Shaft grounded

Baldor-Reliance shaft grounded motors protect against VFD-induced bearing damage, ensuring longer life and lower maintenance.

Built-In Protection for VFD-Driven Performance

Baldor-Reliance shaft grounded motors are designed to mitigate bearing damage caused by shaft currents commonly generated in variable frequency drive (VFD) applications. These motors feature an integrated shaft grounding device, typically a conductive microfiber ring or carbon brush, mounted directly to the motor frame. This device provides a low-impedance path to safely divert induced shaft voltages away from the bearings, reducing the risk of electrical discharge machining (EDM), fluting, and premature bearing failure.

Technical data

Proper motor grounding is essential to prevent premature bearing failure, avoiding costly maintenance and potential facility downtime. The most common and cost-effective method is a shaft grounding device mounted directly to the motor frame with a grounding brush or ring.

Up to 100Hp

Power range 1 - 100Hp (0.75 - 75 kW) -G, 1 - 50Hp (0.75 - 37 kW) -BG

Insulation Class H

for increased protection on inverter use

Internal Shaft grounding

ring or brush for bearing current mitigation

Warrant 3-year

on NEMA Premium efficient motors

Meets NEMA Premium®

efficiency requirements

Protection IP22 | IP44

for indoor and outdooor use

Explore the key benefits

Shaft grounding devices protect motor bearings from VFD-induced shaft currents to extend motor life and reduce downtime - and offer peace of mind.

Inverter Duty

Suitable for Inverter Duty per NEMA MG1 Part 31.4.4.2

Shaft Grounding*

*Internally mounted shaft grounding ring (-G suffix) or carbon brush (-BG suffix)

Versatile

Cast Iron / Steel band options allows you to choose the best option for the application and environment

Energy Efficient

Baldor-Reliance® motors meet or exceed all efficiency requirements for US, Canada and Mexico regulations.

Extended motor life

Performance enhancing features that make ABB the #1 NEMA motor brand

ABB Ability

Compatible with ABB Ability smart sensor for condition monitoring

Related Documents

How to extend the life of your motor bearings

Around 75% of industrial motors power pumps, fans, and compressors—equipment with significant potential for efficiency gains. Learn proper grounding techniques to extend motor bearing life and improve reliability.

Inverter-Duty® motors with Shaft Grounding Brush

The need for proper motor grounding is extremely important in preventing premature bearing failure which could result in high maintenance costs or worse - facility downtime. While there are several techniques and practices to ground the motor, most common and economical is a shaft grounding device mounted to the frame of the motor

Motors used in data centers

Powering the connected world

Motors are the hidden workhorses that help provide the cooling and power needed by keep data centers running. By selecting the right motor, you can prolong equipment life, increase efficiency and cut electricity consumption.

Related videos

Related motors

SP4 General Purpose - Enclosed motor

Baldor-Reliance®

Baldor-Reliance® SP4 enclosed motors deliver NEMA Super Premium® efficiency, running cooler, longer, and quieter—DOL or inverter duty—now with a 48-month warranty.

SP4 General Purpose - Open motor

Baldor-Reliance®

SP4 General Purpose open motors achieve NEMA Super Premium® efficiency across-the-line, independently of a drive. DOL or inverter duty, runs cooler, longer and quieter – now with a 48-month warranty.

General Purpose - Three phase enclosed motors

ABB NEMA Motors

The Baldor-Reliance extensive line of General Purpose three phase motors are available in totally enclosed cast iron and industrial steel band for harsh applications.

Discover ABB's Innovative Software and Tools

Unlock the power of ABB's cutting-edge software and tools designed to simplify your industrial electric motor journey. Whether you're selecting, configuring, replacing, or upgrading, our intuitive tools are here to guide you every step of the way. With ABB, finding the perfect match for your motor needs has never been easier. Explore now and make the most informed choice for your operations.

Select your motor

Search our comprehensive list of Baldor-Reliance® motors and gain access to detailed product specifications, technical data, and product documentation.

Configure your motor

ABB’s Motor Connector is an online tool that allows experienced users to select, customize and configure motors to exactly match their performance and application needs. 

Replace your motor

Have an existing motor you’d like to convert to ABB? Use this tool to find your ABB motor.

Upgrade your motor

Use ABB's Energy Savings Calculator to estimate your energy savings and CO2 reduction – switch to a more sustainable motor solution today.