Why Choose the ABB 1SAX611001R1101 EF370-380 Electronic Overload Relay?
The ABB 1SAX611001R1101 (EF370-380) is a high-performance electronic overload relay designed to provide reliable motor protection against overload and phase failure in demanding industrial applications. As part of the ABB EF electronic overload relay series, it combines a wide adjustable current range with accurate electronic protection and straightforward integration with ABB contactors.
The EF370-380 is a self-supplied electronic overload relay, meaning that no additional external supply is required for its protection electronics. It provides selectable trip classes 10E, 20E and 30E, temperature compensation, trip indication, STOP and test functions, and selectable automatic or manual reset, giving engineers flexibility when configuring motor protection for different starting and operating conditions.
With an adjustable setting range of 115–380 A and a rated operational current of 380 A, the EF370-380 is designed for high-current industrial motors. It can be connected directly to compatible ABB contactors including AF210, AF260, AF265, AF300, AF305 and AF370 models, providing a compact motor starter and protection solution.
Key Advantages
- Advanced electronic overload protection for industrial motors.
- Wide 115–380 A adjustable current range for flexible motor protection.
- Selectable 10E, 20E and 30E trip classes for different motor starting requirements.
- Protects motors against overload and phase failure.
- Self-supplied design eliminates the need for a separate external power supply.
- Selectable automatic or manual reset simplifies integration into different control strategies.
Key Features
- ABB EF370-380 electronic overload relay.
- 115–380 A adjustable setting range.
- 380 A rated operational current.
- Three-pole motor protection.
- Selectable trip classes 10E, 20E and 30E.
- 1 normally closed (NC) trip contact and 1 normally open (NO) signal contact.
- Automatic or manual reset selection.
- Integrated STOP and test functions with trip indication.
- Temperature-compensated electronic protection.
- Trip-free operating mechanism.
- Direct mounting on compatible ABB contactors.
- IP20 housing protection.
Reliable Electronic Protection for Industrial Motors
Electronic overload relays such as the ABB EF370-380 continuously monitor the current supplied to an industrial motor and disconnect the control circuit when an overload or phase failure condition threatens the motor. Electronic measurement provides accurate protection across a wide current range while helping prevent overheating, insulation damage and costly motor failures.
The EF370-380 provides selectable trip classes 10E, 20E and 30E, allowing its response characteristics to be matched to motors with different starting times and load conditions. Integrated temperature compensation, test and STOP functions, trip indication and selectable reset operation make the relay particularly suitable for sophisticated motor starters and automated industrial installations.
Typical Applications
- High-power industrial motor starters.
- Motor control centres and switchgear assemblies.
- Industrial pumps, fans and compressors.
- Conveyor and material handling systems.
- Manufacturing and process machinery.
- Automated production and heavy industrial equipment.
