Eddy Current Loss - The current that is generated in the core due to the voltage that is induced in each lamination by the alternating magnetic flux. The eddy current is proportional to the square of the thickness of the lamination and to the square of the frequency.
EH Fuse Link - Cooper Power Systems' fuse link designed for use on a 38kV distribution system. The EH fuse link exhibits the same time current characteristics as the H Link.
EK Fuse Link - Cooper Power Systems' fuse link designed for use on a 38kV distribution system. The EK fuse link exhibits the same time current characteristics as the K Link.
EL - Energy Limiting; Cooper Power Systems' distribution class, direct-connected arrester for crossarm or polemounting applications.
EL Bay-O-Net Assembly - Cooper Power Systems' under-oil current-limiting fuse cutout; a device whose mechanics represent a stab-sheath arrangement which hold a current-limiting fuse; a device that provides a simple means of replacing an internal under-oil current limiting fuse in the field.
Elbow - An insulated and shielded device for connecting high-voltage cables to apparatus.
Electric Fuse - (See Fuse, Electric.)
Electricity - The flow of electrons.
ELG - Energy Limiting General purpose current-limiting fuse; Cooper Power Systems' full range, air-insulated, clip-mounted, power fuse. Typically used for industrial high amperage rated applications in livefront switchgear.
ELS - Energy Limiting Submersible current-limiting fuse; Cooper Power Systems' full range, under-oil, EL Bay-O-Net mounted fuse (refer to EL Bay-O-Net Assembly).
ELSG - Energy Limiting Submersible General Purpose current-limiting fuse; Cooper Power Systems' full range, under-oil, wet well mounted power fuse. Typically used for high amperage rated applications in oil-filled deadfront switchgear.
ELSP - Energy Limiting Submersible Partial range back-up current-limiting fuse; Cooper Power Systems' back-up, under-oil, current-limiting fuse used in series with a low current clearing device, i.e. Bay-O-Net fuse, cartridge fuse, fuse link or MagneX Interrupter.
ELST - Energy Limiting Submersible Tandem assembly current-limiting fuse; CPS's two-part (tandem) full range current-limiting power fuse. The tandem assembly consists of a high current clearing current-limiting fuse section in series with a separate low current clearing expulsion section.
ELX - Energy Limiting non-expulsion current-limiting fuse; CPS's full range, air-insulated, clip- or drywell-mounted current-limiting fuse. The ELX fuse is C-rated in accordance with ANSI/IEEE C37.47-1981.
EPDM - Ethylene Propylene Dione Monimer; an insulation material used in high voltage equipment
Equivalent FOW Protection Level - Equivalent Front-Of-Wave protection level; the protection level derived specifically for gapless MOV arresters based on a current surge that results in a voltage that crests in 0.5 microseconds.
ET - CPS's fuse link designed for use on a 38kV distribution system. The ET fuse link exhibits the same time current characteristics as the T link.
Eutectic - An alloy with a melting point lower than that of any other combination of the same components; an alloy used as a fuse element to detect and protect against high damaging environmental temperatures' a fuse element used to monitor long overload conditions on a transformer by melting when a combined temperature (top oil temperature rise due to loading plus temperature rise due to current passing through element proper) equal to the fuse's melting temperature is achieved.
Eventful Failure - Any electrical failure that would result in: extensive apparatus damage and need for repair; the spilling of hot and/or environmentally damaging fluids; that which could result in loss of a human life; catastrophic failure; violent failure; any electrical failure that is accomplished by a visible demonstration and my include tank rupture, damage bushings or loosened cover.