Why Choose the ABB EF65-70 Electronic Overload Relay?
The ABB EF65-70 Electronic Overload Relay (Part Number: 1SAX331001R1101) is a robust electronic motor overload protection relay engineered to provide accurate protection for three-phase motors against overload, phase failure and overheating. As part of the advanced ABB EF65 electronic overload relay series, it combines high accuracy, flexible adjustment and dependable performance for demanding industrial motor control applications.
Unlike conventional thermal overload relays, the EF65-70 uses advanced electronic sensing technology to provide precise motor protection over a wide operating temperature range. The relay is self-powered, eliminating the need for an external control supply, while selectable trip classes allow it to be matched to different motor starting characteristics. It mounts directly onto compatible ABB AF contactors for quick and straightforward installation.
With an adjustable current setting range of 25-70 A, integrated auxiliary contacts and rugged industrial construction, the EF65-70 is ideally suited for protecting larger motors used in conveyors, pumps, compressors, HVAC systems, manufacturing machinery and industrial automation equipment.
Key Advantages
- Accurate electronic overload protection for three-phase motors.
- Adjustable current range of 25-70 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 EF65 electronic overload relay series.
- Current adjustment: 25-70 A.
- Rated operational current: 70 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 EF65 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.
