IEEE 112-1984 pdf download

12-27-2020 comment

IEEE 112-1984 pdf free download.IEEE Standard Test Procedure for Polyphase Induction Motors and Generators.
IEEE 112-1984 covers instructions for con- ducting and reporting the more generally ap plicable and acceptable tests to determine the performance characteristics of polyphase in duction motors and generators. The tests described may be applied to both motors and generators, as needed. Additional tests, not specified herein, may be required to satisfy specific research or application needs. These procedures shall not be interpreted as requiring the making of any specific test in a given transaction.
2. References
[1] AIEE Committee Report, Stray Load Loss Measurement in Induction Machines. AIEE Transactions, vol 78, pt III A, pp 67-71, April,1959.
[2] ANSI/IEEE Std 4-1978, IEEE Standard Techniques for High-Voltage Testing.
[3] ANSI/IEEE Std 43-1974(R1979), IEEE Recommended Practice for Testing Insulation Resistance of Rotating Machinery.
[4] ANSI/IEEE Std 100-1977, IEEE Standard Dictionary of Electrical and Electronics Terms.
[5] ANSI/NEMA MG1-1978, Motors and Generators.
[6] IEEE Std 1-1969, IEEE General Principles for Temperature Limits in the Rating of Electric Equipment.
4.1.2 (A-B-C). Rapid changes in frequency cannot be tolerated on input-output tests, as such variations are transmitted to the output- measuring devices. Any departure from as- sumed frequency directly affects the efficiency obtained by Methods A or B. For these meth ods, the frequency shall be measured (or known to be) within 0.5% of the specified test value.
4.2 (All) Instrument Selection. The instru- ments used in electrical measurements shall be selected to give indications well up on the scale, that is, where a fraction of a division is easily estimated and where such a fraction is a small percentage of the value read.
4.3 (Al]) Instrument Transformers. When current and potential instrument transformers are used, corrections shall be made for ratio errors in voltage and current measurements and for ratio and phase-angle errors in power measurements. Readings shall be taken of the electrical input and output, stator winding temperature or stator winding resistance, and slip of each machine. The test shall be re- peated with the direction of power flow r versed. The frequency of the first machine remains unchanged while that of the second is raised to produce the desired load. The location of the instruments and instrument transformers shall not be changed. By this reversal of power flow ordinary calibration errors of all instruments are minimized. Phase-angle errors of the in- strument transformers are cumulative for motoring and generating tests. It is important to make accurate corrections for these phase angle errors, since they will make the losses appear smaller than the true value. See 4.3.IEEE 112-1984 pdf download.

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