Answer / pillay

You need a magnetic field to produce electrical energy.This
can be produced from electro magnetic means . What if during
a power failure when the DG set usage is most wanted and the
electrical source from a battery is also not available say
due to battery failure or discharged battery.To avoid such
situation a permanent magnet is used instead for initial
excitation.

What is the function of restraining coil in differential relay? as well as restraining current?

8 Answers   Medical, Siemens,

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The armature of shunt dc motor has 0.8ohm resistance and motor is to run on 120V circuit.If motor is suddenly thrown on circuit while armature at standstill then current drawn by motor will be??Also back emf in normal running is 110V

2 Answers  

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if the load is reactive then what is the use of calculating the real power and what is the use of reactive power if my question is wrong please excuse me..

1 Answers  

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what is diode? and what it is used for ?

3 Answers  

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How many capacitors using in LT panel as per Govt rules?

0 Answers   Electrical Tech,

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why transformer is giving some humming noise .....?

11 Answers   Electrotherm, JSW,

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when u are given a timer,push buttons and contactor, how do i practically make a star delta control circuit and a direct online control circuit?

1 Answers  

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1. Design a counter which counts 0, 4, 8, 2, 6, and repeats using: 1.a using JK flip flops 1.b using T flip flops 1.c using D flip flops

0 Answers  

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tell me some type of questions throught which i can prepare for exam and do my best

0 Answers   Jindal,

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WHAT IS THE DIFFERENCE BETWEEN SHOP DRAWINGS/ DESIGN DRAWINGS AND AS BUILT DRAWINGS??

2 Answers   ACC, Al-Jaber, Dubai Group, ECEC,

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what is the formula to find battery back up of ups?

3 Answers  

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keeping in view of parallel operation which of the 3 phase transformer connection are possible? a)delta-delta to delta-star b) delta-delta to star-delta c) star-star to delta-delta d) delta-star to star-delta

4 Answers   Ecil, Siemens,

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