IEC 60034-4:2008

FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and units
5 Overview of tests
6 Test procedures
  6.1 General
  6.2 Direct measurements of excitation current at
       rated load
  6.3 Direct-current winding resistance measurements
  6.4 No-load saturation test
  6.5 Sustained three-phase short-circuit test
  6.6 Motor no-load test
  6.7 Phase shifting test
  6.8 Over-excitation test at zero power-factor
  6.9 Negative excitation test
  6.10 On-load test measuring the load angle
  6.11 Low slip test
  6.12 Sudden three-phase short-circuit test
  6.13 Voltage recovery test
  6.14 Suddenly applied short-circuit test following
       disconnection from line
  6.15 Direct current decay test in the armature winding
       at standstill test
  6.16 Suddenly applied excitation test with armature
       winding open-circuited
  6.17 Applied voltage test with the rotor in direct
       and quadrature axis positions
  6.18 Applied voltage test with the rotor in arbitrary
       position
  6.19 Single phase voltage test applied to the three
       phases
  6.20 Line-to-line sustained short-circuit test
  6.21 Sudden line-to-line short-circuit
  6.22 Line-to-line and to neutral sustained short-circuit
       test
  6.23 Negative-phase sequence test
  6.24 Field current decay test, with the armature winding
       open-circuited
  6.25 Field current decay test at rated speed with the
       armature-winding shortcircuited
  6.26 Suddenly applied excitation with armature winding
       short-circuited
  6.27 Field current decay test at standstill with two
       phases of armature winding short-circuited
  6.28 Applied voltage test with rotor removed
  6.29 No-load retardation test
  6.30 Suspended rotor oscillation test
  6.31 Locked rotor test
  6.32 Over-excitation test at zero power factor and variable
       armature voltage
  6.33 Asynchronous operation during the low-voltage test
  6.34 Applied variable frequency voltage test at standstill
7 Determination of quantities
  7.1 Graphic procedures and analysis of oscillographic
       records
  7.2 Direct-axis synchronous reactance
  7.3 Direct-axis transient reactance
  7.4 Direct-axis sub-transient reactance
  7.5 Quadrature-axis synchronous reactance
  7.6 Quadrature-axis transient reactance
  7.7 Quadrature-axis sub-transient reactance
  7.8 Zero-sequence reactance
  7.9 Negative-sequence reactance
  7.10 Armature leakage reactance
  7.11 Potier reactance
  7.12 Zero-sequence resistance
  7.13 Positive-sequence armature winding resistance
  7.14 Negative-sequence resistance
  7.15 Armature and excitation winding resistance
  7.16 Direct-axis transient short-circuit time constant
  7.17 Direct-axis transient open-circuit time constant
  7.18 Direct-axis sub-transient short-circuit time constant
  7.19 Direct-axis sub-transient open-circuit time constant
  7.20 Quadrature-axis transient short-circuit time constant
  7.21 Quadrature-axis transient open-circuit time constant
  7.22 Quadrature-axis sub-transient short-circuit time
       constant
  7.23 Quadrature-axis sub-transient open-circuit time
       constant
  7.24 Armature short-circuit time constant
  7.25 Rated acceleration time and stored energy constant
  7.26 Rated excitation current
  7.27 Excitation current referred to rated armature sustained
       short-circuit current
  7.28 Frequency response characteristics
  7.29 Short-circuit ratio
  7.30 Rated voltage regulation
  7.31 Initial starting impedance of synchronous motors
Annex A (informative) Testing cross-reference
Annex B (informative) Calculation scheme for frequency
        response characteristics
Annex C (informative) Conventional electrical machine model

IEC 60034-4:2008 applies to three-phase synchronous machines of 1 kVA rating and larger with rated frequency of not greater than 500 Hz and not less than 10 Hz. The main changes with respect to the previous edition are as follows:
- removal of certain tests for lack of relevance in current practise;
- addition of provisions for tests on machines with brushless excitation;
- addition of a table of test methods indicating preferred tests and cross-references.