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1、BRITISH STANDARD BS CECC 42200:1988 Harmonized system of quality assessment for electronic components Sectional specification: Surge suppression varistors UDC 621.38:621.315.592:621.3.015.3 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:04:33 GMT+00:00 2006,
2、 Uncontrolled Copy, (c) BSI BS CECC 42200:1988 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 30 September 1988 BSI 10-1999 The following BSI references r
3、elate to the work on this standard: Committee reference ECL/4 Draft for comment 81/28139 DC ISBN 0 580 16847 6 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/
4、4, 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 Ltd. Telecommunication Engineering and Manufac
5、turing Association (TEMA) The following body was also represented in the drafting of the standard, through subcommittees and panels: BEAMA Ltd. Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:0
6、4:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 42200:1988 BSI 10-1999i Contents Page Committees responsibleInside front cover National forewordii Forewordiii Text of CECC 422001 Publications referred toInside back cover Licensed Copy: London South Bank University, London South Bank Universi
7、ty, Fri Dec 08 17:04:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 42200:1988 ii BSI 10-1999 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) 422
8、00:1986 “Harmonized system of quality assessment for electronic components. Sectional specification: Surge suppression varistors”. This standard is a harmonized specification within the CECC system. Terminology and conventions. The text of the CECC specification has been approved as suitable for pub
9、lication 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 us
10、e a full point on the baseline as the decimal marker. Cross-references. The British Standard which implements CECC 00100 is BS 9000 “General requirements for a system for electronic components of assessed quality” Part 2: “Specification for national implementation of CECC basic rules and rules of pr
11、ocedure”. International StandardCorresponding British Standard CECC 42000:1978BS CECC 42000:1978 Harmonized system of quality assessment for electronic components: Generic specification: Varistors (Identical) aISO 3:1973 BS 2045:1965 Preferred numbers (Technically equivalent) BS 2011 Basic environme
12、ntal test procedures bIEC 68-1:1982 Part 1.1:1983 General and guidance (Identical) Part 2.1 Tests IEC 68-2-1:1974Test A: 1977 Cold (Identical) IEC 68-2-2:1974Tests B: 1977 Dry heat (Identical) IEC 68-2-3:1969Test Ca: 1977 Damp heat, steady state (Identical) IEC 68-2-20:1979Test T: 1981 Soldering (Id
13、entical) IEC 68-2-27:1987Test Ea: 1988 Shock (Identical) IEC 68-2-29:1987Test Eb: 1987 Bump (Identical) IEC 695-2-2:1980BS 6458 Fire hazard testing for electrotechnical products Part 2 Methods of test Section 2.2:1984 Needle-flame test (Identical) a ISO = International Organization for Standardizati
14、on. b IEC = International Electrotechnical Commission. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:04:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 42200:1988 BSI 10-1999iii A British Standard does not purport to include all the necessary provisio
15、ns 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,
16、 pages ii to iv, pages 1 to 12, 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
17、 University, Fri Dec 08 17:04:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:04:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: London South Bank University, London South Bank University, Fr
18、i Dec 08 17:04:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 42200:1988 ii BSI 10-1999 Contents Page Forewordiii Section 1. Scope1 Section 2. Preferred characteristics, ratings and severities for environmental tests1 2.1Climatic severities1 2.2Ratings and characteristics1 2.3Severities for e
19、nvironmental tests3 2.4Information to be given in a detail specification3 Section 3. Inspection4 3.1Formation of inspection lots4 3.2Test methods5 3.3Qualification approval5 Table 12 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:04:33 GMT+00:00 2006, Uncont
20、rolled Copy, (c) BSI BS CECC 42200:1988 BSI 10-1999iii 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
21、assessed quality. The object of the System is to facilitate international trade by the harmonization of 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
22、 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 detail specifications for SURGE SUPPRESSION VARISTORS. It should be read in co
23、njunction with the current regulations for the CECC System. At the date of printing of this specification 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. Pr
24、eface This sectional specification was prepared by CECC Working Group 4: “Resistors”. This is one of a series of sectional specifications, all relating to the generic specification printed as CECC 42000. It is based, wherever possible, on the Publications of the International Electrotechnical Commis
25、sion. The text of this sectional specification was circulated to the CECC for voting in the documents listed below and was ratified by the President of the CECC for printing as a CECC Specification. DocumentVoting DateReport on the Voting CECC(Secretariat)1227 CECC(Secretariat)1228 CECC(Secretariat)
26、1229 13 December 1982 8 October 1982 8 October 1982 CECC(Secretariat)1344 CECC(Secretariat)1344 CECC(Secretariat)1344 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:04:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: London South Bank Un
27、iversity, London South Bank University, Fri Dec 08 17:04:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 42200:1988 BSI 10-19991 Section 1. Scope This sectional specification prescribes the preferred values for characteristics and ratings and the test severities for varistors intended to prote
28、ct electronic and other sensitive equipment from surges and operating from a d.c. supply or an a.c. supply having a frequency not greater than 400 Hz. Varistors which are the subject of this sectional specification will not necessarily give primary protection against lightning surges. Section 2. Pre
29、ferred characteristics, ratings and severities for environmental tests 2.1 Climatic severities The varistors covered by this document are classified into climatic categories according to the general rules given in the Appendix to IEC 68-1. The standard severities for the cold, dry heat, and damp hea
