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Calculating Voltage Drop for Safety and Performance

Posted on 8/3/20 4:02 PM

You have a cord connected to a power source on one end and a machine on the other. The good news is that you have power and the machine is working. The bad news is that you have just started using the machine without calculating for voltage drop as the cord length is 65 feet—for long cord assemblies (50 feet or more) it’s important to calculate voltage drop due to potential safety risks.  

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Topics: electrical safety, voltage drop, product design, safety

Interpower Ultrasonic Welding: The “Sonic” That Keeps on Booming

Posted on 6/22/20 2:33 PM

In comparison to the fireworks of traditional welding’s molten metal, ultrasonic welding is more a wisp of smoke and a tip of the magician’s hat. In the mid to late 1990s, ultrasonic welding had ventured well beyond its plastics and automotive roots of the 1960s and 1980s respectively. By the dawn of the new millennium, ultrasonic welding had expanded far beyond toys and automobile subsystems—it was wired into the consumer electronics industry, including medical devices and components. Though lacking the cachet of robotics and CAD-CAM, ultrasonic welding was already well versed in the language of manufacturing. 

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Topics: product design, testing, designing for export, ultrasonic weld

Part II RoHS: Interpower's Commitment to Compliance in Europe

Posted on 5/26/20 3:44 PM

Previously we covered RoHS history and the successive directives published by the EU regarding the restrictions of the quantities of certain hazardous substances used in electrical and electronic equipment in European countries: lead (Pb), mercury (Hg), cadmium (Cd), hexavalent chromium (CrVI), polybrominated biphenyls (PBB), polybrominated diphenyl ethers (PBDE), and four different phthalates: DEHP, BBP, BBP, and DIBP.

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Topics: product design, designing for export, RoHS, European Union Compliance

UL 60320/817 Requirement Changes Approach May 2021 Effective Date

Posted on 5/11/20 12:00 PM

60320-3 A little over a year ago, UL announced Certification Requirement Changes in a Revision/Edition published for 60320-3, Appliance Couplers for Household and Similar General Purposes—Part 3: Standard Sheets and Gauges on 02/15/2019. These have an Effective Date of 05/12/2021 and may be applicable to your products.

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Topics: product design, IEC 60320, testing agencies, UL

Many Names, Many Applications: The High Potential Voltage (Hipot) Test

Posted on 4/27/20 10:44 AM

Dielelectric Voltage-withstand or Dielectric-strength tests are often referred to as the High Potential Voltage “Hipot” test. It’s one of the most common yet important safety and diagnostic tests used for electrical and electronic components and devices—it can be used in both the design phase and the production phase in the manufacturing of electrical products.

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Topics: product design, testing, Hipot

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