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Movies (shot at 24 frames per second) are converted to television (roughly 50 or 60 fields [B] per second). To convert a 24 frame/sec movie to 60 field/sec television, for example, alternate movie frames are shown 2 and 3 times, respectively. For 50 Hz systems such as PAL each frame is shown twice. Since 50 is not exactly 2×24, the movie will ...
The waveform of 230 V and 50 Hz compared with 120 V and 60 Hz. The utility frequency, (power) line frequency (American English) or mains frequency (British English) is the nominal frequency of the oscillations of alternating current (AC) in a wide area synchronous grid transmitted from a power station to the end-user.
Transformers do not change the frequency of electricity; in many regions with 100–120 V, electricity is supplied at 60 Hz, and 210–240 V regions tend to use 50 Hz. This may affect operation of devices which depend on mains frequency (some audio turntables and mains-only electric clocks, etc., although modern equipment is less likely to ...
50 Hz – PAL video 60 / 1.001 Hz ~= 59.94 Hz – NTSC video Video digital-to-analog converters operate in the megahertz range (from ~3 MHz for low quality composite video scalers in early games consoles, to 250 MHz or more for the highest-resolution VGA output).
Utility frequency conversion - if a user in (say) a 50 Hz country needs a 60 Hz supply to power equipment that is frequency-specific, such as a small motor or some electronics, it is possible to convert the frequency by running an inverter with a 60 Hz output from a DC source such as a 12V power supply running from the 50 Hz mains.
Often airplanes use 400 Hz power so a 50 Hz or 60 Hz to 400 Hz frequency converter is needed for use in the ground power unit used to power the airplane while it is on the ground. Airlines might also utilize the converters to provide in-air wall current to passengers for use with laptops and the like.
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60 Hz 50 Hz [33] Conversion of 50 Hz distribution to 60 Hz is ongoing. [34] Haiti: A, B 110 V 220/380 V 110/220 V 60 Hz Honduras: A, B 110 V 208 V 230 V 240 V 460 V 480 V 60 Hz Hong Kong: G D, M [35] BS 1363 BS 546 220 V 380 V 50 Hz Type G is most common. Hungary: C F MSZ EN 50075 MSZ 9781-2 230 V 400 V 50 Hz Iceland: C, F 230 V 400 V