Answer / k mutyala naidu

by using three point starter we cant control(different speeds) the speed,but by using 4 point stater we can control the speed of the motor.

Answer / sheikh

3 point starter used to make and break the only for phasees
like Red , Yellow & Blue phase. and 4 point starter used to
make & break the 3 phase and Neutral also . 4th point may use
for make & Break the neutral of given circuit

Answer / shiva

high current in four point starter

why full load voltage is less than no load voltage?

4 Answers  

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What is power focter ?

6 Answers  

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explain with diagram how to protect transformers and substations from over current with help of CT's?

0 Answers   BARC,

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a 3 phase motor was running with delta connected, suddenly one phase winding got burnt off, what will be the effect ?

8 Answers   Bhel, RRB, SR,

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what happen if drive input fail momentry at 48.5 HZ frequency?

0 Answers  

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In more then 1 phase bulb will glow are not?if yes then how it will glow?

2 Answers  

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wht d.c produces corrosion

1 Answers  

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What is the ratio of Booster transformer?

0 Answers  

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Purpose of providing neutral isolation panel for parallel operation of diesel generator

0 Answers  

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What is T’Q and X’Q and X’D ? and what is saturated as well as unsaturated ?

0 Answers   XX,

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1)Why electric shock is feel ?? n in a Electric Train why we didnt feel that ? 2)What is the reason for transformer Noise ?? 3)What is relation b/w Transmission Lines & Communication Lines ? 4)Which material is used for making Transformer oil & How u measure its dielectric strength & Name the test ?

14 Answers   NTPC, Tata Power,

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what is the minimum voltage require to injure our body?

4 Answers  

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