BUREAU OF INDIAN STANDARDS

Transcription

1 Manak Bhavan, 9 Bahadur Shah Zafar Marg New Delhi Phones Extn 8284 TeleFax Website : eetd@bis.org.in व य पक पररच लन स द प रल ख प र षण स ज ञ पन स दर ददन क ईट ड 31/ ट तकन क सम तत ईट 31 प र षत : 1. ईट ड 31 क सभ सदस य 2. व द य त तकन क व भ ग पर षद क सभ सदस य तथ 3. र च खन ल अन य सभ ननक य मह दय, क प य ननम नलल खखत मस द क एक प रनत स लग न ह : प रल ख श षषक ईट ड 31 (13574) ननमन ल टत ब जल आप नतष उपक ण, ददष ट ध उत प दन ननष प दन व श षत ए क प य इस मस द क अ ल कन क औ अपन सममनतय यह त त ह ए भ ज कक अ तत यदद य म नक क र प म प रक लशत ह ज ए त इस प अमल क न म आपक व य स य अथ क म क य कद न इय आ सकत ह सममनतय भ जन क अ नतम त ख : सममनतय यदद क ई ह त क प य अगल प ष प ददए प र म अध हस त क षर क उपर ललखखत पत प भ ज द यदद क ई सममनत प र पत नह ह त अथ सममनत म क ल भ ष स ध र दट ह ई त उप क त प रल ख क यथ त अ नतम र प ददय ज एग यदद क ई सममनत तकन क प रक नत क ह ई त व षय सलमनत क अध यक षर क प मशष स अथ उनक इच छ प आग क क यष ह क ललए व षय सलमनत क भ ज ज न क द प रल ख क अ नतम र प द ददय ज एग 1 धन य द भ द य, (र ज व श ) प रम ख (ईट ड ) ईम ल eetd@bis.org.in स लगन: उप क त

2 Manak Bhavan, 9 Bahadur Shah Zafar Marg New Delhi Phones Extn 8284 TeleFax Website : eetd@bis.org.in DRAFTS IN WIDE CIRCULATION DOCUMENT DESPATCH ADVICE Reference Date ETD 31/T TECHNICAL COMMITTEE ETD ADDRESSED TO: 1. All Members of ETD All Members of Electrotechnical Division Council; and 3. All other Interested. Dear Sir(s), Please find enclosed a copy of the following draft Indian Standard: Doc No. ETD 31 (13574) Title Low-voltage power supply devices, d.c. output - Performance characteristics Kindly examine the draft standards and forward your views stating any difficulties which you are likely to experience in your business or profession, if these are finally adopted as Indian Standards. Comments, if any, may please be made in the format given overleaf and mailed to the undersigned. Last date for comments: In case no comments are received or comments received are of editorial nature, you will kindly permit us to presume your approval for the above documents as finalized. However, in case of comments of technical in nature are received then it may be finalized either in consultation with the Chairman, Sectional Committee or referred to the Sectional Committee for further necessary action, if so desired by the Chairman, Sectional Committee. Thanking you, Yours faithfully (Rajeev Sharma) Head (Electrotechnical) eetd@bis.org.in Encl : See attachment.

3 Manak Bhavan, 9 Bahadur Shah Zafar Marg New Delhi Phones Extn 8284 TeleFax Website : eetd@bis.org.in Date Document No Doc: ETD 31 (13574) Sl. No. Name of the Organization Clause/ Sub-Clause Paragraph/ Figure/Table Type of Comment (General/Editorial /Technical) Comments Proposed Change

