ABB EF45-45 Electronic Overload Relay

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1. Product Overview

The ABB EF45-45 Electronic Overload Relay is designed for low-voltage motor protection. It monitors motor current and provides protection against overload, phase loss, and short-term overload conditions. The EF45-45 can be combined with ABB contactors, offering reliable motor protection and fault diagnostics, with digital settings and status indication for easy integration into industrial automation systems.

2. Technical Specifications

3. Key Features and Benefits

• High-precision electronic current monitoring

• Multi-function protection: overload, phase loss, short-time overload

• Flexible installation: combined with contactor or DIN rail

• Digital settings with LED status display

• Industrial-grade reliability and robustness

• Energy-efficient and easy maintenance

4. Typical Applications

• Motor protection and control systems

• Industrial automation lines

• Pumps, fans, compressors, and other rotating equipment

• Motor Control Centers (MCC)

• Metallurgy, chemical, mining, petrochemical, and paper industries

• HVAC systems and building automation

5. Installation & Usage Notes

• Set the relay current according to motor rated current

• Disconnect power before installation or commissioning

• Ensure terminals are securely tightened

• Install away from strong electromagnetic interference

• Regularly check LED status and reset or replace if needed

The structure and details of the product：

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