30、t steady state tests are within the following ranges: The severities for the cold and dry heat tests are the lower and upper category temperatures. For some varistors, these temperatures will occur between two of the preferred temperatures given in IEC 68-2. In this case, the nearest preferred tempe
31、rature within the category temperature range of the varistors shall be chosen for this severity. 2.2 Ratings and characteristics The values given in detail specifications shall preferably be taken from the following: 2.2.1 Maximum voltages The maximum continuous a.c. voltage shall be selected from t
32、he values listed in Table 1 ensuring that the maximum continuous d.c. voltage, which is interdependent, is not exceeded. NOTEThe relationship between the voltages is: Cold (test A) (IEC 68-2-1) 10 C to 55 C Dry heat (test B) (IEC 68-2-2)+ 70 C to + 155 C Damp heat, steady state (test C) (IEC 68-2-3)
33、 4, 10, 21 or 56 days (not applicable to uncoated types which have a -/-/00 category) Maximum continuous a.c. r.m.s, voltage = 1,1 supply voltage Maximum continuous d.c. voltage = (for metal oxide types) 1,1 1,3 supply voltage Maximum continuous d.c. voltage = (for silicon carbide types) 1,1 1,15 su
34、pply voltage Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:04:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 42200:1988 2 BSI 10-1999 Table 1 2.2.2 Surge ratings Values in amperes shall be selected from the R 10 series of ISO 3. 2.2.3 Voltage at clas
35、s current (protection levels) Values shall be selected from the R 40 series of ISO 3. 2.2.4 Class current Values shall be selected from the R 10 series of ISO 3 with decimal multiples and sub-multiples. 2.2.5 Leakage current Values shall be taken from the R 10 series in ISO 3. The specified voltage
36、for leakage current shall be the maximum continuous d.c. voltage. For metal oxide varistors the leakage current shall be u 315 4A. 2.2.6 Derating curves The following curves shall be applied: a) Maximum continuous a.c. or d.c. voltages Supply voltage Maximum continuous a.c. voltage Maximum continuou
37、s d.c. voltage Maximum continuous d.c. voltage (V r.m.s.)(V r.m.s.)Zn OSi C 60 80 110 120 150 220 230 240 280 380 400 415 440 480 500 660 1 000 66 88 121 132 165 242 253 264 308 418 440 456 484 528 550 726 1 100 86 114 157 172 215 315 329 343 400 543 572 592 629 686 715 944 1 430 76 101 139 152 190
38、278 291 304 354 481 506 525 557 607 633 835 1 265 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:04:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 42200:1988 BSI 10-19993 b) Maximum peak current 2.3 Severities for environmental tests 2.3.1 Solderabili
39、ty Solder bath method: Test Ta (IEC 68-2-20) 235 5 C 2.3.2 Resistance to soldering heat As in test Tb method 1A (IEC 68-2-20) 2.3.3 Shock 2.3.4 Bump 2.3.5 Vibration 2.4 Information to be given in a detail specification The following information shall be given in each detail specification and the val
40、ues shall preferably be selected from those given in the appropriate clause of this specification. NOTEThe information given in 2.4.1 to 2.4.8 may, for convenience, be presented in tabular form. 2.4.1 Maximum continuous a.c. voltage (B.2.1 of CECC 42000) (See 2.2.1 and Table 1) Test Ea (IEC 68-2-27)
41、 Acceleration: 490 m/s2 Pulse duration:11 ms Test Eb (IEC 68-2-29) Acceleration: 390 m/s2 Number of bumps: 4 000 10 Procedure: B4 Amplitude: 0,75 mm or acceleration: 98 m/s2 (whichever is less severe) Frequency range : 10 Hz to 55 Hz Sweep endurance: Total duration: 6 h Licensed Copy: London South B
42、ank University, London South Bank University, Fri Dec 08 17:04:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 42200:1988 4 BSI 10-1999 2.4.2 Supply voltage (B.2.2 of CECC 42000) (See 2.2.1 and Table 1) 2.4.3 Maximum continuous d.c. voltage (B.2.2 of CECC 42000) (See 2.2.1 and Table 1) 2.4.4 L
43、eakage current (B.2.6 of CECC 42000) (See 2.2.5) 2.4.5 Surge rating (B.2.5 and B.2.8 of CECC 42000) The detail specification shall specify the class current and/or the energy surge rating. (See 2.2.2.) 2.4.6 Voltage at class current (Protection level) (B.2.7 of CECC 42000) (See 2.2.3.) 2.4.7 Isolati
44、on voltage (Insulated varistors only.) The isolation voltage shall be 2,5 times the maximum continuous a.c. voltage. The duration of the voltage proof test shall be 10 s. 2.4.8 Insulation resistance (insulated varistors only) The insulation resistance shall be W 10 M7 before humidity tests and 1 M7
45、after the humidity tests. 2.4.9 Marking The marking shall be in accordance with 2.4 of CECC 42000 except that the following requirements shall replace those given in 2.4.1.1. a) Supply voltage. b) Number of the detail specification and, if appropriate, style reference. c) Date of acceptance. d) Manu
46、facturers name or trade mark. 2.4.10 Dimensions The numerical value in millimetres shall be given for such of the following dimensions as are applicable, and it shall be stated which dimensions are suitable for gauging. The detail specification shall state such other dimensional information as will
47、adequately describe the varistor. Section 3. Inspection 3.1 Formation of inspection lots An inspection lot shall consist of varistors of the same style. It should be representative of those extremes of rated voltages which have been produced during the period. The samples for Groups C and D shall be
48、 collected over the last 13 weeks of the inspection period. Where a lot is formed from specimens of different termination variants, the lot shall contain an equal portion of each termination variant. Body diameter: D Body thickness, including terminations of styles with wire terminations: W Diameter
49、 of wire terminations: d Length of wire termination: 1 Distance between wire terminations: A Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 17:04:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS CECC 42200:1988 BSI 10-19995 3.1.1 Structural similarity Varistors within the scope of this sectional specification may be grouped as structurally similar for the purpose of forming inspection lots provided that the following requirements are met: a) They have been produced by one manufacturer on one site using essent
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