4 For BIS Use Only DRAFT FOR COMMENTS ONLY (Not to be reproduced without the permission of BIS or used as a STANDARD) Last date of receipt of comments is: Draft Indian Standard Low-voltage power supply devices, d.c. output - Performance characteristics Power Electronics Sectional Committee, ETD 31 NATIONAL FOREWORD This Indian Standard which is identical with IEC : 1993+AMD 1 : 2001 Low-voltage power supply devices, d.c. output - Performance characteristics issued by the International Electrotechnical Commission (IEC) would be adopted by the Bureau of Indian Standards on the recommendation of the Power Electronics Sectional Committee and approval of the Electrotechnical Division Council. The text of the IEC Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following: a) Wherever the words International Standard appear referring to this standard, they should be read as Indian Standard. b) Comma (,) has been used as a decimal marker, while in Indian Standards the current practice is to use a point (.) as the decimal marker. In this adopted standard, reference appears to International Standards for which Indian Standards also exists. The corresponding Indian Standards, which are to be substituted, are listed below along with their degree of equivalence for the editions indicated: International Standard Corresponding Indian Standard Degree of Equivalence IEC : 1990, IS 9000 (Part 2/Sec 1 to 4) : 1977, Identical with IEC Environmental testing - Part 2 : Basic Environmental testing Publication : Tests - Tests A : Cold procedure for electronic and 1974 IEC : 1974, Environmental testing - Part 2 : Tests - Tests B : Dry heat IEC : 1974, Stabilized 1 : Terms and definitions electrical items : Part 2 Cold test Basic environmental testing procedures for electronic and electrical items Part III dry heat test Section 1 General IS 7204 (Part 1) : 1974, Stabilized 1 : Terms and definitions equivalent

5 IEC : 1986, Stabilized 2 : Rating and performance IEC : 1989, Stabilized 3 : Reference levels and measurement of conducted electromagnetic interference (EMI) IEC : 1976, Stabilized 4 : Tests other than radiofrequency interference IEC : 1987, Classification of environmental conditions - Part 3 : Classification of groups of environmental parameters and their severities. Storage IEC : 1985, Classification of environmental conditions ñ Part 3: Classification of groups of environmental parameters and their severities. Transport IS 7204 (Part 2) : 1980, Stabilized 2 : Rating and performance IS 7204 (Part 3) : 1980, Stabilized 3 : Radio Frequency Interference test. IS 7204 (Part 4) : 1980, Stabilized 4 : Tests other than radiofrequency interference IS (Part 3/Sec 1) Classification of environmental conditions - Part 3 : Classification of groups of environmental parameters and their severities. Storage IS (Part 3/Sec 2), Classification of environmental conditions - Part 3 : Classification of groups of environmental parameters and their severities. Transport Document No. 22E ( Central Office ) 4 Pub : 1975 Publication : 1976 Pub : : 1976 Identical Identical The technical committee has reviewed the provisions of the following international standards referred in this adopted standard and decided that they are acceptable for use in conjunction with this standard. International Standard Title IEC : 1983 IEC standard voltages IEC : 1969 Environmental testing - Part 2: Tests - Test Ca : Damp heat, steady state IEC : 1982 Environmental testing - Part 2 : Tests - Test Fc and guidance: Vibration (sinusoidal) IEC : 1987 Environmental testing - Part 2 : Tests - Test Ea and Guidance: Shock IEC : 1987 Environmental testing - Part 2 : Tests - Test Eb and Guidance: Bump IEC : 1993 Stabilized 5 : Measurement of the magnetic component of the reactive near field IEC : 1979 Sound level meters IEC : 1992 Insulation co-ordination for equipment within low-voltage systems - Part 1 : Principles, requirements and tests IEC : 1988 Electromagnetic compatibility for industrial-process measurement and control equipment - Part 4 : Electrical fast transient/burst requirements

6 IEC : 1991 MIL-HDBK-217E : 1974 Safety of information technology equipment, including electrical business equipment Reliability prediction of electronic equipment Only English language text has been retained while adopting it in this Indian Standard, and as such the page numbers given here are not the same as in the International Standard. For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated expressing the result of a test, shall be rounded off in accordance with IS 2 : 1960 Rules for rounding off numerical values (revised). The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard. Note: The technical content of the document is not available on website. For details, please refer the corresponding IEC : 1993+AMD 1 : 2001 or kindly contact: Head Electrotechnical Department Bureau of Indian Standards 9, B.S. Zafar Marg, New Delhi eetd@bis.org.in Telephone/ fax: