enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Power factor - Wikipedia

    en.wikipedia.org/wiki/Power_factor

    To get 1 kW of real power at 0.2 power factor, 5 kVA of apparent power needs to be transferred (1 kW ÷ 0.2 = 5 kVA). This apparent power must be produced and transmitted to the load and is subject to losses in the production and transmission processes.

  3. Volt-ampere - Wikipedia

    en.wikipedia.org/wiki/Volt-ampere

    In direct current (DC) circuits, this product is equal to the real power, measured in watts. [3] The volt-ampere is dimensionally equivalent to the watt: in SI units, 1 V⋅A = 1 W. VA rating is most used for generators and transformers, and other power handling equipment, where loads may be reactive (inductive or capacitive).

  4. Orders of magnitude (power) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(power)

    kilo-(kW) 1–3 × 10 3 W tech: heat output of a domestic electric kettle: 1.1 × 10 3 W tech: power of a microwave oven: 1.366 × 10 3 W astro: power per square meter received from the Sun at the Earth's orbit: 1.5 × 10 3 W tech: legal limit of power output of an amateur radio station in the United States up to 2 × 10 3 W

  5. Electric power distribution - Wikipedia

    en.wikipedia.org/wiki/Electric_power_distribution

    In the UK a typical urban or suburban low-voltage substation would normally be rated between 150 kVA and 1 MVA and supply a whole neighbourhood of a few hundred houses. Transformers are typically sized on an average load of 1 to 2 kW per household, and the service fuses and cable is sized to allow any one property to draw a peak load of perhaps ...

  6. Units of energy - Wikipedia

    en.wikipedia.org/wiki/Units_of_energy

    A unit of electrical energy, particularly for utility bills, is the kilowatt-hour (kWh); [3] one kilowatt-hour is equivalent to 3.6 megajoules.Electricity usage is often given in units of kilowatt-hours per year or other periods. [4]

  7. Motor constants - Wikipedia

    en.wikipedia.org/wiki/Motor_constants

    But, since power is also equal to force multiplied by speed, the force of the linear motor is = / or = /. The inverse relationship between force per unit current and K v {\displaystyle K_{\text{v}}} of a linear motor has been demonstrated.

  8. Orders of magnitude (current) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(current)

    230 V AC, toaster, kettle (2 kW) 10 1: 10 or 20A 230 V AC, Europe common domestic circuit breaker rating 15 or 20A 120 V AC, United States, Canada and Mexico domestic circuit breaker rating 16.6A 120 V AC, toaster, kettle (2 kW) 20A 230 V AC, Immersion heater (4.6 kW) 24A 12V DC, PC, High-performance graphics card (288W) 38.3A

  9. Kilowatt-hour - Wikipedia

    en.wikipedia.org/wiki/Kilowatt-hour

    A kilowatt-hour (unit symbol: kW⋅h or kW h; commonly written as kWh) is a non-SI unit of energy equal to 3.6 megajoules (MJ) in SI units, which is the energy delivered by one kilowatt of power for one hour. Kilowatt-hours are a common billing unit for electrical energy supplied by electric utilities.