I have c license but I don't know eligibility of Max Kilo Volts under the electrical licensing board.

0 Answers   MindSquare, Sical,

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what clearance required for 4.5 mva dry type transformer?

0 Answers   SPS,

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plz explain the snubber circuit unit

1 Answers  

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How to design the NGR Resistance

0 Answers  

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How to calculate meter constant @ HT yard

5 Answers   Juniper Networks,

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How to calculate the transmission losses incase of overhead transmission lines?

6 Answers   Jindal,

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What are the types of excitation system?

0 Answers  

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what is the first step of dg shycroning ?

2 Answers   ABB,

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what is the purpose of silicon dropper used in battery charger?

0 Answers   KNPC,

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Pure inductive ckt takes power from AC when 1. Applied voltage and Current increases 2. applied voltage and current decreses 3. voltage decreases and current decreases please justify

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 are the types of 3-ph. generator protection

2 Answers  

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