FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
3.1 General definitions
3.2 Capacitor voltage divider definitions
3.3 Electromagnetic unit definitions
3.4 Carrier-frequency accessories definitions
4 General requirements
5 Service conditions
5.1 Normal service conditions
5.2 Special service conditions
5.3 System earthing
6 Ratings
6.1 Standard values of rated frequency
6.2 Standard values of rated voltages
6.3 Standard values of rated output
6.4 Standard values of rated voltage factor
6.5 Limits of temperature rise
7 Design requirements
7.1 Insulation requirements
7.2 Other insulation requirements
7.3 Short-circuit withstand capability
7.4 Ferro-resonance
7.5 Electromagnetic emission requirements
7.6 Mechanical requirements
7.7 Tightness of capacitor voltage divider and
electromagnetic unit
8 Classification of tests
8.1 Type tests
8.2 Routine tests
8.3 Special tests
8.4 Test sequence for one or two units
9 Type test
9.1 Temperature-rise test
9.2 Capacitance and tan[delta] measurement at
power-frequency
9.3 Short-circuit withstand capability test
9.4 Impulse tests
9.5 Wet test for outdoor capacitor voltage transformer
9.6 Ferro-resonance tests
9.7 Tightness test of a liquid-filled electromagnetic
unit
9.8 Accuracy tests
9.9 Transient response test
9.10 Radio interference voltage test
10 Routine tests
10.1 Tightness of the liquid-filled capacitor voltage
divider
10.2 Power-frequency withstand test and measurement of
capacitance, tan[delta] and partial discharge
10.3 Verification of terminal markings
10.4 Power-frequency withstand tests on the electromagnetic
unit
10.5 Ferro-resonance check
10.6 Accuracy check
11 Special tests
11.1 Measurement of the transmission factor of high
frequency overvoltages
11.2 Mechanical strength test
11.3 Determination of the temperature coefficient (T[C])
11.4 Tightness design test of capacitor units
12 Marking of the capacitor units
12.1 General
12.2 Marking
13 Terminal markings
13.1 General
13.2 Markings
14 Additional requirements for measuring capacitor voltage
transformer
14.1 Accuracy class designation
14.2 Standard reference range of frequency
14.3 Standard accuracy classes
14.4 Limits of voltage error and phase displacement
14.5 Tests for accuracy
15 Additional requirements for protective capacitor voltage
transformers
15.1 Accuracy class designation
15.2 Standard reference range of frequency
15.3 Standard accuracy classes
15.4 Limits of voltage error and phase displacement
15.5 Transient response
15.6 Requirements for secondary windings intended to
produce a residual voltage
16 Rating plate
16.1 Markings of the rating plate
16.2 Example of a typical rating plate
17 Requirements for carrier - frequency accessories
17.1 General
17.2 Drain coil and voltage limitation device
17.3 Type tests for carrier frequency accessories
17.4 Routine tests for carrier frequency accessories
17.5 Marking of the rating plate
Annex A (normative) Typical diagram of a capacitor voltage
transformer
Annex B (informative) Transient response of capacitor voltage
transformer under fault conditions
Annex C (normative) High-frequency characteristics of capacitor
voltage transformers
Bibliography