Answer / abdul hameed

first we need DC current in the rotor second we need AVR this device controlled the the voltage which feeding the rotor.this
method is suitably for brush and brush less generator

Answer / vinod

EXTERNAL DC SOURCE

Answer / siddhu

In an alternator the rotor acts as a field winding it produces rotating flux when excited with dc current by an external dc source when this flux cuts the armature, current is induced in it.

what is the purpose of taking HV test in LT panel.

1 Answers   PCE,

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why we are not earthing ht cable at both the ends(sending & receiving end)?

5 Answers   Essar,

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hi friends this is a newcomer in your community of enthusiastic peoples. i am preparing for SSC (CPWD JUNIOE ENGG EXAM FOR ELECTRICAL) pls guide me on the same how to crack it? PLS LET ME KNOW IS ANYONE THERE WHO PASED IT? CAN I GET THE QUESTION PAPERS OF PREVIOUS EXAMINATIONS?

0 Answers  

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Give 3 phase transformer connections for 24 pulse rectifier using thyristors.

0 Answers  

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we have taken HV test of 2.5 k and Megger test on 11 kv HT cable.here it shows no fault but when we are charging the same cable with 11 kv supply why the VCB 11 kv gets tripped can anybody define the possible cause of fault ?

4 Answers   MAHINDRA,

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WILL SCHNEIDER MAKE ACB(MASTERPACT)TRIP ON REVERSE POWER?

0 Answers   Schneider,

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State ohm’s law?

0 Answers  

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What is vaccum currcuit breaker.define with cause and where be use it device?

0 Answers  

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Give me check-list for electrical preventive maintenance of machine tool.

1 Answers  

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How to calculate the cable size in sq. mm. when the load is given in KW?

1 Answers  

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what is the IEC standard for Power Cable installation in onshore (like in direct buried ground or above groung)

0 Answers   L&T,

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how to find impedance , mutual indatnce in transmission lines

0 Answers   NTPC,

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