Rev. Date Prepared Checked Release Rev detail

The Employer

Ministry of Energy and Water

Kabul, Afghanistan

The Engineer

Fichtner GmbH & Co KG

The Contractor

Consortium Agreement

Afghan Electrical Power Corporation

Kabul, Afghanistan

Gammon India Ltd. Mumbai, India

Name Sign Connecting Northern Towns Programme

Lot 4 - 20 and 0.4kV Distribution Network Marmol Checked SAL

Released File name:

rev. 00

Prepared RNS/PS

Scale Document No.

00 17.10.2014 RNS/PS SAL

Date: 17.10.2014 Afghanistan North East Power System

n. of sh. 09 NEP-MM-EL 65283454-09-00

CALCULATION FOR VOLTAGE DROP &CURRENT MV CIRCUIT

m.chauhanTypewritten textSheet 01

m.chauhanTypewritten text Size A4/A3

CALCULATION FOR

VOLTAGE DROP & CURRENT (MV CIRCUIT)

m.chauhanTypewritten textPage 2 of 9

Considered Receiving End Voltage at Marmot (Feeder F1 and Feeder F2) from Mazar-e-sharif = 20 kV

Size of Conductor from Mazer - E - sarifto Marmol feeder Network-1 & feeder network-2

Size of Conductor for Mamol distributionsystemIncomer Network-1Incomer Network-2

Incomer Network-1Transformer Details

Estimated Voltage Drop Calculation - 20 kV LINE _ MARMOL

Frequency of system = 50 Hz

Major Inputs for Calculation

ACSR , 120/20 Sqmm

Reference Drawing No. NEP-MM-EL 65283432 OHL LAYOUT R-02

Number of Incomers from Mazar-e-sharif = 2 Nos.

ACSR , 70/12 SqmmACSR , 70/12 Sqmm

The Incomer 1 feeds the Power to residential area through Transformer No. 1 & 2Transformer No. 1 : 100 KVATransformer No. 2 : 250 KVA

Transformer No. 3 : 250 KVATransformer No. 4 : 250 KVA

Transformer No. 5 : 250 KVA

Transformer No. 6 : 100 KVA

Transformer No. 7 : 250 KVA

Transformer No. 8 : 100 KVA

Incomer Network-2 The Incomer 2 feeds the Power to residential area through Transformer No. 3 to 8 .Transformer Details

m.chauhanTypewritten textPage 3 of 9

Conductor From

FeederDetails %age Voltage Drop

current in eachfeeder (Amp) %age Voltage Drop

current in eachfeeder (Amp) %age Voltage Drop

current in eachfeeder (Amp)

Incomer - 1 F1 0.0499 10.10 0.0496 10.1036 0.0494 10.10

F1 F2 0.0604 2.89 0.0600 2.8882 0.0598 2.89

F1 F3 0.074 7.22 0.0736 7.2205 0.0733 7.22

350 kVA

10.10 Amp.

290.00 Amp.

Hence conductor selected is in order.

Total load on incomer -1

Maximum Current at incomer -1

Current Rating of ACSR 70/12 Conductor

Summary Sheetfor

Calculation of Voltage Drop and Current in Each Feeder

Incomer-1

Incomer-1Feeding power to transformer

No. 1 & 2 .

To

Feeder Details

Triangular configuration for

ACSR conductor

Horizontal configuration (Pin Type)

forACSR conductor

Horizontal configuration(Tension type) forACSR conductor

%age Voltage Drop and current in Each Feeder

Note:1. Since there are nos. of arrangement to be used for conductor arrangements , considering the above results voltage drops at worst conditions are also within permissible level w.r.t referencevoltage 20 kV at incoming Feeders.2. Short ckt Rating and current carrying capacity of conductor is given in Document No. NEP-MM-EL-65283427-08-00.3. Refer Annexure-I

m.chauhanTypewritten textPage 4 of 9

Conductor From

FeederDetails %age Voltage Drop

current in eachfeeder (Amp) %age Voltage Drop

current in eachfeeder (Amp) %age Voltage Drop

current in eachfeeder (Amp)

