The Shelly 120A current transformers clamp scale thelarge values of current to small, standardized values for measuring purposes.They provide a secondary current that is accurately proportional to the currentflowing in its primary circuit. The current transformer presents a negligibleload to the primary circuit. The length of the CT clamp's cables is 60 cm. *NOT compatible with Shelly Pro EM-50, Shelly Pro 3EM,Shelly EM Gen3 and Shelly Pro 3EM-3CT63
