HV and Extra HV Cables

High voltage power cables (HV): Up to 380 kV, ideal for transmission systems.

HV and Extra HV Cables

At Riyadh Cables, all XLPE insulations of our High and Extra High Voltage Cables are done pursuant to standards outlined by IEC 60840 and IEC 62067, as applicable. The conductors used are Stranded Class 2 (round for 800 mm² and below and segmental for 1000 mm² and above); conductors are of plain annealed copper or aluminum up to 2500 mm² in accordance with IEC 60228.

Standard outer sheathing of our High Voltage Cables is extruded HDPE type ST7; other PE sheathing compounds such as LLDPE, LMDPE, and MDPE are available on request.

HV and Extra HV Cables types

  • Design Philosophy

    Riyadh Cables started production of Medium voltage cables in 1986 and High Voltage Cables in 1994 and has supplied huge quantities of Medium Voltage Cables while in the High Voltage cable the cumulative quantity is more than 1000 kms of 132 kV and more than 1000 kms of 69 kV cables.

    High Voltage cables from 66 kV to 230 kV with different constructions and material manufactured by Riyadh Cables Group has been successfully type tested. 16 type tests have been performed on 132 kV cables, 6 of these type tests are with accessories. 4 type tests have been performed on 110-115 kV cables, 6 type tests have been performed on 69 kV cables and 1 type test was performed on 230 kV Cable totaling 27 type tests which prove suitability of design stress up to 9 kV /mm and lower.

    One of the above mentioned type test for 132 kV cable was performed at KEMA Netherlands and 2 type tests on 132 kV Cables have been performed at Riyadh Cables Laboratories witnessed by KEMA, Netherlands which prove the reliability and dependability of Riyadh Cables High Voltage Cables and its testing laboratories. Certification from KEMA for these tests are enclosed in this catalogue.

    Long-term tests were also performed both at Riyadh Cables Laboratories and King Saud University (6 months, 1 year, 2 years) to prove the high quality of RC manufactured cables. Breakdown tests with different constant voltages and time gave the result that cables designed at a stress of 13 kV/mm can survive more than 30 years which gives an indication that RC high voltage cables can be designed at a stress level of 8 kV/mm with a good safety margin other than the values which were considered during evaluation.

    As mentioned above, Riyadh Cables has manufactured a 230 kV cable with a stress level of 8 kV/mm. This cable was type tested as per IEC 62067 and IEC 60840 and the type test results are satisfactory. Long-term testing for 230 kV complete cable system shall be performed with this cable.

    Riyadh Cables have qualified engineers and the required software to design high voltage circuits based on local conditions. Current rating, Induced voltage, Short circuit current for conductor and screen are computed to meet customer requirement, positive, negative and zero sequence impedance are computed for Engineering purpose and Network protection.

     

     

    Experienced engineers provide supervision and certified professional jointers perform the required cable laying and accessory installations. To cope with International awareness, Riyadh Cables have purchased a HVAC site test system, which provides more accurate results about the installation and workmanship quality without affecting the system at any point. Also, very soon partial discharge test measurement equipment at site for terminations using Professor Lemke technique shall be made available which can provide a very clear indication about the termination condition and deficiency (if any) caused during installation.

  • Special Features

    Special Features of High Voltage Cables Manufactured by Riyadh Cables Group:

    I.  MATERIAL:

    1. Super smooth inner semi-conducting layer where electrical stress is at its maximum value. This shall improve the cable electrical characteristics, cable breaking strength and extend the lifetime of cable.
    2. Super-clean XLPE insulation material as contamination is one ofthe main cause of water-tree initiation in the insulation material. The level of cleanliness is higher than the requirements specified in AEIC CS7.
    3. For Watertight constructions, water swellable powder shall be provided in the conductor interstices to prevent ingress of water along the conductor axis in case of cable failure due to any reason.
    4. For watertight constructions, water swellable tapes under and over metallic screen shall be used to prevent ingress of water longitudinally, in case of damage to the outer sheath. Also, water swellable tapes shall keep the cable interior enough dry so that triggering of water trees shall be considerably minimized.
    5. For Radial Watertight constructions, copolymer coated Laminated Aluminium tape of 0.2 mm thickness is provided to prevent radial water penetration since polymeric material might allow water to diffuse in very small quantities with the passage oftime and this shall affect the cable performance in the long run.
      The metal-copolymer laminate consists of an Aluminium tape with co-polymer lamination on both sides. During extrusion of PE sheath the extruded sheath will fuse with the bonded PE lamination of metal-polyethylene laminate to form one unit. This ensures 100% radial watertight construction and shall effectively seal the underneath layers of the cable perfectly preventing penetration of moisture into the cable.
    6. Outer sheath of high-density polyethylene (HOPE), which can resist the force, applied on the cable while pulling and it is also the best polymeric material as radial water barrier.

    II.  PROCESSING:

    1. Material Handling and Conveying System: Super clean material handling and conveying system enhances the keenness of RCGC in maintaining the material at the highest level of cleanliness for the manufactured cable.

    2. Triple Extrusion: Riyadh Cables employs state-of-the-art triple cross-head extrusion where the conductor screen, insulation and insulation screen are extruded simultaneously by means of a triple cross-head which has the following advantages:

    • Uniform insulation structure.
    • Ensures extremely accurate layer thickness
    • Ensures high purity in the frontier limit between the semi-conductive layers and insulation
    • Provides optimal fusion of the individual layers without contamination.
    • Ensures a firm bond and smooth interface between each layer thus improving electrical properties.
    • Prevents unforeseen damage to the conductor or insulation screen during manufacturing process.

    3. Dry Curing (Peroxide Curing): The Insulated conductor is fed into the cross¬linking zone where a computer caldulated and controlled heat treatment takes place in a dry inert gas (nitrogen) pressurized atmosphere (dry curing).

    Cross-linking is done by agent di-cumyl peroxide (DCP). Cross-linking takes place in the CCV Tube under heated and pressurized Nitrogen where DCP decomposes into two radicals which react with Polyethylene thereby causing cross linking.

    Peroxide is already mixed at the material supplier's plant with the proper balance of Anti-oxidant and Peroxide to ensure the required thermal stability and optimum curing level. Therefore, no mixing whatsoever is done at Riyadh Cables, this will prevent any problems, which might occur due to the unbalanced mixing of the material in the production stage as some other manufacturers do. Un-packing and handling of the material is also done in similar super clean environment at RCGC details of which are given in this catalogue.

    The mixing ratio is about 1 to 1.5 PHR with very small amount of anti-oxidant. The cross-link residual is gas, which defuses out of the insulation gradually. Other residuals are Acetophone and Cumyl-alcohol, which are in very low ratio. Research in this regard has proven that this material has very good effect on the insulation such as:

    1. It improves the breaking strength.
    2. It slows water tree growth in the XLPE material under service.
    3. Curing is done in heated and pressurized nltrogen which reduces micro voids and moisture content in the insulation and ensures enhanced and stable breakdown strength.

    1. Dry Cooling: The hot cross-linked core passes into the cooling part of the line to be cooled in a dry inert gas (Nitrogen) pressurized atmosphere (dry cooling) which can reduce the moisture content to the lowest level.

    2. Quality Control: Performing very strict quality control during processing such as using X-ray unit for thickness measurement in continuous mode for all extruded layers. This arrangement also facilitates recording of the trend every 2 seconds. The unit continuously scans 3600 geometry of the cable and displays maximum, minimum and eccentricity of all three layers separately. Any deviation between specified values and measured values are recorded and adjusted automatically.

    Also included in the CCV line is the "Twin Rot System" one of the latest in manufacturing technology, which ensures superior control of eccentricity and eliminates the possibility of pear-drop as the cable rotates during manufacture.

    Use of a very sophisticated software for temperature adjustment in the curing zone of CCV line ensures optimum XLPE characteristics are achieved.

  • Cable Compounds

    Insulating Compounds for Cable

    Insulating Compound Maximum conductor temperature °C
    Normail Operation Short Circuit
    (Max. duration 5s)
    Low density thermoplastic polyethylene (PE) 70 130 1)
    High density thermoplastic polyethylene (HDPE) 80 160 1)
    Cross-linked polyethylene (XLPE) 90 250
    Ethylene-propylene rubber (EPR) 90 250
    High modulus or hard grade ethylene-propylene rubber (HEPR) 90 250
    1) For PE and HOPE, short circuit temperature up to 20° C in excess of those shown may be acceptable with suitable semi-conducting layers over the conductor and the insulation and by agreement between manufacturer and purchaser.

