Disclosure to Promote the Right To Information

Transcription

1 इ टरन ट म नक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. ज न1 क अ+धक र, ज 1 क अ+धक र Mazdoor Kisan Shakti Sangathan The Right to Information, The Right to Live प0र 1 क छ ड न' 5 तरफ Jawaharlal Nehru Step Out From the Old to the New IS (1989): Reactors, Part 1: General [ETD 16: Transformers]! न $ एक न' भ रत क +नम-ण Satyanarayan Gangaram Pitroda Invent a New India Using Knowledge! न एक ऐस खज न > ज कभ च0र य नहB ज सकत ह ह Bhartṛhari Nītiśatakam Knowledge is such a treasure which cannot be stolen

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4 Indian Standard REACTORS - SPECIFICATION PART 1 GENERAL ( Fivst Revision ) First Reprint APRIL 1996 IS 5553 ( Part 1 ) : 1989 UDC Q BIS 1990 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI Jurle 1990 Price Group 1

5 Transformers Sectional Committee, ETD 16 FOREWORD This Indian Standard (First Revision ) was adopted by the Bureau of Indian Standards on 22 December 1989, after the draft finalized by the Transformers Sectional Committee had been approved by the Electrotechnical Division Council. This standard was first published in This revision has been done with a view to bring it in line with the IEC Pub Reactors. In this revision the requirements for reactors have been covered in eight parts as follows: Part 1 Part 2 Part 3 Part 4 Part 5 Part 6 Part 7 Part 8 General Shunt reactors Current limiting and neutral earthing reactors Damping reactors Tuning reactor Earthing transformers ( Neutral couplers ) Arc suppression reactors Smoothing reactors. This standard (Part 1 ) has been based on IEC Pub Reactors Section 1 : General issued by the International Electrotechnical Commission. In this standard, reference have also been made to IS 2026 ( Parts I to 4 ).

6 Indian Standard REACTORS - SPECIFICATION PART 1 GENERAL ( First Revision ) 1 SCOPE 3.1 Types of Reactor IS 5553 ( Part 1) : This standard applies to the following types of reactors: a) Shunt reactors, b) Current-limiting reactors and neutralearthing reactors, c) Damping reactors, d) Tuning reactors, e) Neutral couplers, f) Arc-suppression reactors, and g) Smoothing reactors. With the exception of the follwing reactors: a) Single-phase reactors rated at less than 1 kvar and three-phase reactors rated at less than 5 kvar, and b) Special reactors Where Indian Standards do not exist for such small or special reactors, this standard may be applicable in whole or in part. 2 REFERENCES 2.1 The following Indian Standards are necessary adjuncts to this standard. IS 2026 IS x0. (Part 1) : 1977 (Part 2 ) : 1977 (Part 3): 1981 (Part 4) : 1977 IS 6600 : 1972 LS : 1983 IS : TERMINOLOGY Title Power transformers General (first revision ) Temperature-rise Insulation level and dielectric tests ( second revision) Terminal marking tappings and connections (first revision ) Guide for loading of oil immersed transformers Method of evaluating the analysis of gases in oil-filled electrical equipment in service Dry type power transformers 3.0 For the purpose of this standard the followiug definitions shall apply Shunt Reactor Reactor intended for shunt connection in a system to compensate capacitive current Current Limiting Reactor Reactor intended for series connection in a system for limiting the current under system fault conditions Neutral Earthing Reactor Single-phase reactor for connection between the neutral of a system and earth for limiting the line-to-earth current under system earth fault conditions Damping Reactor Reactor intended for series connection with capacitors for limiting the inrush current during switching Tuning or Filter Reactor Reactor intended for series or parallel connection for instance with capacitors for reducing or blocking harmonics and/or communication frequencies ( reactors line-traps ) Earthing Transformer ( Neutral Coupler ) Three-phase transformer or reactor intended for parallel connection in a system to provide a neutral. NOTE - Earthing transformers may in addition supply a local auxiliary network Arc-suppression Reactor Single-phase reactor intended for connection between the neutral of a system and earth for compensating lhe capacitive line-to-earth current due to a single-phase earth-fault Smoothing Reactor Reactor intended to reduce the flow of harmonic currents and transient current in dc systems. 4 SERVICE CONDITIONS 4.1 Normal Setvice Conditions This standard gives detailed requirements for reactors for use under the following conditions. 1

