Answer Posted / nimish

when A.C. supply is given to ferrite material there is a
change in its length this procedure is known as
magnetostriction and we know that transformer core is
consist of ferrite material and this change in length
causes humming during its running condition.

How to arrange a hous hold earthing system to keep minimum earth resistance( below 7ohms).

2172

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how to find the Motor,s insulation Power?

1757

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How much pf maintan in dg set in 6o% load,when Dg runnig Neutaal Earthing removed what happen.

1969

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What is Bolted fault?

2205

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why ten delta testing is carried out on power transformer

1811

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what are the main applications of transistor in non-linear region?

2040

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How to do cable sizing calculation for 750 A Neutral Earthing resistor for 33kv. the 33kv cable going to swbd. is 630mm2 3 runs.

4769

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We need to current density & short circuit calculation at 65kA for aluminium & copper busbar.

1736

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What is the formula for calculating the Instantaneous Short Circuit & overcurrent for any breaker

2006

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how to deside the capacity of chock for drive?

2050

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What is the maximum number of swithes that can be connected in series up to down stream point in an LV Distribution system?

2001

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what is maxemo work permit procedure

2193

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Why is tan-delta test and capacitor measurement done on alternator?

2204

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1 “earthing” for bonding of equipment and circuits to common plant earth electrode potential, 2 “protective earthing (PE)” when this bonding is required for personal safety provisions 3 “grounding” for interference suppressing bonding of screens, sys-tems with ground level 4. low-impedance earthing ? 5.primary earthing system and secondary earthing system what is that? 6.earthing electrode or mesh net earthing electrode ? very confusing , simple but very informative help required ? i will be very very thankful to you guys.

2063

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what is a synchronizing lamp ?

1618

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