what is the thumb rule or formula for cable size and current ratings

1 Answers  

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What is the Difference Between MCCB & ACB & VCB

3 Answers  

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how external lighting design? please give examples?

0 Answers  

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how many typetesting of transformers?

8 Answers   ONGC,

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What is meant by locking of rotor in synchronous motor? Explain me locking in detail?

3 Answers  

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Wghat is D-curve MCBs

3 Answers   Indeco,

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A resistance, inductance & capacitance are connected in series between points A & B.The voltage drops across the resistance,inductance&capacitance are found to be 40V,70V&100V respectively. What is the total voltage between between points A&B (Vab)? a)210V b)70V c)50V d)230V

6 Answers  

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What is meant by power factor correction?

5 Answers   Aspire,

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what is tan delta point in a current transformer?

2 Answers  

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Which element has power dissipated in it when the source is removed ?

2 Answers   SSC,

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I have a small system with two motors that are running on 380 vac, 60 hz. These motors are expensive and I usally get them from Brazil. I am adding another motor to the system, but I want to purchase a 480 vac, 60 hz motor to use. It will be on a VFD that is rated fro 380 thru 480. Is this posible and will I have to use a larger motor and derate it?

0 Answers   US Electrofused Minerals,

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explain working of differential protection for a transformer?

1 Answers   BARC,

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