Earth.doc

ELCO STEEL MMTE MME MIYANEH COMPLEX Steel Making Plant Project ASCOTEC

DOCUMENT TITLE

MMAH :Document No

NISCO 230/33 KV SUBSTATION DATA SHEET for EARTHING SYSTEM

.Rev

:Designer Document NO :Project Document NO

MISP1301ETS114

DATE: NOV. 2009

1-1

MWES1U43E001140011

Page: 1 of 6

C:\Documents and Settings\All Users\Documents\sub-2-9-88\88.8.30\earthing data sheet\EARTH.doc

DOCUMENT TYPE : DATA SHEET DOCUMENT TITLE :

DATA SHEET for EARTHING SYSTEM

1

NOV. 09

A.Alizadeh

M.Khosravian

A.Hemmatian

Issued For Review

Prepared Checked Approved Client Purpose of Issue CONTRACTOR This document and the information disclosed are the property of MMTE and are not to be used to furnish any information for making of documents or apparatus except where approved by written agreement. Rev.

DATE

Confidential: This document discloses proprietary information. It may not be reproduced nor disclosed any person, nor used for any purpose, except with the written .permission of MMTE

ELCO STEEL MMTE MME MIYANEH COMPLEX Steel Making Plant Project ASCOTEC

DOCUMENT TITLE

NISCO 230/33 KV SUBSTATION DATA SHEET for EARTHING SYSTEM

MMAH :Document No

:Designer Document NO :Project Document NO

.Rev

MISP1301ETS114 MWES1U43E001140011

1-1

DATE: NOV. 2009 Page: 2 of 6

C:\Documents and Settings\All Users\Documents\sub-2-9-88\88.8.30\earthing data sheet\EARTH.doc

REVISION RECORD SHEET

Note: This Table is used for External Comments

Confidential: This document discloses proprietary information. It may not be reproduced nor disclosed any person, nor used for any purpose, except with the written .permission of MMTE

ELCO STEEL MMTE MME MIYANEH COMPLEX Steel Making Plant Project ASCOTEC

DOCUMENT TITLE

NISCO 230/33 KV SUBSTATION DATA SHEET for EARTHING SYSTEM

MMAH :Document No

:Designer Document NO

.Rev

MISP1301ETS114

1-1

MWES1U43E001140011

:Project Document NO

DATE: NOV. 2009 Page: 3 of 6

C:\Documents and Settings\All Users\Documents\sub-2-9-88\88.8.30\earthing data sheet\EARTH.doc

EARTHING DATA SHEET DESCRIPTION 1

basic design data nominal voltage

1.1

design ground fault current

1.2

time duration of ground fault current

1.3

assumption for calculation of step and touch voltage : 1.3.1 step length 1.3.2 body resistance , hand to both feed and one foot to the other 1.3.3 weight (app)

1.4

fault clearing time NOTE: for design, a set of soil average resistivity measurements shall be carried out and the results shall be handed over to the contractor . the design method shall be submitted the engineer for approval .

2

switchyard grounding connectors

2.1

bolted connector : a) manufacturer b) type c) estimated number of bolted connectors which will be provided for each type d) cross sectional area

2.2

other connectors: a)manufacturer b) type c) cross sectional area

UNIT

SUPPLIER’S DATA 230 KV

KA(rms)

40

S

1

m ohm Kg

S

0 .3

mm2

mm2

Confidential: This document discloses proprietary information. It may not be reproduced nor disclosed any person, nor used for any purpose, except with the written .permission of MMTE

ELCO STEEL MMTE MME MIYANEH COMPLEX Steel Making Plant Project ASCOTEC

DOCUMENT TITLE

NISCO 230/33 KV SUBSTATION DATA SHEET for EARTHING SYSTEM

C:\Documents and Settings\All Users\Documents\sub-2-9-88\88.8.30\earthing data sheet\EARTH.doc

MMAH :Document No

.Rev

:Designer Document NO

MISP1301ETS114

DATE: NOV. 2009

1-1

MWES1U43E001140011

:Project Document NO

Page: 4 of 6

EARTHING DATA SHEET ITEM 3

DESCRIPTION

conductor

3.2

type

3.3

burial depth

3.4

manufacturer

3.5

number of mats and dimension

4

control buiding grounding cable

4.1

cross sectional area

4.2

manufacturer

4.3

number of cores

4.4

core cross sectional area

4.5

estimated length for buildings

5

control building grounding bus

5.1

manufacturer

5.2

cross sectional area

5.3

estimated length for each buildings

6.1

SUPPLIER’S DATA

Cm

50

mm2

120

switchyard grounding equipotential mats

3.1

6

UNIT

m

mm2 m

switchyard grounding cable (grid) manufacturer

m

Confidential: This document discloses proprietary information. It may not be reproduced nor disclosed any person, nor used for any purpose, except with the written .permission of MMTE

ELCO STEEL MMTE MME MIYANEH COMPLEX Steel Making Plant Project ASCOTEC

DOCUMENT TITLE

NISCO 230/33 KV SUBSTATION DATA SHEET for EARTHING SYSTEM

C:\Documents and Settings\All Users\Documents\sub-2-9-88\88.8.30\earthing data sheet\EARTH.doc

MMAH :Document No

.Rev

:Designer Document NO

MISP1301ETS114

1-1

MWES1U43E001140011

:Project Document NO

DATE: NOV. 2009 Page: 5 of 6

EARTHING DATA SHEET ITEM

DESCRIPTION

6.2

estimated length for main ground grid

6.3

cross sectional area for main grounding gird

6.4

number of cores

6.5

type

6.6

buried depth

6.7

Risers particulars : 6.7.1 manufacturer 6.7.2 cross-section area 6.7.3 number 6.7.4 type 6.7.5 total estimated length for risers

7

SUPPLIER’S DATA

Cm

mm2 m

185

Switchyard grounding rods

7.1

manufacturer

7.2

type and designation

7.3

estimated number which will be provided

7.4

material

7.5

diameter and length

8

UNIT

Cm

20

:Min. Sizes of Copper Conductor for

8.1

connection of transformers

8.2

connection of lightning arresers and other equipments

Confidential: This document discloses proprietary information. It may not be reproduced nor disclosed any person, nor used for any purpose, except with the written .permission of MMTE

ELCO STEEL MMTE MME MIYANEH COMPLEX Steel Making Plant Project ASCOTEC

DOCUMENT TITLE

NISCO 230/33 KV SUBSTATION DATA SHEET for EARTHING SYSTEM

C:\Documents and Settings\All Users\Documents\sub-2-9-88\88.8.30\earthing data sheet\EARTH.doc

MMAH :Document No

.Rev

:Designer Document NO

MISP1301ETS114

1-1

MWES1U43E001140011

:Project Document NO

DATE: NOV. 2009 Page: 6 of 6

EARTHING DATA SHEET ITEM 8.3

DESCRIPTION

UNIT

SUPPLIER’S DATA

connection of shield wire

9

max. permissible fault current density

10

max. step voltage , calculated and tolerable at the design ground fault current and 1 m step V(rms)

11

max. grid potential rise at the design ground fault current

12

max. touch voltage , calculated and tolerable at the design ground fault current

13

max. calculated ground resistance to the remote earth

14

:Temporary grounding devices

14,1

type

14.2

material

14.3

size

14.4

permitted short time current (1/3s)

14.5

dynamic current

A/mm2

KV(rms) V(rms) Ω

KA (rms) KA (peak)

Confidential: This document discloses proprietary information. It may not be reproduced nor disclosed any person, nor used for any purpose, except with the written .permission of MMTE