Incomer-2 F4 0.0106 34.64 0.0105 34.6410 0.0105 34.64

F4 F5 0.0403 14.44 0.0400 14.4353 0.0399 14.44

F5 F6 0.0550 7.22 0.0546 7.2198 0.0545 7.22

F4 F7 0.0149 20.21 0.0148 20.2094 0.0148 20.21

F7 F8 0.0579 12.99 0.0575 12.9923 0.0573 12.99

F8 F9 0.0650 2.89 0.0645 2.8884 0.0643 2.89

F8 F10 0.0933 10.11 0.0927 10.1094 0.0924 10.11

F10 F11 0.0967 7.22 0.0961 7.2236 0.0958 7.22

1200 kVA

34.64 Amp.

290.00 Amp.

Summary Sheetfor

Voltage drop Calculation and Current in Each feeder

Incomer-2Feeder Details %age Voltage Drop and current in Each Feeder

To Triangular configuration forACSR conductor

Horizontal configuration (Pin Type)

forACSR conductor

Horizontal configuration(Tension type) forACSR conductor

Maximum Current at incomer -2

Current Rating of ACSR 70/12 Conductor

Hence conductor selected is in order.

Total load on incomer -2

Incomer-2 feeding powerto transformer 3 to 8 Nos.

Note:1. Since there are nos. of arrangement to be used for conductor arrangements , considering the above results voltage drops at worst conditions are also within permissible level w.r.t referencevoltage 20 kV at incoming Feeders.2. Short ckt Rating and current carrying capacity of conductor is given in Document No. NEP-MM-EL-65283427-08-00.3. Refer Annexure-I

m.chauhanTypewritten textPage 5 of 9

Conductor From

unit

Incomer-1 F1F1 F2F1 F3

Incomer-2 F4F4 F5F5 F6F4 F7F7 F8F8 F9F8 F10

F10 F11Input DataSource Voltage kV 20.0000 19.9900 19.9900 20.0000 19.9979 19.9919 19.9979 19.9970 19.9884 19.9884 19.9813Receiving End Voltage kV 19.9900 19.9879 19.9852 19.9979 19.9919 19.9890 19.9970 19.9884 19.9870 19.9813 19.9807

Load in KVA kVA 350 100 250 1200 500 250 700 450 100 350 250Current (I) Amp. 10.10 2.89 7.22 34.64 14.44 7.22 20.21 12.99 2.89 10.11 7.22Conductor Type 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSRD (Dia. of Conductor) mm 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7R (Radius of Conductor) mm 5.85 5.85 5.85 5.85 5.85 5.85 5.85 5.85 5.85 5.85 5.85L (Length of Conductor) kM 1.051 0.778 0.712 0.065 0.438 0.434 0.046 0.704 0.52 0.746 0.1Resistance at 20C Ohm/Km 0.4132 0.4132 0.4132 0.4132 0.4132 0.4132 0.4132 0.4132 0.4132 0.4132 0.4132

Spacing B/W ConductorDab Mtr 1.006 1.006 1.006 1.006 1.006 1.006 1.006 1.006 1.006 1.006 1.006Dbc Mtr 1.006 1.006 1.006 1.006 1.006 1.006 1.006 1.006 1.006 1.006 1.006Dca Mtr 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8Deq(GMD) GeometricMean Distance (Deq) Mtr 1.221301308 1.221301308 1.221301308 1.221301308 1.221301308 1.221301308 1.221301308 1.221301308 1.221301308 1.221301308 1.221301308

Inductance of Line H/Km 0.00112 0.00112 0.00112 0.00112 0.00112 0.00112 0.00112 0.00112 0.00112 0.00112 0.00112Inductive reactance of Line Ohm/Km 0.35131 0.35131 0.35131 0.35131 0.35131 0.35131 0.35131 0.35131 0.35131 0.35131 0.35131

Impedance (Z) Ohm 0.54236 0.54236 0.54236 0.54236 0.54236 0.54236 0.54236 0.54236 0.54236 0.54236 0.54236

Voltage Drop (Vd) V 9.98 2.11 4.83 2.12 5.94 2.94 0.87 8.59 1.41 7.08 0.68

Receiving End Voltage kV 19.9900 19.9879 19.9852 19.9979 19.9919 19.9890 19.9970 19.9884 19.9870 19.9813 19.9807

Current (I) Amp. 10.10 2.89 7.22 34.64 14.44 7.22 20.21 12.99 2.89 10.11 7.22

Percentage of Voltage Drop wrt Source Voltage20kV

%Vd 0.0499 0.0604 0.0740 0.0106 0.0403 0.0550 0.0149 0.0579 0.0650 0.0933 0.0967

Voltage Drop at Incomer Network-1 feedingpower to transformer 1 & 2 Nos.

