Schneider Electric 74RFT-1641-001 Current Transformer

Schneider Electric’s Square D 74RFT-1641-001 current transformer is a rectangular through-window device (RFT) designed for 600 V class switchgear and instrumentation. It provides a 1640:1 current ratio and a 60 Hz operating specification, with a Basic Insulation Level (BIL) of 10 kV to withstand impulse events. The transformer features a compact 4 1/2 in. by 4 1/2 in. window, allowing a passing conductor to be enclosed for measurement or relay interfacing without removing the conductor from service. As part of Schneider Electric’s instrument-transformer family, the 74RFT-1641-001 delivers an isolated secondary output suitable for metering or protection-relay inputs while keeping primary currents separated from measurement circuitry. The model name identifies a precise rectangular-toroidal configuration within the 74RFT line, offering a reliable solution for high-current monitoring scenarios where a high primary-to-secondary ratio and robust insulation are required.