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Map of Japan's electricity transmission network, showing differing systems between regions. Electricity transmission in Japan is unusual because the country is divided for historical reasons into two regions each running at a different mains frequency. [10] Eastern Japan has 50 Hz networks while western Japan has 60 Hz networks.
50 Hz 60 Hz East Japan 50 Hz (Tokyo, Kawasaki, Sapporo, Yokohama, and Sendai); West Japan 60 Hz (Okinawa, Osaka, Kyoto, Kobe, Nagoya, Hiroshima). 120 V in military facilities in Okinawa. [48] Majority of sockets accept only type A plugs. See Energy in Japan for more. Jersey: G 230 V 400 V 50 Hz Jordan: B, C, D, F, G, J 230 V 400 V 50 Hz
Location of Higashi-Shimizu and Japan's two utility frequencies Schematic of Higashi-Shimizu Frequency Converter. Higashi-Shimizu Frequency Converter (東清水変電所, Higashi-Shimizu Hendensho) is the third facility in Japan for interconnecting the power grid of eastern Japan, which operates at 50 hertz, and that of western Japan, which operates at 60 hertz.
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.
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.
Japan's conventional mainline railway network schematic map showing electrification systems with voltages and frequencies as of 2017. Third-sector railways are included. Shinkansen exclusive-use trackage is not included. Municipal subways and other rapid transit networks are not included. Private railways are not included.
The standard voltage at power outlets is 100 V, but the grids operate at different frequencies: 50 Hz in Eastern Japan and 60 Hz in Western Japan. [99] The grids are connected together by three frequency converter stations ( Higashi-Shimizu , Shin Shinano and Sakuma ), but these can only handle 1 GW in total. [ 100 ]
Location of Shin-Shinano and Japan's two utility frequencies. Shin-Shinano Frequency Converter (新信濃変電所, Shin Shinano Hendensho) is the designation of a back-to-back high-voltage direct current (HVDC) facility in Japan which forms one of four frequency converter stations that link Japan's western and eastern power grids.