To

Triangular ConfigurationTriangular Configuration

Voltage Drop at Incomer Network-2 feeding power to transformer 3 to 8 Nos.

Input Data Details

Voltage Drop Calculation forTriangular configuration of ACSR conductor

m.chauhanTypewritten textPage 6 of 9

Conductor From

unit

Incomer-1 F1F1 F2F1 F3

Incomer-2 F4F4 F5F5 F6F4 F7F7 F8F8 F9F8 F10

F10 F11Input DataSource Voltage kV 20.0000 19.9901 19.9901 20.0000 19.9979 19.9920 19.9979 19.9970 19.9885 19.9885 19.9815Receiving End Voltage kV 19.9901 19.9880 19.9853 19.9979 19.9920 19.9891 19.9970 19.9885 19.9871 19.9815 19.9808

Load in KVA kVA 350 100 250 1200 500 250 700 450 100 350 250Current (I) Amp. 10.10 2.89 7.22 34.64 14.44 7.22 20.21 12.99 2.89 10.11 7.22Conductor Type 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSRD (Dia. of Conductor) mm 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7R (Radius of Conductor) mm 5.85 5.85 5.85 5.85 5.85 5.85 5.85 5.85 5.85 5.85 5.85L (Length of Conductor) kM 1.051 0.778 0.712 0.065 0.438 0.434 0.046 0.704 0.52 0.746 0.1Resistance at 20C Ohm/Km 0.4132 0.4132 0.4132 0.4132 0.4132 0.4132 0.4132 0.4132 0.4132 0.4132 0.4132

Spacing B/W ConductorDab Mtr 0.89 0.89 0.89 0.89 0.89 0.89 0.89 0.89 0.89 0.89 0.89Dbc Mtr 0.89 0.89 0.89 0.89 0.89 0.89 0.89 0.89 0.89 0.89 0.89Dca Mtr 1.78 1.78 1.78 1.78 1.78 1.78 1.78 1.78 1.78 1.78 1.78Deq(GMD) GeometricMean Distance (Deq) Mtr 1.121329734 1.121329734 1.121329734 1.121329734 1.121329734 1.121329734 1.121329734 1.121329734 1.121329734 1.121329734 1.121329734

Inductance of Line H/Km 0.00110 0.00110 0.00110 0.00110 0.00110 0.00110 0.00110 0.00110 0.00110 0.00110 0.00110Inductive reactance of Line Ohm/Km 0.34594 0.34594 0.34594 0.34594 0.34594 0.34594 0.34594 0.34594 0.34594 0.34594 0.34594

Impedance (Z) Ohm 0.53890 0.53890 0.53890 0.53890 0.53890 0.53890 0.53890 0.53890 0.53890 0.53890 0.53890

Voltage Drop (Vd) V 9.91 2.10 4.80 2.10 5.90 2.92 0.87 8.54 1.40 7.04 0.67

Receiving End Voltage kV 19.9901 19.9880 19.9853 19.9979 19.9920 19.9891 19.9970 19.9885 19.9871 19.9815 19.9808

Current (I) Amp. 10.10 2.89 7.22 34.64 14.44 7.22 20.21 12.99 2.89 10.11 7.22Percentage of Voltage Drop wrt Source Voltage20kV %Vd 0.0496 0.0600 0.0736 0.0105 0.0400 0.0546 0.0148 0.0575 0.0645 0.0927 0.0961

Horizontal Configuration (For pin Type insulator) Horizontal Configuration (For pin Type insulator)

Voltage Drop at Incomer Network-1feeding power to transformer 1 & 2 Nos.

