GTU:Electrical Engineering :Sem8:COMMISSIONING OF ELECTRICAL EQUIPMENTS

GUJARAT TECHNOLOGICAL UNIVERSITY
B.E. SEMESTER : VIII
ELECTRICAL ENGINEERING
Subject Name: COMMISSIONING OF ELECTRICAL EQUIPMENTS

Sr. No.
Course Contents
Total Hrs

1. Transformer:
Testing procedure for HV testing ,Phase shifting/ phase group , Radio
interference, Ratio Test , Load loss ,Separate source voltage testing ,Induced voltage
testing , Impulse & Surge testing , Noise level & vibration testing , Short circuit
withstand test ,Tan Delta test , Core insulation voltage test, Measurement of
impedance ,Testing of auxiliaries & safety device , Oil testing , Classification of
testing methods , Testing of bushing. DC & AC Resistance measurement, Temp. Rise
test, Short circuit test, Dielectric test, Partial discharge, Insulation resistance testing.
Polarity testing, Short time current rating, Impulse & surge testing, Determination of
error & accuracy class, Power frequency voltage withstand test, over voltage inter-turn
test. Determination of polarization index for transformer. Drying out procedure for
transformer. Commissioning steps for transformer, Purification & Filtration Procedure
for Transformer oil. Troubleshooting & Maintenance of transformer.
08


2. Induction Motor:
Testing (3-phase & 1-phase): Hammer test, Testing against
variation of voltage/current/frequency, Load test, NL & BR test, DC & AC,
Resistance measurement, Insulation measurement, Starting test, Temp. Rise test, Slip
measurement, HV test, Testing on auxiliaries, Vibration Test, Noise level test. Drying
out methods / Polarization Index / Hot Temperature measurement Degree of
protection (IP Grade) Commissioning steps for Induction motor, Heat Run Test.
Commissioning of Induction Generator. Troubleshooting & maintenance of induction
motor
06


3. Substation Equipments:
Bus bar Temp. Rise test, Rated short time current test, HV test, Power frequency
voltage withstand test, Impulse / surge testing, Vibration.
Earthing Earthing resistance measurement, Substation grid Earthing, Soil resistivity
measurement.
Isolator Testing Temp. Resistance test, Short circuit test, Charging current making &
breaking test, Inductive current making & breaking test.
06

4. Circuit breaker:
Testing of HV/LV circuit breaker: No load Mechanical
Operation, Mechanical endurance test, Temp. Rise test, Impulse & surge testing, short
time current test. Short circuit making & breaking test, Line Charging current making
& breaking test, Cable charging & capacitor bank making & breaking test, Out of
phase switching, Short line fault test, and Electrical & Mechanical endurance test for
LT switch gear like MCB / MCCB / ELCB etc. C.T. & P.T. Testing, Relay testing,
Coupling capacitors, Station Batteries for D.C. Supply, Fire Shifting Equipments.
Testing & Commissioning of Lightning Arrestor, Substation Commissioning by
Thermograph. Troubleshooting & maintenance of circuit breakers.
06

5. DC Machine:
Testing Voltage drop test or bar to bar test, Load test, Open circuit &
magnetizing test, Insulation resistance, Starting performance, Dielectric test.
Swinburne’s test, Hopkinson’s test, Field test, Separation of losses in DC shunt
machine. Temp. rise test & Heat run test Drying out process
Commissioning steps for DC machines Troubleshooting & maintenance
06

6. Synchronous machine: Testing
OC & SC test, Characteristics, Loss measurement, Temp. rise test , Over speed test ,
HV testing , Insulation resistance wave form interference , DC & AC Resistance of
armature & field winding measurement , Dielectric testing on armature & field
winding , Mechanical balance , Magnetic balance , Current balance , Phase sequence ,
Harmonic analysis , reactance & time constant , Speed torque current , Vibration &
noise measurement , SC test , Synchronizing circuit testing , Testing of voltage
regulators , Excitation circuit testing ,Voltage recovery test , Retardation test on load /
no load .Drying out procedure Commissioning steps for synchronous machines
Troubleshooting & maintenance.
06 

7. Commissioning of transmission line & Cable:
Derating of cable capacity, HV test,
AC & DC Resistance check, Insulation resistance, Impedance measurement, Location
finding technique for fault in underground cables (Murray loop test & Warley loop
test), Testing of open circuit faults in cables. Line charging, loading & Dropping.
04

Term work:
Term work shall be based on above syllabus.


Reference Books:
1. Testing, Commissioning & maintenance of electrical equipment By S. S. Rao, khanna publications
2. The commissioning of Electrical Plant by RCH Richardson (Chapman & Hall)