Schneider Electric 170R-801 Current Transformer

Schneider Electric's Square D 170R-801 Current Transformer is a toroidal current sensor with an 800:5 primary-to-secondary ratio, designed to convert high conductor currents into a precise 5 A signal by threading the conductor through its 4-1/4 in. inside diameter, enabling accurate metering and relay input in compact switchgear. Engineered for use in 600 V systems with a 10 kV BIL, it supports a frequency range of 25–400 Hz, making it suitable for both utility-grade power and industrial controls where reliability and insulation margins matter. The device carries ANSI metering accuracy class 0.3 at 60 Hz and a relay class of C10, ensuring dependable measurement for energy meters and protective relays; it features epoxy-resin encapsulated construction to withstand routine panel and enclosure environments. Weighing approximately 4.1 lb (1.9 kg), the 170R-801 is part of Square D's broader family of current transformers designed for easy integration with standard instrument transformers, meters, and protection relays in modern electrical distributions.