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CUSTOMERPO. NO.PROJECT TITLE

BP SK KJ 10.08.11 DOC.NO. C-1230-0811-14846PREPARED BY. CHECKED BY. APPROVED. BY. DATE REV. 00 SHEET. NO. 1 OF 3

DESIGN CALCULATION FOR 415V, 2700A NSPB.

DESIGN CALCULATION

C&S Electric Ltd.

JINDAL INDIA POWER LIMITED

RATING :- 415V, 2700A NSPB

B-1, SITE-IV, SURAJPUR INDL. AREA, KASNA ROAD, GREATER NOIDA

BUSDUCT DIVISION

JINDAL INDIA POWER LTD

GAUTAM BUDH NAGAR (UP)

LOI No. PROJ/PUR/BUSDUCT/JINDAL/49 dt.31.5.11M/S KIRLOSKAR BROTHERS LIMITED

C & S ELECTRIC LIMITED

CUSTOMER : M/S KIRLOSKAR BROTHERS LIMITED PO. NO. : LOI No. PROJ/PUR/BUSDUCT/JINDAL/49 dt.31.5.11PROJECT : JINDAL INDIA POWER LTDC&S DOC. NO. : C-1230-0811-14846 REV. : 00 DATED 10.08.11BHEL NO. :-

SL No.

Description Data Data Unit REMARKS

Table- 1 2700A

1 Enclosure Width WE = 850 mm Ref STD Drawings

2 Enclosure Height HE = 450 mm Ref STD Drawings

3 Enclosure Sheet Thk TE = 3 mm Ref STD Drawings

4 Enclosure Material = Al Alloy Ref STD Drawings

5 Design Ambient Temp Tamb = 50 0C Ref Technical data Sheet

6 Maximum allowable Temp. for Busbar Talo = 40 0C Ref Technical data Sheet

7 Busbar configration (Conventional / interleved) Interleaved

8 Short Circuit Current (rms) Symmetrical for each busbarISC = 50 KA Ref Technical data Sheet

9 Peak Short circuit Current ISCP = 105.0 KA Ref Technical data Sheet

10 Duration of Fault T = 1 Seconds Ref Technical data Sheet

11 Phase spacing S = 115 mm Ref STD Drawings

12 Initial Temperature of busbar θ1 = 90 0C Tamb +Talo

13 Final Temperature θ2 = 260 0C As per IEEE C37.23.

14 Adapted Insulator span LA = 1 M Adapted / Assumed

15 Busbar Chosen per phase Flat = 2 Nos Ref STD Drawings

16 Busbar Chosen Neutral Flat = 1 Nos Ref STD Drawings

17 Width of busbar WBB = 152.4 mm Ref Technical data Sheet

18 Thickness of Busbar TBB = 9.53 mm Ref Technical data Sheet

19 Actual Cross sectional Area of Busbar ABB = 2905 Sq. mm For Flat Edge

20 Rating of Busduct required IReq = 2700 Amp Ref Technical data Sheet

21 Open Air rating of busbar for 500 Rise over400 ambient in still but unconfined air for

IOA = 4240 Amp Ref Indal book

A

I Min. Cross Section Area of Conductor Amin = ISCeTIo2.17x104e{log10[(θ2+258)/(θ1+258)]}p = 5.544 Sq. cm

= 554.4 Sq. mm

II Actual cross sectional Area of Busbar = 2905 Sq. mm Ref. Table No. 1 sl. No. 19

III Hence the busbar size chosen is safe forShort time rating

Yes

Refer :- Aluminum Busbar Handbook (Indal)

B

I Peak electromagnetic force along the centerline of Busbar without Enclosure

FM = Mx2.05x(ISCP)2x10-8xdxk/S (Refer NGK Insulator Catalogue)

Where Multiplying Factor M = 0.866

II ISCP for Interleaved Busbar ISCP = 52.5 KA

Steady state Factor d = 0.375

Shape correction Factor k = 0.88

Therefore FM = 140.41 Kg/m

SUPPORT INSULATOR SPAN CALCULATION UNDER SHORT CIRCUIT

Design calculation for Non Segregated Phase Busduct (415V) 2700A

Legends

Table- 2

SHORT TIME THERMAL WITHSTAND CAPABILITY OF BUSBAR

of 3

C & S ELECTRIC LIMITED

CUSTOMER : M/S KIRLOSKAR BROTHERS LIMITED PO. NO. : LOI No. PROJ/PUR/BUSDUCT/JINDAL/49 dt.31.5.11PROJECT : JINDAL INDIA POWER LTDC&S DOC. NO. : C-1230-0811-14846 REV. : 00 DATED 10.08.11BHEL NO. :-

SL No.

