⏚ Electrical Engineering

DC current to computers' PSUs?

Hi all, would the PSU of a computer work if I'd provide 220V DC current to it? If yes: why everybody wants an expensive...

11 comments posted 18yrs

posted by abuabi

11 comments posted 18yrs posted by abuabi

Very challenging problem ( Urgent solution required)

Please find the problem I am facing with a RING MAIN UNIT last few days. My 11 KV RMU breaker connected to a transforme...

2 comments posted 18yrs

posted by muralimayyil

2 comments posted 18yrs posted by muralimayyil

Voltage from electric hob rings?

A friend complained of getting a shock from their ancient electric hob. This occurred when they grabbed at a metal hand...

12 comments posted 18yrs

posted by deano

12 comments posted 18yrs posted by deano

Porky' say It's Over !

http://www.marvel.com/universe3zx/images/f/f5/IronMan_Head.jpg Dwarf ??? nevertheless still a Star.

0 comments posted 18yrs

posted by Royqui

0 comments posted 18yrs posted by Royqui

Re: Iron Man in a Theater Near You this Friday May 2nd, 2008

http://www.marvel.com/universe3zx/images/f/f0/Ironman01.jpg complex personallity - still warring with yourself? Now It's...

0 comments posted 18yrs

posted by Royqui

0 comments posted 18yrs posted by Royqui

sg3525 ic advice for inverter

Hi All, I'm trying to use a sg3525 ic in a Sinewave PWM. I've looked everywhere and can't find a straight answer, so I...

2 comments posted 18yrs

posted by me

2 comments posted 18yrs posted by me

What determines AC Motor RPMs

I had a random thought today. If I feed 120 volts AC (60Hz) into a motor, what determines it's RPMs? Obviously the 60Hz...

14 comments posted 18yrs

posted by nobody

14 comments posted 18yrs posted by nobody

Conditioners' efficiency

Hi all, we need to cool down a server room. It is known that we need 3500 BTU every KW of computers (plus some more for...

16 comments posted 18yrs

posted by abuabi

16 comments posted 18yrs posted by abuabi

Comparing ELK-1280 and Panasonic LC-R127R2P1 12V Batteries

I have an APC Symmetra UPS that is built on Panasonic LC-R127R2P1 12V 7.2 Ah batteries. Can someone comment on the suit...

0 comments posted 18yrs

posted by westes-usc

0 comments posted 18yrs posted by westes-usc

Two Sided Tape Thermal Insulation for Sticking Batteries Together?

Can someone recommend a two sided tape that also has some thermal insulation properties? I am replacing 10 12V batterie...

6 comments posted 18yrs

posted by westes-usc

6 comments posted 18yrs posted by westes-usc

280V motor on 230V circuit

I have a broken pool motor [magnetek y56y] which will cost a bundle to fix or repair. While doing a search on the web,...

196 comments posted 18yrs

posted by deodiaus

196 comments posted 18yrs posted by deodiaus

Electrical conductivity in steel wire ?

Could I have some advice please. I need to get a twelve volt, 1/2 amp supply five hundred metres up a hill. I do have a...

24 comments posted 18yrs

posted by grumpyoldhori

24 comments posted 18yrs posted by grumpyoldhori

anybody explain the inverter drives

hello all, 3ph,415v,50HZ motor operate with inveter drive.for instance if the motor is oprate with 25HZ what will be th...

4 comments posted 18yrs

posted by ngmven

4 comments posted 18yrs posted by ngmven

First three phase supply.

When, and where, was the world's first three phase public supply?

4 comments posted 18yrs

posted by furles

4 comments posted 18yrs posted by furles

Electric arc the green way

Powered by the sun ... no carbon atoms were harmed in generating this arc. http://phil.ipal.org/usenet/aee/2008-04-24/so...

0 comments posted 18yrs

posted by phil-news-nospam

0 comments posted 18yrs posted by phil-news-nospam