895280

14 Diagnostic Technologies 0250-2392060,2392086,2392162 [email protected]

15 Padmavahini Transformers Pvt Ltd. 422-6531222,09843041222- 09442141222 http://www.padmavahinitransformers.com

16 Karytron Electrical Industries

91-11-45620856/45620857/65454780

http://karytronelectricals.tradeindia.com/Expor

ters_Suppliers/Exporters/hp/13052/home_pag

e.html

Page 11

http://www.processregister.com/Pioneer_Generator_Co/Supplier/sid11453.htm

http://www.processregister.com/Pioneer_Generator_Co/Supplier/sid11453.htm

http://www.pentagonturbines.com/

mailto:[email protected]

http://www.voltamptransformers.com/




Documents

Final Site Test