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AS 1033.1-1990
[Current]Specifies requirements for expulsion fuses, including boric acid type, disconnector fuses, and drop-out fuses for use on 50 Hz and 60 Hz alternating current systems of rated voltages above 1000 V, up to and including 72.5 kV. Classifies fuses according to spark production, transient recovery voltage capability, and speed of operation.
Published: 11/06/1990
Pages: 71
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
PREFACE
1 SCOPE AND GENERAL
1.1 SCOPE
1.2 REFERENCED DOCUMENTS
1.3 SERVICE CONDITIONS
1.3.1 Normal service conditions
1.3.2 Special service conditions
1.4 ALTITUDE CORRECTION FACTORS
1.4.1 Altitude correction factors for test voltages and rated voltages
1.4.2 Altitude correction factors for rated current and temperature rise limits
2 DEFINITIONS
2.1 APPLICATION OF SECTION
2.2 TYPES OF FUSE
2.3 ELECTRICAL AND PERFORMANCE CHARACTERISTICS
2.4 FUSES AND THEIR COMPONENT PARTS
3 CLASSIFICATION AND RATINGS
3.1 CLASSIFICATION
3.1.1 General
3.1.2 TRV capability classes
3.1.3 Speed class
3.1.4 Spark production class
3.2 RATINGS
3.2.1 List of ratings
3.2.2 Rated voltage
3.2.3 Rated current
3.2.3.1 General
3.2.3.2 Fuse (complete)
3.2.3.3 Fuse-base
3.2.3.4 Fuse-carrier and Fuse-link
3.2.4 Rated frequency
3.2.5 Rated breaking current
3.2.6 Insulation level (of a fuse-base)
3.2.7 Rated making current
3.2.8 Load switching capacity
4 PERFORMANCE
4.1 BEHAVIOUR ON TEST AND IN SERVICE
4.1.1 General
4.1.2 Standard conditions of use with respect to breaking current
4.1.3 Standard conditions of behaviour with respect to breaking current
4.2 TEMPERATURE RISE
4.2.1 Temperature rise limitations
4.3 TIME/CURRENT CHARACTERISTICS
4.3.1 General
4.3.2 Details of time/current characteristics
4.3.2.1 Presentation of characteristics
4.3.2.2 Scales
4.3.2.3 Paper
4.3.2.4 Decade series
4.3.2.5 Information to be included
4.3.2.6 Values represented by curves
4.4 RADIO INTERFERENCE VOLTAGE
4.5 TENSILE STRENGTH OF FUSE-LINKS
5 TYPE TESTS
5.1 CONDITIONS FOR MAKING THE TESTS
5.2 LIST OF TYPE TESTS
5.2.1 Standard type tests
5.2.2 Test report
5.3 TEST CONDITIONS COMMON TO ALL TYPE TESTS
5.4 DIELECTRIC TESTS
5.4.1 Test conditions
5.4.2 Application of test voltages for impulse and power-frequency tests
5.4.2.1 Earthing
5.4.2.2 Test from terminals to all earthable metal parts
5.4.2.3 Tests between terminals
5.4.3 Atmospheric conditions during test
5.4.4 Test voltages
5.4.5 Lightning impulse voltage dry tests
5.4.6 Power-frequency voltage dry tests
5.4.7 Power-frequency voltage wet tests
5.5 TEMPERATURE-RISE TESTS
5.5.1 Test conditions
5.5.1.1 Test samples
5.5.1.2 Arrangement of the equipment for tests
5.5.2 Measurement of temperature
5.5.3 Ambient air temperature
5.6 BREAKING TESTS
5.6.1 Test conditions
5.6.1.1 General
5.6.1.2 Earthed side screens for single-phase tests
5.6.2 Description of tests to be made
5.6.3 Characteristics of the test circuit
5.6.4 Rated transient recovery voltage
5.6.4.1 General
5.6.4.2 Rated prospective TRV values
5.6.5 Prospective TRV for test duties
5.6.5.1 General
5.6.5.2 Test Duties 1, 2 and 3
5.6.5.3 Test Duty 4
5.6.5.4 Test Duty 5
5.6.5.5 Measurement of TRV
5.6.6 Test samples
5.6.7 Test procedure
5.6.7.1 Calibration of the test circuit
5.6.7.2 Test method
5.6.8 Interpretation of oscillograms (see Figure 5.3)
5.6.9 Parameters to be used for tests
5.6.10 Interpretation of breaking tests for homogeneous design fuses
