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Nostalgia & History > How did they do it? (1)


Date: 11/19/22 15:18
How did they do it? (1)
Author: LarryDoyle

How did PRR engines with 11,000v AC trolley voltage keep their headlight bulbs from quickly burning out?

-LD



Date: 11/19/22 15:34
Re: How did they do it? (1)
Author: krm152

LarryDoyle Wrote:
-------------------------------------------------------
> How did PRR engines with 11,000v AC trolley
> voltage keep their headlight bulbs from quickly
> burning out?
>
> -LD

According to the Wikipedia GG-1 article, "A transformer between the two cabs stepped-down the 11,000 V to the voltages needed for the traction motors and other equipment."
Here is a link to that article: https://en.wikipedia.org/wiki/Pennsylvania_Railroad_class_GG1
ALLEN

 



Date: 11/19/22 15:37
Re: How did they do it? (1)
Author: train1275

Transformers and resistors.

I think the bulbs were originally 32Vdc, probably later 74Vdc.



Edited 1 time(s). Last edit at 11/19/22 15:37 by train1275.



Date: 11/19/22 15:47
Re: How did they do it? (1)
Author: krm152

train1275 Wrote:
-------------------------------------------------------
> Transformers and resistors.
>
> I think the bulbs were originally 32Vdc, probably
> later 74Vdc.

There is no difference between AC and DC when it comes to light bulbs.
ALLEN
 



Date: 11/19/22 16:18
Re: How did they do it? (1)
Author: wcamp1472

The same way the 110,000vac commercial transmission lines' power doesn't
blow-up your house.. 
Transformers ...

One of many of Nicola Tesla's inventions ....

Duhhh!

W.

 



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