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BS EN 60137:2017 Insulated bushings for alternating voltages above 1000 V, 2018
- undefined
- English [Go to Page]
- CONTENTS
- FOREWORD
- INTRODUCTION
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Ratings [Go to Page]
- 4.1 Rated highest voltage for equipment (Um)
- 4.2 Rated current (Ir)
- 4.3 Rated thermal short-time current (Ith)
- 4.4 Rated dynamic current (Id)
- 4.5 Minimum withstand values of cantilever load
- Tables [Go to Page]
- Table 1 – Minimum values of cantilever withstand load (see 4.5 and 8.10)
- 4.6 Angle of mounting
- 4.7 Minimum nominal creepage distance
- 4.8 Temperature limits and temperature rise
- 4.9 Insulation levels
- Table 2 – Maximum values of temperature and temperature rise above ambient air (see 4.8)
- Table 3 – Insulation levels for highest voltage for equipment (Um) (see 4.9, 8.2, 8.4, 8.5, 9.3 and 9.4)
- 4.10 Test tap on transformer bushings
- 5 Operating conditions [Go to Page]
- 5.1 Temporary overvoltages
- 5.2 Altitude
- Figures [Go to Page]
- Figure 1 – Factor m on the co-ordination switching impulse withstand voltage
- 5.3 Temperature of ambient air and immersion media
- 5.4 Seismic conditions
- Table 4 – Temperature of ambient air and immersion media
- 5.5 Very fast transients (VFT)
- 5.6 Transformer insulating liquid
- 6 Ordering information and markings [Go to Page]
- 6.1 Enumeration of characteristics [Go to Page]
- 6.1.1 General
- 6.1.2 Application
- 6.1.3 Classification of bushings
- 6.1.4 Ratings
- 6.1.5 Operating conditions
- 6.1.6 Design
- 6.2 Markings
- 7 Test requirements [Go to Page]
- 7.1 General requirements
- Figure 2 – Marking plate for bushings for rated highest voltage for equipment (Um) greater than 100 kV
- Figure 3 – Marking plate for bushings for rated highest voltage for equipment (Um) equal to or less than 100 kV, except for bushings for which Figure 4 is applicable
- Figure 4 – Marking plate for bushings for rated highest voltage for equipment (Um) equal to or less than 52 kV made of ceramic, glass or inorganic materials, resin or combined insulation (see 10.3)
- 7.2 Test classification [Go to Page]
- 7.2.1 General
- 7.2.2 Type tests
- 7.2.3 Routine tests
- Table 5 – Applicability of type tests (see 7.2.2, excluding bushings according to Clause 10) [Go to Page]
- 7.2.4 Special tests
- 7.3 Condition of bushings during dielectric and thermal tests
- Table 6 – Applicability of routine tests (see 7.2.3, excluding bushings according to Clause 10)
- Table 7 – Correction of test voltages (see 7.3)
- 8 Type tests [Go to Page]
- 8.1 General
- 8.2 Dry or wet power-frequency voltage withstand test [Go to Page]
- 8.2.1 Applicability
- 8.2.2 Test method and requirements
- 8.2.3 Acceptance
- 8.3 Long duration power-frequency voltage withstand test (ACLD) [Go to Page]
- 8.3.1 Applicability
- 8.3.2 Test method and requirements
- 8.3.3 Acceptance
- 8.4 Dry lightning impulse voltage withstand test [Go to Page]
- 8.4.1 Applicability
- 8.4.2 Test method and requirements
- Figure 5 – Voltage profile for long duration test [Go to Page]
- 8.4.3 Acceptance
- 8.5 Dry or wet switching impulse voltage withstand test [Go to Page]
- 8.5.1 Applicability
- 8.5.2 Test method and requirements
- 8.5.3 Acceptance
- 8.6 Thermal stability test [Go to Page]
- 8.6.1 Applicability
- 8.6.2 Test method and requirements
- 8.6.3 Acceptance
- 8.7 Electromagnetic compatibility tests (EMC) [Go to Page]
- 8.7.1 Emission test
- 8.7.2 Immunity test
- 8.8 Temperature rise test [Go to Page]
- 8.8.1 Applicability
- 8.8.2 Test method and requirements
- 8.8.3 Acceptance
- 8.9 Verification of thermal short-time current withstand [Go to Page]
- 8.9.1 Applicability
- 8.9.2 Verification method and requirements
- 8.9.3 Acceptance