    Over Sheathing Compounds for Cables

    SB, XB Both ends SB, XB
     Polyvinyl Chloride (PVC) ST1 80
      ST2 90
     Polyethylene ST3 80
      ST4 90

    Tan δ Requirements for Insulating Compounds for Cables

    Designation of Compound PE HDPE EPR/HEPR XLPE
    Maximum tan 10-4 10 10 50 10 1)
    1) For cables produced with an XLPE compound containing special additives, the maximum tan δ is 50x10 -4
  • Properties of Polyethylenes

    PROPERTIES Low Density PE MDPE HDPE Irradiated PE
    (XLPE)
    XLPEa
      Volume resistivity, Ω - cm  > 1016  > 1016  > 1015  > 1015  > 1015
      Dielectric strength Short time, v/mil  460-700  500-700  450-500  2500b  550
      Step-by-step, V/mil  420-700  500-700  440-600  1800b  500
      Dielectric Constant
      60 Hz  2.3  2.3  2.35  2.3  2.30
      103 Hz  2.3  2.3  2.35  2.3  -
      106 Hz  2.3  2.3  2.35  2.3  2.28
      Dissipation factor
      60 Hz  0.0002  0.0002  0.0002  0.0005  0.0003
      103 Hz  0.0002  0.0002  0.0002  0.0005  
      106 Hz  0.0002  0.0002  0.0002  0.0005  0.0004
      Arc resistance, s (ASTM D495)  Melts  Melts  > 125  -  -
      Density, g/cm3  0.910-0.925  0.926-0.940  0.941-0.965  0.92  0.92
      Modulos of elasticity in tension, psi x 105  0.17-0.35  0.25-0.55  0.8-1.5  -  -
      Percent elongation, % (ult.)  20-650  100-600  15-700  > 200  550
      Tensile strength  14-19  19-26  26-45  -  24
      Compressive strength, psi x 103  -  -  2.4  -  -
      Rockwell hardness  R10  R15  R30-R50  -  (Shore D)
      Impact strength, ft-lb/in.  -  -  1-23  -  45
      Heat distortion temperature (at 66 psi), °F  105-121  120-150  140-185  -  -
      Thermal conductivity, cal/cm.s. °C x 10-4  8  -  11-12  -  -
      Thermal expansion, in/in. per °C x 10-5  11-30  15-30  15-30  20  -
      Water absorption, %  < 0.02  < 0.02  < 0.01  Nil  -
      Burning Gate  Slow  Slow  Slow  -  -
      aUnion Carbide HFDE-4201 NR EC crosslinkable compound. bA 5-mil film.
  • Properties of PVC and semi-conductive polyethylene Jackets

    PHYSICAL PROPERTIES OF PVC, THERMOPLASCTIC INSULATION

    AND SEMI-CONDUCTIVE POLYETHYLENE JACKETS

    Physical Property Test Method PVC LDPE LLDPE LPDPE LHDPE Semiconducting Thermoplastic PE
    Melt index (190°, 2.1 kg), g/10 min  ASTM D1238  -  0.25  0.55  0.70  0.15  
    Density (23°C) g/cm3  ASTM D1505  -  0.93  0.93  0.95  0.96  1.12
    Tensile strength Psi  ASTM  > 1500  2100  2350  3500  4000  1600
    Mpa  D638  10.3  14.5  15.5  24.1  27.6  11.0
    Tensile elongation percent  ASTM D638  > 100  650  650  900  800  250
    DSC melting point °C Flexural modulus    -  110  119  125  130  
    Psi  ASTM  -  38,000  55,000  90,000  145,000  
    Mpa  D790    262  379  621  1000  
    Dielectric Constant (1 MHz)  ASTM D1531  -  2.60  2.50  2.52  2.56  
    Dissipation factor (1 MHz) rad  ASTM D1531  -  0.005  0.0003  0.0003  0.0003  
    Dielectric strength, 0.030 in. Insulation thickness at 500V/s rate of rise V/mil kV/mm  ASTM D149  -  -  1230
    46.6
         
    Heat distortion at 115°C    -  90  22  7  0  
    121°C    20          
    135°C    -  Melted  Melted  Melted  Melted  
    Abrasion resistance, mg/100 revolutions  ASTM D3389  -  29  22  16  14  
    Shore D hardness  ASTM D2240  -  54  56  61  66  
    Cut-througth resistance lb    -  2600  3000  3600  4000  
    N x 104    -  1.20  1.3  1.6  1.8  
    Water vapor transmission G/24 hr/m2  ASTM E96  310.0  1.16  0.74  0.51  0.32  < 1.5
    Brittleness temperature, °C  ASTM D3389  -  -  -60  -  -  -24

    Note : LDPE, LLDPE, LMDPE, LHDPE, and semiconducting thermoplastic PE are Union carbide compounds.

  • Cable Design

    High Voltage Cables are usually single core. The Basic Design of High Voltage XLPE Cables is as shown below:

    CU/XLPE/CUW/PE

     

    CU/XLPE/CUT/PE

    CU/XLPE/LEAD/PE

    CU/XLPE/CUW/LAT/PE

    CU/XLPE/CUW/LEAD/PE

     

     

    Construction

    Conductors: Conductors are made of Copper or Aluminium. Conductors upto and including cross¬sectional area 800 mm2 are of round stranded compacted type. Conductors of cross¬sectional area 1000 mm2 upto 2000 mm2 are of Milliken design i.e., 5 segments and one central round conductor assembled together to form a overall round section. This is in order to reduce the skin effect and ensure better compaction and flexibility. Conductors shall comply in design and properties with IEC 60228.

    Conductor formation comprises mainly of drawing and stranding. Wires of required diameter are drawn in drawing machines and stranding performed in stranding machines. In-process Quality Control monitor the specified requirements to ensure that the conductor meets the requirements.

    Extrusion


    Semi-conductive screens and Insulation: The Inner semi-conductive layer (conductor screen), XLPE insulation and the outer semi¬conductive layer (insulation screen) are applied simultaneously over the compacted conductor by triple extrusion.

    Extrusion of the above is performed in continuous caternary vulcanizing (CCV) line specially designed for manufacture of high voltage cables. Each component of the line has been carefully selected to ensure the best quality product.

    Material and Material Handling

    Specifically chosen, approved standard quality super clean material from the world renowned leading manufacturers of XLPE material is used alongwith super smooth material for semi-conductive screens as the compounds should meet strict standards of cleanliness.

    Utmost precaution is taken to ensure cleanliness during handling and conveying of the material. A clean room material handling and conveying system designed by German Companies specialized in clean room technology is installed which ensures a cleanliness better than class 100 of US Federal standard 209D.

    Quality Control and Testing

    High voltage cables are subjected to continuous monitoring and tests are performed starting from the time of receiving material right through various stages of production and routine testing.

    Routine Tests, Sample tests and Type tests (when required) are carried out in accordance with IEC, AEIC and other related International Standards. Table showing the test requirements as per IEC 60840 are shown in Table.

    Riyadh Cables has equipped itself with the most modern laboratories and equipment including the following test fields:

    1) Routine test field with a large shielded enclosure for carrying out routine high voltage tests, high voltage tests, partial discharge measurements up to 400 kVat a noise level below 2 pC and for measurements oftangent delta.

    2) Extra high voltage laboratory containing basically a 2400 kV impulse generator, 400 kV AC test system extendable upto 800 kV and heating equipment for conducting special tests, type tests on high voltage cables and accessories, longterm tests and tests to determine breakdown data.

  • Technical Information

    Cable Losses :

    Cable losses can be divided as current dependent a nd voltage dependent. Voltage dependent losses arise in the di-electric due to change of polarity in the alternating field which di-electric losses.

    Di-electric loss per unit length in each phase is given by:

    Wd=w C U2o tan (W/m)

    Current dependent cable losses comprise of the following:

    • Ohmic conductor losses
    • Losses due to skin effect
    • Losses due to proximity effect
    • Losses in metallic sheath

     

    Ohmic conductor losses: These are dependent on the material and temperature and are calculated as follows:

    Wc = 12R (W/m)

    where:

    R is the a.c resistance of conductor at operating temperature and calculated as

    R = R2 ( [1 a(t-20)]
    a = 0.00393 for Copper,
    a = 0.00403 for Aluminium,
    t = temperature in °C

    Losses due to skin effect: These are caused by the displacement of the current into the outer areas of the conductor and increase approximately with the square of the frequency. These can be reduced by special conductor constructions (segmental conductors). The losses can make up to 8 to 17% of the ohmic losses of the conductor for cross-sections between 500 mm2 to 2000 mm2.

     

    Losses due to proximity effect: These are caused by parallel conductors laid close together Le., by magenetic fields. If the cables are laid far apart, the effect can be reduced to 10% of the ohmic conductor losses even for large conductor cross-sections.

    Sheath Losses: Power loss in sheath or screen are caused by eddy currents and induced sheath current

    Eddy current losses are produced in all metal parts adjacent to the conductor especially in presence of large conductor currents.

    Induced sheath current: Because the metal sheath of a single core cable is linked much more closely to the alternating magenetic field of its own conductor than to the altrernating current field of the other two phase conductors, the result is an induced voltage along the length of the cable. This amounts to approximately 60 to 150 V/km per kA of the conductor current for practical installation purpose. If the sheath is bonded at both ends, this results in a longitudinal sheath current with correspnding extra losses in the sheath.

    If longitudinal sheath resistance Rm is known, the following formula can be used to determine sheath current Im:

      XM = ω x 0.2 x Ln x 10-3

      Ui = XM I L

      ZM = (RM² + XM²)½

      IM =

      Where :

      XM = Mutual reactance of sheath (Ω/Km)

      S = Space between cable axis (mm).

      dM = Mean diameter of sheath (mm).

      Ui = Induced voltage on sheath (kV)

      ZM = Sheath Impedance (Ω/Km)

      I = Phase current (kA)

      Sheath losses are calculated as follows:

      Ws = IM² x RM

     

    Bonding Systems: In addition, extra losses can arise as a result of magnetic reversal on ferrous materials in the vicinity us the cable. Sheath losses may influence the ampacity of the cables considerably. These can be reduced by grounding the sheath at one end only, in which case the free cable end has to be fitted with over voltage protection. The disadvantage of the one side grounding is that the zero sequence impedance rises considerably, possibly leading to interferance problems with nearby tele-communication cables. Another method fo reducing sheath losses is cross-bonding.

