vibration reed frequency meter to display 60 Hz and 400Hz. The insides were protected for Jungle use, and the one I have, (TS-382/F)has heat strips to drive moisture out of the cabinet.
Niagara Falls use to send out 25 Hz power.. (maybe three phase, but I couldn't find a reference.)
George H.
The New York Central System was still using 25HZ 3 phase power transmission as late as 1970 (the trains used 600+ volts of DC to the third rail via cycloconverters) The last time I was up there was 2005 and the station lights weren't flickering and they didn't have incandescent bulbs, so they may have changed the frequency.
There was very noticeable flicker with incandescent light bulbs at 25 HZ
Looks like they still use 25 HZ...
The Sitras SFC Plus frequency converters transform 60 Hz power into
then transferred from Metuchen to the various systems that power [catenary] on the NEC. The upgraded converter technology enables
from 25 MW to 85 MW.
2018:
a vibration reed frequency meter to display 60 Hz and 400Hz. The insides w ere protected for Jungle use, and the one I have, (TS-382/F)has heat strips to drive moisture out of the cabinet.
,lectricity is
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17 or 25Hz gives large motors better get-going ability from start. The puls es help overcome stiction.NT
a vibration reed frequency meter to display 60 Hz and 400Hz. The insides we re protected for Jungle use, and the one I have, (TS-382/F)has heat strips to drive moisture out of the cabinet.
Yes, 25Hz was common a century ago, it was used for large motors to get bet ter torque at low speeds. It was common in mining towns, since it was need ed for the mining equipment. It wasn't produced by military style mobile or portable generators. The Sinewave generators had frequency meters for accu rate testing of AC line components. It was common to buy radios, clocks and kitchen appliances made for 25Hz for the areas that used it. Those radios till show up as antiques, because they also worked on 60Hz. The same radio was often built in two models, with the regular 60Hz transformer, or the mu ch larger 25Hz version that cost more. The Military used 60Hz for land base d generators and 400Hz for aircraft to reduce the size and weight of motors and transformers.
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a vibration reed frequency meter to display 60 Hz and 400Hz. The insides w ere protected for Jungle use, and the one I have, (TS-382/F)has heat strips to drive moisture out of the cabinet.
,lectricity is
y,
on-power-station/
Would you try to power any of that from a portable Sinewave generator?
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ad a vibration reed frequency meter to display 60 Hz and 400Hz. The insides were protected for Jungle use, and the one I have, (TS-382/F)has heat stri ps to drive moisture out of the cabinet.
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lses help overcome stiction.
Modern VFD drives do the same thing, but one again, the mechanical meters w ere in signal generators to test components at the proper frequency, for th e US military. Look at Japan. Part of it is 50Hz. The other part is 60Hz, b ecause that was whhat our military set up, after WW-II for their use follow ing the end of the fighting.
The actual traction motors use DC, not AC.
I suspect that may be changing because it sounds like modern subway cars are being fitted with DC to 3 phase to run the motors, but the third rail is still DC.
ote:
had a vibration reed frequency meter to display 60 Hz and 400Hz. The inside s were protected for Jungle use, and the one I have, (TS-382/F)has heat str ips to drive moisture out of the cabinet.
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ulses help overcome stiction.
There ere no third rails in mines. Just very large and heavy flexible HV ca bles. Read about some of the largest coalmines, like the Peabody Coal compa ny had. There was even a song written about it.
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