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!

Register Log in
  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Duty cycle

Status
Not open for further replies.
eltooon

eltooon

Mechanical
Joined
Apr 4, 2011
Messages
33
Location
US
Hi,

I'm purchasing a magnetizing machine for company, and it has specs as follow:

3-phase, 380V, 50Hz

Current = 300A
Duty cycle = 30%

Taking into consideration of the duty cycle, how much power should be allocated for safe operation?





 
Sort by date Sort by votes
It depends on how you are planning to use it. If you run it for one minute and let it cool for 2 minutes or more, then it is quite safe to fuse it for 100 A or 125 A. But, if you run it 10 minutes and let it cool for 20 minutes and do it all the day, you may need to go up to full 300 A - or just below. It depends on your protection and its time constant also.

Gunnar Englund
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
 
Upvote 0 Downvote
Status
Not open for further replies.

Similar threads

usher00
  • Locked
  • Question Question
Sizing for Duty/Standby pumps
Replies
5
Views
411
ScottyUK
ScottyUK
zappedagain
  • Locked
  • Question Question
switcher duty cycle - high or low?
Replies
2
Views
215
zappedagain
zappedagain

Part and Inventory Search

Sponsor

Back
Top