Chuck Yung
EASA Technical Support Specialist
One frequent request of EASA’s technical support staff is for help in identifying unmarked motor leads. This article introduces a set of procedures for identifying unmarked leads of 6-lead motors with 1 or 2 windings. For most connections, the only tools required for these procedures are an ohmmeter and surge tester.
An additional benefit is that these procedures can be used to identify the type of connection (Table 1); for example, when a motor is received without a nameplate. With 6 leads, the motor connection could be part-winding start, wye-delta, or a 2-speed design.
LOGIN TO VIEW AND DOWNLOAD THE ARTICLE
AVAILABLE IN SPANISH