Embed Size (px)
Citation preview
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.
इंटरनेट मानक
“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda
“Invent a New India Using Knowledge”
“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru
“Step Out From the Old to the New”
“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan
“The Right to Information, The Right to Live”
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”
“Invent a New India Using Knowledge”
है”ह”ह
IS 9921-5 (1985): Alternating Current Disconnectors(Isolators) and Earthing Switches for Voltages Above 1 000v, Part 5: Information to be Given with Tenders, Enquiriesand Orders [ETD 8: High Voltage Switchgear and Controlgear]
IS : 9921 ( Part 5 ) - 1985 . . .
Indian Standard
SPECIFICATION FOR ALTERNATING CURRENT DISCONNECTORS
( ISOLATORS ) AND EARTHING SWITCHES FOR VOLTAGES ABOVE 1000 V
PART 5 INFORMATION TO BE GIVEN WITH TENDERS, ENQUIRIES AND ORDERS
( Second Reprint DECEMBER 11-)97 )
UDC 621.316.545.025:621.3.027.6
BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 1 lOOU2
Cl-2 May. 1.986
-._
L”*
IS : 9921 ( Part 5 ) .. 1985
Indian Standurd
SPECIFICATION FOR ALTERNATING CURRENT DISCONNECTORS
(ISOLATORS ) AND EARTHING SWITCHES FOR VOLTAGES ABOVE 1000 V
PART 5 INFORMATION TO BE GIVEN WITH TENDERS, ENQUIRIES AND ORDERS
High Voltage Switchgear and Controlgear Sectional Committee, ETDC 58
Chairman
SH~I H. M. PA1 Members
Reprcsen!ing
The Ahmedabad Electricity Co Ltd. Ahmadabati
SHEI M. B. BAH~~L~~AB ( Alfernafe to Shri H. M. Pai j
Tata Hydro-Electric Power Supply C;O Ltd. Uombav
SMT C. BALIGA ( ALtern& )
CJXIEB ,hWIN,U!.X~ ( hEC ) I I Central Public Works Department, New Delhi Snav~uon OB Wonl;s III ( Alternate 1
DIRECTOR Central Power Research Institute, Bangalorc JOINT DIRECTOLS, STD ( .4lfcrnute I ) SR. DY DII~E~TOR ( A~ternatc 11 )
DIRECTOR, SUB-STATION Central Electricity Authority, New Delhi DEPUTY DIR%:(:TOII, SUR-STATION
( Alternate ) SFIRI G. L. DUA Rurad IIZiectrification Corporation Ltd, N,aw
e SHRI S. C. KIIIJ~EANA ( nlfcrnat~ )
Snnr B. V. ESWAIL ASEA Ltd, Nasik SRRI S. SIJBIZAMANI~N ( Alternate )
Sam K. L. Galto Directorate General of Supplies 2nd Disposals, New Delhi
SHUI R. V. NAI~AYANAN ( Alternate )
( Continued on page 2 )
Q Copyright 1385
BUREAU OF INDIAN STANDARDS This publication is protected under the Zt&rr Copyright Act ( XlV of 1957 ) and I
I reproduction in whole or in part by any means except with written permission of the publisher shall be deemed to be an infriqement of copyright under the said Act.
