The Inertia Load is an optional equipment that consists of an inertia wheel which can be coupled to a drive motor using a rubber belt. For safety purposes, the inertia wheel is enclosed in a metal case with a transparent front door that can be locked. The metal case also serves as a support for the drive motor. The Inertia Load includes a set of 3D drawings that shows how to assemble the unit.

When used with the Three-Phase Motor Starters training equipment package and the optional Power Quality Clamp Meter, the Inertia Load allows students to measure the transient (starting) and steady-state motor's parameters and observe the behavior of an induction motor driving a high-inertia load. Optional manipulations in the student manual supplied with the Three-Phase Motor Starters package indicate how to mechanically couple the Inertia Load to the three-phase induction motor. Optional manipulations using the Inertia Load and the Power Quality Clamp Meter are also suggested in the instructor guide supplied with the Three-Phase Motor Starters package.