![]() ![]() Specifying equipment loads, fuses, and wiring sizes you use the VA, or the rms To know how much the electricity is costing you, you use watts. Moment in time and take the average over time, i.e. ![]() Have to calculate the watts by multiplying the volts times the amps at each So in AC, if the volts and amps are not precisely in phase you You have reactive circuit elements the current can't keep up with the voltage,īut lags behind. Stops at the peak, but the greatest velocity is at the bottom of the arc. The greatest force is applied when the swing The peak of the voltage curve is does not happen at the peak of the currentĬurve). In AC, the volts and amps are not always in phase (meaning that Volts and amps are in phase (for example a resistive load) then the equation is The concept however has been expanded and extended cover some of the subleties Is volts times amps, what is VA? VA (or volt-amps) is also volts times amps, Supplies, battery packs, battery chargers, AC Adapters, and power supplies for How to Convert Kilowatt to Horsepower (metric)Įxample: convert 15 kW to horsepower (metric):ġ5 kW = 15 × 1.3596216173 horsepower (metric) = 20.How to convert VA to Watts and KVA to Kilowatts Convert Watts to VA Convert VA to Watts Convert VA To Amps Convert Amps to VA Convert KVA to KW Convert Kilovolt-Amps to Kilowatts Convert Amps to KVA Convert Watts to KVA Convert 3-phase Amps to KVAģ-phase inverters 115VAC to 415VAC outputĪnd 24V input electronic ballast for 20W and 40W fluorescent lampsĬustom design and manufacture of state-of-the-art power Kilowatt to Horsepower (metric) Conversion Table Kilowatt The term was later expanded to include other types of output power such as the imperial and metric horsepower measurements commonly used today. ![]() It is believed that Watt built on this idea and introduced the term horsepower, largely in an effort to market his steam engine. As early as 1702, Thomas Savery referenced horses when describing the output of an engine. Watt was not the first person to compare the output of horses to that of engines. History/origin: The term horsepower was adopted in the late 18 th century by James Watt to compare the output of steam engines with the power of draft horses. In addition, when rating electric motors, one horsepower is equal to 746 watts. Boiler horsepower, albeit a less common measurement than either imperial or metric horsepower, is used for rating steam boilers, and is equivalent to 34.5 pounds of water evaporated per hour at 212 degrees Fahrenheit, or 9809.5 watts. lbf/s), while metric horsepower is approximately 735.5 watts (75 kgf.Mechanical horsepower, also known as imperial horsepower, is defined as approximately 745.7 watts (550 ft Horsepower (metric)ĭefinition: The unit horsepower (symbol: hp) is a unit of measurement of power (the rate at which work is done). Megawatt or gigawatt hours may be used in larger buildings or for industrial applications. Electricity used by a home is typically measured in kilowatt hours, or kWh, meaning 1000 watts being applied over a period of one hour. He defined the unit within the system of units being used at the time, and his definition was adopted in 1908.Ĭurrent use: Kilowatts are used worldwide, typically to express the output power of engines and the power of electric motors, tools, machines, and heaters. This was first proposed in 1882 by Sir Charles William Siemens, an engineer and entrepreneur, who suggested the use of Watt's name as a unit of power. History/origin: The base unit of the kilowatt is the watt, which was named after a Scottish inventor named James Watt. As is consistent with SI units, the prefix kilo- means that a kilowatt equals one thousand watts or one thousand joules per second. The base unit of the kilowatt is the watt, which was named after Scottish inventor James Watt. ![]() Definition: A kilowatt (symbol: kw) is a unit of power in the International System of Units (SI). ![]()
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