[PRCo] Re: voltage and frequency

[Boris Cefer]

I am not so far experienced, but 16 2/3 Hz (some time back it was changed a 
little to 16.7 Hz to avoid reverb) allowed to use DC motors with alternating 
current without rectifiers. And there were also other reasons. I found a 
nice article on this subject but it is in a wrong language.

Boris
not so far experienced non electrician

----- Original Message ----- 
From: "John Swindler" <j_swindler at hotmail.com>
To: <pittsburgh-railways at dementia.org>
Sent: Wednesday, August 29, 2007 6:13 PM
Subject: [PRCo] Re: voltage and frequency


>
> Thanks, Boris
>
> So the connection I was suspecting -----  wasn't.
>
> So was there any connection between railroad using 16 2/3 Hz and European
> grid using 50Hz, which is three times greater??   Or again, no connection,
> it just happened??
>
> John, inexperienced non-electrician
>
>
>
>
>>From: "Boris Cefer" <westinghouse at iol.cz>
>>Reply-To: pittsburgh-railways at dementia.org
>>To: <pittsburgh-railways at dementia.org>
>>Subject: [PRCo] Re: voltage and frequency
>>Date: Wed, 29 Aug 2007 14:26:28 +0200
>>
>>The value of 16 2/3 Hz came originally from rotary sources (alternators) 
>>of
>>energy owned by railroads. The electricity did not come from public grid
>>originally.
>>
>>B
>>(experienced non electrician)
>>
>>----- Original Message -----
>>From: "John Swindler" <j_swindler at hotmail.com>
>>To: <pittsburgh-railways at dementia.org>
>>Sent: Wednesday, August 29, 2007 2:18 PM
>>Subject: [PRCo] Re: voltage and frequency
>>
>>
>> >
>> >
>> >
>> > Any electricians who can comment if there is any significance that the
>> > railways operate at 1/3 the Hz of the public energy grid?  Maybe single
>> > phase tapping from three phase????
>> >
>> > Just wondering?????
>> >
>> > John, non electrician