A powerplant has 8 gensets operating in grid parallel mode. In one genset sometimes there is pf variation and kvar variation. The plant operates in pf mode. When this variation is observed the load is stable, voltage is also stable, freq and genset speed is also stable. How will you check the functioning of pf card. What shall be the ideal output vdc of the pfc, from there it is input to AVR?

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Our Alternator nameplate specifies a power factor of 0.8. When the Alternator is on light load, the bus bar voltage rises to 11240 volts, whereas the standard value is 10500 volts. Is it ok to increase the power factor to 0.85 or 0.9. I am afraid because the power factor on the name plate is only 0.8 ?

3 Answers   Escube,

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what is Thermocouple? Type of its.

2 Answers  

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what is the unit of current

12 Answers   RRB,

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Is there any problem about which the drive (inverter) doesn't show/display the alarm and/or fault but instead of this , it doesn't work ? I want to know that could there be any kind of problem in the drive when the drive doesn't display the alarm and/or fault ?

0 Answers   Siemens,

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my UPS suddenly goes off and all panel light also blow off.This happens even main electric supply is not interrupted.After some time it automatically starts functioning normally.Batteries are new.

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the power loss in an overloaded line is mainly due to? a. resistance b. capacitance d. inductance d. none

4 Answers  

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We wish to test 60 Hz systems from a 50 Hz supply. To acheive frequency conversion, we use a VFD. The VFD powers 40 kVA transformer, which has motor and non-motor loads on it. Will the transformer work?

2 Answers   Suzlon,

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Can any body tell gulf interview question for experienced electrical engineer ?

0 Answers   Gulf,

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for leading power factor penalty by SEB why

2 Answers  

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i want to know about for what reason we are using star delta starter? how it works? what are the advantages?

4 Answers  

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What aturn on methods of scr?

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