IEEE DRAFT C57.12.90 : D5.1 98

CLAUSE
1 Overview
2 References
3 Definitions
4 General
4.1 Type of tests
4.2 Test requirements
4.3 Test sequence
4.4 Instrumentation
5 Resistance measurements
5.1 Determination of cold temperature
5.2 Conversion of resistance measurements
5.3 Resistance measurement methods
6 Polarity and phase-relation tests
6.1 Subtractive and additive polarity
6.2 Polarity tests: single-phase transformers
6.3 Polarity and phase-relation tests: poly-phase transformers
7 Ratio tests
7.1 General
7.2 Tolerances for ratio
7.3 Ratio test methods
8 No-load losses and excitation tests
8.1 General
8.2 No-load loss test
8.3 Waveform correction of no-load losses
8.4 Temperature correction of no-load losses
8.5 Determination of excitation (no-load) current
9 Load losses and impedance voltage
9.1 General
9.2 Factors affecting the values of load losses and
      impedance voltage
9.3 Test for measuring load losses and impedance voltage
9.4 Calculation of load losses and impedance voltage from
      test data
9.5 Zero-sequence impedance
10 Dielectric tests
10.1 General
10.2 Switching impulse test procedure
10.3 Lightning impulse test procedure
10.4 Routine impulse test for distribution transformers
10.5 Low-frequency tests
10.6 Applied voltage tests
10.7 Induced voltage tests for distribution and class I
      power transformers
10.8 Induced voltage test for class II power transformers
10.9 Partial discharge measurement
10.10 Insulation power factor tests
10.11 Insulation resistance test
11 Temperature rise
11.1 Ambient temperature measurement
11.2 Liquid rise
11.3 Average winding temperature-rise measurement
11.4 Other temperature measurements
11.5 Test methods
11.6 Corrections of temperature rises for difference in altitude
12 Short circuit tests
12.1 Scope
12.2 Test connections
12.3 Test requirements
12.4 Test procedure
12.5 Proof of satisfactory performance
13 Audible sound emission
13.1 General
13.2 Instrumentation
13.3 Test conditions
13.4 Microphone positions
13.5 Sound power rating
13.6 Presentation or results
14 Calculated data
14.1 Reference temperature
14.2 Losses and excitation current
14.3 Efficiency
14.4 Voltage regulation and constant-voltage transformer
15 Certified test data
16 Bibliography

Gives procedure for performing tests that are specified in IEEE C57.12.00 - 1993 and other standards that apply to liquid-immersed distribution, power and regulating transformers. Intended to be used as a basis for performance, safety and the proper testing of such transformers. Applies to all liquid-immersed transformers except instrument transformers, step-voltage and induction voltage regulators, arc furnace transformers, rectifier transformers, specialty, grounding and mine transformers.