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Severe Duty Electric Motors: IEEE 841 Then and Now When NEMA established IEEE 841 in 1986, “rugged duty” motors could simply mean motor parts were cast iron or coatings and shafts were constructed to resist moisture and rust. Each motor manufacturer defined “severe duty” motors differently. This left users without a measurable standard to specify…
Electrical motors are vital to keeping your production moving, but they can also create unnecessary, and unexpected costs. Over time, those costs can creep up. Rising motor costs can be driven by a number of factors such as: 1. The application or environment exceeds motor capability, leading to premature failure 2. Undiagnosed operations issues, leading…
A severe duty motor, in short, is an improvement over a standard totally enclosed fan cooled (TEFC) motor. They are tougher and better suited to an industrial environment. There is no standard specification on what a severe duty motor is, so designs vary. They could be viewed as a step between a full IEEE 841…
The ODP vs TEFC debate has been extensively covered by others, but our repair shops find evidence of poor performing ODP applications on a monthly basis. Open drip proof motors are just that – open. It’s like an open door from whatever is outside, to your bearings and windings on the inside. At one…
Selecting NEMA motors- TEFC, severe duty, or IEEE 841 Making the right choice for low voltage motors can greatly affect total cost and reliability. There are so many types and manufacturers of motors that it can be difficult to make the right selection for any given application. Our test teams and repair shops will occasionally…