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BS 9120:1988

Current

Current

The latest, up-to-date edition.

Specification for radio interference suppression filters of assessed quality: generic data and methods of test

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

29-02-1988

Foreword
Committees responsible
Specification
Section one. Principles and mandatory procedures
1.1 General matters
1.1.1 Scope
1.1.2 Related documents
1.1.3 Terminology
1.1.4 Letter symbols, signs and abbreviations
1.1.5 Graphical symbols
1.1.6 Marking
1.1.7 Eligibility for qualification approval
1.1.8 Structurally similar components
1.1.9 Delayed delivery
1.1.10 Supplementary procedures for qualification
        approval
1.1.11 Certified test records
1.1.12 Ratings and characteristics
1.1.13 Uncheck parameters
1.1.14 Procedure to be followed in the event of a
        failure in a periodic test
1.1.15 Release for delivery before completion of group
        B tests
1.1.16 Component parts of filter assemblies
1.1.17 Capability approval
1.2 Test procedures
1.2.1 General
1.2.2 Measurement conditions
1.2.3 Visual examination
1.2.4 Dimensions and gauging
1.2.5 Electrical test procedures
1.2.6 Mechanical test procedures
1.2.7 Environmental testing procedures
Section two. General rules for the preparation of detail
specifications
2.1 Basic information
2.1.1 General
2.1.2 Originator of the detail specification
2.1.3 Detail specification number
2.1.4 Description of the component and intended
        application
2.1.5 Drawings
2.1.6 Ratings (including limiting conditions of use)
2.1.7 Related documents
2.1.8 Additional information that is not for inspection
        purposes
2.2 Inspection requirements
2.2.1 General
2.2.2 Group A inspection
2.2.3 Group B inspection
2.2.4 Group C inspection
2.2.5 Group D inspection
2.3 Certified test records
2.3.1 General information
2.3.2 Attributes information
2.3.3 Measurements information
2.4 Instructions for ordering components
2.5 Low-volume, high-cost items
Appendices
A. Example of a certified test record
B. Voltage proof test
C. Measurement of leakage current (mains filter units
     only)
D. Endurance tests for mains filter units
E. Test for electrical shock hazard under normal
     conditions
F. Tests on cable or cords and their anchorage to
     filter units
G. Temperature rise at rated current test
H. Spike test
J. Measurement of connector contact resistance
K. Dust and sand resistance test
Tables
1. Peak pulse voltages
2. Filter unit terminations
3. Insertion loss limits
4. Creepage and clearance limits
5. Test voltages for insulation resistance
6. Tensile test force for wire terminations
7. Cable sizes and current ratings
8. Maximum sizes of cables and conduit for rated
     currents up to 16 A
9. Number of 24 h cycles
10. Inspection procedure for filters. Group A tests
11. Inspection procedure for filters. Group B tests
12. Inspection procedure for filters. Group C tests
13. Inspection procedure for filters. Group D tests
14. Values for endurance testing
15. Final inspection, measurements and requirements
16. Number of specimens to be tested for rated voltage
     (mains filter units only)
17. Minimum creepage and clearance distances at rated
     voltages
18. Torque values for screws and nuts
19. Cable pulling
20. Permissible cable and cord masses for given rated
     current
Figures
1. D.C. voltage proof test circuit
2. Class II single-phase filter units
3. Single-phase filter units other than class II
4. Three-phase filter units
5. Application of test voltage
6. Spike test circuit detail

Prescribes terms, methods of test and inspection requirements for radio interference suppression filters, including mains filter units, for use in the electrical power supply to electronic or electric equipment.

Committee
W/-
DevelopmentNote
Supersedes 84/29805 DC, 92/29914 DC and BS 9120(1984). To be read in conjunction with BS 9000(1967). (09/2005) Inactive for the new design. (09/2007)
DocumentType
Standard
Pages
32
PublisherName
British Standards Institution
Status
Current
SupersededBy
Supersedes

This British Standard establishes terms, methods of test and inspection procedures for radio interference suppression filters of assessed quality for use in electronic equipment and in the electrical power supply to equipment, appliances, machines and apparatus. It includes safety requirements and tests which may be mandatory, according to the application.

NOTE. The filter may form part of equipment to which other safety requirements apply, e.g. BS 415, BS 3456.

This standard is intended to be used in conjunction with BS 9000 and with related detail specifications in which are stated the dimensions, ratings, tests and requirements applicable to individual filters or series of filters.

BS 9121:1988 Blank detail specification for radio interference suppression filters of assessed quality. Basic and full assessment levels
BS 9125:1988 Specification for capability approval of manufacturers of passive radio interference suppression filter units of assessed quality generic data

BS 6001-1(1999) : 1999 SAMPLING PROCEDURES FOR INSPECTION BY ATTRIBUTES - PART 1: SAMPLING SCHEMES INDEXED BY ACCEPTANCE QUALITY LIMIT (AQL) FOR LOT-BY-LOT INSPECTION
BS 923-2:1980 Guide on high-voltage testing techniques Test procedures
BS 2045:1965 Preferred numbers
BS 4727(1971) : LATEST
BS 6299:1982 Methods of measurement of the suppression characteristics of passive radio interference filters and suppression components
BS 9070-1&2(1969) : 1969 AMD 7393 SPECIFICATION FOR FIXED CAPACITORS OF ASSESSED QUALITY: GENERIC DATA AND METHODS OF TEST - PRINCIPLES AND MANDATORY PROCEDURES - GENERAL RULES FOR DRAFTING DETAIL SPECIFICATIONS
BS 2011(1967) : LATEST
BS 5775-4:1979 Specification for quantities, units and symbols Heat
BS 6217:1981 Guide to graphical symbols for use on electrical equipment

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