ABB 1SAX221001R1101 EF45-30 Electronic Overload Relay

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1. Product Overview

The ABB 1SAX221001R1101 EF45-30 Electronic Overload Relay is an intelligent electronic device for motor protection, providing precise current monitoring and overload protection. The EF45-30 relay can be used in combination with ABB contactors to provide short-circuit, overload, and phase-loss protection, ensuring safe operation of motors and equipment. Its modular design allows easy installation and maintenance, suitable for industrial automation and machinery control systems.

2. Technical Specifications

• Model: 1SAX221001R1101

• Type: Electronic Overload Relay

• Rated Current: 0.63–10 A (adjustable)

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

• Response Time: Fast response to overload and short-circuit conditions

• Control Output: Relay contact output NO/NC

• Mounting: Directly 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): ~45 × 80 × 70 mm

• Weight: ~0.15 kg

3. Advantages and Features

• Intelligent protection: Provides overload, phase-loss, and short-circuit protection with precise motor monitoring.

• Adjustable current setting: Rated current can be adjusted according to motor specifications for flexibility.

• LED status indicators: Provides visual feedback of relay status and fault information, facilitating maintenance.

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

• Industrial-grade durability: Reliable operation in vibration, dust, and high-temperature environments.

4. Typical Applications

• Industrial motor and pump protection

• Motor control in automated production lines

• Conveyor and fan system control

• HVAC systems and compressor protection

• Factory automation and machinery motor protection

5. Installation & Usage Notes

• Ensure motor rated current matches relay setting 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.