1 General
1.1 Scope
1.2 Normative references
1.3 General block diagram of electronic voltage
transformers
2 Definitions
2.1 General definitions
2.2 Additional definitions for single-phase
electronic protective voltage transformers
2.3 Index of symbols
3 General requirements
3.1 General
3.2 Information to be given for enquiries,
tenders and orders
4 Normal and special service conditions
4.1 Normal service conditions
4.2 Special service conditions
4.3 Earthing system
5 Ratings
5.1 Standard values of rated voltages
5.2 Standard values of rated output
5.3 Standard values of rated voltage factor
5.4 Standard values of rated auxiliary power
supply voltage
5.5 Standard reference values of other influencing
parameters
6 Design requirements
6.1 Insulation requirements for primary voltage
sensor
6.2 Insulation requirements for low-voltage
components
6.3 Short-circuit withstand capability
6.4 Limits of temperature rise
6.5 Radio interference voltage requirements
6.6 Transmitted overvoltage requirements
6.7 Electromagnetic compatibility requirements
6.8 Reliability
6.9 Abnormal conditions withstand capability
6.10 Abnormal conditions signalling
6.11 Mechanical requirements
6.12 Earthing terminals
7 Classification of tests
7.1 Type tests
7.2 Routine tests
7.3 Special tests
8 Type tests
8.1 Impulse test on primary voltage terminals
8.2 Wet test for outdoor type electronic voltage
transformers
8.3 Tests for accuracy
8.4 Test for abnormal conditions withstand capability
8.5 Radio interference voltage test
8.6 Transmitted overvoltage test
8.7 Electromagnetic compatibility tests
8.8 Impulse voltage withstand test for low-voltage
components
8.9 Transient performance tests
9 Routine tests
9.1 Verification of terminal markings
9.2 Power-frequency withstand tests on primary
voltage terminals and partial discharge
measurement
9.3 Power-frequency voltage withstand test for
low-voltage components
9.4 Tests for accuracy
10 Special tests
10.1 Chopped lightning-impulse test on primary voltage
terminals
10.2 Measurement of capacitance and dielectric
dissipation factor
10.3 Mechanical strength tests
11 Markings
11.1 Rating plate markings
11.2 Terminal markings
12 Accuracy requirements for single-phase electronic
measuring voltage transformers
12.1 General requirements
12.2 Maintenance requirement
12.3 Accuracy class designation for electronic
measuring voltage transformers
12.4 Standard accuracy classes for electronic
measuring voltage transformers
12.5 Limits of voltage error and phase displacement
for electronic measuring voltage transformers
13 Additional requirements for single-phase electronic
protective voltage transformers
13.1 General requirements
13.2 Maintenance requirements
13.3 Accuracy class designation for electronic
protective voltage transformers
13.4 Standard accuracy classes for electronic
protective voltage transformers
13.5 Limits of voltage error and phase displacement
for electronic protective voltage transformers
13.6 Transient performance requirements
Annex A (normative) Burdens for the transient response test
Annex B (informative) Technical information for electronic
voltage transformers
Annex C (informative) Bibliography
Annex ZA (normative) Normative references to international
publications with their corresponding
European publications