[PRCo] Re: PCC Control

[Boris Cefer]

There are practically no secrets as for how the PCCs work, but these 
articles are always very interesting to read, perhaps better than Stephen 
King.

B

----- Original Message ----- 
From: "Fred Schneider" <fwschneider at comcast.net>
To: <pittsburgh-railways at dementia.org>
Cc: "Taplin Mike" <miketap at globalnet.co.uk>
Sent: Wednesday, May 16, 2007 4:08 AM
Subject: [PRCo] Re: PCC Control


> Bob and anyone else crazy enough to tune in to this station:
>
> There was an two or three old old issues of Modern Tramway with a
> pieces by W. J. (Jack) Wyse that explained all this.   They covered
> both the high voltage and the low voltage (32 volt) wiring on a pre-
> war PCC and it was probably the best explanation that appeared in
> print anywhere.   But it takes a whole bunch of evenings looking at
> the wiring diagrams before it all sinks in.    It explains the
> sequence of all the motoring, braking and field shunting contactors
> and what they do.  It was very wordy but that is necessary for a very
> complex subject.    It was almost essential that you have a prior
> course in physics or electronics before you read the articles.   Jack
> never wrote a subsequent dissertation that covered the changes needed
> for extended dynamic braking.
>
> I don't remember when it was published but perhaps Mike Taplin can
> come back to us with a citation.    It was sometime back in the 1960s.
>
>
>
> F3