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P3004.9 - Recommended Practice for the Protection of Power Transformers Used in Industrial and Commercial Power Systems

IEEE's Industrial Applications Society has determined a need for reorganizing the IEEE's Color Books Series, 13 books that currently cover various topics that fall under the purview of the Industrial and Commercial Power Industry. This comprehensive initiative, driven by the volunteer leadership of I&CPS, acknowledges that the continued and long-term maintenance of IEEE's Color Books has been affected by significant attrition due to declining volunteer resources, the complexity involved in updating each book, and content duplication among the books. The existing content will be integrated into a newly proposed structure by technical topics that will allow for easy updating, more streamlined content, and elimination of duplicative material. [Note: This purpose will not be included in the document.]This recommended practice covers the application of fuses and relays for protecting power transformers used in industrial and commercial power systems against damage from overloads and short circuits. Primary substation transformers rated between 1000 kVA and 12 000 KVA with secondary voltages between 2 400 and 13 800 V, and secondary substation transformers rated between 300 kVA and 2500 kVA with secondary voltages of 208 V, 240 V, or 480V are covered. Larger and smaller transformers may also be protected by the devices described in this recommended practice.
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