Why Motors Fail: Part 1

When you think of Franklin Electric, we hope that quality and durability come to mind. That is what we strive for everyday, and after decades of service to the water industry, we are proud to continue providing quality products and reliable support. However, even in the most reliable applications problems can occur, causing a motor to prematurely fail. In the next two issues of the Franklin AID, we’ll examine the most common reasons for application motor failures.

Motor failures come in three basic types: electrical, mechanical and mechanical that progresses into electrical. We’ll first focus on electrical motor failures and next issue will look into mechanical failures. Both will share tips for avoiding application-related problems and getting the longest life out of your pumping installation.

About eighty percent (80%) of electrical motor failures are a result of winding damage in the motor stator, due to either overheating or voltage issues. Electrical motors take electrical energy and convert it into mechanical energy, producing heat as a by-product. In submersible motors, that heat is removed by the flow of the water past the motor. Overheating is always either caused by a lack of cooling flow, or the generation of more heat than can be displaced. Continue reading