explain the types of drives

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5- What is the task (function) of the excitation and isolation transformers in power plant? 6- What is the task (function) of LCI (A), LCI (B) and LCI (COS) in power plant? : LCI (A) and LCI(B) are load commutating inverter for generator turbine starting. , LCI (COS) is load commutating inverter change over switch

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A power transformer 4MVA/11KV/0.415Kv has been out of use in 12years. what maintenance actions/test need to be carried out before energizing.

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what is the rating of Insulation tester for measure 15 KW, 3 phase 415V 50 HZ induction motor?

2 Answers   ABB,

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a transformer can beb used as aload?give discription

2 Answers   Esses Eltech Systems,

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Why the Potential transformer Primary in connected to Earth?

2 Answers  

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how to commissioning the genset with amf panel?

0 Answers   Cummins,

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What is the difference between solid grounding and impedance grounding?

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What is the difference between switch gear and control gear ?

2 Answers   QU,

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FEINGING DECREASES THE FLUX DENSITY IN THE AIR GAP. HOW?

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What happens to the terminal voltage of an alternator connected to a bus bar when it is suddenly disconnected from the bus bar??

2 Answers  

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In alternator generally we give DC voltage to field of alternator but field (excitor)produce Ac & converts into DC by rotating rectifier(RR ) then fed to rotor .my question is why we cannot give dc voltage directly to rotor instead of Excitor & RR ?

1 Answers  

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