Do you know what motor you should use when operating in a harsh, heavy or severe duty environment? At minimum, you should be using a Total Enclosed Fan Cooled (TEFC) Severe Duty (SD) motor. But, where do you turn when a standard severe duty motor just isn’t enough? One option worth exploring is an IEEE-841 motor.
When you think about the processes you have in place at your facility that are designed to keep the operation running, the first thing that comes to mind is most likely the PM schedule. You go around monthly or so and check filters, oil levels, temperatures and other detectable signs of easy to remedy issues that are bound to arise. Beyond that, maybe you have a quarterly vibration route and are collecting data on the health of your machines. Usually, this data is worth the cost of the program when it is able to predict an impending failure that can then be repaired before it breaks down catastrophically. This is a solid cost savings and can be easily justified.
You are the Maintenance Manager. You are tasked with keeping the plant running and having adequate replacement spares for critical equipment. It is critical to plant production that you know where every spare piece of equipment is located, that the piece is ready to go into service at a moment’s notice and that the piece of equipment was repaired to your specification during the last time that it was in for service. You don’t have time to physically go searching and certainly don’t want the embarrassment of not knowing where that spare 1000 hp or even 1 hp motor is in the event of an emergency breakdown situation. What could be even worse is knowing where the motor is, taking the time to install, wire, and align the motor only to find that it had not been stored properly and the motor will not run properly. But wait, it can be even worse. You stored the motor properly, you spun the shaft every quarter, kept it clean and dry, you even megged it semi-annually but the shop that repaired it the last time cut some corners, did not follow the specification and the motor is not going to be a viable option to get you out of this breakdown situation.
The term motor management has been used for a variety of items. The most commonly used definition is typically storing motors in a warehouse, what we like to call a "motor hotel." Is simply storing motors the definition of motor management or should it be more?
We say that it should be much more than just storing a few motors. A true motor management program should be looking at everything involved in that motor's life; from purchase to repair to all the different systems it ran as a part of. Motor management is an all encompassing program that lives and breaths reliability and up time.
Managing costs associated with electric motors can be tricky. On one side you have direct acquisition costs. What a motor repair or a replacement motor will cost you. On the other side you have long-term reliability to consider. There is a fine balance to keep here where you do not go "over-board" with reliability measures that then make your motor repair or new purchase way over-priced. On the other hand if you dont factor in any long-term reliability measures, how long will what you are buying last you?