in india are trains run by DC or AC? if DC , from where it receives negative potential? because pentograph receives singe potential only?

2 Answers   GATE, PSU,

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why motors are rated in HP?

3 Answers   HCL, ncpl,

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which plant has high load factor

10 Answers   APTransco,

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Suppose i Have an Ac motor of 25Hp 1500 Rpm 50 Hz Can i run a motor 2500 Rpm by AC drives by increasing a frequency either it safe or not ....

2 Answers  

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reason of capacitor failure or low voltage in alternator wtih 10kva dgset

0 Answers   adag,

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Why a tesa lamp is glow between two phase?

0 Answers  

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Can anyone explain how the vector diagram of a transformer which doesn't have name plate be found whether it is Dy11/Dy5/Yd11 and so on?

4 Answers   TATA,

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What are the minimum acceptable insulation resistances of insulation of underground cable suitable for 0.440kV,11kV, 33kV and 66kV?

2 Answers  

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what efficiency at 70% loaded transformer

1 Answers   EEEC,

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What is the Difference Between MCCB & ACB & VCB

58 Answers   Absotherm, Delton, Divine, JLL, Jyoti Ltd, Kirloskar, L&T, RPP, Siemens, TCL, TCS, Teekays, YSJ,

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transformer phasor diagram under load explain it?

0 Answers  

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How to know the following data of synchronous generator 1. D-Axis Unsaturated Reactance 2. D-Axis Unsaturated Transient Reactance 3. D-Axis Unsaturated Sub - Transient Reactance

0 Answers  

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