From: "RJ Kanary" <rjkanary nauticom net>
To: <elec-trak cosmos phy tufts edu>
Subject: (ET) Re: ET Reliability
Date: Thu, 4 Nov 2004 23:30:54 -0500
Before everyone starts ripping their E20's from fwd to reverse for
fun..........
The difference between the E20 and the E15 is that the E15 switches
field current to reverse, the E20 switches armature current. Field
current is small by comparison, and is thus switched by a small DPDT
relay.
Well, not ALL of the E-15 models are configured that way.<G>
E-15 models HA and later use single coil reversing armature contactors.
Any operation of the type described is NEVER in the best
interests of longevity. For either control system. However, the point
being made is that the armature reversing configuration WILL forgive the
occasional momentary lapse of reason.
The field reversing types though, well, they tend to not deal
well with that style of operation. :(
RJ Kanary Bandi Bros. Inc.
Member TRNi Since 1998
ASE® Certified Master Auto Technician
rjkanary nauticom net
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