Ferro resonance

In transformers, an over-voltage condition that can occur when the core is excited through capacitance in series with the inductor. This is especially prevalent in transformers that have very low core losses. It can generally be prevented by having a lo

Feeder

A three phase distribution line circuit used as a source to other three phase and single phase circuits.

Federal Energy Regulatory Commission (FERC)

FERC is an independent regulatory agency within the U.S. Department of Energy that approves rates for wholesale electricity transactions and transmission of electricity in interstate commerce for utilities, power marketers, power pools, power exchanges an

Fault Indicator

A device installed on a conductor to determine if current exceeded the indicator’s current rating. Fault indicators sense using use the magnetic field induced by load current.