5.7 TESTS FOR TIME/CURRENT CHARACTERISTICS
5.7.1 Test conditions
5.7.1.1 General
5.7.1.2 Ambient air temperature
5.7.1.3 Arrangement of the equipment
5.7.2 Test procedure
5.7.2.1 Pre-arcing time/current tests
5.7.2.2 Time range
5.7.2.3 Measurement of current
5.7.2.4 Determination of time
5.8 RADIO-INTERFERENCE VOLTAGE (RIV) TEST
6 MARKINGS AND INFORMATION
6.1 IDENTIFYING MARKINGS
6.2 MARKINGS ON THE FUSE-BASE
6.3 MARKINGS ON THE FUSE-CARRIER
6.4 MARKINGS ON THE FUSE-LINK
6.5 INFORMATION TO BE SUPPLIED BY THE MANUFACTURER
APPENDIX A
A1 INTRODUCTION
A2 TIME/CURRENT CHARACTERISTICS
APPENDIX B
B1 INTRODUCTION
B2 MINIMUM SPARK ENERGY
B3 FUSES CONTAINING ORGANIC MATERIALS
B4 SPARK DETECTION METHODS
B4.1 General
B4.2 Ground paper method
B4.3 Optical recording methods
B4.3.1 General
B4.3.2 Open shutter photography
B4.3.3 Videography and cinematography
B4.4 Use of videography or photography with a waterbath
B5 CALIBRATION
B5.1 General
B5.2 Calibration methods
B5.2.1 Production of copper particles for calibration
B5.2.2 Ground paper calibration
B5.3 Calibration of recording method
B5.4 Sparks of metals other than copper
B5.4.1 General
B5.4.2 Equivalence of spark hazard to copper
B5.4.3 Calibration of recording methods
B6 SPARK EMISSION TESTS
B6.1 General
B6.2 Preparation for test
B6.3 Test procedure
B6.4 Assessment and reporting of results
APPENDIX C
C1 INTRODUCTION
C2 PRESENTATION OF CHARACTERISTICS
C3 SPECIAL TYPE TESTS
C4 VARIATION OF TEST CONDITIONS
C4.1 General
C4.2 Spark detection methods
C5 QUALITY ASSURANCE
APPENDIX D
D1 INTRODUCTION
D2 TRV IN SYSTEMS SUPPLIED BY ZONE SUBSTATIONS
D2.1 General
D2.2 Survey of transformers cable connected to outgoing fuses in zone substations
D2.3 Open busbar substations
D2.4 Open busbar substations with multiple outgoing feeders
D3 LINE REFLECTIONS
D4 SOURCE AND LINE SIDE TRANSIENTS
D5 TRV GENERATED BY DISTRIBUTION TRANSFORMERS
D6 TEST DUTY 5
APPENDIX E
1 Introduction
2 Fire ignition
3 Incandescent emissions
3.1 High current arcing
3.2 Explusion fuses
3.3 Particles produced by flame heating
3.4 Particles produced by contact sparking
4 Fire ignition by irradiation
4.1 Comparison of Results From Focussed Sunlight and Irradiation by Spiral Heater
5 Fire ignition by electrically produced droplets
5.1 Test conditions
5.2 Ignition Results
6 Discussion
7 Conclusions
8 Acknowledgments
APPENDIX F
1 Introduction
2 Droplet Production
3 Particle Sizes
3.1 Droplets Falling into a Water Bed
3.2 Particle Break Up Falling into a Dry Bed
4 Fire ignition probability
4.1 Fire ignition results for naturally occurring fuels
4.2 Fire ignition for a cotton bed
5 Exposure to paper sheets
6 Conclusions
7 Acknowledgements
APPENDIX G
1 Introduction
2 Photography
2.1 Theory
2.2 Resolution
2.3 Cooling times
3 Results
3.1 Particle break-up
4 Paper sheets
5 Calibration
6 Conclusions
7 Acknowledgments
Cited references in this standard
IEC 549
High voltage fuses for the external protection of shunt power capacitors
UL 94
Tests for flammability of plastic materials for parts in devices and appliances
[Superseded]
High voltage a.c. switchgear and controlgear — Disconnectors (isolators) and earthing switches
AS 1852(151)
International electrotechnical vocabulary, Electrical and magnetic devices
AS 1852(441)
International electrotechnical vocabulary, Switchgear, controlgear and fuses
Content history
[Superseded]
[Superseded]
[Superseded]
AS 1033.1-1990 REC:2018
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