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ABB ef750-800 electronic overload relay 250a - 800a
MPN: 1SAX821001R1101
Alt. SKU: EF750-800
Special Price
£881.64
£734.70
Regular Price
£1,356.36
Why Choose the EF750-800 [1SAX821001R1101]
The EF750-800 is a self-powered electronic overload relay requiring no external supply, providing dependable and rapid motor protection against overload and phase failure. Designed for straightforward installation and operation, it is fully compatible with standard motor applications and offers a broad current setting range with high accuracy. The relay supports selectable trip classes (10E, 20E, 30E) to match specific motor protection requirements and operates reliably across a wide temperature range. Key features include temperature compensation, normally closed trip contact, normally open signal contact, selectable automatic or manual reset, trip-free mechanism, STOP and Test functions, and clear trip indication. The EF750-800 is certified to ATEX (from week 42, 2014) and IECEx (from week 15, 2017) standards, ensuring suitability for hazardous environments.
Technical Specification
- Function: Self-supplied electronic overload relay for motor protection against overload and phase failure.
- Current Rating: Setting range 250 to 800 A, rated operational current 800 A.
- Voltage Rating: Auxiliary circuit 600 V AC/DC, main circuit 1000 V AC.
- Contact Configuration: 1 normally closed (NC) trip contact, 1 normally open (NO) signal contact.
- Insulation and Impulse Ratings: Rated insulation voltage 1000 V; rated impulse withstand voltage 6 kV (auxiliary), 8 kV (main).
- Degree of Protection: Housing IP20; main circuit terminals IP00.
- Terminal Type and Size: Flexible and rigid cables; 0.75 to 4 mm² with ferrules for auxiliary circuit.
- Tightening Torque: Auxiliary circuit 0.8 to 1.2 N·m.
- Mounting Position: Suitable for positions 1 to 6.
- Standards and Certification: Complies with IEC/EN 60947 series and UL 60947; ATEX and IECEx certified.
Trusted By Customers Worldwide
"Specified by UK panel builders for dependable control." Controls Engineer, UK
Frequently Asked Questions
What is the function of the EF750-800 overload relay?
The EF750-800 is a self-supplied electronic overload relay designed to protect motors against overload and phase failure.
What is the current rating range for the EF750-800?
The current rating setting range is from 250 to 800 A, with a rated operational current of 800 A.
What types of contacts does the EF750-800 have?
The relay features one normally closed (NC) trip contact and one normally open (NO) signal contact.
What is the degree of protection for the EF750-800?
The housing has an IP20 rating, while the main circuit terminals are rated IP00.
What is the suitable cable size for the auxiliary circuit?
The relay accommodates flexible and rigid cables from 0.75 to 4 mm² with ferrules for the auxiliary circuit.
Can the EF750-800 be mounted in different positions?
Yes, it is suitable for mounting positions 1 to 6.
What certifications does the EF750-800 have?
The EF750-800 is ATEX and IECEx certified, along with compliance to IEC/EN 60947 series and UL 60947 standards. See the manufacturer's data sheet for standards and approvals.
| Manufacturer Part Number | 1SAX821001R1101 |
|---|---|
| Amp Range | 250A - 800A |
| HS Code | 85364900 |
| Country of Manufacture | China |
| Manufacturer | ABB |
| Alternative Product SKU | EF750-800 |
| Barcode | 4013614487422 |
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