Shelly 120 A Transformer Clamp Overview is a current collector clamp for the Shelly EM. It is required to read out the power consumption data with the Shelly EM. This is an accessory item and does not include the Shelly EM. Scope of delivery1 x 120 A transformer terminal 1 x user manual Specifications CURRENT TRANSFORMER 50A Accuracy 1% Core Ferrite core Electrical Strength 3000VAC 1mA60s Internal diameter 11mm Load Resistance 20O Rated Primary Current 50A Rated Secondary Current 16.67mA Saturation current =85A Size 23.5mm x 41.5mm x 26mm CURRENT TRANSFORMER 120A Accuracy 1% Core Ferrite core Electrical Strength 3000VAC 1mA60s Internal diameter 17mm Load Resistance 20O Rated Primary Current 120A Rated Secondary Current 40mA Saturation current =120A Size 31mm x 45mm x 30mm FEATURES Compatible 50A Shelly EM Compatible Shelly EM, Shelly 3EM