PCTTS 177: 20XX
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PCTTS 177: 20XX
TRINIDAD AND TOBAGO STANDARD
TUNGSTEN FILAMENT LAMPS FOR GENERAL SERVICE - SPECIFICATIONS
(2nd revision)
PCTTS 177: 20XX
Copyright ©
This Trinidad and Tobago Bureau of Standards [Compulsory Standard], is copyright-protected by the Standards Act 1997 and neither this document nor any extract from it may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, photocopying, recording or otherwise, without prior written permission being secured from the Trinidad and Tobago Bureau of Standards.
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Macoya, Tunapuna,
P.O. Box 467, Port of Spain
Trinidad and Tobago
Phone: 662-TTBS E-MAIL:
Reproduction may be subject to royalty payments or a licensing agreement.
Gr.
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PCTTS 177: 20XX
GENERAL STATEMENT
The Trinidad and Tobago Bureau of Standards (the Bureau) is a body corporate established under the authority of the Standards Act No. 18 of 1997 (herein after referred to as the Standards Act).
In accordance with the Standards Act, the Bureau shall promote and encourage the development and maintenance of standards and further shall establish standards for the following: to improve goods produced or used in Trinidad and Tobago; to ensure industrial efficiency and development; to promote public and industrial welfare, health and safety; and to protect the environment.
The Bureau develops standards through consultation with relevant interest groups, and public comment is invited on all draft standards before they are declared as Trinidad and Tobago Standards in accordance with the provisions of the Standards Act.
The Bureau is the legal custodian of the Trinidad and Tobago Standard Mark, which is issued in accordance with the Standards Act. When a Trinidad and Tobago Standard Mark appears on any product, or in connection with any service, process or practice, it provides assurance that such a product, service, process or practice conforms to a Trinidad and Tobago Standard.
The Bureau’s Standards Information Centre maintains a reference library of standards, including local, regional and international standards and is the national node of the International Organization for Standardization Information Network (ISONET). The Centre also acts as the sales agent for the publications of foreign and international standards organizations.
NOTE In order to keep abreast of progress in the industries concerned, Trinidad and Tobago Standards are subject to periodic review. Suggestions for improvements are welcome.
AMENDMENTS ISSUED SINCE PUBLICATION
AMENDMENT NO. / DATE OF ISSUE / TEXT AFFECTED
ATTACHMENT PAGE FOR TTBS AMENDMENT SHEETS
TRINIDAD AND TOBAGO STANDARD
TUNGSTEN FILAMENT LAMPS FOR GENERAL SERVICE - SPECIFICATIONS
(2nd Revision)
PCTTS 177: 2003
The Specifications Committee responsible for the revision of this Trinidad and Tobago Standard is as follows:
Specifications Committee
Members Representing
Mr Steve Gittens (Chairman) Laboratory Services Division, TTBS
Mr Chad Lue Choy TYE Manufacturing Company Limited
Mr George Sampson Ministry of Public Utilities
Mr Urban Duke and the Environment, Government Electrical Inspectorate
Mr Ray McCarthy Ministry of Legal Affairs,
Ms Ingrid Prescod Consumer Affairs Division
Mr Wayne Mohammed Atlantic Trading Company Limited
Ms Sharma Sookram
Mr William Murray Implementation Division, TTBS
Ms Nadita Ramachala (Technical Secretary) Standardization Division, TTBS
Contents
Foreword 1
1 Scope 2
2 Normative references 2
3 Terms and definitions 3
4 Selection of lamps for testing 5
4.1 General 5
4.2 Samples for testing shall be selected from lamps belonging to one batch 5
5 Test procedure 6
5.1 Test quantities 6
5.2 Inspection test 6
5.3 Lamp dimensions 7
5.4 Caps 7
5.5 Solder 7
5.6 Rating test – Initial wattage and luminous flux 8
5.7 Lumen maintenance 8
6 Conditions of compliance 9
6.1 General conditions 9
6.2 Inspection test - Mechanical and physical requirements 9
6.3 Rating test – Initial wattage and luminous flux 10
6.4 Life test – Lumen maintenance and life 10
6.5 Qualifying limits for compliance of individual batches 10
Annex A (normative) Inspection test 11
Annex B (normative) Initial readings 16
Annex C (normative) Life performance 17
Annex D (normative) Torsion test holder for Screw type lamp caps 18
Annex E (normative) Torsion test holder for Bayonet type lamp caps 19
Figures
Figure A.1 - Typical general service Tungsten Filament lamp 12
Figure A.2 - Screw type lamp cap 14
Figure A.3 - B22d/25 x 26 Bayonet type lamp cap 15
Figure D.1 - Torsion test holder for Screw type caps on finished lamps 18
Figure E.2 - Torsion test holder for Bayonet type caps on finished lamps 19
Tables
Table 1 - Characteristics of Tungsten Filament lamps covered by this standard 2
Table 2 - Qualifying limits for compliance of individual batches 10
Table A.1 - Inspection test 13
Table A.2 - Dimensions of Screw type lamps caps 14
Table A.3 - Dimensions of B22d Bayonet type lamp caps 15
Table C.1 - Luminous flux ratio_Toc59435538 17
Table D.1 - Dimensions of Torsion test holder for Screw type lamp caps 18
Table E.2 - Dimensions of Torsion test holder for Bayonet type lamp caps 19
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PCTTS 177: 20XX
Foreword
This specification was declared a Trinidad and Tobago Standard (Second Revision) with effect from…………. after the draft was finalized by the Specifications Committee on Tungsten Filament lamps and approved by the Trinidad and Tobago Bureau of Standards.
