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Critical Cooling motors

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ABB’s Baldor-Reliance® Critical Cooling motors reliably increase uptime and decrease maintenance of critical HVAC applications in data centers, hospitals and commercial and industrial buildings Critical Cooling motors are designed for inverter duty with either NEMA Premium® (IE3) or ultra-premium (IE5+) efficiency levels. When used with variable frequency drives, Baldor-Reliance Critical Cooling motors offer the highest level of bearing protection in the industry with a lifetime warranty against bearing failure from shaft currents.
Critical cooling motors


• Hybrid ceramic bearings installed on both ends of the motor
• Five-year motor warranty
• Lifetime warranty on bearing failures caused by shaft currents
• Suitable for inverter use per NEMA MG1 Part
• TEAO and TEFC design
• Highly efficient

• NEMA Premium®/IE3 1-30 Hp (0.75 – 22 kW)

• Ultra-premium/IE5+ 1 – 20 Hp (0.75 – 15kW)

• IP54 protection rating
• Color coded numbered leads for easy identification

Common industries

  • Data centers
  • Hospitals
  • Commercial and industrial buildings
  • Cleanrooms

Common applications

  • Variable speed applications
  • Direct drive equipment
  • Belt-driven equipment
  • HVAC systems
  • Air handling
  • Fan array
  • CRAC (computer room AC)

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