We use cookies to improve your experience and analyse website traffic. What is kVA and How is it Calculated? Share this Post. Got it! In the case of a 1. In the case of a 0. Deploying systems that have higher power factors result in less electrical loss and can help improve your Power Usage Effectiveness PUE. The resulting real power is kilowatts. Subscribe to CoreSite Share. What is Data Center Redundancy?
Subscribe to CoreSite. The KW over time give kilowatt-hours kWh , which represent the energy used over a given time period. When voltage and current are in phase, the kilovolt amperes KVA equal the kilowatts KW , or the power used in the electrical circuit.
When voltage and current are out of phase, the KVA are higher than the KW and give the apparent power that has to be multiplied by the power factor to get the KW.
As long as the voltage and current rise and fall together, they are in phase and produce real power. In such a case, the KVA power, obtained by multiplying the voltage and current together and dividing by 1,, is equal to the KW power. This is the case for home appliances for which power consumption is normally given in KW. For some electric loads, such as large industrial motors, the voltage and current are not in phase. Instead, the voltage in a typical AC circuit rises, but the current is held back by the magnetic field of the motor.
When the voltage and current are out of phase, they produce less real power although the electrical circuit still contains the same voltage and current values. As a result, the KVA power, or the apparent power based on the voltage and current, is higher than the real power. To compensate, the KVA power is multiplied by the power factor, expressed as a decimal between zero and one. Typical power factors for large industrial loads are 0. A steel mill might want to run a large motor for rolling out thin sheets of steel.
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