The Shelly Induction Clamp CT 400A transformer is compatible with DIN rails (Hutschiene) and designed to measure alternating current up to 400 A. It is a passive inductive clamp (split-core CT) that attaches around a single conductor and provides a transformer output compatible with energy meters such as the Shelly Pro 3EM.

The CT is intended as an accessory for DIN rail installations, providing safe and non-intrusive current measurement. It requires a compatible meter/input configured for external CTs, as it does not provide a digital output on its own. Precise mechanical dimensions have not been specified in the provided data.