Quick Calculator

Building Services Electrical Design Support - Overview / Help

CAPACITOR BANK PANEL BOARD CABLE TRAY BUS BAR

CABLES CONVERT

INDEX KVAR PANEL TRAY BUSBAR LIGHT CABLES

Q.CALS

UNDER CONSTRUCTION

MECHANICAL

Building Services_Electrical Design Support

HELP

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BUS BAR LIGHTING

CABLES

CONV. Q.CALS MECH.

MAY

I

HELP

YOU

MECHANICAL

HELP

Building Services_Electrical Design Support

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BS_EDS V.Prathi

CAPACITOR BANK_kVAR RATING CALCULATION PF

###PROJECT NAME: DATE: ###CAPACITOR PANEL REF: PREPARED BY: ###PROJECT NO: PAGE NO: ###

###

Ref.No Normal Power factor (p.f) Required kVAR Selected kVAR ###

1 900 0.85 0.9 121.882 500 0.7 0.9 267.94

###3 900 0.5 0.8 883.85 ###4 #N/A ###5 #N/A ###6 #N/A ###7 #N/A

###8 #N/A ###9 #N/A ###

######

Grand Total #N/A

######

Formulae #########

Where as,

###P - Power in watts Comments ###

Approved ###

Date ######

######

Load in Kilowatts (Kw)

Improving Power factor (p.f)

tanØ1

kVAR = P x ( tanØ1 - tanØ2)

tanØ1 = tan(cos-1 p.f)

tanØ2 = tan(cos-1 p.f)

BS_EDS V.Prathi

PANEL BOARD _ SIZING CALCULATION

HEIGHT 1900 PROJECT NAME: DATE:

WIDTH 2000 PANEL REF: PREPARED BY: PROJECT NO: PAGE NO: HEIGHT

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###

###

1900

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###

######

Chk Avl Ht 300 Chk Avl Ht 300 250 300 300 250 300 ###2000 ###

Comments

Approved

Date

CABLE TRAY _ SIZE CALCULATION

PROJECT NAME: DATE:CABLE TRAY REF: PREPARED BY:PROJECT NO: PAGE NO:

