If there is volagte between earth and neutral, what should be the reason ? and solution * What should be allowable limit in case, if the voltage between earth and neutral exist ? / OR what is limit for safe voltage between earth and neutral?

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sometime battery charged and then automatically charged when rectifier ON conition, is there any chances please clarify the same.

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Why and when NGR panel required. Is it necessary to design a NGR panel for a 6.6kV Alternator paralleling with Grid????

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Does all the output contacts (N/O as well as N/C) of a Numerical relay operate when relay receives a binary input/inputs or contacts are designated to specific logic input/inputs and only these contacts operate?

0 Answers  

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Dear All, In a 400V power system, ratio of three current transformers installed incoming switchgear is 4000/1. Maximum three phases short circuit current of this system is 48kA. One CT is installed on neutral of upstream transformer (6/0.42kV, solidly earthed) for 51G protection. Would you please inform me about the correct CT ratio of this current transformer (on neutral)?? Thanks a million

2 Answers  

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Do any one know exacatly when the results for NHPC held on 8th march 09 for engineering trainees will be released ?. if so please post it, i'm eager to know it.

0 Answers   NHPC,

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What will be the effect if I use inverter as UPS mood?

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how are reversing the direction of rotation of dc motor

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How is the gain affected by the introduction of feedback in a control system.

0 Answers   GE,

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1.Why we use choke?If we use for high starting voltage then different type choke gives different voltage. Is it correct?

2 Answers   Dalkia, Luminous,

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why do we use magnetic contactors ?circuit breakers are not enough?

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How loading get increased in generator not the speed, while we increasing steam to turbine.

2 Answers  

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