i
IS : 9921 ( Part 5 ) - 1985
( Continued from pugs 1 )
Members
SHRI T. K. GHOSE
Represeking
Calcutta Electric Supply Corporation Ltd, Calcutta
SHRI G. CHATTERJEE ( Altcrnarc ) SHHI B. N. GHOSH Bharat Heavy Electricals Ltd, Hyderabad
SHHI V. RA~HAVAN ( Alternate ) SHRI Y. R. GODSE Bombay Electric Supply and Transport Under-
taking, Bombay SHRX D. SWAMINATHAN ( Alternate )
SHRI JAYANT N. GURJAR Kirloskar ASEA Limited, Bangalore SHI~I P. D. JA~IAQIR~AH Smr JAV~ED AHMED
Maharashtra State Electricity Board, Bombay NGEF Limited, Bangalore
SHUI K. P. SARATHY ( Alternate ) SERI P. M. JOVEPH Aluminium Industries Limited, Kundara
SHRI C. M. A. NAYAR ( AItcrnnte ) JOINT DIRECTOR National Test House, Calcutta
Saur P. C. PRADHAN ( Alternate ) SHRI B. N. KISHORE Crompton Greaves Ltd, Bombay
SHRI A. N. VENUOOPAL ( Alternate ) SHRI V. S. MANI Hindustan Brown Boveri Ltd, Bombay
&IRI S. R. POTNIS ( Alternate ) SEW S. G. MENON Tata Consulting Engineers, Bombay
SHI~I C. S. KUXAR ( Altcrnatc ) SHRI B. S. NARASIMHAN Mysore Electrical Industries, Bangalore
SEHI K. SATYANA~AYANA SHARMA ( Alternate )
SHRI J. S. NE~I Jyoti Limited, Vadodara SHRI V. B. DESAI ( Alternate )
SHRI S. G. NENE Siemens India Ltd, Bombay SHRI H. D. TUN~ARE ( Alfcrnatc )
SHRI A. S. PINTO Delhi Electric Supply Undertaking, New Delhi SHRI 0. P. ANAND ( Alternate )
SHRI T. E. B. SAIUUEL Tamil Nadu Electricity Board, Madras SHRI T. S~EYBAHARAJAN (Ahnote )
REPRESENTATIVE Indian Institute of Technology, New Delhi RXPRESENTATIVE Research, Design & Standards Organization,
Lucknow SHRI S. P. SACHDEV, Director General, IS1 ( Ex-O&&J Member )
Director ( Elec tech )
SHRI K. GANESH Deputy Director ( Elec tech ), IS1
2
IS : 9921 ( Part 5 ) - 1985
Indian Standard
SPECIFICATION FOR
ALTERNATING CURRENT DISCONNECTORS (ISOLATORS ) AND EARTHING SWlTCHES
FOR VOLTAGES ABOVE 1000 V
PART 5 INFORMATION TO BE GIVEN WITH TENDERS, ENQUIRIES AND ORDERS
0. FOREWORD
0.1 This Indian Standard ( Part 5 ) was adopted by the Indian Standards Institution on 2 1 February 1985, after the draft finalized by the High Voltage Switchgear and Controlgear Sectional Committee had been approved by, the Electrotechnical Division Council.
0.2 With the large scale manufacture of air-break disconnectors in India, ‘the need for specifying uniform requirements of such equipment was felt, particularly in view of different practices being followed by the manufac- turers who have tie-ups with different overseas manufacturers. This standard was originally prepared as IS : 1818-1972* to meet this need and to provide guidance to the new manufacturers in this field.
0.3 The first revision of IS : 1818-I972* was done in 1972 mainIy to take into account the developments at the international level and for expanding the scope to cover ratings up to 420 kV. However, in the last few years in the field of high voltage switchgear, there has been considerable advancement in knowhow on the performance of the equipment which calls for stipulations that should be precisely made in the national standards. This standard [ IS : 9921 ( Part 5 ) J has been formulated to take these developments into account.
0.4 This standardhas been brought out in the following five parts:
Part 1 General and Definitions
Part 2 Rating
Part 3 Design and Construction -
*Alternating current isolators ( disconnectors ) and earthing switches (first revision ).
3
.
I$ : 9921 ( Part 5 ) - 1985
-
I
I’,;ri ,t Type Tests _trr(! Routine Tests
l’;,r t 5 Inlc)rmation to LK Given with ‘I’endc~ i lG_kics and Orders.
:iil the par-ts shall be read in conjunction with one another.
‘I’his standard ( Part 5 ) summerizes the information required to be i’ 1 $‘?.‘I I > ujth tt:rders~ enquiries and orders and partly replaces IS : ;!Il,j_i!i72*. All the parts in the series together will replace IS : 1818, c:~nr;)l::tcly.
0.5 While preparing this standard, assistance has been derived from IEC Pub 129-1975 c Altrrnating current disconnectors ( isolators ) and earthing switches ’ published by the International Electrotechnical Commission. This standard ( Part 5 ) conforms appreciably to this IEC: Pub and there ;rre no major deviations.
0,6 For the purpose of decidin g whether a particular requirement of this staxldard is complied with the final value, observed or calculated, expressing the result of a test. shall be rounded off in accordance with I S . 2-I %Ot. Thr number of significant places retained in the rounded off ztluc ~;hould be the same as that of the specified value in this standard.
1. SCOPE
1.1 This standard ( Part 5 ) covers particulars that should be supplied by the enquirer while enquiring for or ordering equipment and the technical particulars that should be given by the manufacturers with tenders.
1.2 Equipment falling under the scope of this standard are intended for system voltages above 1 000 V ac.
1.3 For detailed scope of this series of standards on disconnectors alrd earthing switches, see 1 of Part 1 of this standard.
