ABB Baldor-Reliance Severe Duty Motors

Cast iron Super-E® NEMA Premium® motors for dirty, wet, corrosive and high-vibration plant, including IEEE 841 designs

Up to NEMA 5000 Frame / 900 HP / 2, 4, 6, 8 Pole

ABB Baldor-Reliance severe duty motors are three phase, cast iron motors in the ABB Baldor-Reliance NEMA range, built to protect critical processes from contamination, moisture, vibration and corrosion. They suit chemical and petrochemical plant, oil and gas, pulp and paper, mining and aggregates, metals and water treatment.

About ABB Baldor-Reliance severe duty motors

A severe duty motor goes further than a general purpose motor. ABB Baldor-Reliance severe duty motors have cast iron frames, endplates and conduit boxes, a two-part epoxy paint system and shaft slingers at both ends. Most use Super-E® NEMA Premium® electrical designs, with high starting and peak torque and a wide speed range.

The range splits into lines for different duties:

XT: 1 to 300 HP. The entry severe duty motor, in NEMA frames 143T to 449T, IP54, Division 2 certified.
XEX: 1 to 900 HP. The heavier-duty line, in frames 143T to 5000, IP55 (IP66 on 5000 frames), with regreasable bearings, an oversized conduit box and stainless steel nameplates. Division 2 certified.
841XL and 661XL: IEEE 841. For petroleum and chemical plants, IP56, meeting IEEE 841 and IEEE 45, Division 2 certified, with a 5-year warranty.
Dirty Duty Plus, Quarry Duty and Crusher Duty. For extreme contamination (Dirty Duty Plus, IP56, 2,000-hour salt fog paint) and high-torque crushing duty (NEMA Design C Quarry Duty and Design A Crusher Duty).
SP4 Severe Duty: 25 to 300 HP. Severe duty construction with SP4 Super Premium

Division 2 certification covers areas where a flammable atmosphere is present only under abnormal conditions. For Division 1 or ATEX zones, an explosion proof motor is needed.

ABB Baldor-Reliance explosion proof motor features and benefits

1 to 900 HP in NEMA frames 143T to 5000. 2, 4, 6 and 8 pole across the XT and XEX lines.
Cast iron construction. Cast iron frame, endplates and conduit box resist contamination, moisture, vibration and corrosion.
Two-part epoxy paint system. Above 300 hours’ salt fog resistance to ASTM B117, with epoxy-coated rotor and stator; Dirty Duty Plus is rated above 2,000 hours.
Super-E® NEMA Premium® efficiency. Meets or exceeds US, Canadian and Mexican efficiency requirements; NEMA Super Premium® available in SP4 Severe Duty.
Sealed against dust and water. IP54 to IP56 depending on line, with neoprene V-ring slingers on both ends (XT and XEX).
Division 2 certified. XT, XEX, 841XL and 661XL lines.
IEEE 841 designs. 841XL and 661XL meet IEEE 841 and IEEE 45.
Suitable for inverter use. To NEMA MG1 Part 31.4.4.2, for use with a variable speed drive.
Class F insulation, Class B rise, 1.15 service factor. Thermal headroom for demanding duty cycles.
3- or 5-year manufacturer’s warranty. 3 years on most lines; 5 years on IEEE 841 motors.

ABB Baldor-Reliance severe duty motor specifications

Common specifications

Specification	Detail
Standard	NEMA MG1
Power range	1-900 HP (XT 1-300 HP; XEX 1-900 HP; SP4 Severe Duty 25-300 HP)
NEMA frame sizes	143T-5000 (Dirty Duty Plus from 56; Crusher Duty 180T-588)
Poles / speed (60 Hz)	2, 4, 6, 8 pole (3600, 1800, 1200, 900 rpm)
Voltage (60 Hz)	208-230/460 V, 230/460 V, 460 V, 575 V (by line)
Efficiency	Super-E® NEMA Premium®; NEMA Super Premium® (SP4 Severe Duty)
Construction	Cast iron frame, endplates and conduit box; two-part epoxy paint (300+ hours salt fog, ASTM B117)
Insulation	Class F, Class B rise at 1.0 SF
Service factor	1.15 continuous (Crusher Duty 1.25 up to 100 HP)
Inverter duty	NEMA MG1 Part 31.4.4.2

Severe duty lines

Line	Frames	IP	Division 2	Warranty	Notes
XT	143T-449T	IP54	Yes	3 years	1-300 HP
XEX	143T-5000	IP55 (IP66 on 5000)	Yes	3 years	1-900 HP; regreasable bearings; NEMA Design B
841XL	143T-449T	IP56	Yes	5 years	Meets IEEE 841 and IEEE 45
661XL	182T-365T	IP56	Yes	5 years	Meets IEEE 841 and IEEE 45
Dirty Duty Plus	56-256T	IP56	No	3 years	IEEE 45; 2,000-hour salt fog paint
Quarry Duty	145T-215T	IP55	No	3 years	NEMA Design C high torque
Crusher Duty	180T-588	IP55 (IP66 on 5000/586-588)	No	3 years	NEMA Design A high torque
SP4 Severe Duty	See datasheet	IP55	Yes	4 years	25-300 HP; NEMA Super Premium®

Downloads

For technical information, brochures and further product details, visit our downloads page.

ABB Baldor-Reliance explosion proof motor FAQs

What is a severe duty motor?

A severe duty motor is a totally enclosed motor built for harsher conditions than a general purpose motor. It typically has a cast iron frame and endplates, better sealing, corrosion-resistant paint and a stronger shaft, so it can run continuously in dirty, wet or corrosive plant.

What is the difference between XT and XEX severe duty motors?

XT is the entry line: 1 to 300 HP in frames 143T to 449T, IP54. XEX is the heavier-duty line: 1 to 900 HP in frames up to 5000, IP55, with regreasable bearings on all frames, an oversized conduit box and stainless steel nameplates. Both are cast iron, Division 2 certified and carry a 3-year warranty.

What is an IEEE 841 motor?

IEEE 841 is the petroleum and chemical industry standard for severe duty totally enclosed motors. It sets tighter limits on vibration, sealing, temperature rise and bearing life. The ABB Baldor-Reliance 841XL and 661XL meet IEEE 841 and IEEE 45, are rated IP56 and carry a 5-year warranty.

Can a severe duty motor be used in a hazardous area?

The XT, XEX, 841XL and 661XL lines are certified for Division 2 under the North American Class and Division system. For Division 1 locations, or where ATEX equipment is required on a UK site, use an explosion proof motor.

Which severe duty motor suits crushers and quarry equipment?

Quarry Duty motors (145T to 215T) have NEMA Design C high starting torque. Crusher Duty motors (180T to 588) have NEMA Design A torque characteristics that exceed Design C, with a 1.25 service factor up to 100 HP.

What is the difference between ABB and ABB Baldor-Reliance severe duty motors?

Both are ABB NEMA motors. The ABB Baldor-Reliance lines (XT, XEX, 841XL and others) come from Baldor Electric Company, acquired by ABB in 2011. The ABB-branded SD100 and SD200 come from the NEMA motor business ABB acquired in 2023. See ABB NEMA severe duty motors for that range.

Will a severe duty motor run on a UK 50 Hz supply?

These are 60 Hz designs. Some ratings carry 50 Hz data on the nameplate, but speed, output and voltage at 50 Hz differ from the 60 Hz rating, so check the datasheet for the specific motor and supply.

Need a price on an ABB Baldor-Reliance severe duty motor?

Send us the catalogue number from the motor nameplate, or the horsepower, speed, frame, voltage and duty, for a quote. Call 01924 411921 or email sales@betech.co.uk.