1、BRITISH STANDARD BS 6873:1988 Incorporating Amendment Nos. 1, 2 and 3 Specification for Filament lamps for cycles ICS 43.040.20:43.150BS6873:1988 This British Standard, having been prepared under the directionof the Electrical Illumination Standards Committee, was published underthe authority of the
2、 BoardofBSI and comes intoeffecton 29February1988 BSI 04-2000 The following BSI references relate to the work on this standard: Committee reference LGL/6 Draft for comment 85/32861 DC ISBN 0 580 16114 5 Committees responsible for this British Standard The preparation of this British Standard was ent
3、rusted by the Electrical Illumination Standards Committee (LGL/-) to Technical Committee LGL/6 upon which the following bodies were represented: Association of Manufacturers Allied to the Electrical and Electronic Industry (BEAMA Ltd.) British Lighting Association for the Preparation of Standards (B
4、ritlaps) Bus and Coach Council Chartered Institution of Building Services Engineers Consumer Standards Advisory Committee of BSI Electricity Supply Industry in England and Wales Engineering Equipment and Materials Users Association Institution of Lighting Engineers Lighting Industry Federation Ltd.
5、London Regional Transport Ministry of Defence Society of Glass Technology Society of Motor Manufacturers and Traders Ltd. The following body was also represented in the drafting of the standard, through subcommittees and panels: Department of Transport (Highways) Amendments issued since publication
6、Amd. No. Date Comments 6639 April 1991 7757 July 1993 10461 August 1999 Indicated by a sideline in the marginBS6873:1988 BSI 04-2000 i Contents Page Committees responsible Inside front cover Foreword ii Section 1. General 1 Scope 1 2 Definitions 1 3 Marking 2 4 Requirements and tests for inspection,
7、 rating and life 2 5 Conditions of compliance 3 Appendix A Statistical basis of the tests 6 Appendix B Service operation of halogen lamps 6 Appendix C Numbering system for standard lamp data sheets 6 Table 1 Initial torque values 2 Table 2 Inspection test quantities and compliance numbers for5.2.1 3
8、 Table 3 Inspection test quantities and compliance numbers for5.2.2 4 Table 4 Rating test quantities and compliance numbers: wattage and luminous flux 4 Table 5 Test quantities and compliance numbers 5 Section 2. Standard lamp data sheets 7 Publications referred to Inside back coverBS6873:1988 ii BS
9、I 04-2000 Foreword This British Standard has been prepared by Subcommittee CPL/34/1/3, Automobile filament lamps. It includes requirements for all the filament lamps specified in BS6102-3, some of the filament lamps previously specified in BS941, which has been withdrawn, and also some of the filame
10、nt lamps more recently developed of both halogen and non-halogen type. Section one specifies the general requirements for lamps and section2 consists of individual standard lamp data sheets giving details pertinent to each type of lamp. BS 6873 is one of a series of British Standards that have super
11、seded BS941 (which has been withdrawn). The other two British Standards in the series are: BS EN 60809, Filament lamps for road vehicles. Dimensional, electrical and luminous requirements. BS EN 60810, Specification for lamps for road vehicles. Performance requirements. The statistical basis for the
12、 tests on which the standard is based are given inAppendix A. Recommendations for service conditions for halogen lamps are given inAppendix B. The numbering system for standard lamp data sheets is explained inAppendix C. The current status of each data sheet is indicated on page7 (seeAppendix C). Th
13、e amendment by which each page was introduced is indicated by an extension to the shoulder heading at the top of the page (e.g.BS6873:1998/A1:1991). Where no such extension appears, the page is part of the original British Standard. NOTESeveral of the data sheets refer to BS5101-1, which has now bee
14、n withdrawn and superseded by BS EN60061-1. References to BS5101-1 should be read as references to BS EN60061-1. 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 Brit
15、ish 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 and ii, pages1 to 48, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments
16、incorporated. This will be indicated in the amendment table on the inside front cover.BS6873:1988 BSI 04-2000 1 Section 1. General 1 Scope This British Standard specifies requirements for lamps for use in cycle headlamps and rear lamps that operate at supply voltages up to6V. It specifies the techni
17、cal requirements that ensure quality and interchangeability and it describes the methods of test to be used, together with the conditions of compliance to be applied to the results, to decide whether a batch of lamps is acceptable. Section 1 specifies general requirements for lamps and section 2 con