     

    Single point Bonding: In case the actual circuit is too small to accommodate one or two lengths, single point bonding can be adopted where the sheath is directly bonded at one end and is bqnded through an SVL at the other end. In this case there shall be no circulating currents but, there shall be induced voltage at one end, the value of which can be computed. Induced voltage here can be treated in a similar way as for cross-bonding system. In case of fault, the maximum acceptable induced voltage depends on outer sheath characteristics and in such case a ground continuity conductor is required to carry the earth fault and also help in reducing the induced voltage during earth fault conditions.

    Cross bonding system: This can be considered when the circuit length can be sub-divided into major sections and each major section can be divided into three equal minor sections taking into consideration the reduction in number of joints to a minimum as the weakest point in the circuit is the joint.

    It is possible to reduce the resultant sheath voltage to low levels. Particularly with larger conductor cross-sections and on cable lengths with joints, by carrying cross bonding at about every 1/3rd of the sheath length of each phase in series, reduces the resultant sheath voltage to zero. Even sheath grounded at both ends, reduces the extra sheath losses drastically. The zero sequence impednace is practically of the same low level as in normal both end grounded system.

    The cyclic permutation of longitudinal sheath connections results in similar sheath over voltage problems at points where the subdivided sheaths are insulated as in single grounded cable sheath. Therefore, these insulated points will have to be provided with suitable over voltage protection (surge arrestors, non-linear silicon-carbide or zinc oxide resistors)

    Mixed System: Sometimes mixed system Le., cross-bonding and single point bonding in the same circuit can be used where the number of minor sections cannot be divided over 3 such as 4 or 5 sections. Here cross-bonding system can be considered for the first 3 sections and single point bonding used for the other section(s).

  • 69 kV Cables generally to IEC 60840

    CU/XLPE/CUW/LAT/PE - 69 KV (72.5 KV)

    Dimensional Data

    Conductor Cross section Conductor Cross section Diameter of Conductor (approx) Thickness of Insulation (nom) Diameter over Insulation (approx) Thickness of LAT (nom) Thickness of Outer Sheath (nom) Overall Diameter (approx) Weight of Cable (approx)
    [mm²] [mm²]** [mm] [mm] [mm] [mm] [mm] [mm] [kg/km]
    300 199 20.4 13.0 49.6 0.2 4.00 66 7700
    400 199 23.2 13.0 52.4 0.2 4.00 69 8600
    500 199 26.7 13.0 55.9 0.2 4.00 73 9800
    630 199 30.4 13.0 59.6 0.2 4.00 76 11300
    800 199 33.7 13.0 62.9 0.2 4.00 80 13100
    1000 * 199 41.0 13.0 70.2 0.2 4.00 87 15800
    1200 * 199 44.0 13.0 73.2 0.2 4.00 90 17600
    1600 * 199 50.0 13.0 79.2 0.2 4.00 96 21300
    2000 * 199 56.0 13.0 85.2 0.2 4.00 102 25500

    * Round Segmental Conductor

    ** 199 mm² CUW screen shall withstand 31.5 kA for 1 second [non-adiabatic]

    Electrical Data

    Conductor Cross Section Parameters Short Circuit Current kA for 1 second Continuous Current Rating [Amperes]
    Rdc at 20°C Rdc at 90°C Inductance (Nominal) mH/km Capacitance (Nominal) Single Circuit in Ground In Free Air & Shaded Area
    Close Trefoil Flat** Close Trefoil Flat**
    [mm²] /km /km Trefoil Flat µF/Km
    Conductor Screen* Both Ends Single/ cross Single/ cross Both Ends Single/ cross Single/ cross
    300 0.0601 0.0788 0.42 0.83 0.17 42.93 31.5 348 394 455 558 607 692
    400 0.0470 0.0627 0.41 0.80 0.19 57.23 31.5 383 445 516 629 699 802
    500 0.0366 0.0503 0.39 0.78 0.20 71.54 31.5 417 502 585 707 805 933
    630 0.0283 0.0408 0.37 0.75 0.22 90.14 31.5 452 561 660 787 921 1080
    800 0.0221 0.0340 0.36 0.73 0.24 114.47 31.5 481 619 735 860 1033 1229
    1000 0.0176 0.0240 0.34 0.69 0.28 143.08 31.5 537 742 870 1008 1285 1518
    1200 0.0151 0.0211 0.33 0.68 0.29 171.70 31.5 558 793 936 1066 1394 1661
    1600 0.0113 0.0169 0.32 0.65 0.32 228.93 31.5 594 889 1068 1172 1605 1954
    2000 0.0090 0.0144 0.31 0.63 0.35 286.17 31.5 619 961 1176 1256 1780 2213

    * Maximum permissible non-adiabatic short circuit current as per IEC 949

    ** Flat formation with both ends bonded system is not recommended

    Laying Conditions

    - Ground Temperature 35 °C
    - Ground Thermal Resistivity 2.0 K.m/W
    - Laying Depth 1500 mm

     

    - Air Temperature 50 °C
    - Number of Circuits 1 circuit
    - Distance between Conductors (flat) 400 mm

     

    CU/XLPE/CUW/LEAD/PE - 69 KV (72.5 KV)

    Dimensional Data

    Conductor Cross section Conductor Cross section Diameter of Conductor (approx) Thickness of Insulation (nom) Diameter over Insulation (approx) Thickness of LAT (nom) Thickness of Outer Sheath (nom) Overall Diameter (approx) Weight of Cable (approx)
    [mm²] [mm²]** [mm] [mm] [mm] [mm] [mm] [mm] [kg/km]
    300 156 20.4 13.0 49.6 2.5 4.00 71 12800
    400 152 23.2 13.0 52.4 2.5 4.00 74 13900
    500 149 26.7 13.0 55.9 2.5 4.00 78 15400
    630 147 30.4 13.0 59.6 2.5 4.00 81 17300
    800 145 33.7 13.0 62.9 2.5 4.00 85 19300
    1000 140 41.0 13.0 70.2 2.5 4.00 92 22700
    1200 138 44.0 13.0 73.2 2.5 4.00 95 24700
    1600 134 50.0 13.0 79.2 2.5 4.00 101 28900
    2000 129 56.0 13.0 85.2 2.5 4.00 107 33600

    * Round Segmental Conductor

    ** Specified size of CUW screen along with the LEAD sheat shall withstand 31.5 kA for 1sec [non-adiabatic], [for special constructions, screen area may vary slightly]

    Electrical Data

    Conductor Cross Section Parameters Short Circuit Current kA for 1 second Continuous Current Rating [Amperes]
    Rdc at 20°C Rdc at 90°C Inductance (Nominal) mH/km Capacitance (Nominal) Single Circuit in Ground In Free Air & Shaded Area
    Close Trefoil Flat** Close Trefoil Flat**
    [mm²] /km /km Trefoil Flat µF/Km
    Conductor Screen* Both Ends Single/ cross Single/ cross Both Ends Single/ cross Single/ cross
    300 0.0601 0.0787 0.44 0.83 0.17 42.93 31.5 351 397 457 569 618 703
    400 0.0470 0.0626 0.42 0.80 0.19 57.23 31.5 386 448 518 642 711 814
    500 0.0366 0.0502 0.40 0.78 0.20 71.54 31.5 421 504 587 722 818 946
    630 0.0283 0.0406 0.38 0.75 0.22 90.14 31.5 456 564 662 805 935 1095
    800 0.0221 0.0337 0.37 0.73 0.24 114.47 31.5 487 621 737 880 1049 1246
    1000 0.0176 0.0240 0.35 0.69 0.28 143.08 31.5 545 739 872 1033 1297 1537
    1200 0.0151 0.0210 0.34 0.68 0.29 171.70 31.5 566 788 938 1093 1404 1680
    1600 0.0113 0.0168 0.33 0.65 0.32 228.93 31.5 605 880 1068 1206 1612 1975
    2000 0.0090 0.0143 0.32 0.63 0.35 286.17 31.5 633 949 1174 1296 1782 2234

    * Maximum permissible non-adiabatic short circuit current as per IEC 949 for both CUW & LEAD sheath

    ** Flat formation with both ends bonded system is not recommended

    Laying Conditions

    - Ground Temperature 35 °C
    - Ground Thermal Resistivity 2.0 K.m/W
    - Laying Depth 1500 mm

     

    - Air Temperature 50 °C
    - Number of Circuits 1 circuit
    - Distance between Conductors (flat) 400 mm
  • 69 kV Cables generally as per IEC 60840 and SEC-EOA specification

    CU/XLPE/CUW/LAT/PE - 69 KV (72.5 KV)

    Dimensional Data

     

    Conductor Cross section Conductor Cross section Diameter of Conductor (approx) Thickness of Insulation (nom) Diameter over Insulation (approx) Thickness of LAT (nom) Thickness of Outer Sheath (nom) Overall Diameter (approx) Weight of Cable (approx)
    [mm²] [mm²]** [mm] [mm] [mm] [mm] [mm] [mm] [kg/km]
    300 216 20.4 16.5 55 0.2 3.95 73 8500
    400 216 23.2 16.5 57.8 0.2 3.95 76 9400
    500 216 26.7 16.5 61.3 0.2 3.95 79 10700
    630 216 30.4 16.5 65.2 0.2 3.95 83 12200
    800 216 33.7 16.5 68.5 0.2 3.95 87 14100
    1000 * 216 41.0 16.5 76.1 0.2 3.95 94 16900
    1200 * 216 44.0 16.5 79.1 0.2 3.95 97 18700
    1600 * 216 50.0 16.5 85.1 0.2 3.95 103 22400
    2000 * 216 56.0 16.5 91.1 0.2 3.95 109 26700

