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Re: (ET) E15 will not run

There is, but it blows up fast. A huge DPDT contactor would work, but I really think a circuit could be designed to not allow the relay to switch unless field voltage was flat zero. Easy to do for reverse, but not going back into forward. 

C

On 9/1/2021 2:56 PM, Ken Olum wrote:

    From: Chris Zach via Elec-trak <elec-trak cosmos phy tufts edu>
    Date: Wed, 1 Sep 2021 14:37:41 -0400

    Only annoying thing about the E15 is how it fries relays when going 
from
    F to Reverse. Unless you are totally stopped the field coil will burn 
up
    the relay.

Isn't there supposed to be a varistor or something to protect the relay
from this damage?

                                         Ken

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