Under-voltage protection relay SEL-710

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SEL-710 Advanced Motor Protection The SEL-710 Motor Protection Relay features the industry’s most accurate motor protection together with settings, mounting, and communication options designed for easy application. The SEL-710 calculates the motor speed from the voltage and current, and the electrical model of the motor. Knowing the speed, it accurately calculates the rotor heat, solving high-inertia starting problem. Accurate heat calculation also minimizes the cooling period required between starts for all motors. The SEL-710 with the AccuTrack™ Thermal Model determines the longest safe starting time (no speed switch needed) and reduces wait time between motor starts up to 33%. Easily set motor protection with motor nameplate data. The small footprint and flexible mounting options allow easy retrofit without cutting or drilling. The user configurable front panel gives users flexibility for custom messages, alarms, and pushbutton actions. The SEL-710’s flexible system of slide-in I/O and communication cards delivers up to eight communication protocols, including Ethernet, Modbus, and DeviceNet. Send information to a remote terminal, central control room, engineering access, and other locations using multiple protocols simultaneously.