ABB 1SAX331001R1102 EF65-56 Electronic Overload Relay

1. Product Overview

The ABB 1SAX331001R1102 EF65-56 Electronic Overload Relay is an intelligent device for low-voltage motor protection, providing overload, phase-loss, and short-circuit protection. The EF65-56 relay uses electronic detection for precise current monitoring and can disconnect faulty circuits in time to ensure the safety of motors and equipment. Its modular design allows combination with ABB contactors, suitable for industrial automation systems, machinery, and production line motor protection.

2. Technical Specifications

• Model: 1SAX331001R1102

• Type: Electronic Overload Relay

• Rated Current Range: 12–56 A (adjustable)

• Rated Operating Voltage: AC 400 V / DC 24–60 V

• Protection Functions: Overload, phase-loss, short-circuit

• Output Contacts: NO/NC relay contacts

• Response Time: Fast response

• Mounting: Can be combined with contactor or DIN rail mount

• Operating Temperature: 0°C to +60°C

• Storage Temperature: -20°C to +70°C

• Protection Rating: IP20

• Indicators: LED status indicators

• Dimensions (W×H×D): ~60 × 90 × 70 mm

• Weight: ~0.35 kg

3. Advantages and Features

• Precise current monitoring: Provides real-time motor monitoring for safe operation.

• Multiple protection functions: Overload, phase-loss, and short-circuit protection prevent motor and equipment damage.

• Adjustable rated current: Flexible setting according to motor specifications.

• LED status indicators: Shows relay operating status and fault information for easy maintenance.

• Modular design: Can be combined with contactors, saving space and simplifying maintenance.

4. Typical Applications

• Industrial motor protection and control

• Conveyor systems, pumps, and fan systems

• Automated production lines and machinery motor control

• HVAC systems and compressor protection

• Factory automation and smart manufacturing systems

5. Installation & Usage Notes

• Ensure the relay setting matches the motor rated current before installation.

• Secure all wiring to prevent loose connections or short circuits.

• Install in a dry, ventilated environment to prevent dust or liquid ingress.

• Regularly check LED status and relay operation to ensure motor safety.

• Avoid overload operation to prolong relay life.

The structure and details of the product： ​

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