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Re: (ET) HA26E15HA Reverse problem



Maybe I'm on the wrong page here, but from the diagram I have in front of me, that series of E-15 possesses neither a Reverse Relay, or a Field Weakening Relay.


Puzzled In Pennslowmania..

----- Original Message ----- From: "David Roden" <etpost drmm net>
To: <elec-trak cosmos phy tufts edu>
Sent: Saturday, September 10, 2005 2:00 PM
Subject: Re: (ET) HA26E15HA Reverse problem


Sounds like the reverse relay contacts are burnt.  The symptoms suggest
little or no shunt field power in reverse.  This is a very common problem.

If your FW relay is identical to the reverse relay (mine was), I think you
can temporarily exchange them to see if the symptoms disappear.

A warning - the motor armature should never be powered up without an
operating field. You will overheat and damage the motor if you keep trying
to run it that way.  I hope you haven't already done so.  (IMO, GE should
have included some kind of safety circuit to inhibit start contactor pull-in
unless it detected normal field current.)


David Roden - Akron, Ohio, USA

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