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Category Archives: Compliance Testing

MIL-HDBKs, MIL-STD-704 Guide Avionics Power Testing

Written on May 24, 2018 at 11:03 am, by

By Jon Semancik, Director of Marketing, AMETEK/VTI Instruments  Aircraft electronics and other electrically-powered equipment must be tested under extreme power conditions to ensure it will operate reliably once in the air. In the military world, MIL-STD-704 (now up to rev. F), ‘Aircraft Electric Power Characteristics’, establishes the requirements and characteristics of aircraft electric power. The […]

Total cost of ownership is more than just price

Written on January 4, 2018 at 7:01 am, by

When you purchase a power supply, you need to take into account more than just the price of the supply. The price is just one of the factors in the total cost of ownership. Other factors include: sales and application support, ease of use, downtime for calibration, repair, and upgrades Sales and application support is […]

Introduction to IEC 61000-4-11, Part II – AC source requirements

Written on August 2, 2016 at 7:04 am, by

In Part I, we introduced you to the concept of testing equipment for immunity to voltage dips and short power interruptions in accordance with IEC 61000-4-111. In addition to specifying the test waveforms, the standard also specifies AC source requirements for full compliance testing. Most of these requirements are easily met by the California Instruments […]

Introduction to IEC-61000-4, Part I

Written on July 25, 2016 at 1:14 pm, by

Mains voltage dips and short interruptions can be caused by a wide variety of phenomena and can cause equipment to operate unreliability, and in some cases, can damage the equipment. Faulty loads on an adjacent branch circuit, for example, can cause a circuit breaker to trip, and high-power loads such as welders, motors and electric […]

EN61000-3-2 Sets the Standard for Harmonic Currents

Written on August 4, 2015 at 11:22 am, by

While switch-mode power supplies have many advantages, one of their disadvantages is that they are a non-linear load, and because of that can inject harmonic currents into the electrical distribution system. Devices with switching supplies include domestic appliances (TVs, microwave ovens, lighting equipment and dimmers), and office equipment (PCs, printers). Motor-driven equipment can also cause […]