2. INFORMATION TO BE GIVEN WITH ENQUIRIES AND ORDERS
2.1 When enquiring for or ordering a disconnector or earthing switch, the following particulars should be supplied by the enquirer:
a) Particuiars of system, that is, nominal and highest voltages, frequency, number of phases and details of neutral earthing.
*Nternating cltrrrnt isolators ( disconnectors ) and earthing switches ( jrd revision ). TRulcs for rounding off numerical values ( reuiscd ).
4
b)
c)
IS : 9921 ( Part 5 ) - 1985
Service conditions ( see 2 of Part 1 of this standard ) including minimum and maximum ambient air temperatures, the latter, if greater than the normal values; altitude if over 1 000 m; and any special conditions likely to exist or arise, for example, unusual exposure to steam or vapour, moisture, fumes, explosive gases, excessive dust or salt air.
Characteristics of a disconnector or earthing switch. The following information should be given:
1) 2) 3) 4)
5)
6)
7)
8)
9)
Number of poles;
Class: indoor or outdoor;
Rated voltage;
Rated insulation level where a choice exists between different insulation levels corresponding to a minimum given rated voltage or, if other than standard, desired insulation level;
Rated frequency;
Rated normal current ( for disconnectors only );
Rated short-time withstand current;
Rated short-circuit-making current, if any ( for earthing switches only );
If other than standard, specified value of duration of short- circuit;
10) 11)
12)
13)
Mechanical terminals load;
Mounting conditions and connections on the disconnector and earthing switch;
The type tests specified under special request ( artificial pollution and radio interference ); and
For disconnectors of rated voltage > 420 kV, Class A or Class B switching surge requirements.
d) Characteristics of the operating mechanism and associated equip- ment, in particular, the following:
1) Method of operation, whether manual or power;
2) Number and type of spare auxiliary switches;
3) Rated supply voltage and rated supply frequency; and
4) Requirements concerning the use of compressed gas.
IS : 9921 ( Part 5 ) - 1985
No,w; - The enquirer should give information of any special conditions n’>t included above that might influence the tender or the order.
3. INFORMATION TO BE GIVEN WITH TENDERS
3.1 When the equirer requests technical particulars of a disconnector or
earthing switch, the following information, where applicable, shall be given by the manufacturer ‘with the descriptive matter and drawings:
a) Rated values and characteristics
1) Number of poles;
2) Class: indoor or outdoor;
3) Rated voltage;
4) Rated insulation level;
5) Rated frequency;
6) Rated normal current ( for disconnectors only );
7) Rated short-time withstand currents;
8) Rated short-circuit-making current ( for earthing switches only );
9) The type tests specifirtl under special request ( artificial pollu- tion and radio interference ); and
IO) For disconnectors of rated voltage > 420 kV, Class A or Class B switching surge requirements.
b) Type tests - Certificate or report on request.
c) Constructional features
1) Mass of complete disconnector or earthing switch;
2) Pressure and limits of pressure between which the disconnector or earthing switch will operate correctly ( operated by pneu- matic or hydraulic device );
3) Minimum clearances in air:
i) between poles,
ii) to earth,
iii) for isolating distance ( for disconnectors only ); and
4) For divided frame assembles, how to achieve and adjust the isolating distance or gap.
r
6
IS : 9921 ( Part 5 ) - 1985
d) Operating mechanism of a disconnector or earthing switch and associated equipment
1) Type of operating mechanism;
2) Rated supply voltage and/or pressure of operating mechanism;
3) Current required at rated supply voltage to operate the disconnector or earthing switch;
4) Quantity of free gas required to operate the disconnector or earthing switch at the rated supply pressure;
5) Number and type of auxiliary contacts;
6) Design of the device or description of means for securing the position; and
7) Design of indicating device.
e) Overall dimensions and other information - The manufacturer should give the necessary.information as regards the overall dimensions of the disconnector or earthing switch in the open and closed positions and details necessary for the design of the foundation. General information regarding maintenance should also be given.
4. NAMEPLATES
4.1 Disconnectors, earthing switches and their operating devices shall be provided with a nameplate which contains the illformation in accordance with Table 1. For outdoor disconnectors or earthing switches, the name- plate shall be weather-proof and corrosion-proof.
If a disconnector or earthing switch consists of several independent poles, each pole shall be provided with a nameplate.
4.2 For a combined operating device and disconnector or earthing switch, it may be sufficient to use only one combined nameplate for both parts. The same applies to combined disconnectors and earthing switches.
The nameplate shall be visible in the position of normal service and installation.
