Answer / vijay

38.4mins backup time

Suppose a 3 phase, 2 pole, 440V induction motor is driving a flywheel of 600mm diameter, 150kg mass. By using v-belt and pulley, the speed is increased to 4500 RPM. What will be the effect on motor current?

0 Answers  

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Electricty is generated at around 16kV, then step up to 220kV for transmission then steped down to power transformers then DTs and then through the LT n/w it reaches the consumer end. At the consumer end 230V supply is required. So, why is electricity not generated directly at 230V and transmitted?

4 Answers  

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how to calculate overall efficiency of diesel generator set? give us a formula with an example.

2 Answers  

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Pls explain about vfd control?Where it is used, Give some example?

3 Answers   Siemens,

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How to put breaker in service / test position.

1 Answers   KSEB, L&T, Siemens,

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What is power factor why we should maintain the power factor unless what will happen

0 Answers  

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Pure inductive ckt takes power from AC when 1. Applied voltage and Current increases 2. applied voltage and current decreses 3. voltage decreases and current decreases please justify

2 Answers  

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If Neutral Grounding Resistor (GR) failed/shorted. Is it repairable.

0 Answers  

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Explain the purpose of inductor in an electric circuit?

0 Answers  

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Advantages/Disadvantages of earthing of neutral bus on MSB instead of separate neutral earthing for transformer/DG sets feeding to MSB

0 Answers  

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In ac circuit R,L,C are connected in series what is the output the circuit? explain

4 Answers  

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In CDG type IDMTL realy O/L , E/F, O/C which are used for out going feedrs,on R-phase o/c element, Y-phase , e/f elecment and on b -phase o/c element will be connected . Why the earth fault on center phase only, why not on other two phases?

2 Answers  

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