TELECOM Digest OnLine - Sorted: Re: 25 Hz power

Re: 25 Hz power

Al Gillis (
Fri, 10 Mar 2006 11:07:14 -0800

Hi Wes ...

Sorry for the off-topic question but could you detail some of the
advantages you mentioned?

I know the Great Northern Railroad used electric locomotives through
mountain passes in Washington State because electrical locos could out
pull steam locomotives on the steep grades encountered there.



<> wrote in message

> In a message dated Wed, 8 Mar 2006 12:45:38 CST, jsw
> <> writes:

>> In NYC up into the 70's at least, power for two of the subway
>> divisions (BMT and IRT) was generated at 25Hz but converted to DC in
>> the field.

> Some electrified intercity railroads in the Northeast used 25 Hz
> power. There are, or at least were in the past, some advantages to 25
> Hz power for running locomotives. (Some railroads in other parts of
> the world use or used 16-2/3 HZ power.

(Many deletions from here down!)

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