Refernce currents are to be generated using refernce cueernts how can this be done

0 Answers   ABC, Wipro,

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WHAT SHOULD BE THE BEST CURRENT RATINGS (PRIMARY / SECONDARY)FOR A CT INSTALLED AT THE INCOMING 11KV PANE? WILL IT BE CALCULATED ON THE BASES OF MAXIMUM DEMANT VALUE OR ON SUM OF ALL TRANSFORMER'S KVA? NOMALLY MAX DEMAND REPRESENT THE MAXIMUM OPERATING LOAD OF THE PLANT AND TOTAL KVA OF (SAY 5 NUMBERS TRANSFORMERS) REPRESENT THE CONNECTED LOAD. WHICH i.e. MAX DEMAND KVA OR CONNECTED KVA ARE BETTER TO USE FOR CT CURRENT CALCULATION? PLEASE ANSWER.

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Am using an electronic digital display to see the RPM of ABB ACS 550 drive, which is showing negative value when the motor & drive in stop mode but it is showing correct value during the run mode. can anyone help me out??

2 Answers   Bala Power Solutions,

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I am working in 600MW power plant currently in erection phase. I came along this term and want to know its meaning in simple language, consider me naive!?? All motors shall be of energy efficient type EFF-2 as per IS:12615/ equivalent IEC / International Standard.

1 Answers   Punj Lloyd Ltd,

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sir please send me previous year questions of jspl of electrical section through which i could prepare myself fpr the test.

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What is the Levels of High Voltage, Medium Voltage & Low Voltage?

1 Answers  

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what are the protection for DG set and why?

2 Answers  

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Hot Water System (HWS). Will a 30ma elcb have more nuisance tripping than 100ma elcb

1 Answers   CIMC,

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Why the Transformer Nuetral is grounded?

10 Answers   Infosys, Khartoum Refinery,

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Why the output of generator varies eventhough the shaft speed is constant in thermal power plant?

5 Answers  

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how brushed dc motor operating ?

0 Answers  

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what is reactive power?, why its measured in VA ? is it transient behavior of system?

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