    * Round Segmental Conductor

    ** 216 mm² CUW screen shall withstand 31.5 kA for 1 sec as per SEC-EOA specifications [adiabatic]

     

    Electrical Data

     

    Conductor Cross Section Parameters Short Circuit Current kA for 1 second Continuous Current Rating [Amperes]
    Rdc at 20°C Rdc at 90°C Inductance (Nominal) mH/km Capacitance (Nominal) Single Circuit in Ground In Free Air & Shaded Area
    Close Trefoil Flat** Close Trefoil Flat**
    [mm²] /km /km Trefoil Flat µF/Km
    Conductor Screen* Both Ends Single/ cross Single/ cross Both Ends Single/ cross Single/ cross
    400 0.0470 0.0626 0.42 0.80 0.15 57.23 34.42 385 447 514 631 695 788
    500 0.0366 0.0501 0.41 0.78 0.17 71.54 34.42 420 504 582 710 800 915
    630 0.0283 0.0405 0.39 0.75 0.18 90.14 34.42 455 565 657 792 916 1059
    800 0.0221 0.0336 0.38 0.73 0.19 114.47 34.42 485 623 732 866 1029 1205
    1000 0.0176 0.0239 0.35 0.69 0.22 143.08 34.42 540 745 867 1016 1278 1489
    1200 0.0151 0.0210 0.35 0.68 0.24 171.70 34.42 561 796 933 1075 1385 1628
    1600 0.0113 0.0167 0.33 0.65 0.26 228.93 34.42 596 893 1064 1182 1596 1913
    2000 0.0090 0.0143 0.32 0.63 0.28 286.17 34.42 622 967 1170 1268 1771 2165

    * Maximum permissible non-adiabatic short circuit current as per IEC 949

    ** Flat formation with both ends bonded system is not recommended

     

    Laying Conditions

     

    - Ground Temperature 35 °C
    - Ground Thermal Resistivity 2.0 K.m/W
    - Laying Depth 1500 mm

     

    - Air Temperature 50 °C
    - Number of Circuits 1 circuit
    - Distance between Conductors (flat) 400 mm

     

    AL/XLPE/CUW/LAT/PE - 69 KV (72.5 KV)

    Dimensional Data

     

    Conductor Cross section Conductor Cross section Diameter of Conductor (approx) Thickness of Insulation (nom) Diameter over Insulation (approx) Thickness of LAT (nom) Thickness of Outer Sheath (nom) Overall Diameter (approx) Weight of Cable (approx)
    [mm²] [mm²]** [mm] [mm] [mm] [mm] [mm] [mm] [kg/km]
    400 216 24.0 16.5 58.6 0.2 3.95 77 7100
    500 216 27.0 16.5 61.6 0.2 3.95 80 7700
    630 216 30.4 16.5 65.2 0.2 3.95 83 8300
    800 216 35.0 16.5 69.8 0.2 3.95 88 9200
    1000 216 42.0 16.5 77.1 0.2 3.95 95 10500
    1200 216 44.0 16.5 79.1 0.2 3.95 97 11200
    1600 216 50.0 16.5 85.1 0.2 3.95 103 12600
    2000 216 56.0 16.5 91.1 0.2 3.95 109 14300

    * Round Segmental Conductor

    ** 216 mm² CUW screen shall withstand 31.5 kA for 1 sec as per SEC-EOA specifications [adiabatic]

     

    Electrical Data

     

    Conductor Cross Section Parameters Short Circuit Current kA for 1 second Continuous Current Rating [Amperes]
    Rdc at 20°C Rdc at 90°C Inductance (Nominal) mH/km Capacitance (Nominal) Single Circuit in Ground In Free Air & Shaded Area
    Close Trefoil Flat** Close Trefoil Flat**
    [mm²] /km /km Trefoil Flat µF/Km
    Conductor Screen* Both Ends Single/ cross Single/ cross Both Ends Single/ cross Single/ cross
    400 0.0778 0.1014 0.42 0.80 0.15 37.79 34.42 321 353 403 519 551 622
    500 0.0605 0.0798 0.40 0.77 0.17 47.24 34.42 356 401 459 590 638 723
    630 0.0469 0.0631 0.39 0.75 0.18 59.52 34.42 393 455 522 669 737 842
    800 0.0367 0.0509 0.37 0.72 0.20 75.59 34.42 428 511 590 752 848 979
    1000 0.0291 0.0383 0.35 0.69 0.23 94.48 34.42 477 596 683 877 1024 1179
    1200 0.0247 0.0328 0.35 0.68 0.24 113.38 34.42 501 645 741 936 1117 1293
    1600 0.0186 0.0254 0.33 0.65 0.26 151.17 34.42 543 736 854 1051 1308 1534
    2000 0.0149 0.0211 0.32 0.63 0.28 188.97 34.42 575 810 950 1146 1476 1754

    * Maximum permissible non-adiabatic short circuit current as per IEC 949

    ** Flat formation with both ends bonded system is not recommended

     

    Laying Conditions

     

    - Ground Temperature 35 °C
    - Ground Thermal Resistivity 2.0 K.m/W
    - Laying Depth 1500 mm

     

    - Air Temperature 50 °C
    - Number of Circuits 1 circuit
    - Distance between Conductors (flat) 400 mm

     

    CU/XLPE/CUW/LAT/PE - 69 KV (72.5 KV)

     

    Dimensional Data

     

    Conductor Cross section Conductor Cross section Diameter of Conductor (approx) Thickness of Insulation (nom) Diameter over Insulation (approx) Thickness of LAT (nom) Thickness of Outer Sheath (nom) Overall Diameter (approx) Weight of Cable (approx)
    [mm²] [mm²]** [mm] [mm] [mm] [mm] [mm] [mm] [kg/km]
    300 275 20.4 16.5 55 0.2 3.95 74 9000
    400 275 23.2 16.5 57.8 0.2 3.95 77 10000
    500 275 26.7 16.5 61.3 0.2 3.95 80 11200
    630 275 30.4 16.5 65.2 0.2 3.95 84 12800
    800 275 33.7 16.5 68.5 0.2 3.95 87 14700
    1000 275 41.0 16.5 76.1 0.2 3.95 95 17400
    1200 275 44.0 16.5 79.1 0.2 3.95 98 19200
    1600 275 50.0 16.5 85.1 0.2 3.95 104 23000
    2000 275 56.0 16.5 91.1 0.2 3.95 110 27300

    * Round Segmental Conductor

    ** 275 mm² CUW screen shall withstand 40 kA for 1 sec as per SEC-EOA specifications [adiabatic]

    *** Specified nominal thickness of insulation as per AEIC CS7 as required by SEC-EOA.

     

    Electrical Data

     

    Conductor Cross Section Parameters Short Circuit Current kA for 1 second Continuous Current Rating [Amperes]
    Rdc at 20°C Rdc at 90°C Inductance (Nominal) mH/km Capacitance (Nominal) Single Circuit in Ground In Free Air & Shaded Area
    Close Trefoil Flat** Close Trefoil Flat**
    [mm²] /km /km Trefoil Flat µF/Km
    Conductor Screen* Both Ends Single/ cross Single/ cross Both Ends Single/ cross Single/ cross
    300 0.0601 0.0786 0.44 0.83 0.14 42.93 43.18 348 396 453 558 605 681
    400 0.0470 0.0626 0.43 0.80 0.15 57.23 43.18 382 448 514 629 697 789
    500 0.0366 0.0501 0.41 0.78 0.17 71.54 43.18 416 504 582 707 802 917
    630 0.0283 0.0405 0.39 0.75 0.18 90.14 43.18 450 565 657 787 919 1061
    800 0.0221 0.0336 0.38 0.73 0.19 114.47 43.18 479 624 732 860 1032 1207
    1000 0.0176 0.0239 0.36 0.69 0.22 143.08 43.18 533 745 867 1007 1280 1492
    1200 0.0151 0.0210 0.35 0.68 0.24 171.70 43.18 553 797 933 1064 1388 1631
    1600 0.0113 0.0167 0.33 0.65 0.26 228.93 43.18 587 894 1064 1169 1600 1917
    2000 0.0090 0.0143 0.32 0.63 0.28 286.17 43.18 611 968 1171 1252 1775 2169

    * Maximum permissible non-adiabatic short circuit current as per IEC 949

    ** Flat formation with both ends bonded system is not recommended

     

    Laying Conditions

     

    - Ground Temperature 35 °C
    - Ground Thermal Resistivity 2.0 K.m/W
    - Laying Depth 1500 mm

     

    - Air Temperature 50 °C
    - Number of Circuits 1 circuit
    - Distance between Conductors (flat) 400 mm

     

    AL/XLPE/CUW/LAT/PE - 69 KV (72.5 KV)

     

    Dimensional Data

     

