how to check avr of dg set of 125kva

0 Answers  

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plz tell me about BACK emf and how it generates?

2 Answers  

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One of our gas turbine generator unit "1st stage rotor ground fault" alarm was occured several times. we tried to measure some voltage vulue ground fault protection relay (UNS3020a made by ABB and we measured the value of: Ground: 0.9VDC 5V: 5.8VDC 24V: 23VDC u+: 300 – 350mVAC Rf1: 17.5mVAC Rf2: 17.6mVAC The unit still running and the alarm was reset. As of 6pm yesterday and unitl now no alarm happened again. I our protection relay was defective?

1 Answers  

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what the principle of sincroscope?how it works?when it needed?

0 Answers  

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What is the difference between synchronous motor & asynchronous motor

2 Answers  

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Meter p.t. ratio= 3×230/400 , c.t.ratio = 3×1 (2) A what is m.f.

0 Answers  

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Draw a SLD for main panel for school having connected load of 1200kw and emergency generator 200kw.also show the increase of additional load of chiller 225kw in the lv panel indicating meter postion size of transformer ,cables and capacitor bank.

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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what is pmu

1 Answers   Alstom,

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What is the difference between SSR drive& AC drive?

1 Answers   ITC Infotech,

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what is safety measures of alternator.

10 Answers   HP, MNC,

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what is reactive power?

8 Answers  

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