FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Identification and classification
4.1 EGLA identification
4.2 EGLA classification
5 Standard ratings and service conditions
5.1 Standard rated voltages
5.2 Standard rated frequencies
5.3 Standard nominal discharge currents
5.4 Service conditions
5.4.1 Normal service conditions
5.4.2 Abnormal service conditions
6 Requirements
6.1 Insulation withstand of the SVU and
the complete EGLA
6.1.1 Insulation withstand of the housing
of the SVU
6.1.2 Insulation withstand of EGLA with
shorted (failed) SVU
6.2 Residual voltages
6.3 High current duty
6.4 Lightning discharge capability
6.5 Short-circuit performance of the SVU
6.6 Mechanical performance
6.7 Weather aging of SVU
6.8 Reference voltage of the SVU
6.9 Internal partial discharges
6.10 Coordination between insulator withstand
and EGLA protective level
6.11 Follow current interrupting
6.12 Electromagnetic compatibility
6.13 End of life
7 General testing procedure
7.1 Measuring equipment and accuracy
7.2 Test samples
8 Type tests
8.1 General
8.2 Insulation withstand tests on the SVU housing
and on the EGLA with failed SVU
8.2.1 General
8.2.2 Insulation withstand test on the SVU
housing
8.2.3 Insulation withstand tests on EGLA with
failed SVU
8.3 Residual voltage tests
8.3.1 General
8.3.2 Procedure for correction and calculation
of inductive voltages
8.3.3 Lightning current impulse residual voltage
test
8.3.4 High current impulse residual voltage test
8.4 Standard lightning impulse sparkover test
8.5 High current impulse withstand test
8.5.1 Selection of test samples
8.5.2 Test procedure
8.5.3 Test evaluation
8.6 Lightning discharge capability test
8.6.1 Selection of test samples
8.6.2 Test procedure
8.6.3 Test parameters for the lightning impulse
discharge capability test
8.6.4 Measurements during the lightning impulse
discharge capability test
8.6.5 Rated lightning impulse discharge capability
8.6.6 List of rated energy values
8.6.7 List of rated charge values
8.7 Short-circuit tests
8.7.1 General
8.7.2 Preparation of the test samples
8.7.3 Mounting of the test sample
8.7.4 High-current short-circuit tests
8.7.5 Low-current short-circuit test
8.7.6 Evaluation of test results
8.8 Follow current interrupting test
8.8.1 General
8.8.2 "Test method A"
8.8.3 "Test method B"
8.9 Mechanical load tests on the SVU
8.9.1 Bending test
8.9.2 Vibration test
8.10 Weather aging tests
8.10.1 General
8.10.2 Sample preparation
8.10.3 Test procedure
8.10.4 Test evaluation
8.10.5 Additional test procedure for polymer
(composite and cast resin) housed SVUs
9 Routine tests
9.1 General
10 Acceptance tests
10.1 General
10.2 Reference voltage measurement of SVU
10.3 Internal partial discharge test of SVU
10.4 Radio interference voltage (RIV) test
10.5 Test for coordination between insulator
withstand and EGLA protective level
10.5.1 General
10.5.2 Front-of-wave impulse sparkover test
10.5.3 Standard lightning impulse sparkover test
10.6 Follow current interrupting test
10.6.1 General
10.6.2 Test procedure
10.6.3 Test sequence
10.6.4 Test evaluation
10.7 Vibration test on the SVU with attached electrode
10.7.1 Test procedure and test condition
10.7.2 Test evaluation
11 Bibliography