Why Choose the ABB EF45-30 Electronic Overload Relay?
The ABB EF45-30 Electronic Overload Relay (Part Number: 1SAX221001R1101) is a high-performance electronic motor overload protection relay designed to provide accurate protection for three-phase motors against overload, phase failure and overheating. As part of the robust ABB EF45 electronic overload relay series, it delivers reliable motor protection while helping maximise equipment uptime in demanding industrial environments.
Unlike conventional thermal overload relays, the EF45-30 uses advanced electronic sensing technology to provide highly accurate motor protection across a wide operating temperature range. The relay is self-powered, requiring no external control supply, and offers selectable trip classes to accommodate a variety of motor starting characteristics. Direct mounting onto compatible ABB AF contactors enables fast and simple installation.
With an adjustable current setting range of 9.0-30 A, integrated auxiliary contacts and industrial-grade construction, the EF45-30 is ideally suited for protecting larger motors used in pumps, compressors, conveyors, HVAC systems, process equipment and industrial automation applications.
Key Advantages
- Accurate electronic overload protection for three-phase motors.
- Adjustable current range of 9.0-30 A.
- Selectable Trip Class 10E, 20E and 30E.
- Protects against motor overload and phase failure.
- Self-powered design requiring no external control supply.
- Direct mounting onto compatible ABB AF contactors.
Key Features
- ABB EF45 electronic overload relay series.
- Current adjustment: 9.0-30 A.
- Rated operational current: 30 A.
- Selectable Trip Classes 10E / 20E / 30E.
- 1 NO + 1 NC auxiliary contacts.
- Automatic or manual reset selection.
- Integrated STOP, TEST and trip indication.
- Direct contactor mounting with screw terminals.
Reliable Motor Protection for Industrial Applications
Electronic overload relays continuously monitor motor current to detect overload and phase loss conditions before damage occurs. This helps reduce downtime, extend motor service life and improve the reliability of industrial equipment operating in demanding environments.
The ABB EF45 series combines excellent measurement accuracy, temperature compensation and adjustable trip characteristics, making it an ideal solution for OEM machine builders, panel manufacturers and industrial maintenance professionals.
Typical Applications
- Industrial motor starters and control panels.
- Pumps and compressor systems.
- Conveyors and material handling equipment.
- HVAC and ventilation systems.
- Packaging and manufacturing machinery.
- Industrial automation and process control systems.
