ABB E800DU Electronic Overload Relay

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1. Product Overview

The ABB E800DU Electronic Overload Relay is a key device for AC motor protection, providing precise overload, underload, and locked-rotor protection. It works with AC contactors and electronically monitors motor current to quickly respond to overload conditions, preventing motor damage and extending equipment life.

The relay features microprocessor-based control, high precision, fast response, and self-diagnostics. It supports remote monitoring and signal outputs, and complies with IEC 60947-4-1 and EN 60947-4-1 international standards.

2. Technical Specifications

3. Key Features & Advantages

• High-precision protection: Electronic current monitoring for fast, accurate overload protection

• Multi-function protection: Supports overload, locked-rotor, underload, and phase-failure protection

• Modular design: Can be combined with ABB contactors for easy installation and maintenance

• Clear status indication: LED or signal output displays operation and fault status

• Communication capability: Optional interface for remote monitoring and automation integration

• Long service life: No mechanical contact wear, high reliability for long-term industrial operation

4. Typical Applications

• AC motor protection in industrial settings

• Motor control and protection in production lines

• Pumps, fans, compressors, conveyors, and processing machinery

• Automated factories and machinery manufacturing

• HVAC systems and building automation motor control

• Chemical, pharmaceutical, food processing, mining, and metallurgical industries

5. Installation & Safety Notes

1. Ensure supply voltage and rated current match the relay specifications.

2. Set overload protection range according to motor rated current and load characteristics.

3. Install on DIN rail or in combination with a contactor as required.

4. Avoid high temperature, high humidity, dust, or corrosive environments.

5. Regularly inspect relay status and signal outputs to ensure protection reliability.

6. Configure delay and protection parameters according to motor and process requirements.

7. Keep relay housing clean to prevent dust or debris from affecting performance.

The structure and details of the product：

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