Schneider Electric TeSys LRD thermal overload relay, model LRD3355, is a 3-pole differential thermal overload relay designed for direct connection to TeSys LC1D80 and LC1D95 contactors. It is rated for 30 to 40 A with a class 10A rating, providing motor protection for 3‑phase loads. The LRD3355 features a 1NO/1NC contact arrangement and includes phase-loss sensitivity, aligning with common motor-control protection schemes. As part of the TeSys LRD family, this relay serves as a differential thermal overload device to interrupt motor current when overload or fault conditions occur.