18、sists of individual standard lamp data sheets giving details pertinent to each type of lamp. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this British Standard the following definitions apply. 2.1 type lamps wh
19、ich have the same nominal dimensions, rated voltage, photometric and electrical characteristics 2.2 batch a definite quantity of lamps of one type manufactured under conditions which are presumed uniform 2.3 rated voltage the voltage for which the lamp is designed 2.4 rated wattage the wattage for w
20、hich the lamp is designed 2.5 initial reading the photometric and electrical measurements made at the end of the ageing period 2.6 lumen (Im) the unit of luminous flux. It is equal to the flux emitted within a solid angle of one steradian by a uniform point source of one candela 2.7 ageing the opera
21、tion of a new lamp for a specified period in order to stabilize its photometric and electrical characteristics 2.8 life the number of hours the lamp operates until it fails, or the number of hours assigned to the lamp under the test conditions of this standard 2.9 rated life the life for which the l
22、amp is designed when operated under the test conditions of this standard 2.10 average life the arithmetic mean of the lives of the lamps in the LTQ 2.11 lumen maintenance the ratio between the luminous flux at75% of the rated life and the initial luminous flux of the lamp, expressed as a percentage
23、NOTELumen maintenance is only applicable for lamps with a rated life of100h or more. 2.12 life test voltage the voltage at which the life test is carried out NOTEThis is the rated voltage unless otherwise stated on the appropriate standard lamp data sheet. 2.13 light centre length (LCL) the distance
24、 from the centre of the rectangle which encloses the luminous section of the filament or a defined point on the filament, to a fixed reference plane on the cap NOTEThe reference point is indicated on the appropriate standard tamp data sheet. 2.14 standard lamp a lamp with a colourless bulb and with
25、reduced dimensional tolerances, used for the testing of lighting equipment 2.15 objective value value to be aimed at when the lamp is operated at test voltage 2.16 lateral deviation the perpendicular distance from the geometric centre of the filament to the reference axis of the cap 2.17 reference p
26、lane a plane defined with reference to the cap or base and with respect to which the positions of certain parts of the lamp are measuredBS6873:1988 2 BSI 04-2000 2.18 reference axis an axis defined with reference to the cap or base and with respect to which positions of certain parts of the lamp are
27、 measured 2.19 inspection test quantity (ITQ) the number of lamps to be tested to decide whether a batch satisfies the visual, mechanical and physical requirements of this standard 2.20 rating test quantity (RTQ) the number of lamps to be tested to decide whether a batch satisfies the requirements f
28、or initial readings 2.21 life test quantity (LTQ) the number of lamps to be tested to decide whether a batch satisfies the requirements for life and for lumen maintenance when specified in the data sheets 2.22 rated current the current which the lamp is designed to take when operated at rated voltag
29、e 3 Marking Each lamp shall be distinctly and durably marked with the following information: a) rated voltage; b) rated wattage or rated current. If there is sufficient space, each lamp shall be distinctly and durably marked with the manufacturers identity code or mark. 4 Requirements and tests for
30、inspection, rating and life 4.1 Test quantities 4.1.1 General. Lamps which are accidentally broken during a test shall, when necessary, be replaced to ensure that the required number of lamps complete the test. The results obtained with replacement lamps shall be substituted for those of the broken
31、lamps. NOTEIn order to avoid unnecessary delay, it is recommended that spare lamps be tested with each test quantity. 4.1.2 Inspection test quantity (ITQ). The inspection test quantity shall be a minimum of50lamps selected, at random, from at least10 containers, or from all containers if there are l
32、ess than10. 4.1.3 Rating test quantity (RTQ). The rating test quantity shall be two-fifths of the ITQ selected at random from the light sources of the ITQ which satisfy the individual light source requirements of the inspection test. In the case of a fraction resulting from this calculation, the nex
33、t higher whole number shall be taken. 4.1.4 Life test quantity (LTQ). The life test quantity shall be all lamps which have satisfied the individual light source requirements of the rating test. 4.2 Inspection 4.2.1 Dimensions. The lamps shall comply with the dimensions shown on the appropriate stand
34、ard lamp data sheet. 4.2.2 Bulb. The bulb shall exhibit no scores or spots that might impair the efficiency or optical performance of the lamp. The position of granulation or frosting is specified on the appropriate standard lamp data sheet. NOTEThe bulb should be clear unless otherwise specified by
