Transcription of Power Factor Correction - Institution of Engineering and ...
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Power Factor Correction - Institution of Engineering and ...
Power FACTORCORRECTION22 IEE Wiring Matters |Spring 2006 | Factor is the ratio between the useful (true) Power (kW) to the total (apparent) Power (kVA)consumed by an item of electrical equipment or acomplete electrical installation. It is a measure of howefficiently electrical Power is converted into usefulwork output. The ideal Power Factor is unity, or less than one means that extra Power isrequired to achieve the actual task at current flow causes losses both in the supplyand distribution system. A load with a Power Factor results in the most efficient loading of the load with a Power Factor of, say, , results in muchhigher losses in the supply system and a higher billfor the consumer. A comparatively small improvementin Power Factor can bring about a significantreduction in losses since losses are proportional to thesquare of the the Power Factor is less than one the missing Power is known as reactive Power whichunfortunately is necessary to provide a magnetisingfield required by motors and other inductive loads toperform their desired functions.
Power factor explained Consider a single-phase induction motor. If the motor presented a purely resistive load to the supply, the current flowing would be in-phase with the voltage. This is not the case. The motor has a magnet and the magnetizing current is not in phase with the voltage.
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