1 - AS 60044.2-2003 INSTRUMENT TRANSFORMERS - SINGLE-PHASE INDUCTIVE VOLTAGE TRANSFORMERS (IEC 60044-2:1997, MOD)
4 - PREFACE
6 - CONTENTS
9 - 1 General
9 - 1.1 Scope
9 - 1.2 Normative references
10 - 2 Definitions
10 - 2. 1 General definitions
10 - 2.1.1 Instrument transformer
10 - 2.1.2 Voltage transformer
10 - 2.1.3 Unearthed voltage transformer
11 - 2.1.4 Earthed voltage transformer
11 - 2.1.5 Primary winding
11 - 2.1.6 Secondary winding
11 - 2.1.7 Secondary circuit
11 - 2.1.8 Rated primary voltage
11 - 2.1.9 Rated secondary voltage
11 - 2.1.10 Actual transformation ratio
11 - 2.1.11 Rated transformation ratio
11 - 2.1.12 Voltage error (ratio error)
11 - 2.1.13 Phase displacement
12 - 2.1.14 Accuracy class
12 - 2.1.15 Burden
12 - 2.1.16 Rated burden
12 - 2.1.17 Output
12 - 2.1.18 Highest voltage for equipment
12 - 2.1.19 Rated insulation level
12 - 2.1.20 Isolated neutral system
12 - 2.1.21 Solidly earthed neutral system
13 - 2.1.22 Impedance earthed (neutral) system
13 - 2.1.23 Resonant earthed (neutral) system
13 - 2.1.24 Earth fault factor
13 - 2.1.25 Earthed neutral system
13 - 2.1.26 Exposed installation
13 - 2.1.27 Non- exposed installation
13 - 2.1.28 Rated frequency
13 - 2.1.29 Rated voltage factor
13 - 2.1.30 Measuring voltage transformer
14 - 2.2 Additional definitions for single- phase inductive protective voltage transformers
14 - 2.2.1 Protective voltage transformer
14 - 2.2.2 Residual voltage winding
14 - 3 General requirements
14 - 4 Normal and special service conditions
14 - 4.1 Normal service conditions
14 - 4.1.1 Ambient air temperature
14 - 4.1.2 Altitude
14 - 4.1.3 Vibrations or earth tremors
14 - 4.1.4 Other service conditions for indoor voltage transformers
15 - 4.1.5 Other service conditions for outdoor voltage transformers
15 - 4.2 Special service conditions
15 - 4.2.1 Altitude
16 - 4.2.2 Ambient temperature
16 - 4.2.3 Earthquakes
16 - 4.3 System earthing
16 - 5 Ratings
16 - 5.1 Standard values of rated voltages
16 - 5.1.1 Rated primary voltages
16 - 5.1.2 Rated secondary voltages
17 - 5.2 Standard values of rated output
17 - 5.3 Standard values of rated voltage factor
18 - 5.4 Limits of temperature rise
19 - 6 Design requirements
19 - 6.1 Insulation requirements
19 - 6.1.1 Rated insulation levels for primary windings
21 - 6.1.2 Other requirements for primary winding insulation
23 - 6.1.3 Between- section insulation requirements
23 - 6.1.4 Insulation requirements for secondary windings
23 - 6.1.5 Requirements for the external insulation
23 - 6.1.6 Requirements for radio interference voltage (RIV)
23 - 6.2 Short- circuit withstand capability
24 - 6.3 Mechanical requirements
24 - 7 Classification of tests
25 - 7.1 Type tests
25 - 7.2 Routine tests
25 - 7.3 Special tests
25 - 8 Type tests
25 - 8.1 Temperature- rise test
26 - 8.2 Short- circuit withstand capability test
26 - 8.3 Impulse test on primary winding
26 - 8.3.1 General
27 - 8.3.2 Lightning impulse test
27 - 8.3.3 Switching impulse test
28 - 8.4 Wet test for outdoor type transformers
28 - 8.5 Radio interference voltage measurement
30 - 9 Routine tests
30 - 9.1 Verification of terminal markings
30 - 9.2 Power- frequency withstand tests on primary windings and partial discharge measurement
30 - 9.2.1 General
31 - 9.2.2 Windings having U
31 - 9.2.3 Windings having U
32 - 9.2.4 Partial discharge measurement
32 - 9.3 Power- frequency withstand tests between sections and on secondary windings
33 - 10 Special tests
33 - 10.1 Chopped impulse test on primary winding
33 - 10.2 Measurement of capacitance and dielectric dissipation factor
33 - 10.3 Mechanical tests
34 - 11 Markings
34 - 11.1 Rating plate markings
35 - 11.2 Terminal markings
35 - 11.2.1 General rules
35 - 11.2.2 Terminal identifiers
35 - 11.2.3 Relative polarities
35 - 12 Accuracy requirements for single-phase inductive measuring voltage transformers
35 - 12.1 Accuracy class designation for measuring voltage transformers
36 - 12.1.1 Standard accuracy classes for measuring voltage transformers
36 - 12.2 Limits of voltage error and phase displacement for measuring voltage transformers
36 - 12.3 Type tests for accuracy of measuring voltage transformers
36 - 12.4 Routine tests for accuracy of measuring voltage transformers
36 - 12.5 Marking of the rating plate of a measuring voltage transformer
37 - 13 Additional requirements for single-phase inductive protective voltage transformers
37 - 13.1 Accuracy class designation for protective voltage transformers
37 - 13.1.1 Standard accuracy classes for protective voltage transformers
37 - 13.2 Limits of voltage error and phase displacement for protective voltage transformers
37 - 13.3 Rated voltages for secondary windings intended to produce a residual voltage
38 - 13.4 Output for secondary windings intended to produce a residual voltage
38 - 13.4.1 Rated output
38 - 13.4.2 Rated thermal limiting output
38 - 13.5 Accuracy class for secondary windings intended to produce a residual voltage
38 - 13.6 Type tests for protective voltage transformers
38 - 13.6.1 Temperature- rise test for residual voltage windings
39 - 13.6.2 Tests for accuracy
39 - 13.7 Routine tests for protective voltage transformers
39 - 13.7.1 Tests for accuracy
39 - 13.8 Marking of the rating plate of a protective voltage transformer