Answer / r.sreemanikandan

VFD used to control the speed by varying the frequency.
when the frequency is reduced the power consumption also
will be reducing. by this way we can the save the power
consumption also

Answer / vijith

we can save the energy by controlling frequency through
cdp& we can protect the motor also

what is the basis for selection of Protection CT class ? How anyone can decide whether to go for 5P10 or 5P20 ?

3 Answers  

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what is the working principle of contactor and conditions of normal open and normal close on it?

3 Answers   EEE,

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What will happen when we will connect lamp in between phase and earth. 

3 Answers  

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what is motor

6 Answers   HBL Power Systems,

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Questions :- HR- Q.1 about yourself & family background ? Q.2 Why u choose Power sector as ur carrier starting not any other sector ?? Q. 3 What think abt NTPC ? Techincal Questions:- Q.1 about Vocational Training……What u did , see the main equipments….etc Q.2 Why a transformer Noise during its running condition ? Q.3 about transformer oil material & Test name for the measurement of its dielectric strength & wht will u do if its dielectric strength goes low ? ……..some discussion type ? Q.4 What is relation between transmission lines & Communication lines ? Q.5 Which Machine u will prefer to use at a place where flammable gases are coming out & why ? Q.6 how fault in an electric system is detected & hw protection of equipments is done ? Q.7 Why we didn’t feel electric shock in an electric train ?? Q.8 Anything u want to ask from us ??

44 Answers   Akona Engineering, Bhel, BSES, Cranex, DRDO, JCB, NTPC,

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Where should the lighting arrestor be placed in distribution lines?

0 Answers  

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What is dynamo?How it works and what is the function of dynamo in a DG.

3 Answers   Amrapali,

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how the find ct mf and mf roll in metering

1 Answers  

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whytransformers rating in KVA?

3 Answers   Chettinad,

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We have a distribution transformer of 750KVA/11kv/440v and an AVR (Servo Stabilizer) of 750KVA on the LT side of distribution transformer. Also we have an ACB of 1200A on the output of distribution transformer (that is on the input of AVR). We want to have an MCCB on the output of AVR. What should be the rating?

0 Answers   SSPL,

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How we can make sure cable size of LT cable without any parameter.

2 Answers   Paradip Port, Siemens,

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WHY THREE PHESE SYSTEM VOLTAGE APPLIED IN 440 VOLT

0 Answers   Infotech, InTech,

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