This is a rectangular sensor for residual current protection for ComPact NS 1600b-3200 devices equipped with the Micrologic 7 A/P trip unit. The sensor is installed around the busbars (phases + neutral) to detect the zero phase current required for residual current protection. The operating current is up to 3200 A. The internal dimensions are 470mm x 160mm x 72mm (WxHxD). The external dimensions are 572mm x 281mm x 72mm (WxHxD). The weight is 18 kg. The sensor is installed in the switchboard. The sensor is equipped with a cable for connection to the ComPact NS circuit breaker.