This standard is the second revision of the Trinidad and Tobago Standard entitled ‘Specification for Tungsten Filament Lamps for General Service‘, numbered TTS 26 25 500: 1994.
This standard has been formulated to define minimum levels of quality and performance of Tungsten Filament general purpose lamps. It is also intended to assist manufacturers in the sampling and testing of finished lamps.
This National Standard was revised in order to incorporate a wider range of Tungsten Filament lamps manufactured. The scope of the standard has been expanded to cover soft white bulbs. Other changes include revisions of the following: sampling procedure, rating test, life test and lumen maintenance requirements.
The Trinidad and Tobago Bureau of Standards has recommended that this standard be declared a compulsory standard so as to protect the consumer or user against danger to health or safety.
This standard will be effective as a compulsory standard on a date to be notified by the Minister responsible for the Trinidad an Tobago Bureau of Standards in a Notice to be published in the Trinidad and Tobago Gazette, as required by the Standards Act.
In preparing this standard, assistance was derived from the following:
¾ IEC 60064:1993 Tungsten filament lamps for general service; and
¾ IEC 60061-1: 1993 Lamps caps and holders together with gauges for the control of interchangeability and safety lamps caps.
The main voltage used in Trinidad and Tobago is 115 volts, with a relative tolerance of 6 % (mainly for domestic purposes) or 230 volts, with a relative tolerance of 6 % (mainly for industrial use). However the range of operating voltage for lamps has been extended to 277 volts in this standard.
Annexes A-E are normative and provide the test methods required by this National Standard.
1 Scope
This standard covers the technical requirements and methods of test for Tungsten Filament lamps for domestic purposes, having the following characteristics:
a) a rated wattage of 25 to 500 watts inclusive;
b) a rated voltage of 110 to 277 volts inclusive;
c) a minimum life of 1000 hours;
d) clear, white, internally frosted, equivalently coated or coloured bulbs; and
e) normal Bayonet or Edison screw caps, as set out in Table 1.
This standard does not apply to fluorescent lights.
Table 1 - Characteristics of Tungsten Filament lamps covered by this standard
Rating / Cap / Bulb finishVoltage
V / Wattage
W
Between
110 and 277 / 25
40
60
75
100
150
200 / E27/27
E26/24
or
B22d/25 x 26 / Clear or white or internally frosted or equivalently or coloured finishes
300 / E27/27, E26/24,
E40/45
B22d/25 x 26
500 / E40/45 / Clear
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, subsequent amendments to, or the revisions of, any of these publications do not apply.
IEC 60061-1: 1993 Lamps caps and holders together with gauges for the control of interchangeability and safety- Part 1: Lamps caps
IEC 60061-3: 1969 Lamps caps and holders together with gauges for the control of interchangeability and safety- Part 3: Gauges
IEC 60064: 1993 Tungsten Filament lamps for general service
TTS 76–2 Requirements for labelling – Part 2: Labelling of pre-packaged goods
3 Terms and definitions
For the purposes of this document the following terms and definitions shall apply:
3.1 ageing means the operation of a new lamp for a specified period in order to stabilize its electrical and photometric characteristics before the initial readings are taken.
3.2 average life means the arithmetic mean of the lives of the individual lamps of the life test quantity (LTQ).
3.3 accelerated life test means a life test performed at a voltage greater than the rated voltage.
3.4 batch means all the lamps of one type put forward at one time for acceptance.