Voltage Drop Calculation for

Horizontal configuration (Pin Type) of ACSR conductor

Input Data Details To

Voltage Drop at Incomer Network-2 feeding power to transformer 3 to 8 Nos.

m.chauhanTypewritten textPage 7 of 9

Conductor From

unit

Incomer-1 F1F1 F2F1 F3

Incomer-2 F4F4 F5F5 F6F4 F7F7 F8F8 F9F8 F10

F10 F11Input DataSource Voltage kV 20.0000 19.9901 19.9901 20.0000 19.9979 19.9920 19.9979 19.9970 19.9885 19.9885 19.9815Receiving End Voltage kV 19.9901 19.9880 19.9853 19.9979 19.9920 19.9891 19.9970 19.9885 19.9871 19.9815 19.9808

Load in KVA kVA 350 100 250 1200 500 250 700 450 100 350 250Current (I) Amp. 10.10 2.89 7.22 34.64 14.44 7.22 20.21 12.99 2.89 10.11 7.22Conductor Type 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSR 70/12 ACSRD (Dia. of Conductor) mm 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7 11.7R (Radius of Conductor) mm 5.85 5.85 5.85 5.85 5.85 5.85 5.85 5.85 5.85 5.85 5.85L (Length of Conductor) kM 1.051 0.778 0.712 0.065 0.438 0.434 0.046 0.704 0.52 0.746 0.1

Resistance at 20COhm/Km 0.4132 0.4132 0.4132 0.4132 0.4132 0.4132 0.4132 0.4132 0.4132 0.4132 0.4132

Spacing B/W ConductorDab Mtr 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85Dbc Mtr 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.85Dca Mtr 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7Deq(GMD) GeometricMean Distance (Deq) Mtr 1.070932892 1.070932892 1.070932892 1.070932892 1.070932892 1.070932892 1.070932892 1.070932892 1.070932892 1.070932892 1.070932892

Inductance of Line H/Km 0.00109 0.00109 0.00109 0.00109 0.00109 0.00109 0.00109 0.00109 0.00109 0.00109 0.00109Inductive reactance of Line Ohm/Km 0.34305 0.34305 0.34305 0.34305 0.34305 0.34305 0.34305 0.34305 0.34305 0.34305 0.34305

Impedance (Z) Ohm 0.53705 0.53705 0.53705 0.53705 0.53705 0.53705 0.53705 0.53705 0.53705 0.53705 0.53705

Voltage Drop (Vd) V 9.88 2.09 4.78 2.09 5.88 2.91 0.86 8.51 1.40 7.02 0.67

Receiving End Voltage kV 19.9901 19.9880 19.9853 19.9979 19.9920 19.9891 19.9970 19.9885 19.9871 19.9815 19.9808

Current (I) Amp. 10.10 2.89 7.22 34.64 14.44 7.22 20.21 12.99 2.89 10.11 7.22Percentage of Voltage Drop wrt Source Voltage20kV %Vd 0.0494 0.0598 0.0733 0.0105 0.0399 0.0545 0.0148 0.0573 0.0643 0.0924 0.0958

Horizontal Configuration (For Tension Type insulator) Horizontal Configuration (For Tension Type insulator)

Voltage Drop Calculation for

Horizontal configuration (Tension Type) of ACSR conductor

Voltage Drop at Incomer Network-1feeding power to transformer 1 & 2 Nos.

Input Data Details To

Voltage Drop at Incomer Network-2 feeding power to transformer 3 to 8 Nos.

m.chauhanTypewritten textPage 8 of 9

ANNEXURE-1

REFERENCE DWG. No.- NEP-MM-EL-65283432 OHL LAYOUT

a c

b

Dab

Dbc

Dcaa c

Dab Dbc

Dca

b

TRIANGULAR CONFIGURATION HORIZONTAL CONFIGURATION

LABA QUDOGHVILLAGE

m.chauhanTypewritten textPage 9 of 9

Voltage drop calculation - MV Circuit.xls.pdfVoltage drop calculation - MV Circuit.xls2.pdfVoltage drop calculation - MV Circuit.xls3.pdf