Befähigungsprüfung Elektrotechnik Practice Questions - Befähigungsprüfung Für Das Reglementierte Gewerbe Elektrotechnik (Österreich) Exam

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What is the physical and economic consequence of operating an industrial facility with an uncompensated, low power factor (e.g., cos φ = 0.65 inductive)?

Active power consumption increases while line currents decrease. Line currents and I²R distribution losses increase, causing voltage drops and utility reactive energy penalty charges. Transformer core saturation occurs, reducing the system operating frequency. Insulation resistance across protective earth conductors breaks down proportionally to inductive reactance.

Correct Answer:

Line currents and I²R distribution losses increase, causing voltage drops and utility reactive energy penalty charges.

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