ABB Baldor-Reliance DC Motors

Permanent magnet, integral horsepower shunt wound and RPM III laminated frame DC motors

NEMA or IEC Frames / 1/8 to 500 HP

ABB Baldor-Reliance DC motors give strong low-speed torque and simple speed control on an SCR drive. The DC part of the ABB Baldor-Reliance NEMA range runs from fractional permanent magnet motors to 500 HP wound field motors, for extruders, conveyors, cranes and hoists, test stands, rolling mills, machine tools and paper machines.

About ABB Baldor-Reliance DC motors

Baldor-Reliance has built DC motors for decades, and many plants still run them. The range covers three designs:

Permanent magnet: 1/8 to 5 HP. Compact round-frame motors in NEMA frames 48 to 1810AT or IEC D63D to D112D, with 90 V or 180 V armatures (180 V only from 2 HP). TENV or TEFC, with washdown (1/4 to 5 HP), explosion proof and integral tachometer versions.
Integral horsepower wound field: 1 to 500 HP. Shunt wound motors in NEMA frames 182 to 5011AT or IEC 112 to 315, with 180, 240 or 500 V armatures and field weakening for operation above base speed. Drip proof, blower ventilated, TEFC and air-over designs.
RPM III laminated frame: 1 to 500 HP. A square laminated frame that needs less mounting space than conventional designs, with improved commutation and heat dissipation. NEMA frames C180ATZ to C440ATZ or IEC 112 to 280, open, enclosed and explosion proof.

DC tachometers and encoders are available for speed feedback. Where a DC motor is due for replacement, an AC variable speed motor such as RPM AC is often considered. For explosion proof DC motors, see the explosion proof motors.

ABB Baldor-Reliance DC motor features and benefits

1/8 to 500 HP. Permanent magnet to 5 HP; shunt wound and RPM III to 500 HP.
NEMA and IEC frames. NEMA 48 to 5011AT; IEC D63D to D112D (permanent magnet) and 112 to 315 (wound field).
Wide armature voltage range. 90 and 180 V (permanent magnet); 180, 240 and 500 V (wound field).
Strong low-speed torque. For constant torque loads such as extruders, conveyors and hoists.
Compact RPM III laminated frame. Torque-dense design with improved commutation and heat dissipation.
Easier brush maintenance. Service-line brushes with wear-indicating reference lines on RPM III.
Speed feedback options. DC tachometers (50 or 100 V per 1000 rpm) and digital encoders.
Thermal protection options. Thermostats, thermistors and RTDs on field or interpole coils.
Class F insulation, 1.0 service factor, 24-month manufacturer’s warranty.

ABB Baldor-Reliance DC motor specifications

Specification	Permanent magnet	Integral HP wound field	RPM III
Power range	1/8-5 HP	1-500 HP	1-500 HP
NEMA frames	48-1810AT	182-5011AT	C180ATZ-C440ATZ
IEC frames	D63D-D112D	112-315	112-280
Armature voltage	90 or 180 V (180 V only from 2 HP)	180 V (100/200 V field); 240 or 500 V (150/300 V field)	180, 240 or 500 V
Field	Permanent magnet	Shunt wound (compound available)	Shunt wound
Base speeds	1150, 1750, 2500, 3500 rpm	300-3500 rpm by rating	See datasheet
Enclosures	TENV, TEFC; washdown; explosion proof	DPFG (1-250 HP), DPBV (1-500 HP), TEFC (1-75 HP), TEAO (5-100 HP)	DPG, DPG-FV, TEFC, TENV, TEAO, TEDC, explosion proof
Insulation	Class F	Class F rise (Class H materials)	Class F
Service factor	1.0	1.0	1.0
Manufacturer's warranty	24 months	24 months	24 months

Downloads

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

ABB Baldor-Reliance DC motor FAQs

What is the difference between permanent magnet and shunt wound DC motors?

A permanent magnet DC motor uses magnets for its field, so it is compact and simple, and suits smaller ratings up to 5 HP. A shunt wound motor uses a separately supplied field winding, which allows larger ratings and speed above base by weakening the field.

What is an RPM III DC motor?

RPM III is Baldor-Reliance’s laminated square-frame DC motor, from 1 to 500 HP. The laminated frame packs more torque into a smaller space than a conventional round-frame motor, with better commutation and heat dissipation.

How do I replace an old Baldor or Reliance DC motor?

Start with the nameplate: catalogue or spec number, horsepower, base speed, armature and field voltage, frame and enclosure. These are usually enough to identify the current ABB Baldor-Reliance equivalent. Our guide to reading a NEMA motor nameplate explains each field.

Which armature voltage do I need?

The armature voltage must match the DC drive output. Permanent magnet motors are wound for 90 V or 180 V; wound field motors for 180, 240 or 500 V with matching field voltages. Check the existing motor’s nameplate and the drive rating.

Are IEC frame DC motors available?

Yes. Permanent magnet motors come in IEC frames D63D to D112D, wound field motors in IEC 112 to 315, and RPM III in IEC 112 to 280.

Should I replace a DC motor with an AC motor?

It depends on the machine. Many DC applications can move to an AC variable speed motor and drive, removing brush and commutator maintenance. Where the existing DC drive and controls are staying, a like-for-like DC motor is usually simpler.

Need a price on an ABB Baldor-Reliance DC motor?

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

Contact

Betech 100pt Ltd
Four Square Buildings, Thomas Street
Heckmondwike, West Yorkshire, WF16 0LS

Telephone: 01924 411921
Email: sales@betech.co.uk
Opening hours: 8:00 to 17:00