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Re: Contactor question
- To: tesla@xxxxxxxxxx
- Subject: Re: Contactor question
- From: "Tesla list" <tesla@xxxxxxxxxx>
- Date: Sun, 14 Aug 2005 23:36:06 -0600
- Delivered-to: testla@pupman.com
- Delivered-to: tesla@pupman.com
- Old-return-path: <vardin@twfpowerelectronics.com>
- Resent-date: Sun, 14 Aug 2005 23:41:42 -0600 (MDT)
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Original poster: Mddeming@xxxxxxx
Hi David,
In theory, yes; in practical circuit, problems. There is no such
thing as a perfectly synchronized multi-pole mechanical relay. The
difference may be only a msec, but the first one to close and the
last one to open will get a spike of the full load. Over time this
may result in burning/spot welding of the contacts.
Matt D.
In a message dated 8/14/05 6:49:39 P.M. Eastern Daylight Time,
tesla@xxxxxxxxxx writes:
Original poster: "David Rieben" <drieben@xxxxxxxxxxxxxxx>
Hi all,
Just a quick question about relay contactors. Let's say that I have
a 4-pole, 30 FLA inductive per pole rated contactor. Does this mean
that I will have up 120 amp inductive rating of the contact points if I
use all 4 of the poles in a parallel or series parallel fashion in a single
circuit to switch my pole pig transformer under a load?
Thanks,
David Rieben