Cable Type Cable Overall Layer1Size in Sq.mm Diameter in mm Nos. Width

XLPE/SWA/PVC2 Core 6mm 15.9 4 64

10mm 18 6 108

16mm 20 -

25mm 24.3 -

35mm 27.9 -

4 Core 6mm 18.7 -

10mm 21.1 -

16mm 22.9 -

25mm 29.1 -

35mm 32.1 -

50mm 32 -

70mm 37.7 -

95mm 41.7 1 42

120mm 47.1 5 236

150mm 51.4 -

185mm 56.6 -

240mm 63 1 63

300mm 68.8 -

Single Core 6491B (LSF)10mm 6.8 -

16mm 8 -

25mm 9.8 -

35mm 11 -

50mm 13 -

70mm 15 -

-

MICC/PVC Heavy Duty2 core 1.5mm (2H1.5) 9.6 -

2.5mm (2H2.5) 10.4 -

4mm (2H4) 11.5 -

6mm (2H6) 12.6 -

10mm (2H10) 14.4 -

4 core 2.5mm (4H2.5) 11.8 -

4mm (4H4) 13.1 -

6mm (4H6) 14.4 -

10mm (4H10) 16.5 -

16mm (4h16) 19.6 -

25mm (4h25) 22.9 -

Total Number of Cables 17Cable width required 640 on 1 layers

Number of layers 1 Comments

Tolerance 25% Approved

Selected cable tray size in mm 700 Date

BS_EDS V.Prathi

BUS BAR _ VOLTAGE DROP CALCULATION

CONSTANTSCos Ø: 0.90 PROJECT NAME: Raffles city Tower 1 DATE: 10.07.08

Sin Ø: 0.44 PART : From 25 to 17 PREPARED BY: PV KARAKTERISTIK EMPEDANSLARI

Diversitiy: 0.80 BUSBAR NO: B3 PAGE NO: 1

Utility Voltage(V) 415 PROJECT NO: 2006069

OUTLET NO

25TH FLOOR 3.50 70 87 KBC-II 1600 (Cu) 0.02550 0.03360 0.02 0.00 ###

24TH FLOOR 3.50 60 161 KBC-II 1600 (Cu) 0.02550 0.03360 0.04 0.01 ###

23TH FLOOR 3.50 60 235 KBC-II 1600 (Cu) 0.02550 0.03360 0.05 0.01 ###

22TH FLOOR 3.50 75 328 KBC-II 1600 (Cu) 0.02550 0.03360 0.07 0.02 ###

21TH FLOOR 3.50 75 420 KBC-II 1600 (Cu) 0.02550 0.03360 0.10 0.02 ###

20TH FLOOR 3.50 70 507 KBC-II 1600 (Cu) 0.02550 0.03360 0.12 0.03 ###

19TH FLOOR 3.50 75 600 KBC-II 1600 (Cu) 0.02550 0.03360 0.14 0.03 ###

18TH FLOOR 3.50 70 686 KBC-II 1600 (Cu) 0.02550 0.03360 0.16 0.04 ###

17TH FLOOR 104.00 70 773 KBC-II 1600 (Cu) 0.02550 0.03360 5.23 1.26 ###

0 KBC-II 1600 (Cu) 0.02550 0.03360 0.00 0.00 ###

0 KBC-II 1600 (Cu) 0.02550 0.03360 0.00 0.00 ###

0 KBC-II 1600 (Cu) 0.02550 0.03360 0.00 0.00 ###

0 KBC-II 1600 (Cu) 0.02550 0.03360 0.00 0.00 ###

0 KBC-II 1600 (Cu) 0.02550 0.03360 0.00 0.00 ###

0 KBC-II 1600 (Cu) 0.02550 0.03360 0.00 0.00 ###

0 KBC-II 1600 (Cu) 0.02550 0.03360 0.00 0.00 ###

0 KBC-II 1600 (Cu) 0.02550 0.03360 0.00 0.00 ###

0 KBC-II 1600 (Cu) 0.02550 0.03360 0.00 0.00 ###

0 KBC-II 1600 (Cu) 0.02550 0.03360 0.00 0.00 ###

0 KBC-II 1600 (Cu) 0.02550 0.03360 0.00 0.00 ###

###

###

###

###

###

TOTAL : 132.00 625 5.92 1.43 ###

COMMENTS : As the voltage drop percentage is lower then 4% , the selected busbar current is correct. Result: ###

VOLTAGE DROP%E = 1.43 ###

###

###

Formulae ###

###

###

Where as, ###

ΔV = Voltage Drop (V) R = Resistance (mΩ/m) ###

Comments ###

L = Line Length (m) Cos Ø = Load Factor Approved ###

I = Line Current (A) Note: a constant is on amperic value Date ###

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BUSBAR

LENGTH ( m )

POWER ( kW )

LINE CURRENT

( A )

BUSBAR ()

RESISTANCE

( mohm /m )

REACTANCE

( mohm /m )

VOLTAGE DROP ( Vd )

VOLTAGE DROP %E

ΔV = α√3.L.I(R.Cos Ø + X1.Sin Ø) 10 ¯³ [V]

α = Load Distribution Constant X1 = Inductive Reactance (mΩ/m)

LIGHTING _ CALCULATION

PROJECT NAME: DATE:BLOCK REF: PREPARED BY: ###PROJECT NO: PAGE NO: ###

###Room Ref. Room Data Illumination Data

Lumens O/P No.of Fittings Req.###

Length Width Height Lux Req Wattage of Lamps AreaKitchen 5 4 2.8 200 18 1500 7142.8571 5 ###Dining 4 4 4 200 8 950 8113.5903 9 ###Majlis 4 4 3 150 13 1200 4524.8869 4 ###

15 1300 0.0000 0 ###18 1500 0.0000 0 ###26 2000 0.0000 0 ###30 2650 0.0000 0 ###40 3000 0.0000 0 ###50 4800 0.0000 0 ###70 5800 0.0000 0 ###80 7350 0.0000 0 ###90 8000 0.0000 0 ###

#########

Total Lumens O/P (Required) 19781.3343 ###Total Number of Fittings (Required) 18 ###

###Formulae ###Lumens O/P = Lux(Req.) x Area / M.F x U.F ###

###Where as, ###

M.F = Maintenance Factor Comments ###

U.F = Utilisation Factor Approved ###

R.I = Area x (Length x Breadth) / Height x (Length + Breadth) Date ############

Lumens / Fitting

CABLE SELECTION CURRENT RATING_VOLTAGE DROP_PROTECTIVE CONDUCTOR

PROJECT NAME: DATE:BLOCK REF: PREPARED BY: PROJECT NO: PAGE NO:

Distribution Board ReferenceCircuit NumberType

2Type of CableType of Protective Device

2

Correction Factors: Ca - Ambient Temp 3

Ci - Thermal Insulation 4Cp - Protection Device 5

0.033333333333

Groups of Circuits (other than BS3036 fuses)

5

n

1.4686047800550.122383731671

Maximum Permissable Voltage DropLength of Run (metres) 88

81.408

Phase Conductor Resistance ohms/mResistance R1 ohms 44Maximum Disconnection Time 0.4s or 5sMaximum Zs ohmsCPC constant "K" (BS7671)CPC ohms/mResistance R2 ohms 8Ze 9

