Circuit Breaker Making Capacity
April 25, 2016
During short circuit, circuit breaker contacts opens and automatically closes after few cycles to determine whether the fault is cleared....
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Parallel Operation of Alternators
April 25, 2016
Requirements of parallel operation of alternators: The alternators which are to be operated in parallel should meet the following requirements...
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Battery Interview Question and Answers
April 25, 2016
What is primary cell and secondary cell? Battery which can be discharged only once is called primary cell ex: Manganese...
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Induction Motors Faults and Protection
April 25, 2016
Faults that can occur in 3 phase induction motors and associated protections are discussed below: Stator faults: These faults include...
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What happen When Synchronous Generator loss Excitation
April 25, 2016
During normal operation of the Synchronous Generator or Alternator excitation to the rotor is provided by the small DC generator...
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Why rating of Synchronous Generators and Alternators in MVA or KVA
April 25, 2016
Normally the rating of synchronous generators or alternators will be in KVA or MVA instead of kW rating. Electrical apparatus...
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Comparison of HVDC transmission and HVAC transmission
April 24, 2016
DC transmission has some advantages over AC transmission, but it cannot completely replace ac transmission system due to some limitations...
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6.6kV HV Induction motor Protection
April 24, 2016
HV 6.6kV Induction motor Protection For HV motors rated 6.6kV and above motor over current, stalled rotor, and short circuit...
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DC Motor Applications in Industries
April 24, 2016
DC Motor Applications in Industries In spite of wide use of ac supply, dc machines have some advantages compared to ac motors...
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Why Damper windings used in synchronous motors
April 24, 2016
Synchronous motors are not self starting machines. These machines are made self starting by providing a special winding in the...
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