Description Data Data Unit REMARKS

Design calculation for Non Segregated Phase Busduct (415V) 2700A

Legends

III Limiting the Max Fiber stress of Al Busbar FS = FMXL2x100/10xZ Kg/m

IV Maximum Allowable Insulator Span L = eo(FSx10xZ) / (FMx100)p Limiting the Max Fiber stress of Al Busbar FS = 1056 Kg/cm2 AL BUSBAR HAND BOOK

Section Modulus Z = 2.31 CM3

Therefore L = 1.32 m

V Average span adopted LA = 1.00 m REF TABLE-1

VI Hence adapted insulator span is Safe Yes

C

(Temperature Rise Calculation)

I Derating / Uprating Factor

a Temperature Rise Correction factor a = 0.880 For dig C over dig C Ambient

CSA of Busbar / Total CSA of Enclosure = 2.658 %

b Enclosure Correction Factor b = 0.809 Ref Indal Al Busbar Handbook

Phase Spacing / busbar width

Cross-Sectional Area of Busbar / Total Cross-Sectional Area of Enclosure

= 12.067

c Proximity Effect factor c = 1.00 Ref Indal Al Busbar Handbook

Phase Spacing / Busbar Thk. 12.00

d Painting Factor d = 1.2 Ref Indal Al Busbar Handbook

e Enclosure material factor (for Al=1, MS=0.85) e = 1

II Combined correction Factor Fc = = axbxcxdxe

Therefore Fc = = 0.8538

III Rating of busbar after applying combined = 3620 Amp

IV Rating of Busduct required = 2700 Amp

V Calculated Temperature Rise = 24.3 0C

VI Hence busbar size chosen is adequate Yes

BUSBAR SELECTION FOR CONTINUOUS CURRENT RATING

of 3

CUSTOMER ;-M/S KIRLOSKAR BROTHERS LIMITEDPO.NO. :- LOI No. PROJ/PUR/BUSDUCT/JINDAL/49 dt.31.5.11PROJECT :-JINDAL INDIA POWER LTDDOC NO. :- C-1230-0811-14845SHEET 2 OF 5 REV - 00

C&S ELECTRIC. Ltd.

SL. NO. DESCRIPTION 415V, 2700A

1.0

1.1 Manufacture of Busduct

1.2 Service

1.3 Cooling System

1.4 Type of Busduct

1.5 System Nominal Voltage

1.6 Rated Voltage Class

1.7 Continuous Current Rating 2700A

1.8 Frequency

1.9 Reference Standard

1.10 No. of Phase

1.11 Short Time Current rating for 1 Sec. withstand

1.12 Dynamic Current Rating

1.13 Temp. Rise (over an ambient of 50ºC) while carrying rated continuous current (Max.)

a) Busbar

b) Enclosure

1.14 Average Weight of Busduct per meter (Approx) 95 Kgs.

1.15 Degree of Protection

1.16 1 Minute Dry Power Frequency withstand voltage

2.0

2.1 Material/Grade

2.2 Shape

2.3 Size (mm) per Phase 2700A-2-152.4X9.53/PH & 1-152.4X9.53/N

GENERAL-BUSDUCT

BUSBAR / CONDUCTOR

IS: 8623

Non-Segregated Phase

415V

1.1KV

50 Hz

TECHNICAL DATA SHEET

C&S ELECTRIC Ltd.

Indoor/Outdoor

Air Natural

Triple Pole & Neutral

50 KA (rms)

105 KA (peak)

40°C

20°C

2.5 KV (rms)

IP - 55

AL. ALLOY. GR-63401 WP

Rectangular Bar


C&S ELECTRIC. Ltd.



2.4 Cross Sectional Area of busbar 2700A = 2905 SQ.mm/PH & 1452 SQ.mm/N

2.5 Configuration 2700A = R Y B N R Y B (Interleaved Arrgt.)

2.6 Busbar Finishing

2.7 Busbar Connection hardware material

2.8 Busbar Connection Hardware Size

2.9 Recommended Bolt Torque for Busbar Joints

3.0

3.1 Material Aluminium

3.3 Shape

3.4 Size of Enclosure (mm) 850 x 450

3.5 Thickness of Enclosure 3 mm

3.6

a) Interior

b) Exterior

3.7 Material of Gasket

3.8 Flange joint Hardware Material

3.9 Flange Joint Hardware Size

4.0

4.1 Material Aluminium

4.2 Size

4.3 Thickness 3mm

4.4 Location / Position Top / Bottom

ENCLOSURE

Painting

ACCESS DOOR / INSPECTION COVER

Matt Black

HTS electro zinc passivated

MS electro zinc passivated

M10 Bolt + 1N + 2PW + 1SW

Matt Black

RAL-7032

M12 Bolt + 1N + 2PW + 1SW

5.5 Kg - mtr.

Outdoor slopping top/ indoor without Sloping Top

EPDM

As per requirement


C&S ELECTRIC. Ltd.



