Answer / neoveyron

CTUM 15 is a alstom make electromechanical relay used for the Sensitive earth fault protection for feeders by means of a CBCT. These operate on the principle of leakage current measurement by means of a residual connection of CT or a CBCT. These can be set for 1% to 16 % of CT ratings. The time dial settings can be set from 60 milliseconds to 750 miliseconds. These provide protection against high resistance ground faults on an earthed system.

What are the conditions to be satisfied before connecting two DC generators in parallel?

9 Answers   Bhel, Godrej,

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i am using auto transformer for starting of induction motor to provide reduse voltages...but the principle of a tansformer according to definition"which transform energy to on circuit to another circuit with constant power and constant frequency". so if i am using reduse voltage then current obsely hige because power is same.but we use auto transfarmer for starting of induction motor to give low current.but here according to definition we are giving hige current.

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why do we require two lines one phase and a neutral for an ac transmission..is neutral potential zero..?if yes y carry a neutral line from generating station itself...why dont we take it from ground

1 Answers  

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why core is useful for a transformer ?and also in its operation ?

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Does outdoor isolator loose connection cause short circuit current in that circuit? if yes then how ??

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why we do not get the electric shock at end of returning water of water cooled cable

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If carbon brushes spring tension either loose or tight, what happen on Motor performance During Full load Operation?

5 Answers   Electrex, HP, TATA,

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How to calculate the input cable rating for 10kva ups (3phase input and single phase output and also 3phase output, battery rating 65Ah)provide the formula also.thnx

0 Answers   Bhel,

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what is the difference between Central Battery System and UPS in applications and uses? and why UPS suitable for Computers and central battery for emergency lighting?

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Is RTCC panel needs any control supply.

0 Answers   HPCL, Schneider,

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what is IP55,IP65

4 Answers  

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What is meant by pitch of a synchronous machine.??

1 Answers   Kirloskar,

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