TeSys LRF, electronic thermal overload relay, 380…630A, class 10. range: TeSys – product name: TeSys LRF – device short name: LR9F – product or component type: electronic thermal overload relay – relay application: motor protection – product compatibility: LC1F400…LC1F630, LC1F800 – network type: AC – thermal protection adjustment range: 380…630 A.