aluminium busbar sizing software output

DOCUMENT : NON-ISOLATED PHASE ALUMINIUM BUSBAR SYSTEM DESIGN Date:27/02/201

JP TECHNOSOFTAHMEDABAD

27603538Ph: [email protected]:

Grade of Busbar D 50

415.00

100.00

INPUT DATA:

PROJECT :OMELECTRICAL

Altitude

Duration of Fault

40.00

AL

1.00

85.00

Sec

Fault Current 1600.0 kA

Busbar size

Busbar Enclosure Depth

185.00

100.00

300.00

Indoor with ventilated

101.6 X 9.53

600.00

Mtr.

V = =Nominal Voltage Volts

Min. Continuous Operating Voltage = VoltsVmin =

System Frequency =f =

Total Busbar width per Phase =

bt

=

Total Busbar Height per Phase ==

Busbar Interleaving

==

No. of Busbar/Phase =N =

Busbar Insulating Material ==

Ambient Temprature

Final Temprature of Busbar

=

=

=

=

30.00

100.00

600.00

2.00

PVC

Allowed Final Temp. at end of fault =

=Busbar Material

Busbar Enclosure Height =

=

=

=

=

=

=

=

=

Ta

Tf

Tend

BBmat

H

mm=D

= =

Alti = =

Panel Installation Place =

=

== Withou

Busbar Spacing (c/c Ph-Ph) = 130.00

Distance Between Bus(Within Phase) = 10.00

Ssupport Busbar Support Interval

Busbar Length =Lbb = 4.20

Min. Shearing Strenght of Al. =SH =2

kG/cm2

kG/cm2

kG/cm2

kG/cm2

kG/cm2

kG/cm2

kG/cm1500.0

50.00

Sheet No:1 Revision:R0

S =

Sb =

/3 Developed By : www.jptechnosoft.com

Isc

tf

=BBsize

at

Temp. Coefficient of Resi. at 20 / == .00403

Hz

mm

mmxmm

mm

mm

mm

mm

mm

Mtr.

O<20

BBgrade

BBinsul

BBil

1600.0A = =Electrical Load (3-phase, A.C.) Amp.

0.80PF = =Operating Power Factor

Panel ID:TSL

oC

oC

oC

oC

4" x 3/8" inch




CALCULATION :

\k*(1 + * Tf)*tO<20

(t) * 100Conductor AreaRequired = sqmm625.58=

Derating factor for Grade of Aluminium 1.000D3 = =


Derating due to Altitude

0.945D1 = =Derating factor due to Ambient Temp.

1.000D2 = =

/3 Developed By : www.jptechnosoft.com

[A] MINIMUM BUSBAR AREA REQUIRED:

Isc*

[B] CURRENT CARRYING CAPACITY CALCULATION:

Derating factor due to size of Enclosure 0.775D4 = =

Derating factor due to Proximity Effect 0.990D6 = =

Derating due Skin Effect 1.000D5 = =

Derating factor due to Black Paint 1.000D7 = =

Derating factor due to frequency variation 1.000D8 = =

Overall Derating Factor 0.725=

Actual Current carrying capacity of Busbars 1798.127= Amp.

Actual Current Density of Busbars 0.929= Amp./Sq.mm.

29.690Rdc(20) = =Rdc at 20 Deg. Cen.

[C] VOLTAGE DROP CALCULATION:

Micro-Ohm/Mtr.

.01873Rdc(Tf) = =Rdc at Final Temp. of Busbar Micro-Ohm/Mtr.

0.000Rac = = Micro-Ohm/kM/Ph

0.110L = =Busbar Inductance (Fig. 28.24, Ref. 1) Micro-Ohm/kM/Ph

Vd = Voltage drop for Busbar 0.739= Volts

Yvd = Voltage drop for Middle Bus 0.000= Volts

0.309=

(Table 28.3,Ref.1)

(Table 30.6,Ref.1)

(Table 28.6,Ref.1)

(Table 7,Ref.2)

0-

%Vdiff = Voltage Imbalance

Temp. Rise of Bus at time of fault=0-(t)

Busbar Material Constant=k

= 100.00oC

= 1.1660

[D] SHORT CIRCUIT WITHSTAND SUITABILITY:

Force on each Busbar Fm = 1745.087 KG=16 * Isc * k1 * 10

S

2 -4

Where,

k1 = Space factor for rectangular busbar (Fig. 28.7, Ref. 1)

S = c/c spacing between two phases

Sheet No:1 Revision:R0Panel ID:TSL

Current Carrying Capacity Margin 198.127= Amp.

Rdc * Skin Effect ratio

Where,

(Fig.28.13(a), Ref.1)




Remark:


Temperature at the time of fault

40.954

=

=

Isc * t\3.41*10 * BBarea4

/3

kg/sq.cm.

Bending stress on the Busbar at time of fault =

266.090=

Developed By : www.jptechnosoft.com

Fm * Ssupport

12 * M * N

Where,

M = Section Modulus of each Busbar

N = No. of Busbar per phase

Antilog

2

*(Ta+233)

References:

(1) "Electrical Power Engineering, Reference & Applications Handbook"- by Mr. K C Agarwal

(2) "Aluminium Busbar - A comprehensive Handbook" - By Thomas & Rata

Busbar Configuration:

oC

Sheet No:1 Revision:R0Panel ID:TSL

CONCLUSION :Volt. Drop in Middle Phase = 0.00 Volt1.

Busbar Support Interval Is Suitable2.

Busbar Ampere Capacity Is Suitable3.

4.

[E] TEMPERATURE AT TIME OF FAULT :

aluminium busbar sizing software output

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