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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
Today most 60 Hz systems deliver nominal 120/240 V, and most 50 Hz nominally 230 V. The significant exceptions are in Brazil, which has a synchronized 60 Hz grid with both 127 V and 220 V as standard voltages in different regions, [ 20 ] and Japan, which has two frequencies : 50 Hz for East Japan and 60 Hz for West Japan.
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.
This map reflects the nominal voltage of residential buildings of most countries. In the USA and Canada, there are 2 nominal voltages: 120V and 240V concurrently. This is not a 3 phase system and 240V is not a phase-phase voltage. This system is unique and is only used in certain parts of the world. 230/380V in Europe does not use a similar system.
Unlike a three-wire distribution system, the grounded neutral is not distributed to the loads; only line-to-line connections at 120 V are used. A balanced power system is used only for specialized distribution in audio and video production studios, sound and television broadcasting, and installations of sensitive scientific instruments.
Amtrak’s 60 Hz traction power system operates along the Northeast Corridor between New Haven, Connecticut, [note 1] and Boston, Massachusetts. This system was built by Amtrak in the late 1990s and supplies locomotives with power from an overhead catenary system at 25 kV alternating current with at 60 Hz, the standard frequency in North America.