ABB EF750 Electronic Overload Relay

ABB EF750 Electronic Overload Relay Supplier, Exporter in India

ABB EF750-800 Electronic Overload Relay for High-Current Motors

ABB EF750 is an electronic overload relay used for protecting large three-phase motors against overload and phase failure. It is mainly used in high-current motor starters, MCC panels, large pumps, compressors, conveyors and heavy industrial machinery.

The EF750 range is centred around the ABB EF750-800, with an adjustable current range of 250 to 800 A. It is designed for use with larger ABB AF contactors and is suitable where the motor current is above the range handled by smaller electronic overload relays such as EF370 and EF460.

EF750-800 is self-powered, so a separate external power supply is not required for the overload protection function. The relay also offers selectable 10E, 20E and 30E trip classes, giving more flexibility for motors with different starting times and load conditions.

For an ABB EF750 electronic overload relay supplier in India, EF750-800 supplier, 1SAX821001R1101 requirement or ABB 250–800 A motor overload relay, buyers can send the motor current, contactor model, quantity and destination country for quotation.

ABB EF750 Model

ABB EF750-800

• ABB Order Code: 1SAX821001R1101
• Adjustable current range: 250–800 A
• Rated operational current: 800 A
• Electronic motor overload protection
• Phase failure protection
• Selectable trip classes: 10E, 20E and 30E
• Manual or automatic reset
• Self-powered operation
• Suitable for ABB AF580 and AF750 contactors

EF750-800 is the main model under the EF750 family. For replacement and spare requirements, it is advisable to mention the full EF750-800 model and ABB order code 1SAX821001R1101.

Technical Specifications

• Product family: ABB EF750
• Model: EF750-800
• ABB order code: 1SAX821001R1101
• Product type: Electronic overload relay
• Adjustable current range: 250–800 A
• Rated operational current: 800 A
• Number of poles: 3
• Main circuit operational voltage: Up to 1000 V AC
• Rated insulation voltage: 1000 V
• Trip classes: 10E, 20E and 30E
• Motor overload protection
• Phase failure sensitivity
• Self-powered operation
• Manual/automatic reset
• TEST function
• STOP function
• Trip indication
• Auxiliary contacts: 1 NC + 1 NO
• Operating temperature: -25°C to +70°C
• Temperature compensation: Yes
• Suitable contactors: ABB AF580 and AF750
• Terminal type: Screw terminals
• Standards: IEC/EN 60947 series

Features

• Wide 250–800 A motor current setting range
• Electronic overload protection for large motors
• Phase failure protection
• Selectable 10E, 20E and 30E trip classes
• Self-powered design
• No separate supply required for overload protection
• Manual or automatic reset selection
• TEST and STOP functions
• Front trip indication
• 1 NC trip contact and 1 NO signalling contact
• Temperature-compensated operation
• Suitable for ABB high-current AF contactors
• Suitable for normal as well as longer motor starting conditions

ABB EF750 with AF580 & AF750 Contactors

ABB EF750-800 is designed for use with larger ABB contactors including:

• ABB AF580
• ABB AF750

These combinations are commonly used for larger motors in MCCs and industrial motor control systems.

The EF750 provides the overload protection while the AF contactor performs the switching of the motor circuit. For a new motor starter requirement, the motor full-load current, operating voltage and contactor model should be considered together.

ABB EF750 Trip Class 10E, 20E & 30E

EF750-800 allows selection of three overload trip classes.

Class 10E is normally selected for motors with standard starting characteristics.

Class 20E and 30E allow a longer starting period and are useful for motors driving loads that take more time to accelerate.

This flexibility is particularly useful in high-current applications such as large conveyors, crushers, compressors and process machinery.

Applications

ABB EF750 electronic overload relays are commonly used in:

• High-current MCC panels
• Large motor starter panels
• Industrial pumping systems
• Large compressors
• Conveyor systems
• Crushers and mills
• Large fans and blowers
• Material handling equipment
• Cement plants
• Steel plants
• Mining installations
• Process plants
• Water and wastewater facilities
• Oil and gas installations
• Power and utility plants
• Heavy manufacturing machinery
• OEM motor control panels
• Direct-on-line motor starters
• Star-delta motor starters
• Industrial motor control systems

ABB EF750 for Large Motor Protection

With a 250–800 A adjustable range, EF750-800 is intended for larger motor applications where a standard low-current overload relay is not suitable.

It can be used in new motor starter assemblies as well as for replacement requirements in existing ABB installations.

For maintenance and replacement enquiries, the exact EF750 model, contactor details and existing current setting are useful when confirming the correct relay.

Choosing the Correct ABB EF750-800 Relay

For an ABB EF750 quotation, buyers should provide:

• Model: EF750-800
• ABB order code: 1SAX821001R1101
• Motor full-load current
• Motor operating voltage
• Existing ABB contactor model
• Required trip class, if specified
• Quantity
• Destination country

For an existing installation, a clear photograph of the relay and contactor nameplates can also help confirm the requirement.

Looking for ABB EF750-800 Electronic Overload Relay?

We supply ABB EF750-800 electronic overload relays for high-current motor starters, MCC panels, pumps, compressors, conveyors, crushers, heavy machinery and industrial replacement requirements.

Enquiries are welcome for ABB EF750-800 250–800 A electronic overload relay, ABB 1SAX821001R1101, EF750 relay for AF580 / AF750 contactors and ABB electronic overload relay export requirements.Send the complete model, motor current, contactor details, quantity and destination country for quotation.