Single Core Cables To IEC 60502

Single Core Medium Cable to IEC 60502-2 Application: The single core cables are designed for distribution of electrical power with nominal voltage Uo/U ranging from 1.8/3KV to 26/35KV and frequency 50Hz. They are suitable for installation mostly in power supply stations,Website:http://www.ue-cable.com, indoors and in cable ducts, outdoors, underground and in water as well as for installation on cable trays for industries, switchboards and power stations. Standards: IEC 60502 Part 1(1.8/3KV)IEC 60502 Part 2(3.6/6KV to 18/30KV Conductor: Plain annealed copper or aluminium complying with IEC 60228/BS 6360. Copper conductors shall be stranded (class 2) and aluminium conductors shall be either solid or stranded (class 2). Conductor Screen: The conductor screen consists of an extruded layer of non metallic, semi-conducting compound firmly bonded to the insulation to exclude all air voids. The conductor screen is not necessary for both PVC and EPR/HEPR insulated 1.8/3KV and 3.6/6KV cables. Insulation: Insulation is of polyvinyl chloride (PVC) intended for 1.8/3KV and 3.6/6KV cables, cross-linked polyethylene compound (XLPE) or ethylene propylene rubber (EPR/HEPR). Table 1. Insulation Thickness Of XLPE Or EPR/HEPR Insulation      Nom. CrossSection Area Insulation Thickness at Nominal Voltage 1.8/3KV (Um=3.6KV) 3.6/6KV        (Um=7.2KV) 6/10KV (Um=12KV) 8.7/15KV (Um=17.5KV) 12/20KV (Um=24KV) 18/30KV (Um=36KV) 21/35KV (Um=42KV) 26/35KV (Um=42KV) mm2 mm mm mm mm mm mm mm mm XLPE/EPR XLPE EPR XLPE/EPR XLPE/EPR XLPE/EPR XLPE/EPR XLPE/EPR XLPE/EPR Unscreened Screened 10 2.0 2.5 3.0 2.5 - - - - - - 16 2.0 2.5 3.0 2.5 3.4 - - - - - 25 2.0 2.5 3.0 2.5 3.4 4.5 - - - - 35 2.0 2.5 3.0 2.5 3.4 4.5 5.5 - - - 50 – 185 2.0 2.5 3.0 2.5 3.4 4.5 5.5 8.0 9.3 10.5 240 2.0 2.6 3.0 2.6 3.4 4.5 5.5 8.0 9.3 10.5 300 2.0 2.8 3.0 2.8 3.4 4.5 5.5 8.0 9.3 10.5 400 2.0 3.0 3.0 3.0 3.4 4.5 5.5 8.0 9.3 10.5 500 - 1600 2.2-2.8 3.2 3.2 3.2 3.4 4.5 5.5 8.0 9.3 10.5 *Insulation Thickness of PVC is 3.4mm (1- 1600mm sq) for 3.6/6KV cables. Insulaton Screen: The insulation screen consists of an extruded layer of non metallic, semi- conducting compound extruded over the insulation. The extruded semi-conducting layer shall consist of bonded or cold strippable semi-conducting compound capable of removal for jointing or terminating. As an option, a semi-conducting tape may be applied over the extruded semi-conducting layer as a bedding for the metallic layer. The minimum thickness is 0.3 mm and the maximum resistivity is 500 Ohm-m at 90°C. The screen is tightly fitted to the insulation to exclude all air voids and can be easily hand stripped on site. The insulation screen is not necessary for both PVC and EPR/HEPR insulated 1.8/3KV and 3.6/6KV cables. The screen may be covered by semi-conductive water blocking swellable tape to ensure longitudinal watertightness.Metallic Layer: The metallic layer may be applied over the individual cores or the core assembly collectively.The following types of metallic layers are