device inserted in flooded evaporator tubes to prevent the evaporator from becoming oil-bound or the refrigerant liquid from becom-ing quiescent at a pressure lower than its boiling point.

1. device that, on proper variable sensing, initiates control signals or actions to conserve energy. Note: The economizer decision should be made at a fixed outside air temperature, or by comparing return and outside air tempera-tures, or by comparing the return and outside air total heat (enthalpy).

2. control system that reduces the mechanical heating and cooling requirement. Usually refers to use of outside air, but with logic to maintain a fixed minimum of outside air and to take only the minimum amount of outside air when the total heat of the return air exceeds the total heat of the outside air.

electric current induced in the body of a conductor when that conductor either moves through a non-uniform magnetic field or is in a region where there is a change in magnetic flux.

nondestructive test in which the change of impedance of a test coil brought close to a conducting speci-men indicates the eddy currents induced by the coil, thereby indicat-ing certain properties or defects of the specimen; for example, thickness.

movement or flow of charge in an electrical circuit, measured in amperes 

interruption of any one conductor in a three-phase system