Answer / hamed

Soft starter means useing auto-transformer to increase the
voltage gradually till it reach full speed.

Is=Voltage/sqr.root(X^2 + R^2 ),
So it is clear from the formula that the Is is small when
the Voltage is small.

why the motor is rated as kw& transformer as kva

7 Answers   Areva,

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Dear sir, How to calculate 3.5 core pvc aluminium armoured cable meter wise,give with best examples.... please help me in this regards....

1 Answers   Modi Builders,

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What is the use of iron core in a transformer?

0 Answers  

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Why field rheostat is kept in minimum position while armature rheostat at maximum position?

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how a synchronous motor is used as a resistor,capacitor and an inductor?

3 Answers   Technocon Services,

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plz tell me,ht and lt panel terminals in substations explain beiefly

0 Answers   APCPDCL,

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Showing results for capital, machinery, stock,wages, carriage in words, salaries, factory rent, repairs, fuel and power, buildings, debtors, sales, purchases, creditors, return outwords, return inwords, drawings, discount allowed, discount receivable, office expenses, bills payable, bills receivable, cash in hand, cash at bank, office rent comes under debit or credit

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50 electric bulbs are connected across supply of 220 volts. After one bulb is fused remaining 49 bulbs are again connected to same supply. which case will have more illumination & WHY????????

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how to find 5 kilo meter long under ground 33 kv cable fault location if IR VALUE shows 0.05 M ohm @5000 volt.and cable fault locator shows some time fault distance 3 kilo meter ,3.7 kilo meter and some time 1 kilo meter? now how to find the fault location that where is leakage. note--it is tested with 5000 kv megger and insulation resistance is 0.05 M ohm. and some time 0.03 M ohm comes.

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WHAT IS THE DIFFERENCE BETWEEN RESISANTANCE AND IMPEDANCE IF IMPEDANCE IS MORE THAN RESISTANCE AT SAME VOLTAGE CAN WE HAVE RELATION DERIEVED BETWEEN THEM

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what is alternator?

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how do we calculate of transformer in va?what is calculation?

2 Answers  

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