50 Hz. vs. 60 Hz.
50 Hz. vs. 60 Hz.
(OP)
Just looking for some information. Our company is starting a business in China and they are looking to me to give them load calculation for the equipment they are purchasing. I know that their voltages are 390/220 50Hz. Can I use the same load calculations 50 Hz. as I do for 60?






RE: 50 Hz. vs. 60 Hz.
RE: 50 Hz. vs. 60 Hz.
IF you wre speaking of "load" as being current, then the difference in voltage (not frequency) would mean that busbars, cables etc. would need to be bigger because the CURRENT load would be higher if the kW was the same.
IF you were speaking of "load" as being total work performed over time, then in some applications the difference in speed from 60Hz to 50Hz combined with the voltage being lower may require slightly larger motors to accomplish the same net output in the same amount of time as it would at 480V 60Hz (assuming that is what you meant, you never said that either).
JRaef.com
"Engineers like to solve problems. If there are no problems handily available, they will create their own problems." Scott Adams
For the best use of Eng-Tips, please click here -> FAQ731-376
RE: 50 Hz. vs. 60 Hz.
RE: 50 Hz. vs. 60 Hz.
melliot,
Sorry if it sounded like I was taking it out on you!
JRaef.com
"Engineers like to solve problems. If there are no problems handily available, they will create their own problems." Scott Adams
For the best use of Eng-Tips, please click here -> FAQ731-376
RE: 50 Hz. vs. 60 Hz.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: 50 Hz. vs. 60 Hz.
Just kidding of course Keith, you did a great job on that FAQ and did it for this exact reason. I recently pointed someone in a different forum to it because it sums up some complex issues into one page, saving me from typing it over and over again.
JRaef.com
"Engineers like to solve problems. If there are no problems handily available, they will create their own problems." Scott Adams
For the best use of Eng-Tips, please click here -> FAQ731-376
RE: 50 Hz. vs. 60 Hz.
BTW jraef, dang cold around here isn't it! Went out with a non-contact thermometer this morning at 0400 and found 21F on the covered porch and 11F in the open. 9F on top horizontal ivy. burrrr.. But the new furnace is tops!
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: 50 Hz. vs. 60 Hz.
For those of you reading this in cold climes this may not seem to be a big deal, but Keith and I are California boys, we are NOT used to this!
JRaef.com
"Engineers like to solve problems. If there are no problems handily available, they will create their own problems." Scott Adams
For the best use of Eng-Tips, please click here -> FAQ731-376