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Example of an installation before and after power-factor correction

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General rules of electrical installation design
Connection to the MV utility distribution network
Connection to the LV utility distribution network
MV and LV architecture selection guide for buildings
LV Distribution
Protection against electric shocks and electrical fires
Sizing and protection of conductors
LV switchgear: functions and selection
Overvoltage protection
Energy Efficiency in electrical distribution
Power Factor Correction
Power harmonics management
Characteristics of particular sources and loads
PhotoVoltaic (PV) installation
Residential premises and other special locations
ElectroMagnetic Compatibility (EMC)
Measurement

[a] The arrows denote vector quantities.
[b] The cos φ of the workshop remains at 0.75 but cos φ for all the installation upstream of the capacitor bank to the transformer LV terminals is 0.928. As mentioned in Sub-clause 6.2 the cos φ at the HV side of the transformer will be slightly lower (particularly in the pre-corrected case), due to the reactive power losses in the transformer.

Fig. L28Technical-economic comparison of an installation before and after power-factor correction