... .Professional manufacturer 3.OEM,ODM services LR2 Thermal overload relay This series of Thermal overload relay,overload relay,thermal relay,relay can be used in the circuit of ... for protecting the phase break when the electric motor is overload.A. Fundamental parameter of the main circuit:(a). Rated insulation ... voltage 500V(c). Rated frequency 50-60HZ. LR2 Schneider Thermal Overload Relay