Remote Wear Diagnosis (RWD) module can be installed and used only on TeSys Giga advanced version and, it’s available in 2 variants with 1NO or 1NC contact. The control module continuously monitors the contactor operation & opening speed and measures the main power contact wear. When the main contacts reach 85% of its electrical durability, the control module provides signal through RWD (1NO or 1NC) change-over contacts for remote signalling.