7 IS 5553 ( Part 1) : Altitude A height above sea-level not exceeding 1000 m. NOTE - For greater altitudes, see Reference Ambient Temperatures The reference ambient temperatures assumed for the purpose of this specification shall be as follows: a) Maximum ambient air temperature 50 C b) Maximum daily average ambient air temperature 40 C Maximum yearly weighted average ambient temperature 32 C Minimum ambient air temperature -5 C Water When the cooling medium is water, it is assumed that a temperature of 30 C will not be exceeded and that the average cooling water temperature will not exceed 25 C on any day Reactors complying with this specification are suitable for operation continuously, at their ratings provided the temperature of the cooling air or water does not exceed any of the reference ambient temperature specified under It is also recognized that operation of a reactor at its rated kva provides normal life expectancy, if the hot spot temperature based on maximum yearly weighted average ambient temperature is 98 C The temperature-rises of the windings, cores/magnetic shield and oil of reactors designed for operation at altitudes not exceeding those given in and with cooling medium temperatures as described in shall not exceed the limits specified in Tables 3 and 4 of IS 2026 ( Part 2 ) : 1977 for high ambient temperatures ( see 4.2 ). 4.2 Provision for Unusual Service Conditions The purchaser shall specify in his enquiry any conditions not covered by the normal service conditions specified in 4.1. Supplementary requirements, within defined limits, for the rating and testing of reactors designed for other than the normal service conditions listed in 4.1, are given below: -for air-cooled reactors of the dry and oilimmersed types for operation outside the normal temperature limits of cooling air, in 4.2 of IS 2026 ( Part 2 ) : for all types of reactors for operation at altitudes in excess of 1000 m above sealevel the provision of 4.2 and 4.3 of IS 2026 ( Part 2 ) : 1977 shall apply. Temperature conditions outside the limits covered by the supplementary requirements and specint operating conditions, for example, restricted cooling air circulation, are subject to agreement between the manufacturer and the purchaser. 2

8 Bureau of Indian Standards BIS is a statutory institution established under the Bureau ofhdicln Standm-ds Act, I986 to promote harmonious development of the activities of standardization, marking and quality certification of goods and attending to connected matters in the country. Copyright BIS has the copyright of all its publications. No part of these publications may be reproduced in any form without the prior permission in writing of BIS. This does not preclude the free use, in the course of implementing the standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating to copyright be addressed to the Director (Publications), BIS. Review of Indian Standards Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed periodically; a standard along with amendments is reaffirmed when such review indicates that no changes are needed; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of BIS Handbook and Standards Monthly Additions. This Indian Standard has been developed from Dot : No. ETD 16 ( 2761 ) Amendments Issued Since Publication Amend No. Date of Issue Text Affected BUREAU OF INDIAN STANDARDS Headquarters: Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi Telegrams : Manaksanstha Telephones : , (Common to all offices) Regional Offices : Telephone Central : Manak Bhavan, 9 Bahadur Shah Zafar Marg NEW DELHI Eastern : l/14 C. I.T. Scheme VII M, V. I. P. Road, Maniktola CALCUl-l-A { , , Northern : SC , Sector 34-A, CHANDIGARH Southern : C. I. T. Campus, IV Cross Road, MADRAS , , Western : Manakalaya, E9 MlDC, Marol, Andhcri (East) BOMBAY 4OW , , Branches : AHMADABAD. BANGALORE. BHOPAL. BHUBANESHWAR. COIMBATORE. FARIDABAD. GHAZIABAD. GUWAHATI. HYDERABAD. JAIPUR. KANPUR. LUCKNOW. PATNA. THIRUVANANTHAPURAM. Reprography Unit, BlS, New Delhi, India