BS-CECC-96000-1987.pdf

BRITISH STANDARD BS CECC 96000:1987 Harmonized system of quality assessment for electronic components Generic specification: Electromechanical switches UDC 621.316.54.001.4 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:27:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 96000:1987 This British Standard, having been prepared under the direction of the Electronic Components Standards Committee, was published under the authority of the Board of BSI and comes into effect on 31 March 1987 © BSI 09-1999 The following BSI references relate to the work on this standard: Committee reference ECL/21 Draft for comment 83/26674 DC ISBN 0 580 15809 8 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Electronic Components Standards Committee (ECL/-) to Technical Committee ECL/21, upon which the following bodies were represented: British Telecommunications plc Electronic Components Industry Federation Electronic Engineering Association Ministry of Defence National Supervising Inspectorate Society of British Aerospace Companies Limited Telecommunication Engineering and Manufacturing Association (TEMA) The following bodies were also represented in the drafting of the standard, through subcommittees and panels: Association of Control Manufacturers TACMA (BEAMA Ltd.) BEAMA Ltd. Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:27:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 96000:1987 © BSI 09-1999i Contents Page Committees responsible Inside front cover National foreword ii Forewordiii Text of CECC 960001 Publications referred toInside back cover Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:27:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 96000:1987 ii © BSI 09-1999 National foreword This British Standard has been prepared under the direction of the Electronic Components Standards Committee. It is identical with CENELEC Electronic Components Committee (CECC) 96000:1985 “Harmonized system of quality assessment for electronic components. Generic specification: Electromechanical switches”. This standard gives the terminology, quality assessment procedures and test and measurement conditions applicable to electromechanical switches. Any sectional and blank detail specification to be used in conjunction with this standard will select those tests which are considered appropriate and will also give more detailed information. This standard is a harmonized specification within the CECC system. This standard specifies the use of substances and/or test procedures that may be injurious to health if adequate precautions are not taken. It refers only to technical suitability and in no way absolves either the supplier or the user from statutory obligations relating to health and safety at any stage of manufacture or use. Terminology and conventions. The text of the CECC specification has been approved as suitable for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards; attention is drawn especially to the following. The comma has been used throughout as a decimal marker. In British Standards it is current practice to use a full point on the baseline as the decimal marker. Cross-references. The British Standard which implements CECC 00007, CECC 00009, CECC 00107, CECC 00109, and CECC 00111 is BS 9000 “General requirements for a system for electronic components of assessed quality” Part 1 “Specification of basic rules and rules of procedure”. IEC 117 has now been superseded by IEC 617 which is identical with BS 3939 “Graphical symbols for electrical power, telecommunications and electronics diagrams”. International StandardsCorresponding British Standards IEC 68BS 2011 Basic environmental testing procedures (Most Parts are identical) IEC 512BS 5772 Basic testing procedures and measuring methods for electromechanical components for electronic equipment (Most Parts are identical) IEC 695BS 6458 Fire hazard testing for electrotechnical products Part 2-1:1980Section 2.1:1984 Glow-wire test (Identical) Part 2-2:1980Section 2.2:1984 Needle-flame test (Identical) ISO 1000-1981BS 5555:1981 Specification for SI units and recommendations for the use of their multiples and of certain other units (Identical) Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:27:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 96000:1987 © BSI 09-1999iii The Technical Committee has reviewed the provisions of IEC 27, IEC 50 (581) 1978, IEC 65, IEC 341-1 1973, IEC 389-1 1972, IEC 389-1A 1976 and IEC 410, to which reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. IEC 65 is related to BS 415 “Specification for safety requirements for mains-operated electronic and related apparatus for household and similar general use”, and IEC 410 is related to BS 6001 “Sampling procedures and tables for inspection by attributes”. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, the CECC title page, pages ii to iv, pages 1 to 24, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:27:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:27:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:27:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 96000:1987 ii © BSI 09-1999 Contents Page Forewordiii Section 1. Scope 1.1Scope1 1.2Switch classes included1 1.3Switch classes excluded1 Section 2. General 2.1Related documents1 2.2Units, symbols and terminology2 2.3Standard and preferred values4 2.4Marking7 Section 3. Quality assessment procedures 3.1Primary stage of manufacture7 3.2Structural similarity7 3.3Qualification approval procedure7 3.4Quality conformance inspection8 3.5Certified test records8 3.6Delayed delivery8 3.7Re-submission of rejected lots8 3.8Alternative test methods8 3.9Release for delivery before the completion of group B tests8 Section 4. Test and measurement procedures 4.1Standard conditions for testing9 4.2Optional reduction of testing9 4.3Individual test methods10 4.3.1General examination10 4.3.2Electrical continuity and contact resistance11 4.3.3Insulation11 4.3.4Voltage stress12 4.3.5Current carrying capacity12 4.3.6Dynamic stress13 4.3.7Impact stress13 4.3.8Mechanical strength13 4.3.9Endurance15 4.3.10Overload16 4.3.11Climatic16 4.3.12Soldering17 4.3.13Mechanical operating characteristics18 4.3.14Sealing18 4.3.15Chemical resistance19 4.3.16Fire hazard19 4.3.17Capacitance20 4.3.18Illumination20 4.3.19Temperature response20 Appendix A Test schedules for quality conformance inspection and qualification approval21 Figure 1 Application of forces and torques for test 4.3.8.114 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:27:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 96000:1987 © BSI 09-1999iii Foreword The CENELEC Electronic Components Committee (CECC) is composed of those member countries of the European Committee for