IS : 9921 ( Part 5 ) - 1985
TABLE 1 INFORMATION ON NAMEPLATES
( Ckluse 4.1 )
ABBRE- UNIT DISCON- EARTH- OPERA-
VIATION NECTolt INQ TINO SWITCH DEVICE
Manufacturer X X X - __.___ Designation of type X X X ~ ..- --- Serial number [XI (X)
Rated voltage
__- Un kV X X
Rated lightning impulse withstand 27, voltage
kV (X)*
Rated switching impulse withstand Us voltage and the Class ( A or B ) of the equipment, for rated voltages 300 kV and above
kV X
Rated normal current In A X
Rated short-time withstand current zth kA X
Rated short-circuit making current Ith kA
Value of short-time if different from 1 t s (X) second
Rated pressure of compressed gas P N/m8 (X)
Rated auxiliary voltage us V
Rated mechanical terminal load F N (X)
Mass ( including liquid ) m kg (X)
NOTE - The word ‘rated’ need not appear on the nameplate. --.
X = The marking of these values is mandatory,
(X) = The marking of these values is optional,
*Mandatory for Un > 72’5 kV
W”
X
X
(Xl
(Xl
(Xl W)
w (X) w
8
BUREAU OF INDIAN STANDARDS
Headquarters Manak Bhavan, 9 Bahadur Shah Zafar Marg, NEW DELHI 110002 Telephones: 323 0131, 323 3375,323 9402 Fax : 91 11 3234062, 91 11 3239399, 91 11 3239382
Central Laboratory :
Plot No. 20/9, Site IV, Sahibabad Industrial Area, Sahibabad 201010
Regional Offices:
Telegrams : Manaksanstha (Common to all Offices)
Telephone
8-77 00 32
Central : Manak Bhavan, 9 Bahadur Shah Zafar Marg, NEW DELHI 110002 32376 17
*Eastern : 1 /I 4 CIT Scheme VII M, V.I.P. Road, Maniktola, CALCUTTA 700054 337 86 62
Northern : SC0 335-336, Sector 34-A, CHANDIGARH 160022 60 38 43
Southern : C.I.T. Campus, IV Cross Road, CHENNAI 600113 235 23 15
IWestern : Manakalaya, E9, Behind Marol Telephone Exchange, Andheri (East), 832 92 95 MUMBAI 400093
Branch Offices::
‘Pushpak’, Nurmohamed Shaikh iMarg, Khanpur, AHMEDABAD 380001 550 13 48
SPeenya Industrial Area, 1 st Stage, Bangalore-Tumkur Road, BANGALORE 560058
839 49 55
Gangotri Complex, 5th Floor, Bhadbhada Road, T.T. Nagar, BHOPAL 462003 55 40 21
Plot No. 62-63, Unit VI, Ganga Nagar, BHUBANESHWAR 751001 40 36 27
Kalaikathir Buildings, 670 Avinashi Road, COIMBATORE 641037 21 01 41
Plot No. 43, Sector 16 A, Mathura Road, FARIDABAD 121001 8-28 88 01
Savitri Complex, 116 G.T. Road, GHAZIABAD 201001 8-71 19 96
5315 Ward No.29, R.G. Barua Road, 5th By-lane, GUWAHATI 781003 54 11 37
5-8-56C, L.N. Gupta Marg, Nampally Station Road, HYDERABAD 500001 201083
E-52, Chitaranjan Marg, C-Scheme, JAIPUR 302001 37 29 25
117/418 B, Sarvodaya Nagar, KANPUR 208005 21 68 76
Seth Bhawan, 2nd Floor, Behind Leela Cinema, Naval Kishore Road, 23 89 23 LUCKNOW 226001
NIT Building, Second Floor, Gokulpat Market, NAGPUR 440010 52 51 71
Patliputra Industrial Estate, PATNA 8OOOi3 26 23 05
Institution of Engineers (India) Building 1332 Shivaji Nagar, PUNE 411005 32 36 35
T.C. No. 14/l 421, University P. 0. Palayam, THIRUVANANTHAPURAM 695034 621 17
‘Sales Office is at 5 Chowringhee Approach, P.O. Princep Street, CALCUTTA 700072
TSales Office is at Novelty Chambers, Grant Road, MUMBAI 400007
$Sales Office is at ‘F’ Block, Unity Building, Narashimaraja Square, BANGALORE 560002
271085
309 65 28
222 39 71
-. Printed at Dee Kay Pnnters. New Delhi- I IoOl.S, Indta.