35、 the purchaser. 4.2.3 Terminations cap. The caps shall be as specified on the appropriate standard lamp data sheet and shall be fixed firmly to the bulbs such that they withstand the initial torque specified in Table 1, without visible relative movement between cap and bulb. The cap shall be held fi
36、rmly without distortion and the appropriate torque gradually applied to the bulb in a clockwise direction and held for5 2s. Table 1 Initial torque values 4.2.4 Solder. Where the lead-out wires are soldered to the cap, the solder shall be applied evenly and in such quantity as to allow proper engagem
37、ent of the cap in the appropriate standard lamp holder and to ensure satisfactory electrical contact. The wire shall not project more than1mm beyond the surface of the solder. 4.3 Rating 4.3.1 Ageing. Before initial readings are taken, the lamps shall be aged at the life test voltage for between15mi
38、n and20min. Cap/base type (see BS5101-1) Initial torque Nm E10/13 0.23 EP10/13 0.23 P13.5s No requirement W2.1 9.5d No requirementBS6873:1988 BSI 04-2000 3 4.3.2 Initial readings. The lamps shall be measured for wattage and luminous flux at rated voltage. 4.4 Life 4.4.1 Operating position. If not sp
39、ecified on the appropriate standard lamp data sheet the lamps under test shall be mounted in horizontal burning position and shall have a free circulation of air in a room temperature not exceeding30 C. The lamps shall maintain their respective burning positions for the entire test. 4.4.2 Test volta
40、ge. The test voltage shall be as specified on the appropriate standard lamp data sheet. The supply shall be either d.c.or a.c.at a frequency between40Hz and60Hz. Short fluctuations from the test voltage shall not exceed 1%. NOTEIn cases of doubt, the test with d.c.is the reference test. 4.4.3 Test p
41、rocedure. Lamps shall be switched off for two periods of not less than15min of each day. Such periods shall not be included as part of the life of the lamp. 4.4.4 Duration of test. The test shall be deemed to have terminated at160% of the minimum average life specified on the appropriate standard la
42、mp data sheet. Any lamp still operating shall be deemed to have a life160% of the specified minimum average life. A lamp which burns out at less than160% of the specified minimum average life shall be deemed to have a life of the number of hours at burn out. 4.4.5 Lumen maintenance. The lumen mainte
43、nance of individual lamps shall be measured at75 5% of the minimum average life specified in the appropriate standard lamp data sheet. If any lamp fails to comply with the specified minimum lumen maintenance it shall be deemed to have a life75% of the specified minimum life. 5 Conditions of complian
44、ce 5.1 General A batch of lamps shall be deemed to comply with this standard if the requirements specified in5.2, 5.3 and5.4 are satisfied. 5.2 Inspection tests 5.2.1 The number of lamps failing to comply with any one of4.2.1 to4.2.4 inclusive shall not exceed the appropriate compliance number inTab
45、le 2. Table 2 Inspection test quantities and compliance numbers for5.2.1 5.2.2 The cumulative number of lamps failing to comply with all of4.2.1 to4.2.4 inclusive shall not exceed the appropriate compliance number in Table 3. 5.3 Rating tests 5.3.1 The number of lamps having initial wattage outside
46、the limits shown for objective wattage on the appropriate standard lamp data sheet shall not exceed the appropriate compliance number in Table 4. 5.3.2 The number of lamps having initial luminous flux outside the limits for objective luminous flux shown on the appropriate standard lamp data sheet sh
47、all not exceed the appropriate compliance number inTable 4. ITQ Compliance number 50 3 51 65 4 66 80 5 81 100 6 101 125 7 126 145 8 146 170 9 171 200 10 201 225 11 226 255 12 256 285 13 286 315 14 316 335 15 336 360 16 361 390 17 391 420 18 421 445 19 446 475 20 476 500 21BS6873:1988 4 BSI 04-2000 T
48、able 3 Inspection test quantities and compliance numbers for5.2.2 Table 4 Rating test quantities and compliance numbers: wattage or luminous flux 5.4 Life tests 5.4.1 The average life of the test quantity shall be not less than90% of the rated life shown on the appropriate standard lamp data sheet.
49、5.4.2 The total number of: a) lamps having less than70% of the minimum average life specified in the appropriate standard lamp data sheet; and b) lamps having failed to comply with the minimum lumen maintenance specified in the appropriate standard lamp data sheet, when tested in accordance with4.4.5 shall not exceed the appropriate compliance number inTable 5. ITQ Compliance number 50 7 51 59 8 60 70 9 71 80 10 81 92 11 93 103 12 104 114 13 115 125 14 126 135 15 136 146 16 147 157 17 158 168 18 169 1
