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eLibrary > BS IEC 60099-6:2019 Surge arresters - Surge arresters containing both series and parallel gapped structures. System voltage of 52 kV and less >

BS IEC 60099-6:2019 Surge arresters - Surge arresters containing both series and parallel gapped structures. System voltage of 52 kV and less, 2023

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English [Go to Page]
CONTENTS
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Identification and classification [Go to Page]
4.1 Arrester identification
4.2 Arrester classification
5 Standard ratings and service conditions [Go to Page]
5.1 Standard rated voltages
5.2 Standard rated frequencies
5.3 Standard nominal discharge currents
5.4 Service conditions [Go to Page]
5.4.1 Normal service conditions
Tables [Go to Page]
Table 1 – Arrester classification
Table 2 – Steps of rated voltages [Go to Page]
5.4.2 Special environmental conditions
6 Requirements [Go to Page]
6.1 Insulation withstand
6.2 Residual voltages
6.3 Impulse protective levels
6.4 Internal partial discharges
6.5 Seal leak rate
6.6 Thermal stability
6.7 Heat dissipation behaviour of test sample
6.8 Repetitive charge transfer withstand
6.9 Operating duty
6.10 Power-frequency voltage versus time characteristics of an arrester
6.11 Short-circuit performance
6.12 Disconnectors [Go to Page]
6.12.1 Disconnector withstand
6.12.2 Disconnector operation
6.13 Requirements on internal grading components
6.14 Power-frequency sparkover
6.15 Mechanical loads [Go to Page]
6.15.1 General
6.15.2 Bending moment
6.15.3 Resistance against environmental stresses
6.15.4 Insulating base and mounting bracket
6.15.5 Mean value of breaking load (MBL)
6.16 Electromagnetic compatibility
6.17 End of life
7 General testing procedures [Go to Page]
7.1 Measuring equipment and accuracy
7.2 Test samples [Go to Page]
7.2.1 General
7.2.2 Samples for residual voltage tests
7.2.3 Samples for the test to verify the repetitive charge transfer rating, Qrs
8 Type tests (design tests) [Go to Page]
8.1 General
8.2 Insulation withstand tests [Go to Page]
8.2.1 General
Table 3 – Arrester type tests [Go to Page]
8.2.2 Tests on individual unit housing
8.2.3 Ambient air conditions during tests
8.2.4 Wet test procedure
8.2.5 Lightning impulse voltage test
8.2.6 Power- frequency voltage test
8.3 Impulse protective level tests [Go to Page]
8.3.1 General
8.3.2 Residual voltage tests
8.3.3 Sparkover tests
8.4 Test to verify the repetitive charge transfer rating, Qrs [Go to Page]
8.4.1 General
8.4.2 MO resistors
Figures [Go to Page]
Figure 1 – procedure to verify the repetitive charge transfer rating, Qrs, for MO resistors [Go to Page]
8.4.3 Series gaps
8.5 Operating duty tests [Go to Page]
8.5.1 General
Figure 2 – Procedure to verify the repetitive charge transfer rating, Qrs, for series gaps [Go to Page]
8.5.2 Test procedure
Figure 3 – Test procedure to verify the thermal charge transfer rating, Qth
Table 4 – Requirements for high current impulses [Go to Page]
8.5.3 Rated thermal charge values, Qth
8.6 Power-frequency voltage-versus-time test [Go to Page]
8.6.1 General
Table 5 – Rated values of thermal charge transfer rating, Qth [Go to Page]
8.6.2 Test samples
8.6.3 Initial measurements
8.6.4 Test procedure
Figure 4 – Test procedure to verify the power frequencyversus time characteristic (TOV test) [Go to Page]
8.6.5 Test evaluation
8.7 Tests of arrester disconnectors [Go to Page]
8.7.1 General
8.7.2 Operating withstand test
8.7.3 Disconnector operation
8.7.4 Mechanical tests
8.7.5 Temperature cycling and seal pumping test
8.8 Power-frequency voltage sparkover tests
8.9 Short-circuit tests [Go to Page]
8.9.1 General
8.9.2 Preparation of the test samples