6122

Is Actual Zs Maximum Zs ? If NO, recalculateIf = Uo/Actual ZsTime t from Appendix 3 (BS7671) sec. 8I = 2k = 3

3.265986323711Actual Size of CPC

Comments

Approved

Date

Design Current Ib

Protective Device Rating In

Single Circuit Current Rating In/Ca x Ci x Cp = It

Number of circuits (where Ib > 0.3 x Cg x Ib)

Group Rating Factor "Cg" =(from table 4B1, 4B2, 4B3)

Are Circuits Liable to Simultaneous Overload? Y/N

Minimum Conductor Rating = Largest It/Ca x Ci =

Cable size chosen mm2

mV/A/m Parameter of CableActual Voltage Drop: (Ib x L x mV/A/m) /1000 V

Actual Zs ohms (Radial) Zs = Ze + R1 + R2Actual Zs ohms (Ring) Zs = Ze + 0.25(R1 + R2)

Minimum Size of CPC mm2

Actual Size Acceptable? Y/N

If NO increase CPC size to mm2

¿

It≥

Electrical Conversion P.F Power Length

1000 0.8 1 5

1250 1.0139 8800.00359

Volume Energy Kinematic Viscosity Dynamic Viscosity

1 13650 1 1

35.314662471 4.000420515 0.000001 0.000671969

Molar Flowrate Mass Mass Flowrate Heat Flux

1 1 1 1

0.3786675 2239.969112 0.007559873 3.154591

Volumetric Flowrate Density Heat Transfer Coefficient Specific Energy

490 1 1 1

288.40296368 0.01601846 0.000567826 2326

Pressure Area Thermal Conductivity Specific Heat

14.5 1 1 1

0.999739765 10.76391042 0.01730735 4186.8

Areawise Electrical load requirements.

Project Type: Required Power Load in Kilowatts 41400Cooling Strategy Power Factor (P.F) 0.8Total Area in Sq.m 450000 Required Power Load in KVA 51750

Voltage Drop,Current Ratings of XLPE Multi Core Cables

Length in mtrs Total Voltage Drop (Vd) in Volts

35 75 6.5625Total Voltage Drop in % 1.6006

Voltage Drop,Current Ratings of PVC Multi Core Cables

Length in mtrs Total Voltage Drop (Vd) in Volts

25 120 12

Total Voltage Drop in % 2.9268

Under Construction

Connected Load in Amps (A)

Cable Size in Sq.mm

Connected Load in Amps (A)

Cable Size in Sq.mm

Generators, Switchgears, Protective Devices, ELV Solutions, Earthing, Lightning Protection, Aircraft Warnings , IP's, Standards , Codes & Advance Technology Updates


36

59

47

Approximate No. of 1.5MVA Transformer's Required

Max.Current Carrying Capacity of the Selected

cable in Amps (A)

Max.Current Carrying Capacity of the Selected

cable in Amps (A)

Generators, Switchgears, Protective Devices, ELV Solutions, Earthing, Lightning Protection, Aircraft Warnings , IP's, Standards , Codes & Advance Technology Updates

CABLES CONV. Q.CALS MECH. HELP

Electric Power Conversion for Mechanical loads in Building Services

Fans Pumps

Volumetric flow Volumetric flow

21500

Static Pressure in millimeters 60 Head in Meters

Power Required in Kilowatts 28.67 Power Required in Kilowatts


Pumps

Volumetric flow

650

40

104.18


InstructionsYou may move from worksheet to worksheet by clicking on the blue buttons located at the top of each worksheet or the blue tabs at the bottom of this workbook.

Enter data in only the white cells with gray borders: Use the drop down boxes to select the standard values

Create a quick and easy result for the required KVAR rating for the capacitor panel by filling out the white cells on the "Capacitor bank_kVAR calculation" Sheet. As in the calculation format fill the connected load in kilowatts ,initial Power factor (P.F) and correction Power Factor .We will get the requiredKVAR rating of the capacitor panel for individual sections as well Bulk. Either select the exact value or select the next available rating in the market.(Comply with local regulations.)

Use this "Panel sizing calculation sheet" to get the size of the LV panel's. Use drop down box at the Top left of the format to select the height of the Panel.Use the drop down boxes in the format to get the standard ratings of the incomers & Outgoings. Select the breaker ratings by using the drop down boxes in the compartments, Note that the down side dimensions should not be "Check availabilty Height".In such a case, Either replace the Low RatedProtective Device instead of high rated Protective device or remove (select empty ----------- indicates no compartment) any of the Protective device / Compartment in that particular column.

