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है”ह”ह

IS 5553-1 (1989): Reactors, Part 1: General [ETD 16:Transformers]

IS 5553 ( Part 1 ) : 1989

Indian Standard

REACTORS - SPECIFICATION PART 1 GENERAL

( Fivst Revision ) First Reprint APRIL 1996

UDC 621’318’43

Jurle 1990

Q BIS 1990

BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

Price Group 1

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 1970. This revision has been done with a view to bring it in line with the IEC Pub 289-1988 ‘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 289-1989 ‘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 ).

IS 5553 ( Part 1) : 1989

Indian Standard

REACTORS - SPECIFICATION PART 1 GENERAL

( First Revision ) 1 SCOPE 3.1 Types of Reactor

1.1 This standard applies to the following types of reactors:

a) Shunt reactors,

3.1.1 Shunt Reactor

b) Current-limiting reactors and neutral- earthing reactors,

c) Damping reactors,

d) Tuning reactors, e) Neutral couplers, f) Arc-suppression reactors, and

g) Smoothing reactors.

Reactor intended for shunt connection in a system to compensate capacitive current.

3.1.2 Current Limiting Reactor

Reactor intended for series connection in a system for limiting the current under system fault conditions.

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.

3.1.3 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.

3.1.4 Damping Reactor

1.1.1 Where Indian Standards do not exist for such small or special reactors, this standard may be applicable in whole or in part.

Reactor intended for series connection with capacitors for limiting the inrush current during switching.

2 REFERENCES

2.1 The following Indian Standards are necessary adjuncts to this standard.

3.1.5 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 ).

IS x0.

IS 2026

(Part 1) : 1977

(Part 2 ) : 1977

(Part 3): 1981

(Part 4) : 1977

IS 6600 : 1972

LS 10593 : 1983

IS 11171 : 1985

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 TERMINOLOGY

3.0 For the purpose of this standard the followiug definitions shall apply.

3.1.6 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.

3.1.7 Arc-suppression Reactor

Single-phase reactor intended for connection bet- ween the neutral of a system and earth for com- pensating lhe capacitive line-to-earth current due to a single-phase earth-fault.

3.1.8 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

IS 5553 ( Part 1) : 1989

4.1.1 Altitude

A height above sea-level not exceeding 1000 m.

NOTE - For greater altitudes, see 4.2.

4.1.2 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.

4.1.3 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 4.1.2.

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.

4.1.4 The temperature-rises of the windings, cores/magnetic shield and oil of reactors designed for operation at altitudes not exceeding those given in 4.1.1 and with cooling medium temper- atures as described in 4.1.2 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 con- ditions specified in 4.1.

Supplementary requirements, within defined limits, for the rating and testing of reactors designed for other than the normal service con- ditions listed in 4.1, are given below:

-for air-cooled reactors of the dry and oil- immersed types for operation outside the normal temperature limits of cooling air, in 4.2 of IS 2026 ( Part 2 ) : 1977.

-for all types of reactors for operation at altitudes in excess of 1000 m above sea- level 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

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

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60 38 43 60 20 25

1

235 02 16,235 04 42 235 15 19,235 23 15

632 92 95,632 78 58 632 78 91,632 78 92

Reprography Unit, BlS, New Delhi, India