Answer Posted / sathish kumar

nowadays, 3 phase induction motors are used because of
latest deveopments and controlling motors with vvvf drive..
(variable voltage and variable frequency)...

What is the tests required for a 132 kV, 400 kV , 765 kV for a Circuit Breaker and Power Transformer before commissioning ?

1602

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what do u understand about FACTS? how they are useful?

2003

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how i chosse capacitor bank if my energy meter is 48 kvr? tell me capacitor bank chossen formula?

2351

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What is FTA card? How it works?

2237

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I HAVE A 50A MCCB AS PER DESIGN LINE WIRE CONNECT UPWORD SIDE AND LOAD IS CONNECTED TO DOWNWARD SIDE TO THE MCCB.IF NOW ANY ONE CHANGE SUPPLY & LOAD(WISEVERSA) WHAT HAPPENS ? DOES MCCB OPERATION OR WORKING FUNCTION NORMAL IF YES THAN WHY THERE ARE MARKED LINE & LOAD ON MCCB.

2387

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how hydrogen cooled alternator undergo maintanence ? that is hydrogen when come in contact with air can result into explosions .

1921

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What is the difference in calculating size of AC cables compared to calculating size of DC Cables? Usually DC Cables are larger than AC Cables although they have the same ampacity. Why is it?

1994

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what are the applications of PLC?

1978

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DESCRIBEPNEUMATIC SYSTM OF ASH HANDLING PLANT

5542

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why surge protectetor work explain with the help of circut diagram?

2012

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How to know th details about an electrical Drawing ? Please mention the easy method.

2458

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Is any AC drive(VFD) had a feature of DC injection braking? if available please mention the detail. i.e drive can supply braking torque when the motor in idle state.

2151

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How can we calculate the transformer rating if the load calculated is 1000KW (11Kv Supply)?

1084

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dear sir/madam i want to get some knowledge about RRB EXAMINATION(section engineer) 1- what is minimum cut off 2- wht portion is major portion . 3- can any body provide Sample paper. thanks & regards ashish

2371

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Air circuit breaker safety

1432

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