Improper motor storage will result in seriously reduced reliability and failure. An electric motor that does not experience regular usage while being exposed to normally humid atmospheric conditions is likely to develop rust in the bearings or rust particles from surrounding surfaces may contaminate
Improper storage of electric motors in humid conditions can lead to serious reliability issues, including rust on bearings and contamination from surrounding surfaces. This document outlines specific requirements for storing motors that will not be placed in service for at least six months, focusing on environmental controls and physical protection.
The minimum resistance of motor winding insulation must be at least 5 Meg ohms or the calculated minimum, whichever is greater.
The resistance must be measured and recorded every 30 days of storage.
Shock or vibration must not exceed 0.15 in/sec, with a maximum of 0.8 mils at 60 hertz.