Electricity

Electricity

A database referring to the existence of a flow of electric charge.

Industry: Utilities

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Electricity

oil-air (OA)

Electrical equipment; Electricity

Oil-Air, a cooling classification for transformers now classified as ONAN. Oil type, Natural convection flow through cooling equipment and in windings, & Air external cooling medium.

occasional traffic

Electrical equipment; Electricity

Refers to a grade level Reinforced Polymer Concrete or Fiberglass Reinforced Plastic Box or Cover load rating of 20,800lbs. This rating is derived from double wheel loading of 16,000 lbs with an ...

off peak power

Electrical equipment; Electricity

Power supplied during designated periods of low power system demand.

off-load tap changer

Electrical equipment; Electricity

A tap changer that is not designed for operation while the transformer is supplying load.

ohm

Electrical equipment; Electricity

A unit of electrical resistance defined as the resistance of a circuit with a voltage of one volt and a current flow of one ampere.

ohm's law

Electrical equipment; Electricity

E=IR; I=E/R; R=E/I; Where E = Voltage impressed on a circuit, I = current flowing in a circuit and R = circuit resistance. Ohm's Law is used for calculating voltage drop, fault current and other ...

oil breakers

Electrical equipment; Electricity

A type of high voltage circuit breaker using mineral oil as both an insulator and an interrupting medium. Typically, these units were produced for use at voltages from 35 kV to as much as 345 kV. ...