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ABB ef460-50to0 electronic overload relay 150a – 500a
ABB EF460-500 electronic overload relay with adjustable 150-500 A setting range, selectable trip classes and integrated phase failure protection for industrial motor control applications.
£551.15
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.
Technical Specifications
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| Compatible With | AF400–AF460 | |
|---|---|---|
| Mounting Type | Direct mount on contactor | |
| Current Range | 150–500 A | |
| Trip Class | Adjustable (5–30) | |
| Reset Type | Manual / Automatic | |
| Device Type | Electronic Overload Relay | |
| Current | 500 A | |
| Phase | Three Phase | |
| IP Rating | IP20 | |
| Poles | 3-pole | |
| Series | EF460 | |
| Part number | 1SAX721001R1101 | |
| Product type | Electronic overload relay | |
| Current setting range | 150–500 A | |
| Rated operational current | 500 A | |
| Trip classes | 10E / 20E / 30E selectable | |
| Rated operational voltage | Main circuit 1000 V AC | |
| Auxiliary circuit voltage | 600 V AC/DC | |
| Rated insulation voltage | 1000 V | |
| Rated impulse withstand voltage | Main circuit 8 kV | |
| Number of poles | 3P | |
| Auxiliary contacts | 1 NC + 1 NO | |
| Connection type | Screw terminals | |
| Degree of protection | Housing IP20, terminals IP00 | |
| Mounting type | Direct attachment to contactor | |
| Suitable for | ABB AF400 and AF460 contactors | |
| Frequency | 50 / 60 Hz | |
| Operating temperature | approx. -25 °C to +70 °C | |
| Standards | IEC/EN 60947-4-1, UL 60947-4-1 | |
| Dimensions (W × H × D) | approx. 186 × 103.5 × 152.13 mm | |
| Weight | approx. 1.18 kg |
Frequently Asked Questions
What is the ABB EF460-500 used for?
The EF460-500 protects large three-phase electric motors against overload, phase failure and overheating in industrial motor control systems.
What current range does this overload relay support?
The relay provides an adjustable protection range from 150 A to 500 A.
Does the EF460-500 require an external power supply?
No. The relay is self-powered and operates without an additional external control supply.
Which trip classes are available?
The relay supports selectable Trip Class 10E, 20E and 30E for different motor starting requirements.
Which contactors is this relay compatible with?
The EF460-500 is designed for direct mounting onto compatible ABB AF400 and AF460 contactors.
Trusted by Industrial Control Professionals
ABB EF460 electronic overload relays are trusted worldwide by OEM manufacturers, panel builders and industrial maintenance engineers for delivering accurate motor protection, dependable performance and long service life in demanding industrial environments.
