Cable Rating Verification for North Arm Bridge
Transcript of Cable Rating Verification for North Arm Bridge
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8/6/2019 Cable Rating Verification for North Arm Bridge
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Study: North Arm Bridge Model, Cables in Duct and in Air (Shaded)
Execution: Steady State Analysis
Date: 08/03/2011
Frequency: 50 Hz
Conductor Resistances: IEC-228
Fraction of conductor current returning
through sheath for single phase cables: 0
Value
55
Shaded
0
0
GROUP CABLES IEC
60287-2-2
2
Load Factor Temperature Ampacity
X[m] Y[m] [p.u.] [C] [A]
1 A 0 0.5 1 89.3 1615.3
1 B 0.68 0.5 1 90 1615.3
1 C 1.36 0.5 1 89.2 1615.3
Bernardo David
3 \ 1
Cable\Cable
type noCircuit Phase
Location
1 \ 1
2 \ 1
Configuration Type
Configuration Selected
Summary Results
Solution converged
Shaded/Exposed to Sun Shaded/Exposed
Solar Radiation W/m2
Sun Absorption Coefficient p.u.
Summary
Results
Installation Type: Cables in Air
Parameter Unit
Ambient Temperature C
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Study: North Arm Bridge Model, Cables in Duct and in Air (Shaded)
Execution: Steady State Analysis
Date: 08/03/2011
No Unit 1
1 1
2 1
3 kV 275
4 mm2 2000
5 C 90
6 C 105
7 copper
8 uW.cm 1.7241
9 1/K 0.00393
10 C 234.5
11 J/K.m3 3.45
12 6 segments
13 No
14 0.44
15 0.37
16 mm 54.3
17 Yes
18 mm 2.4
19 mm 59.1
20 Yes
21 XLPE (unfilled)
22 K.m/w 3.5
23 0.001
24 2.5
25 mm 25
26 mm 109.1
27 Yes
28 semi-conducting
29 mm 2.1
30 mm 113.3
31 Yes
32 No
Cables input data
Diameter
Sheath
Is layer present?
Is around each core? (Only for Three core cable)
Thickness
Diameter
Insulation screen
Is layer present?
Material
Thickness
Insulation
Is layer present?
Material
Thermal resistivity
Dielectric loss factor - ( tan d )
Relative permittivity ( e )
kp (Proximity effect coefficient)
Diameter
Conductor shield
Is layer present?
Thickness
Diameter
Temperature coefficient
Reciprocal of temperature coefficient of resistance (BETA)
Volumetric specific heat (SH)
Construction
Is cable dried?
ks (Skin effect coefficient)
Maximum Steady-State Conductor Temperature
Maximum Emergency Conductor Temperature
Construction
Conductor
Material
Resistivity @20C
Description
General cable information
Cable type no
Number of cores
Voltage
Conductor area
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33 aluminum
34 uW.cm 2.84
35 1/K 0.00403
36 C 228
37 J/K.m3 2.5
38 Corrugated
39 mm 3
40 mm 65
41 mm 68
42 mm 11.35
43 mm 136
44 Yes
45 polyethylene
46 K.m/w 3.5
47 mm 9
48 mm 154
49 mm 154
No Unit 1
1 Yes
2 0.3
3 Yes
4 3.5
5 Yes
6 Yes
7 mm 2258 mm 250
No Symbol Description Unit 1 2 3
1 Cable type no 1 1 1
2 Circuit no 1 1 1
3 Phase A B C
4 qc Conductor temperature C 89.3 90 89.2
5 qi Sheath/Shield temperature C 72.7 73.4 72.6
6 qj Armour/Pipe or Jacket temperature C 70.2 70.8 70.1
7 qs Exterior duct temperature C 0 0 0
8 qa Ambient temperature C 55 55 55
Duct/Pipe dimensions
Inside diameter of Duct/PipeOutside diameter of Duct/Pipe
Temperature calculations
Polyethylene duct in air
Resistivity (RH)
Minor section length
Cross bonded cable system, section lengths unknown
Cables touching
Single conductor cables NOT touching
SPECIFIC INSTALLATION DATA
Bonding
1-CON, sheaths cross bonded, flat configuration
Loss factor constant
Loss factor constant
Duct construction
Thermal resistivity
Thickness
Diameter
Overall cable diameter
Diameter
Description/Value
Outer radius of the corrugated sheath
Thickness
Diameter
Jacket
Is layer present?
