50Hz, 415V and 60Hz, 220V system
50Hz, 415V and 60Hz, 220V system
(OP)
What is the difference in the design of transformer and motor (core and windings) in US (220V,60Hz) and India (415V, 50Hz)?
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
Download nowINTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
50Hz, 415V and 60Hz, 220V system
|
RE: 50Hz, 415V and 60Hz, 220V system
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: 50Hz, 415V and 60Hz, 220V system
220V,60Hz went out about a half a century ago.
A standard motor voltage is 230 Volts to be used on a standard system voltage of 240 Volts.
230V,60 Hz = 3.83 Volts per Hertz.
415V,50 Hz = 8.3 Volts per Hertz.
Note; 230 Volt motors are often dual voltage and usable at 460/480 Volts with a V/Hz ratio of 7.67 Volts per Hertz.
Also, motors intended for European markets tend to have one winding per phase for star or delta connection for a dual voltage ratio of 1.73:1
Motors intended for North American markets tend to have two windings per phase for series or parallel connection for a dual voltage ratio of 2:1
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: 50Hz, 415V and 60Hz, 220V system
At some places I have read that core losses increase in case of 60Hz.
But I think it should decrease in case of 60Hz.
RE: 50Hz, 415V and 60Hz, 220V system
RE: 50Hz, 415V and 60Hz, 220V system
The results are generally:
Maximum rated current; the same.
Maximum rated voltage; changes in the ratio of Hz2/Hz1 For 60Hz to 50 Hz, 50/60
Maximum rated KVA or HP; changes in the ratio of Hz2/Hz1 For 60Hz to 50 Hz, 50/60
Speed for motors; changes in the ratio of Hz2/Hz1 For 60Hz to 50 Hz, 50/60
A dual rating of 110V, 50Hz/120V, 60Hz is common on a lot of small control equipment. eg; Contactor coils, some control transformers, small motors such as shaded pole or verry small synchronous motors.
I do not intend to contradict ScottyUK in any way. I generally work on small equipment, about 1 MW or less. Scotty works on equipment in the MW range. Size matters and effects that are ignored or not even noticed on small equipment become serious issues on the big stuff.
Bill
--------------------
"Why not the best?"
Jimmy Carter