what r the advantage of selecting micro controller type tripping of circuit breaker than relay type tripping?

5 Answers   BARC,

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What is stray current in DC Traction?

2 Answers   L&T,

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What is the formula of frequency ?

0 Answers  

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what is feeder bay?

0 Answers  

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How Arc Extinguish in Minimum oil circuit breaker and What is the function of Radial and axial vents of turbulator in Minimum oil circuit Breaker Where these vents are exists.

1 Answers  

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What are the typical values of characteristic impedences of overhead line and underground cabel? Why there is so much variation?

1 Answers  

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how can we calculate the ratio of caustic soda and water in lrs.

0 Answers  

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What is farmula to calculate Diesel cunsumption as par KVA.

3 Answers   HCL,

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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 is the difference between Neutral And Earth ?

2 Answers   Ambuja, Reliance,

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Can a 150 kva 3 phase,440v/230v delta-wye connection stepdown transformer can be used in reverse as a step up tranformer ?

3 Answers   Meralco,

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Why Diffrential and Ref relays are used together although Diffrential relay can protect Pri and Sec of Transformer

1 Answers   Qatar Gas,

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