    Conductor Cross section Conductor Cross section Diameter of Conductor (approx) Thickness of Insulation (nom) Diameter over Insulation (approx) Thickness of LAT (nom) Thickness of Outer Sheath (nom) Overall Diameter (approx) Weight of Cable (approx)
    [mm²] [mm²]** [mm] [mm] [mm] [mm] [mm] [mm] [kg/km]
    500 275 27.0 16.5 61.6 0.2 3.95 81 8200
    630 275 30.4 16.5 65.2 0.2 3.95 84 8900
    800 275 35.0 16.5 69.8 0.2 3.95 89 9800
    1000 275 42.0 16.5 77.1 0.2 3.95 96 11100
    1200 275 44.0 16.5 79.1 0.2 3.95 98 11700
    1600 275 50.0 16.5 85.1 0.2 3.95 104 13200
    2000 275 56.0 16.5 91.1 0.2 3.95 110 14800

    * Round Segmental Conductor

    ** 275 mm² CUW screen shall withstand 40 kA for 1 sec as per SEC-EOA specifications [adiabatic]

     

    Electrical Data

     

    Conductor Cross Section Parameters Short Circuit Current kA for 1 second Continuous Current Rating [Amperes]
    Rdc at 20°C Rdc at 90°C Inductance (Nominal) mH/km Capacitance (Nominal) Single Circuit in Ground In Free Air & Shaded Area
    Close Trefoil Flat** Close Trefoil Flat**
    [mm²] /km /km Trefoil Flat µF/Km
    Conductor Screen* Both Ends Single/ cross Single/ cross Both Ends Single/ cross Single/ cross
    500 0.0605 0.0798 0.41 0.77 0.17 47.24 43.18 354 402 459 589 639 725
    630 0.0469 0.0631 0.39 0.75 0.18 59.52 43.18 390 455 523 666 739 844
    800 0.0367 0.0509 0.37 0.72 0.20 75.59 43.18 424 512 591 749 850 981
    1000 0.0291 0.0383 0.35 0.69 0.23 94.48 43.18 472 597 683 871 1026 1181
    1200 0.0247 0.0328 0.35 0.68 0.24 113.38 43.18 495 645 742 929 1120 1295
    1600 0.0186 0.0254 0.33 0.65 0.26 151.17 43.18 536 736 854 1042 1311 1536
    2000 0.0149 0.0210 0.32 0.63 0.28 188.97 43.18 566 811 950 1135 1479 1757

    * Maximum permissible non-adiabatic short circuit current as per IEC 949

    ** Flat formation with both ends bonded system is not recommended

     

     Laying Conditions

    - Ground Temperature 35 °C
    - Ground Thermal Resistivity 2.0 K.m/W
    - Laying Depth 1500 mm

     

    - Air Temperature 50 °C
    - Number of Circuits 1 circuit
    - Distance between Conductors (flat) 400 mm

  • 110 kV Cables generally as per IEC 60840 and SEC-WOA specification

    CU/XLPE/CUW/LAT/PE - 110 KV (123 KV)

    Dimensional Data

    Conductor Cross section Conductor Cross section Diameter of Conductor (approx) Thickness of Insulation (nom) Diameter over Insulation (approx) Thickness of LAT (nom) Thickness of Outer Sheath (nom) Overall Diameter (approx) Weight of Cable (approx)
    [mm²] [mm²]** [mm] [mm] [mm] [mm] [mm] [mm] [kg/km]
    300 95 20.4 18.0 60 0.2 4.50 76 7800
    400 95 23.2 18.0 62.8 0.2 4.50 79 8800
    500 95 26.7 18.0 66.3 0.2 4.50 83 10100
    630 95 30.4 18.0 70 0.2 4.50 86 11700
    800 95 33.7 18.0 73.3 0.2 4.50 90 13500
    1000 * 95 41.0 18.0 80.6 0.2 4.50 97 16300
    1200 * 95 44.0 18.0 83.6 0.2 4.50 100 18200
    1600 * 95 50.0 18.0 89.6 0.2 4.50 106 21900
    2000 * 95 56.0 18.0 95.6 0.2 4.50 112 26300

    * Round Segmental Conductor

    ** 95 mm² CUW screen as per SEC-WOA specifications.

    *** Minimum required thickness ofinsulation is 16.0 mm as per SEC-WOA specifications.

    Electrical Data

    Conductor Cross Section Parameters Short Circuit Current kA for 1 second Continuous Current Rating [Amperes]
    Rdc at 20°C Rdc at 90°C Inductance (Nominal) mH/km Capacitance (Nominal) Single Circuit in Ground In Free Air & Shaded Area
    Close Trefoil Flat** Close Trefoil Flat**
    [mm²] /km /km Trefoil Flat µF/Km
    Conductor Screen* Both Ends Single/ cross Single/ cross Both Ends Single/ cross Single/ cross
    300 0.0601 0.0786 0.45 0.83 0.14 42.93 15.83 366 396 452 574 602 674
    400 0.0470 0.0625 0.43 0.80 0.15 57.23 15.83 405 448 512 651 693 781
    500 0.0366 0.0501 0.41 0.78 0.16 71.54 15.83 446 505 580 737 798 906
    630 0.0283 0.0404 0.40 0.75 0.18 90.14 15.83 487 566 655 828 913 1048
    800 0.0221 0.0335 0.38 0.73 0.19 114.47 15.83 524 624 730 912 1025 1191
    1000 0.0176 0.0239 0.36 0.69 0.22 143.08 15.83 591 745 864 1081 1268 1468
    1200 0.0151 0.0210 0.35 0.68 0.23 171.70 15.83 617 796 930 1150 1375 1605
    1600 0.0113 0.0167 0.34 0.65 0.25 228.93 15.83 662 894 1061 1278 1584 1885
    2000 0.0090 0.0142 0.33 0.63 0.27 286.17 15.83 694 968 1167 1379 1758 2132

    * Maximum permissible non-adiabatic short circuit current as per IEC 949

    ** Flat formation with both ends bonded system is not recommended.

    Laying Conditions

    - Ground Temperature 35 °C
    - Ground Thermal Resistivity 2.0 K.m/W
    - Laying Depth 1500 mm

     

    - Air Temperature 50 °C
    - Number of Circuits 1 circuit
    - Distance between Conductors (flat) 400 mm
  • 115 kV Cables generally as per IEC 60840 and SEC-EOA specification

     

    CU/XLPE/LEAD/PE - 115 KV (123 KV)

    Dimensional Data

    Conductor Cross section Diameter of Conductor (approx) Thickness of Insulation (nom) Diameter over Insulation (approx) Thickness of LAT (nom) Thickness of Outer Sheath (nom) Overall Diameter (approx) Weight of Cable (approx)
    [mm²] [mm] [mm] [mm] [mm] [mm] [mm] [kg/km]
    300 20.4 20.3 63.5 6.9 3.95 91 26600
    400 23.2 20.3 66.3 6.6 3.95 93 27300
    500 26.7 20.3 69.8 6.4 3.95 96 28800
    630 30.4 20.3 73.7 6.1 3.95 100 30200
    800 33.7 20.3 77 5.9 3.95 103 32100
    1000 * 41.0 20.3 84.3 5.4 3.95 109 34800
    1200 * 44.0 20.3 87.3 5.3 3.95 112 36800
    1600 * 50.0 20.3 93.3 5 3.95 117 40500
    2000 * 56.0 20.3 99.3 4.7 3.95 123 44700
      

    * Round Segmental Conductor

    ** Specified nominal thickness of insulation as per AEIC CS7 as required by SEC-EOA.

    *** Specified thickness of lead sheath is based on 40 kA for 1 sec [non-adiabatic], [for special constructions, lead sheath thickness may vary slightly]

    Electrical Data

    Conductor Cross Section Parameters Short Circuit Current kA for 1 second Continuous Current Rating [Amperes]
    Rdc at 20°C Rdc at 90°C Inductance (Nominal) mH/km Capacitance (Nominal) Single Circuit in Ground In Free Air & Shaded Area
    Close Trefoil Flat** Close Trefoil Flat**
    [mm²] /km /km Trefoil Flat µF/Km
    Conductor Screen* Both Ends Single/ cross Single/ cross Both Ends Single/ cross Single/ cross
    300 0.0601 0.0785 0.49 0.83 0.13 42.93 40 369 397 454 589 614 686
    400 0.0470 0.0623 0.47 0.80 0.13 57.23 40 409 446 514 668 703 793
    500 0.0366 0.0498 0.44 0.78 0.15 71.54 40 449 500 581 756 806 919
    630 0.0283 0.0401 0.43 0.75 0.16 90.14 40 490 557 655 849 919 1061
    800 0.0221 0.0331 0.41 0.73 0.17 114.47 40 527 611 729 936 1027 1203
    1000 0.0176 0.0238 0.38 0.69 0.19 143.08 40 595 715 859 1107 1250 1476
    1200 0.0151 0.0209 0.37 0.68 0.20 171.70 40 621 758 922 1178 1348 1611
    1600 0.0113 0.0165 0.36 0.65 0.22 228.93 40 668 840 1047 1312 1539 1884
    2000 0.0090 0.0140 0.34 0.63 0.24 286.17 40 704 902 1146 1421 1695 2123
      

    * Maximum permissible non-adiabatic short circuit current as per IEC 949 for LEAD sheath

    ** Flat formation with both ends bonded system is not recommended

    Laying Conditions

    - Ground Temperature 35 °C
    - Ground Thermal Resistivity 2.0 K.m/W
    - Laying Depth 1500 mm

     

    - Air Temperature 50 °C
    - Number of Circuits 1 circuit
    - Distance between Conductors (flat) 400 mm
  • 132 kV Cables generally to IEC 60840

