This piece was originally published in the October 2016 issue of electroindustry.
Ann Brandstadter, Manager, Standards Publications and Marketing, NEMA
Most NEMA standards, which range across all product divisions, are performance standards that are good for manufacturers because they are continually updated to account for the latest energy-efficiency technology and provide guidelines for installation.
According to Vince Baclawski, senior technical director of codes and standards at NEMA, performance standards set the minimum level of performance that the market can expect in a product that complies with the standard. Installation and maintenance guides, he explained, ensure that equipment performs as designed throughout its expected lifetime.
NEMA’s most popular performance standard is NEMA MG 1 Motors and Generators, the premiere standard for motor construction.
“NEMA MG 1 is a big seller because motors are ubiquitous,” said Mr. Baclawski.
MG 1 addresses new Department of Energy regulations that require motor manufacturers to comply with efficiency targets. The amended electric motor efficiency standard rule redefines electric motors and establishes new classes of motors as regulated in 10 CFR Part 431, Subpart B, made final in May 2014, with an effective date of June 1, 2016.
The rule requires most single-speed induction motors from 1 to 500 hp to meet the premium efficiency levels appearing in NEMA MG 1. Recent revisions to MG 1 include updated 50Hz marking requirements, performance requirements for Inverter-Fed polyphase motors, and additional service condition criteria.
Common examples of motors that rely on MG 1 include those that power production machinery in manufacturing plants, oil field exploration and recovery, heating and air conditioning, and essential components of portable water and fire protection pumping systems.
“MG 1 is the global go-to cookbook for motor efficiency performance levels for small, medium, and large motors,” said Bill Buckson, program manager at NEMA. “The very concept of a NEMA Premium category was first introduced and applied to motors, predicated on the level of efficiency values appearing in the standard’s motor efficiency tables.”
Numerous revisions and changes from the International Electrotechnical Commission (IEC) 60034 Rotating electrical machines standard series have routinely been considered for incorporation into MG 1 by the NEMA 1MG Technical Committee in concert with the U.S. National Committee of the IEC in the interests of technical harmonization.
When it comes to relevant motor premium efficiency performance levels, NEMA MG 1 is considered by those in the know as “The Standard.”Read the October 2016 issue of electroindustry.