RE: (ET) sticky relays

["Steven Naugler" <snaugler earthlink net>]

Neil and other GE folks,
        36 V will only bite you if you are wet or if you puncture your 
skin and
expose your internal wetness.  Internally we are all very conductive, but
dry skin is not very conductive.
        The resistance of human skin is why Detroit is investigating 48 
VDC as the
next automotive electric system voltage for internal combustion engined
vehicles.  Road going EVs need much higher voltages to keep drive motor
currents reasonable, so they have very dangerous voltages.

Steve Naugler


> [Original Message]
> From: Neil Dennis <wombat RealNS com>
> To: Elec-trak <elec-trak cosmos5 phy tufts edu>
> Date: 5/29/00 2:36:34 PM
> Subject: (ET) sticky relays
>
> I just had an hour or so debug session with my E-12.  I would drop into
> first speed and keep going when I raised off the seat opening the safety
> switch, also the brake would not shut down the motor.  After reading
> about welded solenoids here I thought OK that is the problem - so after
> much checking and reading schematic, I traced to "2RTN" not traveling
> far enough to open the normally open contacts.  After replacing with a
> spare that didn't close properly so I still had to do some adjusting,
> now things work right.  Incidentally, open the disconnect when fingering
> around in the control box, 36 volts does bite a little. (experience)
> 
> wombat
> 



--- Steven Naugler
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