    CU/XLPE/CUW/LAT/PE - 132 KV (145 KV)
    95mm² copper wire screen

    Dimensional Data

    Conductor Cross section Conductor Cross section Diameter of Conductor (approx) Thickness of Insulation (nom) Diameter over Insulation (approx) Thickness of LAT (nom) Thickness of Outer Sheath (nom) Overall Diameter (approx) Weight of Cable (approx)
    [mm²] [mm²]** [mm] [mm] [mm] [mm] [mm] [mm] [kg/km]
    300 95 20.4 18.0 59.6 0.2 4.50 76 7800
    400 95 23.2 18.0 62.4 0.2 4.50 79 8800
    500 95 26.7 18.0 65.9 0.2 4.50 82 10100
    630 95 30.4 18.0 69.6 0.2 4.50 86 11700
    800 95 33.7 18.0 72.9 0.2 4.50 89 13500
    1000 * 95 41.0 18.0 80.2 0.2 4.50 96 16300
    1200 * 95 44.0 18.0 83.2 0.2 4.50 99 18200
    1600 * 95 50.0 18.0 89.2 0.2 4.50 105 21900
    2000 * 95 56.0 18.0 95.2 0.2 4.50 111 26300

    * Round Segmental Conductor

    ** Screen cross-sectional area may vary according to the required short circuit current.

    Electrical Data

    Conductor Cross Section Parameters Short Circuit Current kA for 1 second Continuous Current Rating [Amperes]
    Rdc at 20°C Rdc at 90°C Inductance (Nominal) mH/km Capacitance (Nominal) Single Circuit in Ground In Free Air & Shaded Area
    Close Trefoil Flat** Close Trefoil Flat**
    [mm²] /km /km Trefoil Flat µF/Km
    Conductor Screen* Both Ends Single/ cross Single/ cross Both Ends Single/ cross Single/ cross
    300 0.0601 0.0786 0.45 0.83 0.14 42.93 15.83 366 396 452 573 602 674
    400 0.0470 0.0625 0.43 0.80 0.15 57.23 15.83 405 447 512 651 692 781
    500 0.0366 0.0501 0.41 0.78 0.16 71.54 15.83 446 504 580 737 797 906
    630 0.0283 0.0404 0.40 0.75 0.18 90.14 15.83 487 565 655 827 912 1048
    800 0.0221 0.0335 0.38 0.73 0.19 114.47 15.83 523 624 730 911 1024 1191
    1000 0.0176 0.0239 0.36 0.69 0.21 143.08 15.83 591 745 864 1081 1267 1468
    1200 0.0151 0.0210 0.35 0.68 0.23 171.70 15.83 617 796 930 1149 1374 1605
    1600 0.0113 0.0167 0.34 0.65 0.25 228.93 15.83 661 894 1061 1277 1584 1885
    2000 0.0090 0.0142 0.33 0.63 0.27 286.17 15.83 693 968 1167 1377 1758 2133

    * Maximum permissible non-adiabatic short circuit current as per IEC 949

    ** Flat formation with both ends bonded system is not recommended.

    Laying Conditions

    - Ground Temperature 35 °C
    - Ground Thermal Resistivity 2.0 K.m/W
    - Laying Depth 1500 mm

     

    - Air Temperature 50 °C
    - Number of Circuits 1 circuit
    - Distance between Conductors (flat) 400 mm
  • 132 kV Cables generally to IEC 60840 (CUW 40 kA for 1 second)

     

    CU/XLPE/CUW/LAT/PE - 132 KV (145 KV)

     255mm² copper wire screen

    Dimensional Data

    Conductor Cross section Conductor Cross section Diameter of Conductor (approx) Thickness of Insulation (nom) Diameter over Insulation (approx) Thickness of LAT (nom) Thickness of Outer Sheath (nom) Overall Diameter (approx) Weight of Cable (approx)
    [mm²] [mm²]** [mm] [mm] [mm] [mm] [mm] [mm] [kg/km]
    300 255 20.4 18.0 59.6 0.2 4.50 77 9400
    400 255 23.2 18.0 62.4 0.2 4.50 80 10300
    500 255 26.7 18.0 65.9 0.2 4.50 84 11600
    630 255 30.4 18.0 69.6 0.2 4.50 87 13200
    800 255 33.7 18.0 72.9 0.2 4.50 91 15000
    1000 * 255 41.0 18.0 80.2 0.2 4.50 98 17900
    1200 * 255 44.0 18.0 83.2 0.2 4.50 101 19700
    1600 * 255 50.0 18.0 89.2 0.2 4.50 107 23400
    2000 * 255 56.0 18.0 95.2 0.2 4.50 113 27800

    * Round Segmental Conductor

    ** 255 mm² CUW screen shall withstand 40 kA for 1 second.

    Electrical Data

    Conductor Cross Section Parameters Short Circuit Current kA for 1 second Continuous Current Rating [Amperes]
    Rdc at 20°C Rdc at 90°C Inductance (Nominal) mH/km Capacitance (Nominal) Single Circuit in Ground In Free Air & Shaded Area
    Close Trefoil Flat** Close Trefoil Flat**
    [mm²] /km /km Trefoil Flat µF/Km
    Conductor Screen* Both Ends Single/ cross Single/ cross Both Ends Single/ cross Single/ cross
    300 0.0601 0.0786 0.45 0.83 9.14 42.93 40 349 397 452 558 604 677
    400 0.0470 0.0625 0.44 0.80 0.15 57.23 40 383 449 513 629 696 783
    500 0.0366 0.0500 0.42 0.78 0.16 71.54 40 418 506 581 707 801 909
    630 0.0283 0.0404 0.40 0.75 0.18 90.14 40 452 567 656 788 916 1052
    800 0.0221 0.0335 0.39 0.73 0.19 114.47 40 481 626 731 861 1029 1195
    1000 0.0176 0.0239 0.36 0.69 0.21 143.08 40 534 746 865 1005 1272 1473
    1200 0.0151 0.0210 0.35 0.68 0.23 171.70 40 554 798 931 1063 1380 1610
    1600 0.0113 0.0167 0.34 0.65 0.25 228.93 40 589 895 1061 1168 1590 1891
    2000 0.0090 0.0142 0.33 0.63 0.27 286.17 40 613 970 1168 1252 1765 2139

    * Maximum permissible non-adiabatic short circuit current as per IEC 949

    ** Flat formation with both ends bonded system is not recommended.

    Laying Conditions

    - Ground Temperature 35 °C
    - Ground Thermal Resistivity 2.0 K.m/W
    - Laying Depth 1500 mm

     

    - Air Temperature 50 °C
    - Number of Circuits 1 circuit
    - Distance between Conductors (flat) 400 mm
  • 132 kV Cables generally as per IEC 60840 and SEC-COA specification

    CU/XLPE/CUW/LAT/PE - 132 KV (145 KV) 

    Dimensional Data

    Conductor Cross section Conductor Cross section Diameter of Conductor (approx) Thickness of Insulation (nom) Diameter over Insulation (approx) Thickness of LAT (nom) Thickness of Outer Sheath (nom) Overall Diameter (approx) Weight of Cable (approx)
    [mm²] [mm²]** [mm] [mm] [mm] [mm] [mm] [mm] [kg/km]
    300 280 20.4 19.0 61.6 0.2 5.00 81 10000
    400 280 23.2 19.0 64.4 0.2 5.00 84 11000
    500 280 26.7 19.0 67.9 0.2 5.00 88 12200
    630 280 30.4 19.0 71.6 0.2 5.00 91 13800
    800 280 33.7 19.0 74.9 0.2 5.00 95 15700
    1000 * 280 41.0 19.0 82.2 0.2 5.00 102 18600
    1200 * 280 44.0 19.0 85.2 0.2 5.00 105 20400
    1600 * 280 50.0 19.0 91.2 0.2 5.00 111 24200
    2000 * 280 56.0 19.0 97.2 0.2 5.00 117 28600

    * Round Segmental Conductor

    ** 280 mm² CUW screen as per SEC-COA requirement.

    *** Specified nominal thickness of insulation as per SEC-COA Spec 5/16.

    **** Specified nominal thickness of outer sheath as per SEC-COA requirement.

    Electrical Data

    Conductor Cross Section Parameters Short Circuit Current kA for 1 second Continuous Current Rating [Amperes]
    Rdc at 20°C Rdc at 90°C Inductance (Nominal) mH/km Capacitance (Nominal) Single Circuit in Ground In Free Air & Shaded Area
    Close Trefoil Flat** Close Trefoil Flat**
    [mm²] /km /km Trefoil Flat µF/Km
    Conductor Screen* Both Ends Single/ cross Single/ cross Both Ends Single/ cross Single/ cross
    300 0.0601 0.0786 0.46 0.83 0.13 42.93 43.95 349 398 452 559 605 674
    400 0.0470 0.0624 0.44 0.80 0.14 57.23 43.95 383 450 512 630 696 780
    500 0.0366 0.0499 0.42 0.78 0.16 71.54 43.95 417 507 580 707 801 905
    630 0.0283 0.0403 0.41 0.75 0.17 90.14 43.95 451 569 655 788 917 1047
    800 0.0221 0.0334 0.39 0.73 0.18 114.47 43.95 480 628 730 861 1031 1189
    1000 0.0176 0.0239 0.37 0.69 0.21 143.08 43.95 532 748 864 1003 1272 1465
    1200 0.0151 0.0209 0.36 0.68 0.22 171.70 43.95 552 800 930 1060 1379 1600
    1600 0.0113 0.0166 0.35 0.65 0.24 228.93 43.95 586 898 1060 1165 1590 1879
    2000 0.0090 0.0141 0.33 0.63 0.26 286.17 43.95 610 973 1166 1248 1765 2124

