Free Standards Download

IEEE NESCIR548-2009 pdf download Introduction to the National Electrical Safety Code Discussion: NESC Rule 013.B(3) states that: Where conductors or equipment are added, altered, or replaced on anexisting structure, the structure or the facilities on the structure...

IEEE C62.82.1-2010 pdf download IEEE Standard for Insulation Coordination—Definitions, Principles, and Rules 3.22 nominal system voltage: The rms phase-to-phase voltage by which the system is designated and towhich certain operating characteristics of the system are related. NOTE--The...

IEEE C62.62-2010 pdf download IEEE Standard Test Specifications for Surge- Protective Devices (SPDs) for Use on the Load Side of the Service Equipment in Low-Voltage ( 1000 V and . Less) AC Power Circuits Consideration shall also...

IEEE C62.35-2010 pdf download IEEE Standard Test Methods for Avalanche -unction Semiconductor Surge-Protective Device Components The resistance of the ABD component against specified chemical solvent shall be determined, Themanufacturer shall provide the data if it is required....

IEEE C57.123-2010 pdf download IEEE Guide for Transformer Loss Measurement 3. Transformer no-load losses 3.1 General No-load losses (also referred to as excitation losses, core losses, and iron losses) are a very small part of thepower rating...

IEEE C57.13.5-2009 pdf download IEEE Standard for Performance and Test Requirements for Instrument Transformers of a Nominal System Voltage of 115 kV and Above 3.Definitions For the purposes of this document, the following terms and definitions apply....

IEEE C57.12.34-2009 pdf download Errata to IEEE Standard Requirements for Pad-Mounted, Compartmental-Type, Self-Cooled, Three-Phase Distribution Transformers (2500 kVA and Smaller)- High-Voltage: 34 500 GrdY/19 920 Volts and Below; Low Voltage: 480 Volts and Below 7.2 Tolerance on...

IEEE C57.12.31-2010 pdf download IEEE Standard for Pole-Mounted Equipment- Enclosure Integrity 4.1.3 Welds-Surface preparation All welds shall be treated to prepare the weld area and the heat affected zones for coating. Weld splattershall be removed. All welds...

IEEE C57.12.30-2010 pdf download IEEE Standard for Pole-Mounted Equipment- Enclosure Integrity for Coastal Environments conformance tests: Certain performance tests are conducted to demonstrate compliance with theapplicable standards. The test specimen is normally subjected to all planned rouine...

IEEE C57.12.24-2009 pdf download IEEE Standard for Submersible, Three-Phase Transformers, 3750 kVA and Smaller: High Voltage, 34 500 GrdY/1 9920 Volts and Below; L ow Voltage, 600 Volts and Below 7.5.2 Tank integrity The transformer shall be...