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

[Jim Holland]

Thank You for the clarification!       The point seems to remain that 
the circuit was overloaded which is Not part of the original design and 
was corrupted by  ({[pat.]})



Boris Cefer wrote:
.

> 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
>