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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 Bahamas: A, B 120 V 208 V 60 Hz Bahrain: G 230 V 400 V 50 Hz Bangladesh: A, C, D, G 220 V 380 V 50 Hz Barbados: A, B 115 V 200 V 50 Hz Belarus: C, F 230 V [10] 400 V 50 Hz Belgium: C, E NBN C 61 112-1: 230 V 400 V 50 Hz Belize: A, B, G 110 V 220 V 190 V 380 V 60 Hz Benin: C, E 220 V 380 V 50 Hz Bermuda: A, B 120 V
AC power Supplies can also be used to change the frequency as well as the voltage, they are often used by manufacturers to check the suitability of their products for use in other countries. 230 V 50 Hz or 115 60 Hz or even 400 Hz for avionics testing.
A 50 Hz ±5 Hz vibrating-reed mains frequency meter for 220 V. The world's first public electricity supply was a water wheel driven system constructed in the small English town of Godalming in 1881. It was an alternating current (AC) system using a Siemens alternator supplying power for both street lights and consumers at two voltages, 250 V ...
A passive electric power adapter, sometimes called a travel plug or travel adapter, allows using a plug from one region with a foreign socket. As other countries supply 120-volt, 60 Hz AC, using a travel adapter in a country with a different supply poses a safety hazard if the connected device does not support both input voltages.
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.
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