IEEE C37.71-1984 pdf free

IEEE C37.71-1984 pdf free.IEEE Standard for Three-Phase, ManuallyOperated Subsurface Load InterruptingSwitches for Alternating-Current Systems. IEEE C37.71 applies to three-phase, group operated,60 Hz, subsurface, load interrupting switches with maximumratings of 600 A and 38 kV, and utilizing separable...
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IEEE C57.12.51-1981 pdf free

IEEE C57.12.51-1981 pdf free.American National Standard Requirements for Ventilated Dry-Type Power Transformers, 501 kVA and Larger,Three-Phase,with High-Voltage 601 to 34 500 Volts,Low-Voltage 208Y/120 to 4160 Volts. All requirements, definitions, and tests, except as specifically covered in this...
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