    * Maximum permissible non-adiabatic short circuit current as per IEC 949

    ** Flat formation with both ends bonded system is not recommended.

    Laying Conditions

    - Ground Temperature 35 °C
    - Ground Thermal Resistivity 2.0 K.m/W
    - Laying Depth 1500 mm
     
    - Air Temperature 50 °C
    - Number of Circuits 1 circuit
    - Distance between Conductors (flat) 400 mm
  • 132 kV Cables generally to IEC 60840 (CUW+LEAD 40 kA for 1 second)

    CU/XLPE/CUW/LEAD/PE - 132 KV (145 KV)

    Dimensional Data

    Conductor Cross section Conductor Cross section Diameter of Conductor (approx) Thickness of Insulation (nom) Diameter over Insulation (approx) Thickness of LAT (nom) Thickness of Outer Sheath (nom) Overall Diameter (approx) Weight of Cable (approx)
    [mm²] [mm²]** [mm] [mm] [mm] [mm] [mm] [mm] [kg/km]
    300 206 20.4 18.0 59.6 2.5 4.50 83 15400
    400 202 23.2 18.0 62.4 2.5 4.50 86 16600
    500 202 26.7 18.0 65.9 2.5 4.50 90 18200
    630 199 30.4 18.0 69.6 2.5 4.50 93 20000
    800 195 33.7 18.0 72.9 2.5 4.50 97 22200
    1000 * 192 41.0 18.0 80.2 2.5 4.50 104 25700
    1200 * 188 44.0 18.0 83.2 2.5 4.50 107 27700
    1600 * 185 50.0 18.0 89.2 2.5 4.50 113 32000
    2000 * 181 56.0 18.0 95.2 2.5 4.50 119 36800

    * Round Segmental Conductor

    ** Specified size of CUW screen along with the LEAD sheath shall withstand 40 kA for 1 sec [non-adiabatic], [for special constructions, screen area may vary slightly]

    Electrical Data

    Conductor Cross Section Parameters Short Circuit Current kA for 1 second Continuous Current Rating [Amperes]
    Rdc at 20°C Rdc at 90°C Inductance (Nominal) mH/km Capacitance (Nominal) Single Circuit in Ground In Free Air & Shaded Area
    Close Trefoil Flat** Close Trefoil Flat**
    [mm²] /km /km Trefoil Flat µF/Km
    Conductor Screen* Both Ends Single/ cross Single/ cross Both Ends Single/ cross Single/ cross
    300 0.0601 0.0785 0.47 0.83 0.14 42.93 40 351 399 454 568 614 686
    400 0.0470 0.0624 0.45 0.80 0.15 57.23 40 385 451 515 640 706 794
    500 0.0366 0.0499 0.43 0.78 0.16 71.54 40 420 508 583 719 812 921
    630 0.0283 0.0402 0.41 0.75 0.18 90.14 40 454 568 658 801 929 1065
    800 0.0221 0.0333 0.40 0.73 0.19 114.47 40 484 627 733 877 1042 1210
    1000 0.0176 0.0238 0.37 0.69 0.21 143.08 40 537 742 866 1022 1282 1489
    1200 0.0151 0.0209 0.37 0.68 0.23 171.70 40 558 792 931 1082 1388 1627
    1600 0.0113 0.0166 0.35 0.65 0.25 228.93 40 593 885 1060 1190 1594 1909
    2000 0.0090 0.0141 0.34 0.63 0.27 286.17 40 619 954 1164 1277 1764 2156

    * Maximum permissible non-adiabatic short circuit current as per IEC 949 for both CUW & LEAD sheath

    ** Flat formation with both ends bonded system is not recommended

    Laying Conditions

    - Ground Temperature 35 °C
    - Ground Thermal Resistivity 2.0 K.m/W
    - Laying Depth 1500 mm
     
    - Air Temperature 50 °C
    - Number of Circuits 1 circuit
    - Distance between Conductors (flat) 400 mm
  • 132 kV Cables generally to IEC 60840 and SEC-SOA specification (CUW 40 kA for 3 second)

    CU/XLPE/CUW/LEAD/PE - 132 KV (145 KV) 

    Dimensional Data

    Conductor Cross section Conductor Cross section Diameter of Conductor (approx) Thickness of Insulation (nom) Diameter over Insulation (approx) Thickness of LAT (nom) Thickness of Outer Sheath (nom) Overall Diameter (approx) Weight of Cable (approx)
    [mm²] [mm²]** [mm] [mm] [mm] [mm] [mm] [mm] [kg/km]
    500 430 26.7 18.0 65 2.5 4.50 90 20400
    630 430 30.4 18.0 68.7 2.5 4.50 94 22300
    800 430 33.7 18.0 72 2.5 4.50 97 24500
    1000 * 430 41.0 18.0 79.6 2.5 4.50 105 28000
    1200 * 430 44.0 18.0 82.6 2.5 4.50 108 30100
    1600 * 430 50.0 18.0 88.6 2.5 4.50 114 34400
    2000 * 430 56.0 18.0 94.6 2.5 4.50 120 39200

    * Round Segmental Conductor

    ** Specified screen cross-sectional area of 430 mm² shall withstand 40 kA for 3 sec as per SEC-SOA specs [non-adiabatic]

    Electrical Data

    Conductor Cross Section Parameters Short Circuit Current kA for 1 second Continuous Current Rating [Amperes]
    Rdc at 20°C Rdc at 90°C Inductance (Nominal) mH/km Capacitance (Nominal) Single Circuit in Ground In Free Air & Shaded Area
    Close Trefoil Flat** Close Trefoil Flat**
    [mm²] /km /km Trefoil Flat µF/Km
    Conductor Screen* Both Ends Single/ cross Single/ cross Both Ends Single/ cross Single/ cross
    500 0.0366 0.0499 0.43 0.78 0.16 41.30 40 421 508 583 722 814 924
    630 0.0283 0.0402 0.41 0.75 0.17 52.04 40 455 569 658 804 931 1068
    800 0.0221 0.0333 0.40 0.73 0.18 66.09 40 484 627 733 879 1045 1213
    1000 0.0176 0.0238 0.38 0.69 0.21 82.61 40 537 743 867 1026 1288 1497
    1200 0.0151 0.0209 0.37 0.68 0.22 99.13 40 557 793 932 1084 1394 1635
    1600 0.0113 0.0166 0.35 0.65 0.25 132.17 40 591 886 1061 1191 1601 1918
    2000 0.0090 0.0141 0.34 0.63 0.27 165.22 40 616 955 1165 1276 1772 2166

    * Maximum permissible non-adiabatic short circuit current as per IEC 949 for CUW only.

    ** Flat formation with both ends bonded system is not recommended

    Laying Conditions

    - Ground Temperature 35 °C
    - Ground Thermal Resistivity 2.0 K.m/W
    - Laying Depth 1500 mm
     
    - Air Temperature 50 °C
    - Number of Circuits 1 circuit
    - Distance between Conductors (flat) 400 mm
  • 132 kV Cables generally to IEC 60840 and SEC-SOA specification (CUW+LEAD 40 kA for 3 second)

    CU/XLPE/CUW/LEAD/PE - 132 KV (145 KV) 

    Dimensional Data

    Conductor Cross section Conductor Cross section Diameter of Conductor (approx) Thickness of Insulation (nom) Diameter over Insulation (approx) Thickness of LAT (nom) Thickness of Outer Sheath (nom) Overall Diameter (approx) Weight of Cable (approx)
    [mm²] [mm²]** [mm] [mm] [mm] [mm] [mm] [mm] [kg/km]
    500 364 26.7 20.3 69.8 2.5 4.50 96 20700
    630 364 30.4 20.3 73.8 2.5 4.50 100 22700
    800 359 33.7 20.3 77.1 2.5 4.50 103 24800
    1000 * 354 41.0 20.3 84.4 2.5 4.50 110 28400
    1200 * 354 44.0 20.3 87.4 2.5 4.50 113 30500
    1600 * 349 50.0 20.3 93.4 2.5 4.50 119 34700
    2000 * 344 56.0 20.3 99.4 2.5 4.50 125 39600

    * Round Segmental Conductor.