Electrotechnical Standardization (CENELEC) who wish to take part in a harmonized System for electronic components of assessed quality. The object of the System is to facilitate international trade by the harmonization of the specifications and quality assessment procedures for electronic components, and by the grant of an internationally recognized Mark, or Certificate, of Conformity. The components produced under the System are thereby accepted by all member countries without further testing. This specification has been formally approved by the CECC and has been prepared for those countries taking part in the System who wish to issue national harmonized specifications for ELECTROMECHANICAL SWITCHES. It should be read in conjuction with the current Regulations for the CECC System. At the date of printing of this document the member countries of the CECC are Austria, Belgium, Denmark, Finland, France, Germany, Ireland, Italy, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom, and copies of it can be obtained from the addresses shown on the blue fly sheet. Preface This generic specification was prepared by CECC WG 24 “Switches”. It is based, wherever possible, on the Publications of the International Electrotechnical Commission. The text of this specification was circulated to the CECC for voting in the document listed below and was ratified by the President of the CECC for printing as a CECC specification: The numbering of clauses of this specification does not fully comply with CECC 00 400. DocumentDate of VotingReport on the Voting CECC(Secretariat)1391November 1983CECC(Secretariat)1540 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:27:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:27:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 96000:1987 © BSI 09-19991 Section 1. Scope 1.1 Scope This Generic Specification relates to electromechanical switches intended primarily for use in telecommunications equipment and in electronic equipment employing similar techniques. It is limited to switches with a rated voltage not exceeding 500 V (d.c. or a.c. r.m.s.) and a rated carrying current not exceeding 25 A. It specifies the terms, definitions, symbols, test methods and other material necessary to prepare detail specifications for these components in the CECC System. 1.2 Switch classes included The following classes of switch are covered by this specification, together with their sub-classes. NOTE 1The principal classes of switch listed have been classified according to mode of actuation; classification by other features is permitted: for example, dual-in-line mounting. NOTE 2Each class of switch, inclusive of its sub-classes, is covered by one BDS. NOTE 3All classes of switch may have further sub-classification according to other features relating, for example, to direct or indirect actuation, the provision of illumination or indication, time delay, mounting facilities, and method of termination. The detail specification shall clearly indicate such features. 1.3 Switch classes excluded The following classes of switch are not covered by this specification: relays; circuit breakers; optically activated switches; solid-state switches which are wholly electronic with no integral moving parts (for example touch-sensitive and proximity devices); waveguide switches; coaxial switches. Section 2. General 2.1 Related documents ClassExamples of sub-class Lever (toggle)Rocker Joystick RotaryThumbwheel (edge-mounted) Key activated Sensitive (microswitch) Push-buttonMulticell Matrix Piano-key Keyboard Keypad Slide Non-mechanically activatedTemperature Pressure CECC-00-007Basic specification: Sampling plans and procedures for inspection by attributes CECC-00-009Basic specification: Basic testing procedures and measuring methods for electromechanical components CECC-00-107Quality Assessment Procedures CECC-00-109Certified Test Records CECC-00-111Specifications and their Harmonization Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:27:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 96000:1987 2 © BSI 09-1999 NOTEUnless otherwise specified, the latest issue document is to be used. 2.2 Units, symbols and terminology 2.2.1 General Units, graphical symbols and terminology shall, wherever possible, be taken from the following documents: Any other units, symbols and terminology peculiar to one of the components covered by this specification shall be taken from the relevant IEC or ISO document listed in 2.1. 2.2.2 Classification of switches For the purpose of this specification, switches are classified according to mode of operation of the actuator. Each class of switch is covered by a BDS. a) Lever (toggle) switch. A switch having an actuator in the form of a protruding lever whose movement about an axis parallel to the face of the switch from which it emerges results in the connection or disconnection of the switch terminations in a specified manner. IEC 27Letter symbols to be used in electrical technology IEC 50 (581) 1978International electrotechnical vocabulary (Electromechanical components for electronic equipment) IEC 65Safety requirements for mains operated electronic and related apparatus for household use IEC 68Basic environmental testing procedures IEC 117Recommended graphical symbols IEC 341-11973Push-button switches: General requirements and measuring methods IEC 389-11972Thermostatic switches: General requirements and measuring methods 389-1A1976 IEC 410Sampling procedures and tables for inspection by attributes IEC 512Electromechanical components for electronic equipment: basic testing procedures and measuring methods IEC 512-1 512-2 512-3 512-4 512-5 512-6 512-6A 512-7 512-8 512-9 1976 1976 1976 1976 1977 1977 1980 1978 1980 1977 Part 1: General Part 2: General examination Part 3: Current carrying capacity Part 4: Dynamic stress tests Part 5: Impact tests Part 6: Climatic tests and soldering Part 7: Mechanical operating tests Part 8: Mechanical tests Part 9: Miscellaneous tests IEC 695Fire hazard testing ISO 10001973SI Units and recommendations for the use of their multiples and of certain other units ISO 1000 SI units and recommendations for the use of their multiples and of certain other units. IEC 27 Letter symbols to be used in electrical technology. IEC 50 (581)International Electromechanical Vocabulary: Electromechanical Components for Electronic Equipment. IEC 117Recommended graphical symbols Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:27:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 96000:1987 © BSI 09-19993 1) Rocker switch. A sub-class of lever switch in which the actuator takes the form of a low profile member rocking about an axis parallel to the face of the switch in which it appears. 2) Joystick switch. A sub-class of lever swi