It is a transformer that uses air as the cooling medium. This term is abbreviated with the ANSI designation AA, indicating open, natural draft ventilated construction.

Aluminum.

A flow of electricity which reaches maximum in one direction, decreases to zero, then reverses itself and reaches maximum in the opposite direction. The cycle is repeated continuously. The number of cycles per second is equal to the frequency.

A mixture of different elements.

The forming of an amalgam; the union of two materials; an alloy.

The noise level of the surrounding area, measured in decibels (dB).

The temperature of the atmosphere of surrounding environment. Typically defined by industry standards as 25° C.

Unit of electrical current flow, or rate of flow of electrons.

American National Standards Institute; Electrical standard developed and published as a result of recommended practices and studies made by NEMA and IEEE.

American National Standards instituted Standard for high-voltage elbow connectors. Last issue date, 1985. Deadfront arrest interfaces are defined in this standard.

Industry standards for fuses, air switches and accessories.

American Nation Standards Institute Standard for metal oxide surge arresters. Last issue date, 1993.

A normal power frequency such as 60hz is applied to each winding for one minute. These tests are in accordance with table (3) in ANSI C57-12-01.

Sparking that results when undesired current flows between two point of differing potential.

An arc extinguishing extension on the end of an ELS current-limiting fuse, an essential part of the EL Bay-O-Net holder\'s loadbreak rating.