XXXXXX: Voltage Drop& Cable Sizing Calculations
XXXXXX: Voltage Drop& Cable Sizing Calculations
XXXXXX: Voltage Drop& Cable Sizing Calculations
xxxx
P.O.BOX 111
Manama, Kingdom of Bahrain.
XXXXXX
VOLTAGE DROP& CABLE SIZING CALCULATIONS
Note:
Cable lengths used are for voltage drop calculations only. Actual length of the cables to be measured by the contractor.
Page 1 of 5
IES Project XXXXX Job ref.
Head Office Part of structure APARTMENT FOR SALE 2008086
P.0.Box 111 Date of Issue Sheet no.
Manama, Kingdom of Bahrain Rev. No. 0 1 of 2
VOLTAGE DROP CALCULATIONS
Cable or Busduct
Number of Cores
AL for Busduct)
Cable From Connected To
Derating Factor
Cable/ Busduct
Load Current A
Power Factor
Ref.
Length ( Mt)
for Busduct
MD in KVA
TCL in KW
MD in KW
current?
Rating
(V)
A MP-AS1-001 TRANSFORMER 01 3 7 1 1000 C XLPE 400 30 1808 1158 1447 0.8 2500 0.160 0.3 1.2 2089 1.43 0.36 A 0.8 CHECK 8498 2089 2500 6798 OK CHECK###
1 SMP-AS1-301 MP-AS1-001 3 1 4 120 C XLPE 400 25 138 77 97 0.8 250 0.37 2.0 8.0 140 1.29 0.32 A 0.8 OK 353 140 250 282 OK NO ###
2 SMP-AS1-401 MP-AS1-001 3 1 4 120 C XLPE 400 30 138 77 97 0.8 250 0.37 2.0 8.0 140 1.55 0.39 A 0.8 OK 353 140 250 282 OK NO ###
3 SMP-AS1-501 MP-AS1-001 3 1 4 120 C XLPE 400 35 138 77 97 0.8 250 0.37 2.0 8.0 140 1.81 0.5 A 0.8 OK 353 140 250 282 OK NO ###
4 SMP-AS1-601 MP-AS1-001 3 1 4 120 C XLPE 400 40 138 77 97 0.8 250 0.37 2.0 8.0 140 2.06 0.5 A 0.8 OK 353 140 250 282 OK NO ###
5 SMP-AS1-701 MP-AS1-001 3 1 4 120 C XLPE 400 45 138 77 97 0.8 250 0.37 2.0 8.0 140 2.32 0.6 A 0.8 OK 353 140 250 282 OK NO ###
6 SMP-AS2-801 MP-AS1-001 3 1 4 120 C XLPE 400 50 138 77 97 0.8 250 0.37 2.0 8.0 140 2.58 0.6 A 0.8 OK 353 140 250 282 OK NO ###
7 SMP-AS1-901 MP-AS1-001 3 1 4 120 C XLPE 400 55 138 77 97 0.8 250 0.37 2.0 8.0 140 2.84 0.7 A 0.8 OK 353 140 250 282 OK NO ###
8 SMP-AS1-1001 MP-AS1-001 3 1 4 120 C XLPE 400 60 152 84 106 0.8 250 0.37 2.0 8.0 152 3.38 0.8 A 0.8 OK 353 152 250 282 OK NO ###
9 SMP-AS1-1101 MP-AS1-001 3 1 4 120 C XLPE 400 65 152 84 106 0.8 250 0.37 2.0 8.0 152 3.66 0.9 A 0.8 OK 353 152 250 282 OK NO ###
10 SMP-AS1-1201 MP-AS1-001 3 1 4 70 C XLPE 400 70 72 42 52 0.8 160 0.60 2.0 8.0 75 3.16 0.8 A 0.8 OK 251 75 160 201 OK CHECK###
11 SMP-AS1-1301 MP-AS1-001 3 1 4 185 C XLPE 400 75 78 78 98 0.8 300 0.26 2.0 8.0 141 2.74 0.7 A 0.8 OK 463 141 300 370 OK CHECK###
12 SMP-AS1-001 MP-AS1-001 3 1 4 185 C XLPE 400 25 187 150 188 0.8 300 0.26 2.0 8.0 271 1.76 0.4 A 0.8 OK 463 271 300 370 OK CHECK###
13 SMP-AS1-002 MP-AS1-001 3 1 4 95 C XLPE 400 25 104 83 104 0.8 200 0.45 2.0 8.0 150 1.68 0.4 A 0.8 OK 304 150 200 243 OK CHECK###
12 SMP-AS1-B01-CHWP MP-AS1-001 3 1 4 95 C XLPE 400 40 95 95 119 0.8 200 0.45 2.0 8.0 171 3.09 0.8 A 0.8 OK 304 171 200 243 OK CHECK###
15 SPARE
16 SPARE
IES Project XXXX Job ref.
