Dynamometer and test stand considerations: Upfront analysis and planning can save time, money on purchase, installation
Progressive end users/motor owners these days have a greater appreciation for and understanding of motor reliability. However, many no longer accept the premise that a quality rebuild is accomplished because experienced, well trained technicians serviced a motor and applied static and/or run testing which resulted in a motor with improved reliability. Many end users have developed stringent motor re-pair specifications to which the motor rebuilder must comply. More frequently, end users are requiring that the service center provide proof of compliance. This often equates to a series of qualifying tests that may include having the service provider perform a load test on the serviced motor. The load test can be the "acid test" which validates that the repair services rendered meets with the end user's specifications and/or the original manufacturer's design criteria. Some end users are exposed to non-compliant issues when their driven equipment is the "load test." Considering the vast array of motor types, not every test system is capable of testing every type of motor under every type of load condition. A detailed study of your customer's motor types and test requirements will help fine tune the capabilities required for load testing. It should not be assumed that every repaired motor should be or needs to be load tested. It is up to the service center to examine the needs and requirements of their customers and then make an informed decision regarding the investment in load testing equipment. The objective here is not to provide instructions on how to load test motors. The objective is to provide tips regarding peripherals that may come into play with the purchase and installation of a test stand and a dynamometer.