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...
IEEE 251-1984 pdf free
IEEE 251-1984 pdf free.IEEE Guide: Test Procedures forDirect-Current Tachometer Generators. IEEE 251 Direct-readingindicatinginstruments,either analog or digital type, maybe used for some tests where the specifiedtolerances are large compared with the instrument accuracy. When an indicating instrumentis used，it...
IEEE 142-1982 pdf free
IEEE 142-1982 pdf free.IEEE Recommended Practice for Grounding of Industrial and Commercial Power Systems. IEEE 142 problem of groundfaultprotection devices typically installed inlow-voltage main circuit breakers, servicebreakers,etc, is that a ground fault in acable or equipment of...
IEEE 112-1984 pdf free
IEEE 112-1984 pdf free. IEEE Standard Test Procedure for Polyphase Induction Motors and Generators. IEEE 112 Polyphase induction ma-chines are normally given a routine test，butmay be given additional tests. For typical routine tests refer to ANSI/NEMA MG1-1978,2...
IEEE 91-1984 pdf free
IEEE 91-1984 pdf free.IEEE Standard Graphic Symbols for Logic Functions. IEEE 91 comprises an outline or combination of outlines together with one or more qualifying symbols. Applicationof the symbols requires, in addition, the representation of input and...
IEEE 81-1983 pdf free
IEEE 81-1983 pdf free.IEEE Guide for Measuring Earth Resistivity, Ground Impedance, andEarth Surface Potentials of a GroundSystem. IEEE 81 the purpose of this guide to describe and discuss the present state of the technique of measuring ground resistanceand...
IEEE C62.33-1982 pdf free
IEEE C62.33-1982 pdf free.IEEE Standard Test Specifications for Varistor Surge-Protective Devices. IEEE C62.33 applies to varistors for surge protective applications on systems with dc to 420 Hz frequency andvoltages equal to or less than 1000 V rms,...
IEEE 3-1982 pdf free
IEEE 3-1982 pdf free.IEEE Recommended Practice in the Selection of Reference Ambient Conditions for Test Measurements of Electrical Apparatus. IEEE 3-1982 test results and the performance ofelectrical apparatus are significantly influencedby variations in such parameters as temperature,barometric...
IEEE C57.94-1982 (R2006) pdf free
IEEE C57.94-1982 (R2006) pdf free.IEEE Recommended Practice for lnstallation，Application, Operation, andMaintenance of Dry-Type General Purpose Distribution and PowerTransformers. IEEE C57.94 following American National Standards referred to in this recommended practice are superseded by arevision approved by the American...
IEEE C57.13.3-1983 pdf free
IEEE C57.13.3-1983 pdf free.IEEE Guide for the Grounding oflnstrument Transformer SecondaryCircuits and Cases. IEEE C57.13.3 emphasis of this guide is personnel safety and proper performance of relays at powerline frequencies.Thegrounding and shielding of cables and other grounding...