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FUSE SIZING CONSIDERATIONS FOR HIGHER EFFICIENCY MOTORS

When selecting the proper fuse for short circuit protection in motor starting applications, it is important to not only ensure that the fuse will not nuisance open during motor start up times, but also that the fuse will coordinate as required with overload relays. When sizing fuses between 125% and 150% of the motor nameplate current, several advantages, including ease of coordination with an overload device, a smaller disconnect, and increased short circuit protection from a lower fuse rating, can be achieved. However, if sizing at this level prevents the motor from starting, it may then be necessary to increase the fuse ampere rating and it then becomes important to know the NEC sizing limitations. As of June 1, 2016, the US Department of Energy has mandated that newly manufactured electric motors will need to meet NEMA Premium® efficiency standards. As motor efficiencies increase, motor locked rotor currents can also be expected to increase. In addition to this, with across-the-lin

Top 5 Applications for Inductive Sensors on Packaging Machines

Amid the multitude of advanced technologies being integrated into automated packaging operations today, one of the most reliable and versatile component s - inductive sensors - have been holding their own for decades. These simple sensors pack a big punch for OEMs and end users alike. We have compiled a list of the top five places where inductive sensors can positively impact productivity. Many factors make inductive sensing attractive to modern packaging applications. Because the sensor uses inductive variations in an internally generated magnetic field to detect the presence of metallic objects, there is no need for the sensor to physically contact the target itself. That feature alone offers a host of advantages - consistent performance fo r a variety of product or machine position and counting applications in harsh and sanitary environments, resistance to dirt and other substances, adaptability to high - speed functions , and many more.   SICK Inductive Proximity Sensor