Comparison of IEEE 112 and New IEC Standard 60034-2-1

Abstract

This paper describes a comparative study of induction motor testing standards IEEE 112 and newly published IEC 60034-2-1, primarily used in the United States and Europe, respectively. IEC 60034-2-1 has been refined from its earlier version IEC 60034-2 with reference to the IEEE 112. Six induction motors are tested following the two standards and the results are compared with regard to their instrumental accuracy and testing procedures. Power loss results are validated by the calorimetric method. A quantitative method is devised to evaluate the measurement uncertainty that can be interpreted into an efficiency deviation by quadrature addition. This paper is aimed to provide a guideline on interpreting the measured machine efficiency values using these standards and to validate the new IEC standard.

Influence of the Cast Iron Frame on the Distribution of the Magnetic Field in the Stator Yoke and Additional Power Losses in the Induction Motor

“…Eddy current losses are represented by Equation ( 5) and hysteresis losses, assuming a quadratic dependence of losses on the induction, by Equation (6).…”

“…In the European Union, electric motors are divided in terms of efficiency using the IE (international efficiency) classification according to the EN 60034-30-1:2014 standard. The motor is assigned to a given efficiency class by comparing the machine efficiency determined according to an established measurement method (according to the EN 60034-2-1:2007 standard) with the minimum efficiency requirements for a given IE class [6][7][8][9][10][11][12][13]. In HV motors, the use of the magnetic circuit is generally more minor.…”

Study on Precision Selection of Instrument Transformer and its Calibration for Automatic Test System

“…Second, designers tend to buy blindly high-precision instrument transformers to ensure the system accuracy, taking into account the price of instrument, this approach certainly will cause unnecessary waste of money. Third, considering that the system accuracy is influenced by testing method, precision of measurement instrument and working environment etc, the actual situations of system accuracy with the same hardware equipment in different occasions are uneven [2], which hampered the industrial development seriously.…”