Head Office Part of structure APARTMENT FOR SALE 2008086
P.0.Box 111 Date of Issue Sheet no.
Manama, Kingdom of Bahrain Rev. No. 0 2 of 2
VOLTAGE DROP CALCULATIONS
Cable or Busduct
Number of Cores
AL for Busduct)
Cable From Connected To
Derating Factor
Cable/ Busduct
Load Current A
Power Factor
Ref.
Length ( Mt)
for Busduct
MD in KVA
TCL in KW
MD in KW
current?
Rating
(V)
A MP-AS1-002 TRANSFORMER 02 3 7 1 1000 C XLPE 400 30 1786 1166 1458 0.8 2500 0.160 0.3 1.2 2104 1.44 0.36 A 0.8 CHECK 8498 2104 2500 6798 OK CHECK###
1 SMP-AS2-301 MP-AS1-002 3 1 4 120 C XLPE 400 30 162 90 112 0.8 250 0.37 2.0 8.0 162 1.79 0.45 A 0.8 OK 353 162 250 282 OK NO ###
2 SMP-AS2-401 MP-AS1-002 3 1 4 120 C XLPE 400 35 162 90 112 0.8 250 0.37 2.0 8.0 162 2.09 0.52 A 0.8 OK 353 162 250 282 OK NO ###
3 SMP-AS2-501 MP-AS1-002 3 1 4 120 C XLPE 400 40 162 90 112 0.8 250 0.37 2.0 8.0 162 2.39 0.6 A 0.8 OK 353 162 250 282 OK NO ###
4 SMP-AS2-601 MP-AS1-002 3 1 4 120 C XLPE 400 45 162 90 112 0.8 250 0.37 2.0 8.0 162 2.69 0.7 A 0.8 OK 353 162 250 282 OK NO ###
5 SMP-AS2-701 MP-AS1-002 3 1 4 120 C XLPE 400 50 162 90 112 0.8 250 0.37 2.0 8.0 162 2.99 0.7 A 0.8 OK 353 162 250 282 OK NO ###
6 SMP-AS2-801 MP-AS1-002 3 1 4 120 C XLPE 400 55 162 90 112 0.8 250 0.37 2.0 8.0 162 3.29 0.8 A 0.8 OK 353 162 250 282 OK NO ###
7 SMP-AS2-901 MP-AS1-002 3 1 4 120 C XLPE 400 60 162 90 112 0.8 250 0.37 2.0 8.0 162 3.59 0.9 A 0.8 OK 353 162 250 282 OK NO ###
8 SMP-AS2-1001 MP-AS1-002 3 1 4 50 C XLPE 400 65 38 23 29 0.8 125 0.87 2.0 8.0 41 2.33 0.6 A 0.8 OK 197 41 125 158 OK CHECK###
9 SMP-AS2-1101 MP-AS1-002 3 1 4 120 C XLPE 400 70 64 64 80 0.8 250 0.37 2.0 8.0 115 2.99 0.7 A 0.8 OK 353 115 250 282 OK NO ###
10 SMP-AS2-001 MP-AS1-002 3 1 4 120 C XLPE 400 25 152 132 165 0.8 250 0.37 2.0 8.0 238 2.20 0.6 A 0.8 OK 353 238 250 282 OK NO ###
11 EMP-AS1-001 MP-AS1-002 3 2 4 240 C XLPE 400 30 400 320 400 0.8 630 0.21 2.0 8.0 577 1.82 0.5 A 0.8 OK 1092 577 630 874 OK CHECK###
12 SPARE
13 SPARE
1 Max. Voltage Drop Allowed (V)
V = Operating Voltage * % of Voltage Drop Allowed
b) Cables in ducts
Soil resitivity facor = 1.06
Ground temparature factor = 0.86
Depth of laying factor( for 0.6 mtr ) = 0.99
Group factor for Multicore cables = 0.93( 3 ckts)/ 0.9 (6 ckts)
Overall Derating factor =1.06 * 0.86 * 0.99 * 0.93 = 0.84 (3 ckts)
Overall Derating factor =1.06 * 0.86 * 0.99 * 0.9 = 0.81 (6 ckts)