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wascapacitor ______power factor capacitor

12 juillet 2013

Power Factor Correction Equipment-power capacitors

General

Under normal operating conditions certain electrical loads draw not only active power from the supply (kilowatts kW) but also reactive power (reactive kVA, kVAr). This reactive power has no useful function, but is necessary for the equipment to operate correctly. Loads such as induction motors, welding equipment, arc Capacitors for power Factor Correction furnaces and fluorescent lighting would fall into this category.

Correction

Opposing reactive power resulting from the connection of a correctly sized capacitor can compensate for the reactive power required by the load. This power capacitor ensures that only a small amount of reactive power is drawn from the supply.

Purpose

An apparent reduction in the total current drawn from the supply can be achieved as a result of connecting a capacitor to an inductive load.

Definition

The Power Factor of a load is defined as being the ratio of active power to total demand, that is to say kW + kVA. The uncorrected power factor of a load is cos Ø1 (where Ø1 is the phase angle between the uncorrected load and unity), and the power film capacitor corrected power factor is cos Ø2 (where Ø2 is the phase angle between the corrected load and unity). The nearer the ratio kW+kVA=cos Ø is to unity, the less reactive power is drawn from the supply.

Reactive Power Penalty Charges

The Reactive Power charge is the means by which consumers with a poor power factor pay more for their electricity than consumers with a good power factor. From April 2010, a common charging method is in force across all UK Electricity Supply Companies.

This applies to ALL half-hourly metered consumers. If your electricity bill does not yet include a charge for Reactive Power, this WILL be introduced over the coming months.

By installing power factor correction equipment and ensuring that the average power factor is better than 0.95 lagging, no ‘excess’ reactive power is consumed. Smaller capacitor stages ensure that these charges are avoided under almost all load conditions.

This means that ALL excess Reactive Power charges are avoided. http://www.wascapacitor.com

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