What determines the power factor of a transformer under load?
Asked: January 25, 2026 at 7:30 pm by David Lee
- This topic has 1 reply, 2 voices, and was last updated 12 hours, 6 minutes ago by Gabriel Silva.
Answers
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January 25, 2026 at 7:42 pm by Gabriel Silva
Under load, transformer power factor is mainly determined by the connected load’s PF plus the transformer’s own magnetizing current. At higher loading, the load’s PF dominates; inductive motor loads or poorly compensated plants yield lower PF. The magnetizing branch and leakage reactance add lagging reactive demand. Capacitor banks or synchronous condensers may be installed upstream to correct overall PF seen by the utility, improving system efficiency and reducing penalties.
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