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Technical Courses

Maintenance of LV and MV Capacitor Bank

Under normal operating conditions certain electrical loads (e.g. induction motors, welding equipment, arc furnaces and fluorescent lighting) draw not only active power from the supply, but also inductive reactive power (kvar). This reactive power is necessary for the equipment to operate correctly but could be interpreted as an undesirable burden on the supply. The power factor of a load is defined as the ratio of active power to apparent power, i.e. kW, kVA and is referred to as cosφ. The closer cosφ is to unity, the less reactive power is drawn from the supply:

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