Material
Temperature coefficient
Reciprocal of temperature coefficient of resistance (BETA)
Volumetric specific heat (SH)
Corrugated construction
Thickness of the corrugated sheath
Inner radius of the corrugated sheath
Material
Resistivity @20C
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Cable type no: 1
Cable type: EXTRUDED
Cable ID: ACR LSC
Cable title: 275KV, 2000 mm2 XLPE Cu Milliken
Bernardo David
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Electrical Parameters
Study: North Arm Bridge Model, Cables in Duct and in Air (Shaded)
Execution: Steady State Analysis
Date: 08/03/2011
No Unit 1 2 3
1 1 1 1
2 W/km 0.009 0.009 0.009
3 W/km 0.01145 0.01148 0.01145
4 W/km 0.01001 0.01001 0.01001
5 W/km 0.01274 0.01276 0.01274
6 W/km 0.02318 0.02318 0.02318
7 W/km 0.0281 0.02816 0.02809
8 W/m 33.29602 33.29602 33.29602
9 W/m 1.79433 1.79433 1.79433
10 W/m 0.94555 2.38695 0.68289
11 W/m 0 0 0
12 W/m 36.03591 37.47731 35.77325
13 mF/km 0.22656 0.22656 0.22656
14 mH/km 0.74037 0.74037 0.74037
15 W/km 0.23259 0.23259 0.23259
16 mH/km 0.51576 0.51576 0.51576
17 W/km 0.16203 0.16203 0.16203
18 W/km0.01274 +
j0.23259
0.01276 +
j0.23259
0.01274 +
j0.23259
19 W/km0.01274 -
j0.23259
0.01276 -
j0.23259
0.01274 -
j0.23259
20 W/km0.03318 +
j0.16203
0.03318 +
j0.16203
0.03318 +
j0.16203
21 W 57.16518 57.16518 57.16518
22 kV/mm 8.76482 8.76482 8.76482
23 kV/mm 4.74794 4.74794 4.74794
24 MW.km 97.56406 97.56406 97.56406
25 MW.km 0.97564 0.97564 0.97564
26 0.04471 0.04471 0.04471
27 kVAR/km 5383.1758 5383.1758 5383.1758
28 A/km 11.30141 11.30141 11.30141
29 V/A/km 0.02207 0.0221 0.02206
30 V/km 0 0 0
Reduction factor
Charging Capacity of three phase system at Uo
Charging Current for One Phase
Voltage Drop for Three Phase System
Induced Voltage on Metallic Sheath
Surge Impedance
Others
Dielectric Stress at Conductor Surface
Dielectric Stress at Insulation Surface
Insulation Resistance @ 20C
Insulation Resistance @ 90C
Reactance of Conductor
Inductance of Metallic Sheath
(Flat formation, regular transposition and cross bonded)
Reactance of Metallic Sheath
Positive Sequence Impedance
Negative Sequence Impedance
Zero Sequence Impedance
Metallic Screen Losses
Armor/Pipe Losses
Total Losses
Capacitance, Inductance, Impedance
Capacitance
Inductance of Conductor
AC Resistance of Conductor @ Operating Temperature
DC Resistance of Sheath @ 20C
DC Resistance of Sheath @ Operating Temperature
Losses
Conductor Losses
Dielectric Losses
Description
Cable type no
Resistances (DC/AC)
DC Resistance of Conductor @ 20C
DC Resistance of Conductor @ Operating Temperature
AC Resistance of Conductor @ 20C
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Study: North Arm Bridge Model, Cables in Duct and in Air (Shaded)
Execution: Steady State Analysis
Date: 08/03/2011
No Symbol Description Unit 1 2 3
1 Cable type no 1 1 1
2 Ro Conductor DC Resistance at 20C W/m 9.00E-06 9.00E-06 9.00E-06
3 R' Conductor DC Resistance at Max Temp W/m 1.15E-05 1.15E-05 1.14E-05
4 R Conductor AC Resistance at Max Temp W/m 1.27E-05 1.28E-05 1.27E-05
5 Ks Factor Used in Calculating Xs (Skin Effect) 4.40E-01 4.40E-01 4.40E-01
6 Kp Factor Used in Calculating Xp (Proximity Effect) 3.70E-01 3.70E-01 3.70E-01
7 ys Skin Effect Factor 1.11E-01 1.10E-01 1.11E-01
8 yp Proximity Effect Factor 1.73E-03 1.72E-03 1.73E-03
9 dc Conductor Diameter m 5.43E-02 5.43E-02 5.43E-02
10 c Distance Between Conductor Axes m 0.00E+00 0.00E+00 0.00E+00
11 C Cable Capacitiance F/m 2.27E-10 2.27E-10 2.27E-10
12 tan d Dielectric Loss Factor 1.00E-03 1.00E-03 1.00E-03
13 e Insulation Relative Permitivity 2.50E+00 2.50E+00 2.50E+00
14 Wd Cable Dielectric Losses Per Phase W/m 1.79E+00 1.79E+00 1.79E+00
