polyphase power meter

См. также в других словарях:

• Power factor — For other uses, see Power factor (pistol). The power factor of an AC electric power system is defined as the ratio of the real power flowing to the load over the apparent power in the circuit,[1][2] and is a dimensionless number between 0 and 1… …   Wikipedia

• Electricity meter — Typical North American domestic analog electricity meter …   Wikipedia

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• List of Tesla patents — Below is a list of Tesla patents. Dr. Nikola Tesla was an inventor who obtained around 300 patents [Snezana Sarbo, [http://www.tesla symp06.org/papers/Tesla Symp06 Sarboh.pdfNikola Tesla s Patents] , Sixth International Symposium Nikola Tesla,… …   Wikipedia

• Mains electricity — A table lamp connected to a wall socket (the mains). Mains is the general purpose alternating current (AC) electric power supply. In the US, electric power is referred to by several names including household power, household electricity,… …   Wikipedia

• War of Currents — In the War of Currents era (sometimes, War of the Currents or Battle of Currents ) in the late 1880s, George Westinghouse and Thomas Edison became adversaries due to Edison s promotion of direct current (DC) for electric power distribution over… …   Wikipedia

• Electricity distribution — is the penultimate stage in the delivery (before retail) of electricity to end users. It is generally considered to include medium voltage (less than 50 kV) power lines, electrical substations and pole mounted transformers, low voltage (less than …   Wikipedia

• Transformer types — Circuit symbols Transformer with two windings and iron core. Step down or step up transformer. The symbol shows which winding has more turns, but not usually the …   Wikipedia

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