Table 6 – Test requirements for porcelain housed arresters
Figure 5 – Examples of arrester units [Go to Page]
8.9.3 Mounting of the test sample
Figure 6 – Examples of fuse wire locations for “Design A“ arresters
Figure 7 – Examples of fuse wire locations for “Design B“ arresters [Go to Page]
8.9.4 High-current short-circuit tests
Figure 8 – Short-circuit test setup for porcelain-housed arresters
Table 7 – Required currents for short-circuit tests [Go to Page]
8.9.5 Low-current short-circuit test
8.9.6 Evaluation of test results
8.10 Test of the bending moment [Go to Page]
8.10.1 General
8.10.2 Overview
8.10.3 Sample preparation
8.10.4 Test procedure
8.10.5 Test evaluation
8.10.6 Test on insulating base and mounting bracket
8.11 Environmental tests [Go to Page]
8.11.1 General
8.11.2 Sample preparation
8.11.3 Test procedure
8.11.4 Test evaluation
8.12 Seal leak rate test [Go to Page]
8.12.1 General
8.12.2 Sample preparation
8.12.3 Test procedure
8.12.4 Test evaluation
8.13 Test to verify the dielectric withstand of internal components [Go to Page]
8.13.1 General
8.13.2 Test procedure
8.13.3 Test evaluation
8.14 Test of internal grading components [Go to Page]
8.14.1 Test to verify long term stability under continuous operating voltage
8.14.2 Thermal cyclic test
9 Routine tests and acceptance tests [Go to Page]
9.1 Routine tests
9.2 Acceptance tests [Go to Page]
9.2.1 Standard acceptance tests
9.2.2 Special thermal stability test
10 Test requirements on polymer-housed surge arresters [Go to Page]
10.1 Scope
10.2 Normative references
10.3 Terms and definitions
10.4 Identification and classification
10.5 Standard ratings and service conditions
10.6 Requirements
10.7 General testing procedure
10.8 Type tests (design tests) [Go to Page]
10.8.1 General
10.8.2 Insulation withstand tests
10.8.3 Impulse protective level tests
10.8.4 Test to verify the repetitive charge transfer rating, Qrs
10.8.5 Operating Duty tests
10.8.6 Power frequency voltage-versus-time test
10.8.7 Tests of arrester disconnectors
10.8.8 Power frequency voltage sparkover tests
10.8.9 Short-circuit tests
Table 8 – Test requirements for polymer-housed arresters
Figure 9 – Short-circuit test setup for polymer-housed arresters [Go to Page]
10.8.10 Test of the bending moment
Figure 10 – Example of a test circuit for re-applying pre-failing circuitimmediately before applying the short-circuit test current
Figure 11 – Thermomechanical test
Figure 12 – Example of the test arrangement for the thermomechanical testand direction of the cantilever load
Figure 13 – Water immersion [Go to Page]
10.8.11 Environmental tests
10.8.12 Seal leak rate test
10.8.13 Test to verify the dielectric withstand of internal components
10.8.14 Test of internal grading components
10.8.15 Weather ageing test
10.9 Routine tests
Annex A (normative)Special Environmental Conditions
Annex B (normative)Typical information given with enquiries and tenders [Go to Page]
B.1 Information given with enquiry [Go to Page]
B.1.1 System data
B.1.2 Service conditions
B.1.3 Arrester duty
B.1.4 Characteristics of arrester
B.1.5 Additional equipment and fittings
B.1.6 Any special abnormal conditions
B.2 Information given with tender
Annex C (normative)Mechanical considerations [Go to Page]
C.1 Test of bending moment
Figure C.1 – Bending moment – multi-unit surge arrester
C.2 Definition of mechanical loads
C.3 Definition of seal leak rate
Figure C.2 – Definition of mechanical loads
C.4 Calculation of wind-bending-moment
Figure C.3 – Surge arrester unit
C.5 Procedures of tests of bending moment for porcelain/cast resin and polymer-housed arresters
Figure C.4 – Surge-arrester dimensions
Figure C.5 – Flow chart of bending moment test procedures [Go to Page]

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