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Brushless motors

Empire Magnetics

  • Brushless motor / for hazardous areas

Article: 00014629

Brushless motor / for hazardous areas

Empire Magnetics' PT Series Brushless Servo Motors are sealed and equipped with air fittings for pressurization. With an optional temperature sensor, PT motors can be easily designed into a system that meets NFPA requirements for Class I, Class II and Class III hazardous locations. In a typical installation - such as spray painting, printing, flour mills, fuel processing, alcohol production, chemical processing or rocket fuel machining - the motor is remotely located in a hazardous area. Air lines, and power and temperature sensor cables, run to the control station in a non-hazardous area. Protective conduit shields cabling from mechanical damage. At the control station, a temperature indicator with a setpoint alarm displays motor temperature. The setpoint alarm output will cut power to the drive if the temperature exceeds the setpoint. A differential pressure switch on the return air line monitors motor pressure. If pressure fails, this switch also cuts power to the drive. When power is applied, the motor undergoes a purge delay period before being energized.


Safety Regulations

National Fire Protection Association regulation number 496 describes how pressurized electrical equipment may be safely deployed in a hazardous environment. The regulation, "Standard for Purged and Pressurized Enclosures for Electrical Equipment in Hazardous (Classified) Locations NFPA 496-1982" may be obtained from the NFPA:

Specifications

  • Type: brushless
  • Applications: for hazardous areas

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