[PRCo] Re: The "Light Rail ex-1600 1700s"

[Boris Cefer]

This is not exactly true. The battery is not the main source of 32 V energy
for car control etc. It is the MG set which provides the energy for car
control and the battery is being permanently charged to provide sufficient
capacity for emergency or when the control is then off and some low voltage
circuits are in use. This is probably why sometimes it is called "storage
battery".
Adding further 32 V circuits will not only suck dry the battery at a higher
rate, but also the MG set will suffer overload and higher rate of failures.
I think they had a similar problem in Toronto when they converted interior
lights from 600 V to 32 V.

B

----- Original Message -----
From: "Jim Holland" <prcopcc at p-r-co.com>
To: "- 1714 PRCo__WP__JTC -" <pittsburgh-railways at dementia.org>
Sent: Thursday, January 04, 2007 10:37 PM
Subject: [PRCo] Re: The "Light Rail ex-1600 1700s"


> Generally when an electric / electronic part fails it is like a light
> bulb    ----    working one minute, totally out the next.
> Exceptions, yes, but this is the rule.
> .
> What you describe, Herb, is not failure of bad parts but Over Load of
> the battery which is slowly // Not So Slowly being sucked dry!!!
> Original PCC lighting was from the 600 overhead  --  go through an
> insulator and the lights would flicker  --  lose the pole and the lights
> went out.       Putting lighting and other additional items on a
> battery, And  'Apparently'  the battery used for control circuits is
> asking for trouble    ----    That's why the car went dead    ----    it
> was not failure of parts    ----    It  WAS  the fault of the designer
> and  ({[pat]})   I-S  to blame!!!
> .
> The PCC accelerator also provides dynamic brakes  --  the accelerator is
> operated by a 32 volt pilot motor which works off the battery  --  when
> the battery goes dry, so does control.       On an All-Electric, the
> drums won't release as drums are spring applied, electrically released
> By Battery!       Don't know how that is handled on an air car.
> .
> The problems you experienced with the ex-1601 series PCCs converted to
> 177x+++ were created by  ({[pat]})  and were not inherent in the car
> when under PRCo.       A separate battery should have been used, not the
> control battery.
> .
> .
> .
> Jim___Holland