EATON EMT6 Electronic Motor Protection Relay 24-240 V AC/DC

In a busy bottling plant, a conveyor motor suddenly jams. Within milliseconds, the EATON EMT6 detects the locked rotor and trips, preventing winding damage and costly downtime. This electronic motor protection relay is engineered for three-phase motors, offering comprehensive protection against thermal overload, phase failure, phase unbalance, and locked rotor conditions. Its wide control voltage range of 24-240 V AC/DC makes it suitable for diverse industrial control circuits.

Key specifications

• Control voltage: 24-240 V AC/DC, 50/60 Hz
• Adjustable current monitoring: 0.5 - 63 A via external current transformers
• Protection functions: thermal overload, phase failure, phase unbalance, locked rotor
• Output contacts: 1 NO + 1 NC (changeover)
• Reset modes: manual, automatic, remote
• Mounting: DIN rail or screw mounting
• Degree of protection: IP20 terminals, IP65 front (panel mounted)
• Operating temperature: -25 to +60 °C
• Connection: screw terminals
• LED status indicators
• Standards: IEC/EN 60947-8, UL, CSA

Why choose it

The EMT6 stands out for its versatility and reliability. It accepts a broad supply voltage range, eliminating the need for multiple relay variants. The adjustable current range, combined with external current transformers, allows precise protection for motors from fractional to large horsepower. Its compact design and DIN rail mounting simplify installation in control panels, while the LED indicators provide clear status at a glance. With both manual and automatic reset options, it adapts to different operational requirements, enhancing motor uptime and safety.

Ideal use cases

• Protecting conveyor motors in material handling systems
• Pump motors in water treatment facilities
• Fans and compressors in HVAC systems
• Machine tools and production equipment
• Any three-phase motor application requiring reliable thermal and phase protection

Good to know

The EMT6 requires external current transformers for current sensing; it does not measure current directly. Short-circuit protection must be provided separately (e.g., fuses or motor circuit breakers). The relay is suitable for use in industrial environments with ambient temperatures from -25 to +60 °C. For panel mounting, the front face can achieve IP65 protection, making it suitable for washdown areas. Always ensure proper wiring and follow local electrical codes during installation.