what is the purpose that we use PLC system in power system

2 Answers   Glatt, MTS,

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In all the generators, the excitation supply is DC. What is the significance of DC excitation? What will happen if AC supply is given as excitation supply?

8 Answers  

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Can be ammeter and voltmeter used without CT? if not, what is the reason for that?

3 Answers   Elektrotek, Toyo Engineering,

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1.Z transform always lies around ? a) origin b) pole c) zero d) z=1. Multiples Mcqs which is bother me can’t find answers on internet. Some help required with little explanation . Note: this is not homework or related to any test. Thanks

0 Answers   CCP,

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how many safety really of DG sets.

0 Answers   MBD, Nerolac,

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I need to compare the energy consumption of an industrial machine before and after improving. Shall I compare the apparent power or the active power? I know usually factories use compensated capacitors (or other similar components) to compensate the reactive power, so if I use the apparent power, it's not the real power consumed.

2 Answers  

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What is the different between Earthing & grounding?

1 Answers  

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can we amplify dc signals.how can it be done

4 Answers  

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a transformer runs by electro-induction principle like all motors.then why dosen't it rotate just like any other motor

2 Answers  

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Why CT secondary is grounded?

4 Answers  

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why the substation require din electrical system?

1 Answers  

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What's the differs between voltage & current & emf.

1 Answers   CTS, NTPC, TCS,

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