Eaton EMT6 230V Electronic Motor Protection Relay, 0.5-630 A, 1NO+1NC 066400

The Eaton EMT6 230V stands apart from conventional thermal overload relays by offering electronic precision with selectable trip classes and comprehensive protection functions. Unlike bimetallic relays, the EMT6 reacts faster and more consistently to phase failures, unbalance, and locked rotor conditions, making it ideal for critical motor-driven applications in industrial automation and building services.

Highlights

• Electronic motor protection relay with wide current range 0.5–630 A via external current transformers
• Selectable overload release classes: 5, 10, 15, 20, 25, 30 for flexible motor starting characteristics
• Protects against overload, phase failure, phase unbalance, locked rotor, and earth fault
• 1 NO + 1 NC auxiliary contacts for control and signalling
• Manual, remote, and automatic reset functions selectable
• LED status indicators for operational, trip, and fault states
• Direct mounting on contactor or DIN rail adapter for easy installation

In daily use

In daily operation, the EMT6 230V continuously monitors motor current via external current transformers, comparing it against the set overload curve. If a fault occurs, the relay trips within the selected class time, protecting the motor from thermal damage. The clear LED indication allows quick diagnosis, and the selectable reset modes enable either manual intervention or automatic restart after cooling. Its compact design and direct mounting capability simplify panel integration, while the screw terminals ensure secure wiring even in vibrating environments.

Full specifications

• Product type: Electronic motor protection relay
• Series: EMT6
• Control supply voltage: 230 V AC
• Current range: 0.5–630 A (with external CTs)
• Overload release classes: 5, 10, 15, 20, 25, 30 (selectable)
• Protection functions: Overload, phase failure, phase unbalance, locked rotor, earth fault
• Auxiliary contacts: 1 NO + 1 NC
• Reset functions: Manual, remote, automatic (selectable)
• Mounting: Direct mounting
• Connection: Screw terminals
• LED indicators: Operational, trip, fault
• Operating temperature: -25 to +60 °C
• Storage temperature: -40 to +80 °C
• Degree of protection: IP20
• Rated impulse withstand voltage (Uimp): 6 kV
• Rated insulation voltage (Ui): 690 V
• Short-circuit protective device (control circuit): Fuse 2 A gG/gN
• Standards: IEC/EN 60947-4-1, UL, CSA

Final note

The Eaton EMT6 230V delivers robust motor protection with electronic accuracy, reducing downtime and extending motor life in demanding industrial environments.