3.5 box means a rectangular container, with a flap.
3.6 cap means the lamp base which mechanically holds the lamp in place during use.
3.7 carton means a multiple or bulk container for lamps
3.8 envelope means the bulb or the glass enclosure for the lamp.
3.9 Finish means the coating applied to the bulb.
NOTE Finishes can be clear, phosphor coated or diffuse and can be internally or externally applied.
3.10 Frosted (or internally frosted) means a type of finish applied to the envelope by etching.
3.11 inspection test quantity (ITQ) means the number of lamps to be tested with the intention of determining acceptability, either of the whole production or of the batch, as related to dimensional requirements.
3.12 lamp sleeve means an open-ended packaging which holds one or more lamps.
3.13 life means the total time for which a lamp has been operated before it becomes useless, or to any other criterion of life performance laid down in this standard.
3.14 life test means the test for the determination of lamp life and maintenance of luminous flux.
3.15 life test quantity (LTQ) means the number of lamps to be tested with the intention of determining acceptability, either of the whole production or of the batch, as related to life.
3.16 light centre length means the distance from the geometrical centre of the filament to the contact plates of the cap, including the solder.
3.17 lighting design lumens means a value of lumens provided for the guidance of lighting engineers and it corresponds with the rated luminous flux.
3.18 lumen means the unit of luminous flux which is equal to the flux emitted in a solid angle of one steradian by a uniform point source of one candela.
NOTE: The Candela (abbreviation: cd) is the luminous intensity in a given direction of a source that emits monochromatic radiation of frequency 540 x 1012 Hz, that has a radiant intensity in the direction of 1/683 watts per steradian.
3.19 lumen maintenance means the ratio of the luminous flux (lumens) at 75% of the rated life to the initial luminous flux (lumens), expressed as a percentage.
3.20 nominal life means the number of hours for which the lamp will operate at its rated voltage, as published by the manufacturer.
3.21 rated luminous flux means the lumen value declared by the manufacturer.
3.22 rating test quantity (RTQ) means the number of lamps to be tested with the intention of determining acceptability, either of the whole production or of the batch, as related to initial readings.
3.23 rated voltage means the voltage or voltage range specified or assigned by the manufacturer.
NOTE: If for special reasons, lamps are marked with dual voltages, the ‘Rated Voltage‘ shall be taken as being the mean of the marked voltages.
3.24 rated wattage means the wattage marked on the lamp.
3.25 type means lamp which, independent of the type of cap are identical in photometric and electrical rating.
3.26 white finish means a low loss bulb finish that provides the diffusion of light .
NOTE This finish is also referred to as "soft white". The finish is usually provided by the internal coating of the envelope.
4 Selection of lamps for testing
4.1 General
This section gives details of the procedure for the selection of the quantities of lamps from a batch, and the individual lamp requirements against which they are to be tested. It states the sequence and methods of test which shall be applied to each individual lamp of the test quantities. The compliance of the batch is assessed as described in clause 6 from the numbers of lamps which, in the tests, fail to satisfy the requirements.
4.2 Samples for testing shall be selected from lamps belonging to one batch
The lamps for testing shall be selected in accordance with this standard. The inspection test quantity (ITQ) shall be selected at random as follows:
a) A batch of 1000 lamps or less:
1) If a batch is packed in 10 or less cartons, lamps shall be selected from every carton; or
2) If a batch is packed in more than 10 cartons, lamps shall be selected from at least one half of the total number of cartons, with a minimum of 10.
b) A batch of more than 1,000 lamps
If a batch consists of more than 1,000 lamps, lamps shall be selected as near as possible from one-third of the total number of cartons in the batch with a minimum of 10 cartons.
5 Test procedure
5.1 Test quantities
5.1.1 Inspection test quantity (ITQ)
A random sample of 35 lamps for the inspection test quantity (ITQ) shall be selected according to 4.2.
5.1.2 Rating test quantity (RTQ)
The rating test quantity shall be 25 lamps selected at random from the lamps of the ITQ which satisfy the individual requirements of the inspection test,
5.1.3 Life test quantity (LTQ)
The life test quantity shall be 13 lamps selected at random from the lamps of the RTQ which satisfy the individual lamp requirements of the rating test.
5.1.4 Accidentally broken lamps
Lamps which are accidentally broken during the test shall be replaced to ensure that the required number of lamps complete the test. The results obtained with the replacement lamp(s) shall be substituted for those of the broken lamp(s).
NOTE In order to avoid unnecessary delay, it is recommended that spare lamps be available during the tests.