In a little more than a year from now, most of your new motors must meet new efficiency levels mandated by federal legislation. On October 24 of next year and thereafter, most new motors manufactured ...

Count AutomationDirect as one of the firms now offering 1-to 10-hp NEMA premium efficiency inverter duty motors. These TEFC motors are said to meet or exceed NEMA Premium efficiencies for optimized ...

NEMA (voltage variation). The tolerance for voltage variation under running conditions in NEMA Std. MG 1, 12.44, is ±10% of rated voltage at rated frequency. If the frequency varies from rated, the ...

New and increasingly stringent efficiency standards have made motor efficiency a priority among motor manufacturers and designers of motor-driven systems. While the Energy Independence and Security ...

This is the second half of a two-part article discussing principles and application of the AC induction motors that provide motive power for most of the equipment HVACR engineers specify. In March, we ...