[PRCo] Re: Cin

[Fred Schneider]

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.
>>
>
>