    ** Specified size of CUW screen along with the LEAD sheath shall withstand 40 kA for 3 sec.

    *** Specified nominal thickness of insulation as per AEIC CS7 as required by SEC-SOA.[for special constructions, screen area may vary slightly]

    Electrical Data

    Conductor Cross Section Parameters Short Circuit Current kA for 1 second Continuous Current Rating [Amperes]
    Rdc at 20°C Rdc at 90°C Inductance (Nominal) mH/km Capacitance (Nominal) Single Circuit in Ground In Free Air & Shaded Area
    Close Trefoil Flat** Close Trefoil Flat**
    [mm²] /km /km Trefoil Flat µF/Km
    Conductor Screen* Both Ends Single/ cross Single/ cross Both Ends Single/ cross Single/ cross
    500 0.0366 0.0498 0.44 0.78 0.15 41.30 40 421 509 581 720 809 910
    630 0.0283 0.0401 0.43 0.75 0.16 52.04 40 455 571 656 804 926 1052
    800 0.0221 0.0331 0.41 0.73 0.17 66.09 40 485 629 731 879 1039 1195
    1000 0.0176 0.0238 0.39 0.69 0.19 82.61 40 536 744 863 1023 1275 1469
    1200 0.0151 0.0208 0.38 0.68 0.20 99.13 40 555 793 928 1081 1380 1605
    1600 0.0113 0.0165 0.36 0.65 0.22 132.17 40 589 886 1056 1188 1586 1881
    2000 0.0090 0.0140 0.35 0.63 0.24 165.22 40 613 956 1159 1273 1756 2123

    * Maximum permissible non-adiabatic short circuit current as per IEC 949 for both CUW & LEAD sheath

    ** Flat formation with both ends bonded system is not recommended

    Laying Conditions

    - Ground Temperature 35 °C
    - Ground Thermal Resistivity 2.0 K.m/W
    - Laying Depth 1500 mm
     
    - Air Temperature 50 °C
    - Number of Circuits 1 circuit
    - Distance between Conductors (flat) 400 mm
  • 220 kV Cables generally to IEC 62067

    CU/XLPE/CUW/LAT/PE - 220 KV (245 KV)

     

    Dimensional Data

     

    Conductor Cross section Conductor Cross section Diameter of Conductor (approx) Thickness of Insulation (nom) Diameter over Insulation (approx) Thickness of LAT (nom) Thickness of Outer Sheath (nom) Overall Diameter (approx) Weight of Cable (approx)
    [mm²] [mm²]** [mm] [mm] [mm] [mm] [mm] [mm] [kg/km]
    630 255 30.4 22.0 77.6 0.2 4.50 95 14200
    800 255 33.7 22.0 80.9 0.2 4.50 99 16200
    1000 * 255 41.0 22.0 88.2 0.2 4.50 106 19100
    1200 * 255 44.0 22.0 91.2 0.2 4.50 109 20900
    1600 * 255 50.0 22.0 97.2 0.2 4.50 115 24800
    2000 * 255 56.0 22.0 103.2 0.2 4.50 121 29200

    * Round Segmental Conductor

    ** 255 mm² CUW screen shall withstand 40.0 kA for 1 second [non-adiabatic], Screen cross-sectional area may vary according to the required short circuit current.

     

    Electrical Data

     

    Conductor Cross Section Parameters Short Circuit Current kA for 1 second Continuous Current Rating [Amperes]
    Rdc at 20°C Rdc at 90°C Inductance (Nominal) mH/km Capacitance (Nominal) Single Circuit in Ground In Free Air & Shaded Area
    Close Trefoil Flat** Close Trefoil Flat**
    [mm²] /km /km Trefoil Flat µF/Km
    Conductor Screen* Both Ends Single/ cross Single/ cross Both Ends Single/ cross Single/ cross
    630 0.0283 0.0402 0.42 0.75 0.15 90.14 40 443 552 637 787 903 1026
    800 0.0221 0.0332 0.40 0.73 0.16 114.47 40 471 608 709 861 1014 1165
    1000 0.0176 0.0238 0.38 0.69 0.18 143.08 40 521 721 836 1005 1249 1433
    1200 0.0151 0.0209 0.37 0.68 0.19 171.70 40 540 770 898 1064 1354 1565
    1600 0.0113 0.0165 0.35 0.65 0.21 228.93 40 572 862 1021 1171 1560 1836
    2000 0.0090 0.0141 0.34 0.63 0.23 286.17 40 594 931 1120 1256 1732 2075

    * Maximum permissible non-adiabatic short circuit current as per IEC 949

    ** Flat formation with both ends bonded system is not recommended.

     

    Laying Conditions

     

    - Ground Temperature 35 °C
    - Ground Thermal Resistivity 2.0 K.m/W
    - Laying Depth 1500 mm

     

    - Air Temperature 50 °C
    - Number of Circuits 1 circuit
    - Distance between Conductors (flat) 400 mm

     

    CU/XLPE/CUW/LEAD/PE - 220 KV (245 KV)

     

    Dimensional Data

     

    Conductor Cross section Conductor Cross section Diameter of Conductor (approx) Thickness of Insulation (nom) Diameter over Insulation (approx) Thickness of LAT (nom) Thickness of Outer Sheath (nom) Overall Diameter (approx) Weight of Cable (approx)
    [mm²] [mm²]** [mm] [mm] [mm] [mm] [mm] [mm] [kg/km]
    630 192 30.4 22.0 77.6 2.5 4.50 101 21700
    800 192 33.7 22.0 80.9 2.5 4.50 105 23900
    1000 185 41.0 22.0 88.2 2.5 4.50 112 27500
    1200 185 44.0 22.0 91.2 2.5 4.50 115 29600
    1600 181 50.0 22.0 97.2 2.5 4.50 121 33900
    2000 169 56.0 22.0 103.2 2.5 4.50 126 38700

    * Round Segmental Conductor

    ** Specified size of CUW screen along with the LEAD sheath shall withstand 40.0 kA for 1 sec [non-adiabatic]. Screen cross-sectional area may vary according to the required short circuit current.

     

    Electrical Data

     

    Conductor Cross Section Parameters Short Circuit Current kA for 1 second Continuous Current Rating [Amperes]
    Rdc at 20°C Rdc at 90°C Inductance (Nominal) mH/km Capacitance (Nominal) Single Circuit in Ground In Free Air & Shaded Area
    Close Trefoil Flat** Close Trefoil Flat**
    [mm²] /km /km Trefoil Flat µF/Km
    Conductor Screen* Both Ends Single/ cross Single/ cross Both Ends Single/ cross Single/ cross
    630 0.0283 0.0401 0.43 0.75 0.15 90.14 40 446 553 639 799 912 1037
    800 0.0221 0.0331 0.41 0.73 0.16 114.47 40 475 609 710 875 1024 1177
    1000 0.0176 0.0238 0.39 0.69 0.18 143.08 40 525 716 836 1022 1255 1446
    1200 0.0151 0.0208 0.38 0.68 0.19 171.70 40 544 763 898 1082 1359 1579
    1600 0.0113 0.0165 0.36 0.65 0.21 228.93 40 577 850 1019 1192 1561 1850
    2000 0.0090 0.0140 0.35 0.63 0.23 286.17 40 602 914 1116 1281 1725 2085

     * Maximum permissible non-adiabatic short circuit current as per IEC 949 for both CUW & LEAD sheath

    ** Flat formation with both ends bonded system is not recommended

     

    Laying Conditions

     

    - Ground Temperature 35 °C
    - Ground Thermal Resistivity 2.0 K.m/W
    - Laying Depth 1500 mm

     

    - Air Temperature 50 °C
    - Number of Circuits 1 circuit
    - Distance between Conductors (flat) 400 mm
    CORRECTION FACTORS

     

    Variation in Laying Depth of Cables
    Laying Depth 
    [m]
    Correction Factor
    0.50 1.19
    0.70 1.13
    0.90 1.08
    1.00 1.06
    1.20 1.03
    1.50 1.00
    1.75 0.98
    2.00 0.96
    2.50 0.93
    Soil Thermal Resistivity
    Soil Thermal Resistivity [K.m/W] Correction factor
    1.0 1.32
    1.2 1.24
    1.5 1.13
    2.0 1.00
    2.5 0.90
    3.0 0.82

     

    Ground Temperature
    Ground Temperature 
    [°C]
    Correction Factor
    5 1.24
    10 1.20
    15 1.17
    20 1.13
    25 1.09
    30 1.04
    35 1.00
    40 0.95
    45 0.90
    50 0.85
    55 0.80
    60 0.74
    Ambient Air Temperature
    Ambient Air Temperature [°C] Correction factor
    5 1.53
    10 1.48
    15 1.43
    20 1.37
    25 1.32
    30 1.25
    35 1.20
    40 1.13
    45 1.07
    50 1.00
    55 0.92
    60 0.84
    Note : The overall accuracy of correction factors is within ± 2%.

     

    Variation in Phase Spacing of Cables*, Single Circuit in flat formation in ground
    Phase Spacing [mm] 200 250 300 400 500
    Correction Factor 0.92 0.95 0.97 1.00 1.02
    * Center to center phase spacing

    Groups of Circuits in Ground in Trefoil Formation
    Distance "cc" between Groups [mm] Number of Groups
    2 3 4 5 6 7 8
    400 0.80 0.69 0.64 0.60 0.58 0.55 0.54
    500 0.82 0.72 0.67 0.62 0.60 0.59 0.57
    800 0.86 0.76 0.72 0.69 0.67 0.65 0.64
    1000 0.87 0.79 0.75 0.72 0.70 0.69 0.68
    1200 0.89 0.81 0.78 0.75 0.74 0.72 0.71
    1500 0.90 0.84 0.81 0.79 0.78 0.77 0.76
    2000 0.93 0.88 0.86 0.84 0.83 0.82 0.81

    Groups of Circuits in Ground in Flat Formation
    Distance "cc" between Groups [mm] Number of Groups
    2 3 4 5 6 7 8
    1250 0.87 0.78 0.75 0.72 0.71 0.69 0.68
    1500 0.89 0.81 0.78 0.75 0.74 0.73 0.72
    2000 0.91 0.85 0.83 0.81 0.8 0.79 0.78
    3000 0.95 0.9 0.89 0.88 0.87 0.86 0.85

    Note : The overall accuracy of correction factors is within ± 3%.