WHAT IS DIFFERENCE BETWEEN MANUAL CONTROL AND MAGNETIC CONTROL AND STATE ITS ADVANTAGE /DISADVANTAGE

0 Answers   Siemens,

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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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how could we calculate the no of outgoings from a 800 watt distribution board

0 Answers   United Engineering,

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What is the difference between earthed & unearthed system?

2 Answers   HCL,

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What is different between hypo test and megger test

2 Answers   ABB,

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why there is a humming noise in transformer

8 Answers   Bhel,

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Types of tempering of energy meter?

1 Answers   Nespak,

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Why in 6 KV XLPE cable termination kit used and why not in 380 V xlpe cable same is not used

0 Answers  

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Definition of grid?

7 Answers   L&T, Pace Power Systems, Vijai Electricals,

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What is the difference between generator and alternator?

2 Answers  

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Differance between ELCB and RCCB?

8 Answers  

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why we measure output of transformer in kva?

1 Answers  

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