15 l1 Screen Loss Factor 2.84E-02 7.17E-02 2.05E-02
16 l'1 Screen Loss Factor Caused by Circulating Current 8.50E-03 0.00E+00 0.00E+00
17 l''1 Screen Loss Factor Caused by Eddy Current 1.99E-02 7.17E-02 2.05E-02
18 l2 Armour Loss Factor 0.00E+00 0.00E+00 0.00E+00
19 Rs Screen AC Resistance at Cable Normal Operation W/m 2.81E-05 2.82E-05 2.81E-05
20 gs Coefficient Used in IEC 60287-1-1 Clause 2.3.6.1 1.02E+00 1.02E+00 1.02E+00
21 b1 Coefficient Used in IEC 60287-1-1 Clause 2.3.6.1 1.18E+02 1.18E+02 1.18E+02
22 rs Screen Electrical Resistivity @ Operating Temp. W.m 2.84E-08 2.84E-08 2.84E-08
23 Ds External diameter of Screen (Sheath) m 1.33E-01 1.33E-01 1.33E-01
24 ts Screen (Sheath) Thickness m 3.00E-03 3.00E-03 3.00E-03
25 m Coefficient Used in IEC 60287-1-1 Clause 2.3.6.1 1.12E+00 1.12E+00 1.12E+00
Centre Phase
26 l0 Coefficient Used in IEC 60287-1-1 Clause 2.3.6.1 3.05E-02 3.05E-02 3.05E-02
27 D1 Coefficient Used in IEC 60287-1-1 Clause 2.3.6.1 5.94E-03 5.94E-03 5.94E-03
28 D2 Coefficient Used in IEC 60287-1-1 Clause 2.3.6.1 0.00E+00 0.00E+00 0.00E+00
Leading Phase
29 l0 Coefficient Used in IEC 60287-1-1 Clause 2.3.6.1 7.62E-03 7.62E-03 7.62E-03
30 D1 Coefficient Used in IEC 60287-1-1 Clause 2.3.6.1 3.05E-02 3.05E-02 3.05E-02
31 D2 Coefficient Used in IEC 60287-1-1 Clause 2.3.6.1 4.44E-06 4.44E-06 4.44E-06
Lagging Phase
32 l0 Coefficient Used in IEC 60287-1-1 Clause 2.3.6.1 7.62E-03 7.62E-03 7.62E-03
33 D1 Coefficient Used in IEC 60287-1-1 Clause 2.3.6.1 -6.33E-03 -6.33E-03 -6.33E-03
Cable Parameters under
Normal Operation
Normal Operation IEC 60287-1-1
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8/6/2019 Cable Rating Verification for North Arm Bridge
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Study: North Arm Bridge Model, Cables in Duct and in Air (Shaded)
Execution: Steady State Analysis
Date: 08/03/2011
No Symbol Description Unit 1 2 3
Cable Parameters under
Normal Operation
34 D2 Coefficient Used in IEC 60287-1-1 Clause 2.3.6.1 9.21E-04 9.21E-04 9.21E-04
35 d Screen or sheath mean diameter m 1.30E-01 1.30E-01 1.30E-01
36 X Screen (Sheath) Reactance W/m 1.62E-04 1.62E-04 1.62E-04
37 M Coefficient Used in IEC 60287-1-1 Clause 2.3.5 0.00E+00 0.00E+00 0.00E+00
38 N Coefficient Used in IEC 60287-1-1 Clause 2.3.5 0.00E+00 0.00E+00 0.00E+00
39 Xm Coefficient Used in IEC 60287-1-1 Clause 2.3.5 W/m 0.00E+00 0.00E+00 0.00E+00
40 F Coefficient Used in IEC 60287-1-1 Clause 2.3.5 0.00E+00 0.00E+00 0.00E+00
41 T1 Thermal Resistance Between Conductor-Screen C.m/W 0.4863 0.4863 0.4863
42 t1 Insulation Thickness Between Conductor-Screen m 0 0 0
43 rTi Thermal Resistivity of Insulation C.m/W 3.5 3.5 3.5
44 T2 Thermal Resistance Between Screen and Sheath C.m/W 0 0 0
45 t2 Thickness of Bedding m 0 0 0
46 rTb Thermal Resistivity of Bedding C.m/W 0 0 0
47 T3 Thermal Resistance of Outer Serving C.m/W 0 0 0
48 t3 Thickness of Serving m 0 0 0
49 rTs Thermal Resistivity of Serving C.m/W 0 0 0
50 T3 Thermal Resistance of Jacket C.m/W 0.06924 0.06924 0.06924
51 t3 Thickness of Jacket m 0.009 0.009 0.009
52 rTj Thermal Resistivity of Jacket C.m/W 3.5 3.5 3.5
A. Cable In Air, Protected From Solar Radiation
53 T4 Thermal Resistance of Surroundings Medium C.m/W 0.42239 0.42097 0.42266
54 h Heat Dissipation Coefficient 4.42245 4.42245 4.42245
55 Z Coefficient Used in IEC 60287-2-1 Clause 2.2.1.1 0.21 0.21 0.21
56 E Coefficient Used in IEC 60287-2-1 Clause 2.2.1.1 3.94 3.94 3.94
57 Dqs Cable Surface Tempemperature Above Ambient C 0.42239 0.42239 0.42239
58 kA See IEC 287, Cl. 2.1.1 1.89567 1.89567 1.89567
59 I Cable Current Ampacity A 1615.3 1615.3 1615.3
Normal Operation IEC 60287-2-1
Bernardo David