Schneider LRD3357 TeSys Deca Thermal Overload Relay - 37-50 ATeSys LRD thermal overload relay, 50A 1000V, thermal setting range 37 50A, tripping class 10A, for protection of 3 phase motors 22kW@400V. Differential device with phase failure and load unbalance detection. It provides a thermal adjustment dial, a manual automatic reset selector acting also as a reset button, a trip test button for simulation of tripping, a stop button, a flag indicator, and 2 auxiliary contacts 1NO+1NC for fault signaling. Settings