In this sheet there are two formats for the cable tray selection whereas first format will gives the exact width with our customised tolerance (ie as per our local regulations) and the second format will be considered as the international standard with having the expand space factor / Groupings having 50% more for the security reasons notified by the NFPA standards & it should be mainly considered in industrial projects as well as in highrise buildings.

distance & connected loads at every tapoff can be fill by rows. The Diversity factor applied by us in the white cell is considered in the line current.

Line current, By selecting the higher size will gives the good result if the voltege drop must not exceeds the limit.

Uses this “Lighting_ Calculation” to find the total lumens O/P & number of fittings required for an area by our recommended lux level & type of fittingin watts and also fill the inputs such as length, Width & height of the area in the white cells with grey borders.

KVAR (Capacitor bank)

Panel

Tray

BusbarUses this "Busbar_ Voltage drop calculation" sheet to select the Copper busbar ratings . The constant values are common for the calculation. Floor levels,

Select the available standard ratings of bus bars by using the drop down boxes. "Increase (A) rating" indicates that the selected Busbar rating the

Light


81


In this sheet there are two format for Cable schedule. You can customize your format for the cable schedule as per your standard format.

Enter the value in white cells with grey borders & select the units by using drop down boxes for Unit conversions.

Ampere Transformer's required by filling total area of the project in Square meter, Also select the Type of project,Infra and fill the available power factor.

"Quick Cals" sheet. Enter the "Amps rating,length of cable" in the white cell.Select the "Standard Cable Size"by using the drop down menu provided

can't carry the connected load, for solution Select the next size cable.

Cable

Conv.

Q.Cals.Area wise Electrical Load requirements: As per CIBSE rule of thumb we can determine the Approximate electrical load & Max. Number 1.5Mega Watt

Voltage drop.Current ratings of Multicore XLPE & PVC Cables : Create a quick and easy selection of cable by filling out the white cells on the

in the cell. The Total Voltage drop & Percentage of Votage Drop (Vd) are calculated for you. "Increase cable size for CCC"

######

######

Create a quick and easy result for the required KVAR rating for the capacitor panel by filling out the white cells on the "Capacitor bank_kVAR calculation" ###Sheet. As in the calculation format fill the connected load in kilowatts ,initial Power factor (P.F) and correction Power Factor .We will get the required ###KVAR rating of the capacitor panel for individual sections as well Bulk. Either select the exact value or select the next available rating in the market. ###

#########

Use this "Panel sizing calculation sheet" to get the size of the LV panel's. Use drop down box at the Top left of the format to select the height of the Panel. ###Use the drop down boxes in the format to get the standard ratings of the incomers & Outgoings. Select the breaker ratings by using the drop down ###boxes in the compartments, Note that the down side dimensions should not be "Check availabilty Height".In such a case, Either replace the Low Rated ###Protective Device instead of high rated Protective device or remove (select empty ----------- indicates no compartment) any of the Protective device ###

###

###In this sheet there are two formats for the cable tray selection whereas first format will gives the exact width with our customised tolerance (ie as per ###our local regulations) and the second format will be considered as the international standard with having the expand space factor / Groupings having 50% more for the security reasons notified by the NFPA standards & it should be mainly considered in industrial projects as well as in highrise buildings.

distance & connected loads at every tapoff can be fill by rows. The Diversity factor applied by us in the white cell is considered in the line current.

Line current, By selecting the higher size will gives the good result if the voltege drop must not exceeds the limit.

Uses this “Lighting_ Calculation” to find the total lumens O/P & number of fittings required for an area by our recommended lux level & type of fittingin watts and also fill the inputs such as length, Width & height of the area in the white cells with grey borders.

busbar ratings . The constant values are common for the calculation. Floor levels,

"Increase (A) rating" indicates that the selected Busbar rating the



In this sheet there are two format for Cable schedule. You can customize your format for the cable schedule as per your standard format.

Enter the value in white cells with grey borders & select the units by using drop down boxes for Unit conversions.

Ampere Transformer's required by filling total area of the project in Square meter, Also select the Type of project,Infra and fill the available power factor.

"Quick Cals" sheet. Enter the "Amps rating,length of cable" in the white cell.Select the "Standard Cable Size"by using the drop down menu provided

By V.Pradeesh (2007-08)

As per CIBSE rule of thumb we can determine the Approximate electrical load & Max. Number 1.5Mega Watt

Create a quick and easy selection of cable by filling out the white cells on the

in the cell. The Total Voltage drop & Percentage of Votage Drop (Vd) are calculated for you. "Increase cable size for CCC" indicates the selected cable

Quick Calculator

Documents

chk avl ht

current carrying

correction

check availabilty

comments approved

standard cable

increase cable

grey borders