CR Magnetics CR4395-EL-120-110-X-CD-ELR-I Current Sensing Relay with Internal Transformer, 120 VAC, Energized on Low Trip, 1 - 10 AAC Trip Range Current sensing relay for monitoring electrical current Current carrying wire is routed through an aperture Electrical isolation between circuits (SPDT) Variable trip point range with adjustable timer for stability UL recognized for safety and RoHS compliant for hazardous substances