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Power Quality Standards

UIE: International Union for Electricity Applications CENELEC: European Committee for Electrotechnical Standardization UNIPEDE: International Union of Producers and Distributors of Electrical Energy ANSI: American National Standards Institute ANSI C62: Guides and standards on surge protection ANSI C84.1: Voltage ratings for equipment and power systems ANSI C57.110: Transformer derating for supplying non-linear loads CIGRE: International Council …

U.S. Military Power Quality Standards

Summarized by Alex McEachern MIL-STD-1275 “Characteristics of 28 VDC Electrical Systems in Military Vehicles” is a power quality compatibility standard. It applies only to DC power on “ground platforms”, generally vehicles (US military vehicles use 28 VDC, as opposed to the 12 VDC systems generally found in commercial vehicles.) It’s a fairly complete standard, covering …

Industry Specific Power Quality Standards

SEMI Standards The official source of the latest SEMI standards, including F47 and F42, the voltage sag standards. (For a free, fully-licensed copy of SEMI F47 and F42, send an e-mail with your mailing address, etc. to our Free SEMI F47 information pack request) Info about SEMI standards — generally, you’ll want “Standards Publications / …

Utility Power Quality Standards

Companies that deliver electric power – “utility companies”, in American English – have recognized over the last decade or so that their customers need to know what kind of power they can expect. What are utility power quality standards? Information about utility power standards. Here are some examples of published “power quality policies” (my words). …

IEC Power Quality Standards

IEC 61000-4-11 – voltage sag immunity – 16 Amps or less IEC 61000-4-34 – voltage sag immunity – more than 16 Amps IEC 61000-4-30 – power quality measurement methods General IEC Power Quality Standards It can be difficult to find the document you need, but you can purchase published IEC standards with a credit card. You’ll be charged …

IEEE Power Quality Standards

Here you’ll find information about all the IEEE working groups. In general, you can find the minutes of the last meeting for each group; try sending an e-mail to the Chairman of that meeting if you need more information, which is generally free. IEEE SCC-22: Power Quality Standards Coordinating Committee IEEE 1159: Monitoring Electric Power …

CBEMA Power Quality Graph

The CBEMA (Computer and Business Equipment Manufacturers’ Association, typically pronounced sa-BEEM-ah) power quality graph plots the depth of voltage sags on the vertical axis against the duration of voltage sags on the horizontal axis. The green line on the graph shows the sag immunity suggested by CBEMA. The sags above, shown as blue dots, were …

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