provided:1) Metallic Screen2) Concentric Conductor3) Metallic Sheath4) Metallic armourThe metallic screen shall consist of either copper tapes or a concentric layer of copper wires or a combination of tapes and wires to provide an earth fault current path. The concentric conductor is applied directly either over the insulation, or over the insulation screen or over an inner covering. The metallic sheath consists of lead or lead alloy applied as a tightly fitting seamless tube. The metallic armour consists of either flat wire armour, round wire armour, and double tape armour. Table 2. Minimum Total Cross Section Of Metallic Screen Nom. Cross-Section Area of Cable Min. Cross-Section of Metallic Screen DC Resistance of the Copper Wire Screen mm² mm² mm up to 120 16 1.06 150-300 25 0.72 400-630 35 0.51 800-1000 50 0.35 Separation Sheath (for armoured cable): The separation sheath comprises a layer of extruded PVC, PE or LSZH, applied under the armour .The nominal thickness is calculated by 0.02Du + 0.6mm where Du is the fictitious diameter under the sheath in mm. For cables without a lead sheath, the nominal separation sheath thickness shall not be less than 1.2mm. For cables where the separation sheath is applied over the lead sheath, the nominal separation sheath thickness shall not be less than 1.0mm.Lapped Bedding (for armoured lead sheathed cable): The lapped bedding consists of either impregnated/synthetic compounded paper tapes or a combination of two layers of these paper tapes followed by a few layers of compounded fabulous materials. The thickness is around 1.5mm.Armour (for armoured cable): The armour consists of round aluminium wire armour applied helically over an extruded separation sheath.Table 3. Round Armour Wire Diameter  Fictitious Diameter Under the Armour Armour Wire Diameter mm mm > << p="">< - 10 0.8 10 15 1.25 15 25 1.6 25 35 2.0 35 60 2.5 60 - 3.15 Over Sheath: Overall sheath comprises a layer of extruded thermoplastic compound (PVC, PE or LSZH can be offered as an option.) or elastomeric compound (polychlorprene CSP or chlorosulfonated PE). The nominal oversheath thickness is calculated by 0.035D+1 where D is the fictitiuous diameter immediately under the oversheath in mm. For unarmoured cables and cables with the oversheath not applied over the armour, metallic screen or concentric conductor, the nominal oversheath thickness shall not be less than 1.4mm. And for cables with oversheath applied over the armour, metallic screen or concentric conductor, the nominal oversheath thickness shall not be less than 1.8mm.PHYSICAL PROPERTIES:Operating Temperature: up to 70°C (PVC insulation); up to 90°C (XLPE or EPR insulation)Temperature Range: -5°C ( PVC sheath ); -20°C ( PE sheath )Short Circuit Temperature( 5 seconds maximum duration ): 140-160°C (PVC insulation);250°C (XLPE or EPR insulation)Bending Radius: 12 x ODTable 4. Nominal /Operating /Testing Voltages Rated Voltage Uo/U Operating Voltage (Um) Testing Voltage (rms) 1.8/3KV 3.6KV 6.5KV 3.6/6KV 7.2KV 12.5KV 6/10KV 12KV 