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  • How to select an Actuator (part. 3): Electric Actuator
    Electric rotary actuators are basically geared motors with a variety of electrical accessories (limit switches, heater, circuit boards) that may be specified to meet the exact valve automation requirements of a process control system. As an electrical device it is housed in an enclosure designed
  • Does This NEMA Rating Match Your Required IP Rating?
    , fuses, isolation transformers, etc. Two widely accepted rating systems are the NEMA and the IP codes. NEMA, short for National Electric Manufacturers' Association, is commonly specified at installations in the U.S.A. IP, which is an abbreviation for International Protection, is derived from the IEC
  • Understanding Electronic Motor Drives
    magnitude voltage pulses. All PWM drives contain an input converter, dc bus, and output inverter. For simplicity, only one phase of input and output are shown for a 3-phase drive. Selecting the right drive is essential to getting the best performance and efficiency from an electric motor. A motor
  • The Next Generation of US Energy Efficiency Motor Regulations
    The U.S. efficiency regulations for industrial electric motors have been in place since October 1997 when the Energy Policy Act of 1992 (EPAct 92) set minimum efficiency levels for 1- through 200-horsepower (HP), general purpose three-phase motors. EPAct 92 was upgraded when the Energy Independence
  • Improving Energy Efficiency in Pharmaceutical Manufacturing Operations Part I: Motors, Drives and Compressed Air Systems
    performance optimization project at a facility housing pilot plants, mechanical and electrical maintenance shops, laboratories and support functions. After evaluating all electric motors larger than 1.5 hp in the building, the company identified 50 older, standard-efficiency motors that ran for more than
  • Advanced Energy
    efficient electric motors. These motors have efficiency levels that carry the NEMA Premium TM label, a program sponsored by the National Electrical Manufacturer's Association (NEMA). NEMA is a voluntary group of electrical manufacturers that are recognized as North America's authority on motors
  • A Push Towards Efficiency
    Association (NEMA) unveiled its Premium efficient electric motor program in 2001. These motors exceed the minimum energy efficiency standards required by the Energy Policy Act of 1992. In addition, NEMA Premium sets efficiency standards for an increased range of motors. NEMA Premium efficiency may
  • Heading Off a Kilowatt Crunch
    With the stroke of a pen, legislators have forced electric motors to get more efficient. There's more to know ... , Ph.D., Motor Systems Engineer; , Director, Motors and Drives The DOE framework document that specifically defines small motors was first published in June of 2007 and can be found

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