Is there an efficient way competitively bid my entire motor base?
Yes. The first step is to specify what you need from your supplier. How should motors be shipped, how should returns be handled, and who will manage your motor inventory? A common mistake is to simply bid out your entire motor list, which is exhaustive and time consuming. Do make sure you have an accurate assessment of your installed base and rank the list by criticality. Quotes for commonly used low voltage motors can be sourced through multiple sources. But quotes for motors with special configurations and medium voltage motors should be provided by suppliers with support services to help manage your risk. Contact us for an excel template to help manage supplier selection and bidding.
What can I do when the motor manufacturer cannot meet required delivery on a purchase due to a special modification?
There are options. In some cases we can make the modification in one of our shops. This could be a conversion base, change in mounting configuration, shaft modification, or addition of accessories such as encoders. There may also be an option to purchase an aftermarket asset to meet your needs. It is often possible to find an alternative.
How can I ensure that I have the best mix of spare motors on hand?
An installed based evaluation and criticality assessment will illuminate gaps and redundancy in inventory. We can also inspect motors in storage for operational readiness, which will often lead to additional discovery.
Is there a way to maximize the warranty on motors in storage?
There are options depending on the supplier. We offer an in-service warranty that will extend your warranty from the time of installation. This is offered as part of our storeroom and repair management programs.
How do I make a decision to repair or to replace a failed motor?
There is plenty of written material on this, though the decision is complicated by several factors. Three important aspects are the replacement costs, the quality of the motor to be repaired, and the standard (specification) it will be repaired to. The combination will greatly impact the resulting attractiveness of the repair. Another factor is energy, which may need to be measured to obtain an accurate ROI analysis.
My motor shop says that humidity is causing low insulation resistance readings (low meg ohms) in several repaired motors in storage. How can I prevent that?
Your motor insulation system should be well protected from moisture and airborne contaminants, especially after leaving a repair shop. Motor insulation degrades mechanically and electrically. The result is that while electrically sound under “clean” testing conditions, the insulation will later absorb moisture, reducing its resistance to ground. Your shop should catch this during inspection and recommend corrective action (if possible), a rewind, or replacement.
I just received a proposal to replace a motor with a more efficient model. The payback period looks aggressive, so how can I be confident in this energy payback analysis?
You really cannot, especially if it is a significant investment. Distributors are taught by manufacturers to conduct a very basic analysis based on a set of variables that are often held to a “favorable” constant. Actual load, phase balance, efficiency, and other factors impact the potential return. If the investment is significant we recommend you contact an energy-consulting firm or allow us to measure analyze the actual running conditions for you.