An iron-core transformer for use with audio-frequency currents to transfer signals from one circuit to another. Used for impedance matching to permit maximum transfer of power.

1. A transformer with a single winding (electrically) in which the whole winding acts as the primary winding, and only part of the winding acts as the secondary (step-down); or part of the winding acts as the secondary (step-up).

A transformer with mounting holes on either the brackets or frame so it can be attached directly to the assembly, as shown below. Chassis-mount transformers may be large or small.

Also called an impedance coil. An inductor (reactor) used to limit or suppress the flow of alternating current without an appreciable effect on the flow of direct current.

1. The magnetic material placed within a coil to intensify the magnetic field.

That length of time that an insulation material withstands the action of a specified level of field-intensified ionization that does not result in the immediate, complete breakdown of the insulation. Also called ionization resistance, brush discharge resistance, or slot-discharge resistance.

A shield placed around a high potential point to redistribute electrostatic lines of force and prevent corona.

The movement of electrons through a conductor. Current is measured in amperes.

A transformer, intended for measuring purposes, designed to have its primary winding connected in series with a circuit carrying the current to be measured or controlled.

The voltage between two electrodes at which electric breakdown of the specimen occurs under prescribed test conditions. Also called electric breakdown voltage, breakdown voltage, or hi-pot.