AC vs DC coil on large starters
AC vs DC coil on large starters
(OP)
Looking for some feed back on why you would spec out a DC coil or AC coil on a large motor starter (size 5 or 6). I'm old school and back in my day we used DC to avoid vibrational issues associated with AC coil. Don't know if this is still a valid consideration or not. Your opinons will be greatly appreciated.





RE: AC vs DC coil on large starters
The vibration angle is a new one on me.
RE: AC vs DC coil on large starters
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RE: AC vs DC coil on large starters
RE: AC vs DC coil on large starters
Keith Cress
kcress - http://www.flaminsystems.com
RE: AC vs DC coil on large starters
Those contactors do not chatter or drop out when the line is going low during a heavy start.
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: AC vs DC coil on large starters
The contactor manufacturer will choose the coil in the design process and will not change the design for one sale.
The exception would be where your favorite contactor had a DC coil where all others used AC in that size. Spec'ing a coil type that is only available from one maker will effectively steer the selection to your favorite. This is probably not ethical but it is done.
Bill
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Jimmy Carter