Why Choose the ABB EF460-500 Electronic Overload Relay?
The ABB EF460-500 Electronic Overload Relay (Part Number: 1SAX721001R1101) is a heavy-duty electronic motor overload protection relay designed to provide accurate protection for large three-phase motors against overload, phase failure and overheating. As part of the advanced ABB EF460 electronic overload relay series, it delivers reliable motor protection for demanding industrial applications while helping maximise equipment uptime and minimise maintenance costs.
Using advanced electronic sensing technology, the EF460-500 delivers highly accurate motor protection across a wide operating temperature range. The relay is self-powered, requiring no external control supply, and offers selectable Trip Class 10E, 20E and 30E to suit a wide variety of motor starting characteristics. Direct mounting onto compatible ABB AF contactors enables straightforward installation and commissioning.
With an adjustable current setting range of 150-500 A, integrated auxiliary contacts and rugged industrial construction, the EF460-500 is ideally suited for protecting high-power motors used in pumps, compressors, conveyors, crushers, fans and heavy industrial automation systems.
Key Advantages
- Accurate electronic overload protection for large three-phase motors.
- Adjustable current range of 150-500 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 EF460 electronic overload relay series.
- Current adjustment: 150-500 A.
- Rated operational current: 500 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 Heavy Industrial Applications
Electronic overload relays continuously monitor motor current and rapidly detect overload or phase loss conditions before damage occurs. This helps reduce costly downtime, extend motor service life and improve the reliability of high-power industrial equipment.
The ABB EF460 series combines excellent measurement accuracy, temperature compensation and adjustable trip characteristics, making it an ideal solution for OEM machine builders, industrial panel builders and maintenance professionals responsible for large motor installations.
Typical Applications
- Large industrial pumps and compressors.
- Heavy-duty conveyor systems.
- Mining and quarry equipment.
- Industrial fans and HVAC installations.
- Process manufacturing machinery.
- Motor control centres and industrial automation systems.