- 8.10 Cantilever load withstand test [Go to Page]
- 8.10.1 Applicability
- 8.10.2 Test method and requirements
- 8.10.3 Acceptance
- 8.11 Tightness test on liquid-filled, compound-filled and liquid-insulated bushings [Go to Page]
- 8.11.1 Applicability
- 8.11.2 Test method and requirements
- 8.11.3 Acceptance
- 8.12 Internal pressure test on gas-filled, gas-insulated and gas-impregnated bushings [Go to Page]
- 8.12.1 Applicability
- 8.12.2 Test method and requirements
- 8.12.3 Acceptance
- 8.13 External pressure test on partly or completely gas-immersed bushings [Go to Page]
- 8.13.1 Applicability
- 8.13.2 Test method and requirements
- 8.13.3 Acceptance
- 8.14 Verification of dimensions [Go to Page]
- 8.14.1 Applicability
- 8.14.2 Acceptance
- 9 Routine tests [Go to Page]
- 9.1 General
- 9.2 Measurement of dielectric dissipation factor (tan δ ) and capacitance at ambient temperature [Go to Page]
- 9.2.1 Applicability
- 9.2.2 Test method and requirements
- 9.2.3 Acceptance
- 9.3 Dry lightning impulse voltage withstand test [Go to Page]
- 9.3.1 Applicability
- 9.3.2 Test method and requirements
- 9.3.3 Acceptance
- 9.4 Dry power-frequency voltage withstand test [Go to Page]
- 9.4.1 Applicability
- Table 8 – Maximum values of tan δ and tan δ increase (see 9.2) [Go to Page]
- 9.4.2 Test method and requirements
- 9.4.3 Acceptance
- 9.5 Measurement of partial discharge quantity [Go to Page]
- 9.5.1 Applicability
- 9.5.2 Test method and requirements
- 9.5.3 Acceptance
- 9.6 Tests of tap insulation [Go to Page]
- 9.6.1 Applicability and test requirements
- 9.6.2 Acceptance
- Table 9 – Maximum values of partial discharge quantity (see 8.3 and 9.5)
- 9.7 Internal pressure test on gas-filled, gas-insulated and gas-impregnated bushings [Go to Page]
- 9.7.1 Applicability
- 9.7.2 Test method and requirements
- 9.7.3 Acceptance
- 9.8 Tightness test on liquid-filled, compound-filled and liquid-insulated bushings [Go to Page]
- 9.8.1 Applicability
- 9.8.2 Test method and requirements
- 9.8.3 Acceptance
- 9.9 Tightness test on gas-filled, gas-insulated and gas-impregnated bushings [Go to Page]
- 9.9.1 Applicability
- 9.9.2 Test method and requirements
- 9.9.3 Acceptance
- 9.10 Tightness test at the flange or other fixing device [Go to Page]
- 9.10.1 Applicability
- 9.10.2 Test method and requirements
- 9.10.3 Acceptance
- 9.11 Visual inspection and dimensional check [Go to Page]
- 9.11.1 Applicability
- 9.11.2 Acceptance
- 10 Requirements and tests for non-capacitance graded bushings of rated highest voltages for equipment up to and including 52 kV [Go to Page]
- 10.1 General
- 10.2 Temperature requirements
- 10.3 Level of immersion medium
- 10.4 Markings
- 10.5 Test requirements [Go to Page]
- 10.5.1 General
- 10.5.2 Type tests
- 10.5.3 Routine tests
- Table 10 – Applicability of type tests for bushings according to Clause 10 (see 10.5.1)
- 11 Recommendations for transport, storage, erection, operation and maintenance [Go to Page]
- 11.1 General
- 11.2 Conditions during transport, storage and installation
- 11.3 Installation
- 11.4 Unpacking and lifting
- Table 11 – Applicability of routine tests for bushings according to Clause 10 (see 10.5.3)
- 11.5 Assembly [Go to Page]
- 11.5.1 General
- 11.5.2 Mounting
- 11.5.3 Connections
- 11.5.4 Final installation inspection
- 11.6 Operation
- 11.7 Maintenance [Go to Page]
- 11.7.1 General
- 11.7.2 Recommendation for the manufacturer
- 11.7.3 Recommendations for the user
- 11.7.4 Failure report
- 12 Safety [Go to Page]
- 12.1 General
- 12.2 Electrical aspects
- 12.3 Mechanical aspects
- 12.4 Thermal aspects
- 13 Environmental aspects
- Annex A (informative) Determination of the hottest spot in bushings with conductors embedded in the insulation material
- Bibliography [Go to Page]
