All major manufacturers of three-phase ac induction motors offer “inverter-duty” or “inverter-ready” models, but while these motors have inverter-rated insulation to protect the windings, the bearings — their most vulnerable parts — are too often ignored.
Cerus Industrial’s P-Series variable frequency drives (VFDs) are now available with a redundant drive, ensuring continuous, efficient operation with no mechanical bypass.
The Air-Conditioning, Heating, and Refrigeration Institute (AHRI) has announced the publication of an industry-first standard for variable frequency drives (VFDs). As with all AHRI Standards, 1210 (I-P)-2011 & 1211 (SI)-2011, Performance Rating of Variable Frequency Drives, are available free of charge on AHRI’s website at www.ahrinet.org.
Photos from the 2013 ACCA Conference & IE3 Expo in Orlando, Fla.
Podcasts
Cade Clark, assistant vice president of government affairs for the Air-Conditioning, Heating & Refrigeration Institute (AHRI), gives a brief overview of the new version of the Shaheen-Portman bill, what AHRI thinks of the energy-efficiency legislation, and how it might affect the HVACR industry if it becomes law.
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