4.5 Type of Flange Joints

4.6 Cover joint Hardware Material

4.7 Cover Joint Hardware Size

5.0

5.1 Type

5.2 Material

5.3

a) Nominal Voltage

b) Highest Voltage

5.4 Number of Support per Location

5.5 Average Span 1m

5.6 Size of SMC SUPPORT 70x70

5.7 Minimum Creepage Distance

6.0

6.1 Type

6.2 Material

6.3

a) Nominal Voltage

b) Highest Voltage

6.4 Minimum Creepage Distance

6.5 Weight per Sealing Plate (Appx.) 6 Kg

SUPPORTING INSULATOR

With EPDM Gasket

Voltage Class

SEAL OFF PLATE

MS electro zinc passivated

M8x35+N+2PW+1SW

Indoor/Outdoor

Two

25 mm

SMC

415 V

650 V

25 mm

INDOOR

FRP

415 V

Voltage Class

650 V


C&S ELECTRIC. Ltd.



7.0

7.1 Phase to Phase

7.2 Phase to Earth

8.0

8.1 Material/Grade

8.2 Shape

8.3 Size

9.0

9.1 Type Indoor

9.2 Power 60 W

9.3 Voltage 240 V

9.4 Phase Single

9.5 Thermostat 30-110°C

9.6 Degree of Protection For Marshalling Box IP-55

BP SK KJPREPARED BY CHECKED BY APPROVED BY

Space Heater

MINIMUM CLEARANCE

Flat

50x10

25.4mm

25 mm

AL. ALLOY. GR-63401 WP

GROUNDING CONDUCTOR

GAUTAM BUDH NAGAR (UP)B-1, SITE-IV, SURAJPUR INDL. AREA, KASNA ROAD, GREATER NOIDA

BUSDUCT DIVISIONe l e c t r i c

P.O No LOI No. PROJ/PUR/BUSDUCT/JINDAL/49 dt.31.5.11

TITLE:

PROJECT: JINDAL INDIA POWER LTD

M/S KIRLOSKAR BROTHERS LIMITED

GENERAL ARRANGEMENT OF 415V, 2700A, TPN, NSPB


MANUFACTURER

CUSTOMER

COVER SHEET

SL./NO. DRG. NUMBER DRAWING. TITLESHEET




NOS.REV.NO.

NAME OF ITEMITEM No. DESCRIPTION MATL.GRADE/TYPE

TYP. CROSS SECTIONAL VIEW OF 415V, 2700A NSPB.





No.ITEM

ITEM DESCRIPTIONNAME OF

MATL. QTY.

GENERAL NOTES:-

PLAN~~~~

ELEVATION~~~~~~~~



CROSS - SECTIONAL VIEW OF ENCLOSURE

DETAIL-`X' (TYP.)

VIEW-XX'

ELEVATION

FIXING DETAIL OF ENCLOSURE FLANGE

DETAIL-`A'

FOR INDOOR



VIEW-XX'

ELEVATION

FIXING DETAIL OF ENCLOSURE FLANGE

DETAIL-`A'

FOR OUTDOOR



LEFT S

IDE VIEW

ELE

VA

TION

2

GR

AD

EQ

TY.

MA

TER

IAL

SL. N

O.

DE

SC

RIP

TION

LEFT S

IDE VIEW

BILL O

F MA

TER

IALS

GA

UTA

M B

UD

H N

AG

AR

(U.P

.)B

US

DU

CT D

IVIS

ION

B-1, S

ITE-IV

, SU

RA

JPU

R IN

DL. A

RE

A, K

AS

NA

RO

AD

, GR

EA

TER

NO

IDA

SH

. NO

. 08 OF 10

REV.

APP

D.

REV

. NO

.D

ES

CR

IPTION

e l e

c t r i c

DETAIL-`A' DETAIL-`Z'

ELEVATION

PLAN

SIDE VIEW

GAUTAM BUDH NAGAR (UP)



GAUTAM BUDH NAGAR (UP)BUSDUCT DIVISION


e l e c t r i c

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