Re: (ET) sticky relays

["MR23=Christopher Meier \(Mtka, MN, USA\)" <mr23 worldspy net>]

That's 42 volts, not 48v.    36v nominal, 42volts under charge (via
alternator)
(compared to 12v and 14v).

Christopher M. Meier

----- Original Message -----
From: "Steven Naugler" <snaugler earthlink net>
To: "Elec-trak" <elec-trak cosmos5 phy tufts edu>; "Neil Dennis"
<wombat RealNS com>
Sent: Monday, May 29, 2000 5:00 PM
Subject: RE: (ET) sticky relays


> 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
> --- snaugler earthlink net
> --- EarthLink: It's your Internet.
>
>
>