Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations LittleInch on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
What are the advantages or disadvan
- Thread starter andstef
- Start date
jbartos
Electrical
- Jan 15, 2000
- 6,440
Suggestion to andstef (Electrical) Oct 12, 2002 marked ///\\What are the advantages or disadvantages of 480V/60Hz three-phase power distribution in the USA in comparison to 400V/50Hz in Europe?
///Advantages:
1. 60Hz is better aligned with 360 degree of circle
2. It is better for clocks
3. Allows higher synchronous speed, i.e. 3600RPM versus 3000RPM
4. Higher level of DC or AV obtained from sinusoid over certain time interval.
Disadvantages:
1. Bigger Eddy current and Magnetization (Steinmetz) Losses
2. Not decadic division
3. Less used around the World than 50Hz\\
Why 208V/120V?
///This is for commercial and institutional use to have 120V single phase for small appliances and three phase loads.\\ How to calculate 208V?
///120 x sqrt3 = 208V\\\
///Advantages:
1. 60Hz is better aligned with 360 degree of circle
2. It is better for clocks
3. Allows higher synchronous speed, i.e. 3600RPM versus 3000RPM
4. Higher level of DC or AV obtained from sinusoid over certain time interval.
Disadvantages:
1. Bigger Eddy current and Magnetization (Steinmetz) Losses
2. Not decadic division
3. Less used around the World than 50Hz\\
Why 208V/120V?
///This is for commercial and institutional use to have 120V single phase for small appliances and three phase loads.\\ How to calculate 208V?
///120 x sqrt3 = 208V\\\
- Status
Similar threads
- Question
- Question
- Locked
- Question
- Locked
- Question