Motor test equipment is used to measure and evaluate various electrical characteristics and performance parameters of motors. Motor test equipment can be either offline with no power supplied to the motor, or online where power is applied and the motor is running. Motors can be tested either standalone on a test bench or in situ while installed in the equipment they power. Motor test equipment enables maintenance and management programs to improve equipment readiness and uptime while reducing capital overhead.

Motor test equipment works by attaching three voltage probes and three current probes to the three input wires of the motor. Internal voltmeters, ammeters, and ohmmeters take measurements and make calculations to arrive at the various performance parameters. Motor test equipment services also recommend electric motor impulse testing, electric motor rotation testing, wound rotor motor testing, and electric motor insulation resistance testing. The recommended electric motor tests to be performed by motor test equipment are stator winding resistive imbalance testing, stator winding insulation resistance testing, polarization index testing, step voltage testing, and surge testing.

The recommended spare electric motor tests to be performed by motor test equipment include stator winding resistive imbalance testing, stator winding insulation resistance testing, polarization index testing, step voltage testing, and surge testing.

The recommended new/refurbished electric motor tests to be performed by motor test equipment include stator winding resistive imbalance testing, stator winding insulation resistance testing, polarization index testing, step voltage testing, and surge testing.

There are many types of motor test equipment including online and offline motor test equipment, single-phase and three-phase motor test equipment, portable motor test equipment, benchtop motor test equipment, and rack-mount motor test equipment. The more sophisticated and expensive motor test equipment tests for more parameters, performs more complicated analyses, has graphical displays, and can store and export test data.

Motor test equipment is used for repair, maintenance, design verification, failure analysis, and testing of electrical motors. Motor test equipment can improve the overall efficiency and lifespan of motors. Motor test equipment is used to manage and monitor equipment processes in a production environment. Motor test equipment should complete tasks quickly and accurately. Motor test equipment integrates a series of test steps that are automatically sequenced and the decisions relating to the acceptability of the motor under test are made automatically.