[PRCo] Re: Cin

[Boris Cefer]

Then someone ignored basic priciples of the PCC equipment. With a reversed
polarity the apparatus I mentioned would not work properly.

----- Original Message -----
From: "Fred Schneider" <fwschneider at comcast.net>
To: <pittsburgh-railways at dementia.org>
Sent: Tuesday, January 16, 2007 4:58 PM
Subject: [PRCo] Re: Cin


> Sorry Boris, but it did work on PCCs.   It worked in Washington and
> it worked in Cincinnati.
>
> On Jan 16, 2007, at 10:54 AM, Boris Cefer wrote:
>
> > That might work on toys and old streetcars but not on a PCC where
> > the high
> > voltage and low voltage meet at some points, e.g. limit relay and
> > overload
> > relay.
> >
> > B
> >
> > ----- Original Message -----
> > From: "Fred Schneider" <fwschneider at comcast.net>
> > To: <pittsburgh-railways at dementia.org>
> > Sent: Tuesday, January 16, 2007 4:49 PM
> > Subject: [PRCo] Re: Cin
> >
> >
> >> No one has questioned it yet but before they do:  I would assume that
> >> the middle wire is the positive wire and the two outside wires are
> >> negative grounds but it doesn't matter.   Unlike model railroad
> >> motors with permanent magnets for a field, the trolley cars and
> >> trolley buses used series wound motors.   If you reversed the
> >> polarity of the field, you also reversed the polarity of the armature
> >> simultaneously and the car continued to run in the same direction.
> >> So reversing which wire was positive and which was negative had
> >> absolutely no affect.
> >>
> >
> >
>
>
>