How to Select Transfer Switches

1 Professional Development Hour (PDH)

By attending this session, you will understand the basics of transfer switch selection, including specifying the correct type. Transfer switch equipment is available in a variety of types, with a wide array of features. Selecting the appropriate transfer switch for a specific application requires a clear understanding of site needs and application restraints.

Learning objectives:

  • Discuss the basic operation of transfer switches and transition types to aid in the selection of equipment for a particular application.
  • Discuss features and functions of transfer switch controls to enhance the operation of the power system.
  • Identify when it is appropriate to use a 4-pole switch as compared to 3-pole.
  • Describe the UL 1008 withstand and closing ratings for adequate protection of the switch and overall system.
  • Learn about the difference between the short-circuit withstand/closing rating and the short-time rating.

Course Instructors:
Hassan Obeid, Global Technical Advisor for Systems and Controls – Critical Protection, Cummins

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