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Thanks everyone for your advice. I think I understand a bit more. Davidbeach, what golftennis had posted seems to be in line with the accepted testing norm in my country (well from what I learn from the the test anyway.) I think the confusion came from defining what is meant by a 300kVA...

Can some one advise me on the following? I recently witness a testing for a 300kVA Genset I realize that typically the suppliers will be refering to their machine as 240kW at 0.8 power factor. The test was done on a pure resisitive load The manufacturers tried to pass the testing at 240kW...

Thanks, Gunnar for pointing that Omega thing out. thanks, dpc, I was suspecting that it should be base on the ballast's as well but not sure if the value already considered the correction or not and as Waross point out we should really be looking at the staring current.

Thanks waross, I guess it is implied that the ballast line current would be covering the lamps and P.F correction capacitor? --------------------------------------------------------- Looking at a data sheet from phillips BSN40L407ITS. The current listed would it be inclusive with the P.F...

Hi, Just wondering if anyone could help me with calculating the current that should be running in a typical HPSV Lighting circuit. (teach me how to read the data sheet) Considering a 400W lamp - Magnetic Ballast - Ignitor - P.F.Capacitor Should I sum all the power loss + 400W. Do I need to...

I always wondered about painted conductor. What does this mean? And why a higher carrying capacity after painted compare to bare. By heat loss consideration or temperature rise limit you would assume the bare copper to be the limit. Please advise.

You can try http://www.westasia.com.sg

Thanks for all the replies. The transformer is a cast resin type 2MVA, 11k/433 Anyway I guess we just have to check with the manufacturer. regards

How does one go about identifying a transformer's winding material? Is it only possible to speculate by weight difference?

Thanks candu6, But I am interested in more details. On how we can work out the space reduction and suitable material. Material with dielectic rigidity 12kV/mm System being 12kV Add material 1mm thick around the conductor and we could have 2 conductors siting side by side ? Should we be...

Hi, been picking up bits of useful knowledge just reading the board.So wondering if you guys can help me. On MV gears design, I have often come across barrier place between the phases or ph - earth. I am told that these are able to reduce the required air clearance. they act to prevent...

I am still confused. Is there any difference in the the two, When one make the same type of connections. Assuming a 4th coil is available for the ground fault detection? Both being a summation of the 3 phase's individual CT? Or is it just a difference in measurement method? 51N being...