21KV 8.7/15KV 17.5KV 30.5KV 12/20KV 24KV 42KV 18/30KV 36KV 63KV 21/35KV 42KV 73.5(53)*KV 26/35KV 42KV 91(65)*KV *21/35KV and 26/35kV power frequency voltage test can be made under the following conditions: 2.5Uo x 30mins or 3.0Uo x 15mins. Numbers in brackets refer to the test values for 3.0Uo x 1.5mins.Single Core 1.8/3KV (Um=3.6KV) Dimensional Data Nom. Cross-Section Area Unarmoured Cables Steel Wire Armoured Cables Nom. Insulation Thickness Copper Tape Thickness Copper Wire Screen Area* Nom. Sheath Thickness Approx. Overall Diameter Approx. Weight Nom. Bedding Thickness Armour Wire Size Nom. Sheath Thickness Approx. Overall Diameter Approx. Weight CU AL CU AL mm2 mm mm mm2 mm mm kg/km mm mm mm mm kg/km 10 2.0 0.1 16 1.8 13 240 180 1.2 1.6 1.8 18 460 400 16 2.0 0.1 16 1.8 13 300 200 1.2 1.6 1.8 19 530 430 25 2.0 0.1 16 1.8 15 410 250 1.2 1.6 1.8 20 650 500 35 2.0 0.1 16 1.8 16 510 300 1.2 1.6 1.8 21 780 560 50 2.0 0.1 16 1.8 17 640 350 1.2 1.6 1.8 22 930 640 70 2.0 0.1 16 1.8 19 850 440 1.2 1.6 1.8 24 1170 750 95 2.0 0.1 16 1.8 20 1130 540 1.2 1.6 1.8 26 1460 870 120 2.0 0.1 16 1.8 22 1370 630 1.2 1.6 1.8 27 1730 990 150 2.0 0.1 25 1.8 23 1650 730 1.2 1.6 1.8 29 2030 1110 185 2.0 0.1 25 1.8 25 2010 860 1.2 1.6 1.9 30 2430 1280 240 2.0 0.1 25 1.8 27 2570 1050 1.2 1.6 2.0 33 3040 1530 300 2.0 0.1 25 1.8 29 3160 1250 1.2 2.0 2.1 36 3760 1860 400 2.0 0.1 35 1.9 33 3980 1560 1.2 2.0 2.2 39 4660 2230 500 2.2 0.1 35 2.1 35.5 4910 1905 1.3 2.5 2.5 43 5930 2930 630 2.4 0.1 35 2.2 39.7 6340 2420 1.4 2.5 2.6 49 7370 3430 800 2.6 0.1 50 2.3 44.5 7890 2980 1.4 2.5 2.7 52 9070 4230 1000 2.8 0.1 50 2.5 49.4 9890 3700 1.5 2.5 2.9 56 11100 4950 *Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as standard.Electrical Data Nom. Cross-Section Area D C Resistance CU / AL A C Resistance CU / AL Short Circuit Rating of Conductor CU / AL1 sec Capaci-tance Charging Current Short Circuit Rating of Copper Wire Screen1 sec Short Circuit Rating of Copper Tape Screen1 sec Reactance Inductance Impedance Trefoil Flat Spaced Trefoil Flat Spaced Trefoil Flat Spaced cu AL cu AL mm2 μΩ/m μΩm kA pF/m mA/m kA kA μΩ/m nH/m μΩ/ m μΩ/ m 10 1830/3080 2330/3920 1.4/0.9 182 0.27 2.6 0.2 151 201 384 558 2332 3846 2332 3840 16 1150/1910 1460/2420 2.2/1.4 201 0.29 2.6 0.3 140 193 362 546 1462 2411 1478 2420 25 727/1200 927/1538 3.6/2.3 222 0.32 2.6 0.3 131 185 345 535 936 1544 952 1554 35 524/868 668/1113 5.0/3.2 251 0.35 2.6 0.4 122 178 327 524 679 1121 695 1131 50 387/641 494/822 6.8/4.4 281 0.39 2.6 0.4 116 172 313 514 511 834 527 844 70 268/443 343/568 9.8/6.3 341 0.45 2.6 0.5 110 165 300 495 364 583 386 597 95 193/320 248/410 13.3/8.5 397 0.50 2.6 0.5 104 160 287 485 272 427 300 446 120 153/253 196/325 17.2/11.0 430 0.55 2.6 0.6 104 159 283 480 225 345 257 367 150 124/206 159/266 21.2/13.5 464 0.59 4.3 0.6 100 156 280 475 193 287 229 313 185 99.1/164 128/211 26.6/17.0 513 0.65 4.3 0.7 98 154 274 465 165 237 206 267 240 75.4/125 98/161 34.9/22.3 573 0.70 4.3 0.9 94 150 267 459



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