Why Choose the ABB EF45-45 Electronic Overload Relay?
The ABB EF45-45 Electronic Overload Relay (Part Number: 1SAX221001R1102) is a high-performance electronic motor overload protection relay engineered to provide accurate protection for three-phase motors against overload, phase failure and overheating. As part of the trusted ABB EF45 electronic overload relay series, it delivers dependable motor protection while helping maximise equipment reliability and minimise downtime in demanding industrial applications.
Unlike conventional thermal overload relays, the EF45-45 uses advanced electronic sensing technology to deliver precise protection across a wide operating temperature range. The relay is self-powered, requiring no external control supply, and features selectable trip classes to accommodate a variety of motor starting applications. Its direct mounting design enables fast installation onto compatible ABB AF contactors.
With an adjustable current setting range of 15-45 A, integrated auxiliary contacts and robust industrial construction, the EF45-45 is ideally suited for protecting larger motors used in pumps, compressors, conveyors, HVAC equipment, manufacturing machinery and industrial automation systems.
Key Advantages
- Accurate electronic overload protection for three-phase motors.
- Adjustable current range of 15-45 A for flexible motor protection.
- 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: 15-45 A.
- Rated operational current: 45 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 and rapidly detect overload or phase loss conditions before damage occurs. This helps reduce downtime, extend motor service life and improve the reliability of industrial machinery operating in demanding environments.
The ABB EF45 series combines high measurement accuracy, temperature compensation and selectable 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.
