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Manua{ on

SUBSJATION LAYOUT Publication No. 299

Editors G.N. Mathur R.S. Chadha

ISO 9001 :2000

Central Board of Irrigation and Power New Delhi

MANUAL ON

SUBSTATION LAYOUT

Publication No. 299

Editors

G.N. Mathur R.S. Chadha

• CENTRAL BOARD OF IRRIGATION AND POWER Malcha Marg, Chanakyapuri, New Delhi 110 021

•

2006 ISBN No. 81-7336-306-4

"Reproduction of articles in publication in any form is permissible subject to proper acknowledgement and intimation to the publishers. The publishers have taken utmost care to avoid errors in che publication. However, the publishers arc in no way responsible for the authenticity of data or information given by the contributors." (ii)

EXPERTS COMMITIEE Chairman

Shri S.C. Misra Director (Projects) (Reul.) Power Grid Corporation of India Ltd. Members Shri J.B. Shah Chief Engineer (Transmission)

Shri Raj Kumar General Manager

Gujarat Electricity Board Sardar Patel Vidyut Bhawan Race Course, Vadodara-390 007

National Hydroelectric Power Corp.Ltd. Sector 33 NHPC Office Complex Faridabad (Haryana)

Shri P.B. Mehta Deputy Engineer (Transmission Deptt.) Gujarat Electricity Board Sardar Patel Vidyut Bhawan Race Course, Vadodara-390 007

Sbri M.H. Kshatriya Executive En3ineer (Transmission Depll.) Gujarat Electricity Board Sardar Patel Vidyut Bhawan Race Course, Vadodara-390 007

Sh ri M. Gopala Rao Chief Engineer (Constmclion) AP Transmission Corporation Limited Vidyut Soudha, Hyderabad-500 082

Shri H.G. Chabra Director /P&D (TS) Bhakra Beas Management Board 66 kV Sub Stn., industrial Arca l Sector 28, Chandigarh, Punjab

Shri S.K. Roy Mohapatra Deputy Direczor (SE& TD) Central Electricity Authority Scwa Bbawan, R.K. Puram New Dclhi-llO 066

Shri Vikas Sakscna General Manager Power Grid Corporation of India Ltd Sector 29, Plot 2, Saudamini Near IFFCO Chowk Gurgaon, Haryana

Shri M.M. Goswami Deputy General Manager (Engg. SIS) Power Grid Corporation of India Ltd Sector 29, Plot 2, Saudamini Near IFFCO Chowk Gurgaon, Haryana

Shri B.N. Saini S11perie111ending Engineer (400 kV Design) Rajasthan Rajya Vidyut Prasaran Nigam Ltd Vidyut Bhawan, Janpalh Jaipur

Shri K.S. Kattigchallimatt Chief Engineer (Reul.) Kamataka Power Transmission Corpn Ltd

Shri R. P. Lal

Shri M.K. Chowdhury Superientending Engineer (E) CP & ED

Executive Director (O&M) National Hydroelectric Power Corp.Ltd. Sector 33, NHPC Office Complex Faridabad (Haryana)

West Bengal State Electricity Board Vidyut Bhawan, Bidhannagar Block - DJ, Sector 11 Kolkata-700 091 (iti)

Shri P.R. Ganage Chief Engineer (Transmission Pla1111ing) Maharashtra State Electricity Board S"' floor, Prakashganga, E Block Plot No. C 19, Kurla Complex Bandra (E}, Mumbai-400 OS 1 Shri K.K. Shah (Alternate) Executive Engineer Design Maharashtra State Electricity Board Maharashtra State Electricity Board S"' Floor, Prakashganga, E Block Plot No. C 19, Kurla Complex Bandrn (E), Mumbai-400 OS I Shri S.K. Jain Deputy Director (T&S - If) Punjab State Electricity Board Patiala-147 001 Shri S. Ayyadurai Chief Engineer (Personnel) Tamil Nadu Electricity Board 800, Anna Salai, Chcnnai-600 002

Late Shri A.K. Kapur Fonner Executive Director Power Grid, Corporation of India Ltd. A - SS, East of Kai lash New Delhi -110 06S Shri Salish Nayar Addi. General Manager (TBEM) Integrated Office Complex Bharat Heavy Electricals Limited Lodi Road, New Dclhi-110 003 Shri Raman Gulathi Group Manager (Engg.) Alstom T&D Systems Limited A 21-24, Sector 16 Noida Shri E.V. Rao Head (Engg.) KEC International Limited B 190, MIDC Industrial Area Butibori - 441 .l08 Nagpur District

(iv)

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2- MINIMUM CLEARANCES: A

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BETWEEN PHASE TO EARTH 3500MM SECTONAL CLEARENCE 6500MM VERTICAL DISTANCE BETWEEN LOWEST 2550MM PART OF THE INSULATOR AND PLINTH LEVEL

3- THE PARAMETERS FOR WHICH THE SY?TEM IS DESIGNED ARE:

a) SYSTEM VOLTAGE 420kV (RMS)

400KV

b) UGHTN!NG IMPULSE WITHSTAND VOLTAGE : ±1550kVP

(DRY &

WET) c) SWITCHING IMPULSE WITHSTAND VOLTAGE : +1050kVP (DRY & WET) · d) POWER FREQUENCY WITHSTAND VOLTAGE : 630kV(rms) . (DRY & WET) · . e) MINIMUM CREEPAGE DISTANCE : 25MM/kV(10500mm) f) MAXIMUM FAULT LEVEL : 40kA/1 Sec_

B

B

4- LINE TRAP POSITIONS SHOWN IN THE LAYOUT ARE INDICATIVE ONLY, FINAL LOCA TlON Will BE DECIOED BASED ON PLCC REQUIREMENT.

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