BS 9150:1983

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 Letters, symbols, signs and abbreviations
1.1.5 Graphical symbols
1.1.6 Marking of the component and package
1.1.7 Eligibility for qualification approval
1.1.8 Structurally similar components
1.1.9 Delayed delivery
1.1.10 Supplementary procedure for qualification
        approval
1.1.11 Certified test records (CTRs)
1.1.12 Preferred ratings and characteristics
1.1.13 Unchecked parameters
1.1.14 Procedure to be followed in the event of
        failures at Group C or Group D inspection
1.1.15 Instructions for ordering relays
1.1.16 Release prior to completion of Group B tests
1.2 Test procedures
1.2.1 Test and measurement conditions
1.2.2 Visual inspection
1.2.3 Dimensioning and gauging procedures
1.2.4 Electrical test procedures
1.2.5 Mechanical test procedures
1.2.6 Environmental test procedures
1.2.7 Endurance test procedures
1.2.8 Thermal test procedures
Section two. General rules for the preparation of
              detail specifications
2.1 General
2.2 Basic information
2.2.1 Originator of the specification
2.2.2 Specification number
2.2.3 Description of the component and intended
        application
2.2.4 Outline drawing
2.2.5 Ratings (including limiting conditions of use)
2.2.6 Characteristics
2.2.7 Related documents
2.2.8 Additional information (not for inspection
        purposes)
2.2.9 Instructions for ordering components
2.3 Inspection requirements
2.4 Certified test records
Appendices
A List of rules documents
B Principles to be observed in the preparation of
        detail specifications when calling up related
        specifications
C Example of a certified test record

Specifies the quality, performance and test procedures for electro-mechanical relays for control and switching circuits whose rated coil voltages do not exceed 500 V a.c. or 440 V d.c. and whose contact ratings do not exceed 20 A a.c. or d.c., 500 V a.c. or 440 V d.c. Also gives general rules for preparing detail specifications, marking requirements and relevant terminology.