Commissioning of Electrical Equipment

GUJARAT TECHNOLOGICAL UNIVERSITY
ELECTRICAL ENGINEERING
B. E. SEMESTER: VII
Subject Name: Commissioning of Electrical Equipment
Subject Code: 170903

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.
06
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
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, 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
3. Sub station 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.
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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 ,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 Thermography.
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. Swinburn’s test,
Hopkinson’s test, Field test, Separation of losses in DC shunt machine. Temp.
rise test & Heat run test
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Term work:
Term work shall be based on above syllabus.
Reference Books:
1. Testing, Commissioning & maintenance of electrical equipment By S. S. Rao
2. The commissioning of Electrical Plant By RCH Richardson (Chapman & Hall)
Drying out process
Commissioning steps for DC machines
Troubleshooting & maintenance
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
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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
under ground cables ( Murray loop test & Warley loop test ) , Testing of open
circuit faults in cables . Line charging, loading & Dropping.
Disaster management - Post disaster commissioning of power system
component
e. g. generator,transmission line, Electrical machines and equipments.
06

Term work:
Term work shall be based on above syllabus.
Reference Books:
1. Testing, Commissioning & maintenance of electrical equipment By S. S. Rao