Could a Severe Duty NEMA Motor Improve Your Operations?

Could a Severe Duty NEMA Motor Improve Your Operations?

When you’re working in a highly dirty, contaminated, or hazardous environment, it may be worth the money to invest in a specialized, severe duty NEMA motor—that is designed to handle those challenging conditions.  And if you are working in a dirty environment that is also highly combustible, a NEMA motor that is also explosion proof brings extra peace of mind.

Benefits of Using a Severe Duty NEMA MotorNEMA motor

By using a severe duty NEMA motor that can stand up to harsh environmental factors, you will:

  • Extend the life of your motor
  • Reduce maintenance time
  • Keep your production line running smoother
  • Reduce downtime for repairs
  • Minimize risk of fire or explosion

“It’s absolutely worth the investment to use a motor that can handle these tough conditions,” said Scott Miklavcich, a Motors specialist at Siemens USA.  “It will easily pay off in the long run.”

Features of Severe Duty Motors

Miklavcich added that Siemens’ NEMA motors are designed with several key features that perform well in corrosive environments, such as:

  • Cast iron construction
  • Roller bearings on drive end (optional)
  • Copper rotors up to 256T frame for select products—with 5-7%  efficiency increase above NEMA premium standards (optional)
  • Zinc-plated hardware
  • Re-greasable bearings with automatic grease relief fittings standard on IEEE841 products
  • Ingress protection—IP54 (SD100), IP55 (SD100 IEEE841), IP65 (XP100)

2 Situations—Where You Need a Severe Duty Motor

Here are 2 situations where your operations might benefit from using a severe duty or explosion proof motor:

If you’re working in a highly combustible environment.

The NEMA explosion proof drives—such as the XP100—are perfect for highly combustible environments with lots of dust in the air, like grain conveyors or liquefied natural gas operations.  It not only operates smoother, but also minimizes the risk of explosion or fire.  “This is a fairly new design, and not a lot of brands offer the range of inverter duty ratings that Siemens does,” Miklavcich said.

If you’re working in a dirty or contaminated space.

In very “dirty” operations—such as pulp, paper, petrochemicals, or mining—then the Siemens Severe Duty NEMA is a good fit.  Better shaft seals keep out contamination, and the cast iron construction prevents corrosion.

Recent Product Enhancements

Recent product enhancements help extend the life of Siemens’ NEMA severe duty motors—and improve overall lifetime ease of maintenance even more, including:

  • Div. 2 labeling on the stainless steel nameplate
  • Improved labeling with more data
  • Bi-directional non-sparking fan
  • Inverter-duty rated for variable torque (VT) and constant torque (CT) applications

About Siemens

Siemens USA is a U.S. subsidiary of Siemens AG.  For more than 165 years, Siemens has built a reputation for innovation and product quality.  Siemens employs 60,000 people in all 50 states and Puerto Rico, with an annual revenue in the U.S. of $22 billion.

Looking for a Siemens NEMA motor?

Contact Jim Wright, Electrical Product Manager at IBT Industrial Solutions, at (913) 261-2121, or



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