PROFILE THE HINDUSTHAN VIDYUT PRODUCTS LIMITED, established in the year 1959 is a leading manufacturer of Overhead Conductors and Underground Cables. The Company at its Faridabad Works has sophisticated Stranding Machine from BAGER & Co. DENMARK, Extrusion Lines from MAILLEFER SWITZERLAND, NOKIA FINLAND & TROESTER GERMANY, Drum Twister from POURTIER FRANCE. The Company has unique CDCC (Completely Dry Cure & Cooled) XLPE Line from NOKIA FINLAND for manufacturing Cables upto 132 KV. The Test Laboratory has latest imported equipments such as Impulse Generator from HIPOTRONICS, USA., P.D. Test Equipments from ROBINSON, UK and Tan Delta Measurement Equipment from TETTEX, SWITZERLAND. It is the strict adherence to high quality and on time delivery that has brought the Company name as reliable quality supplier. THE HINDUSTHAN VIDYUT PRODUCTS LIMITED, has created a reputation for its quality product and have been awarded ISO 9001:2008 Certificate by Bureau Veritas Quality International (BVQI), U.K. The company has also exported large quantity of Cables and Over Head Conductor to various Countries such as SOUTH AFRICA, KENYA, BANGLADESH, TRINIDAD, SRILANKA, TANZANIA, MAURITIUS, ZIMBABWE, UGANDA, NEPAL & DUBAI etc. PRODUCT RANGE EHV XLPE CABLES Because of Excellent Thermal, Mechanical and Electrical Properties EHV XLPE Cables are being used extensively through out the world to transmit large power by various utilities and at Power Stations, Industrial Plants, Chemical, Fertilizer & Heavy duty Industries. CDCC LINE The company has most modern Complete Dry Curing and Dry Cooled (CDCC) Line from M/s Nokia Maillefer, Finland. The unique feature of this Line is its rotating Caterpillar giving uniform thickness throughout running of the Line. Further, the Line has both Curing and Cooling section as Catenary which ensures excellent centre of the core during extrusion throughout running of the Line. (First of its kind in India) - The CDCC Line is fully automatic with a Close Loop feeding system without any manual touch. The feeding system is enclosed in a pressurized room having Hepa Filters which ensures dust free environment of feeding system. - The Line is equipped with automatic motorized proportionate valve for heating/cooling of the Extruders which ensure that the temperature during running of the Line is in the accuracy of + 0.5 o C. - A True Triple Cross Head Extrusion (common for all the three layers), i.e. Conductor screening, main insulation and insulation screening. Triple Cross Head ensures prefect interlayer bonding of the material and removes any possibility of void formation as compared to Dual Cross Head system. HV & EHV XLPE Power Cables upto 132 KV. LT XLPE Power & Control Cables. PVC Power Cables from 1.1 KV to 6.6 KV. PVC Control Cables upto 61 Cores. FRLS Cables (Power & Control). HR PVC Cables to withstand 85 C. Mining Cables. Railway Signaling Cables. Shielded Instrumentation Cables. Aerial Bunched Cables (ABC) upto 33 KV Grade. Special Cables to Customer s Specification. AAC, ACSR, AAAC, AACSR Over Head Conductor upto 800 KV Lines. - The Curing Tube is heated through induction heating with individual Zones (total 8 zones) being connected to inductive low voltage High Ampere Transformer. This unique feature of heating is first of its kind in India. This system ensures far better curing as compared to conventional CCV Line. Cables produced with above CDCC Line offer following advantages. Cables are free from Micro voids and water trees. Higher AC breakdown strength. Higher impulse breakdown strength. Excellent service reliability.
CONSTRUCTION AND SPECIFICATION OF EHV XLPE CABLES Conductor The conductor shall be composed of plain copper or aluminum wires complying with IS:8130, IEC 60228 or any other International Specification. The conductor shall be stranded compacted circular, or segmental compacted circular. Segmental compacted circular conductors shall be applied to cables of conductor nominal cross-sectional areas of 1200 mm 2 and above. Conductor Shielding Conductor shielding of an extruded semi-conducting thermosetting compound applied over the conductor. One or two layer of semi- conducting tape(s) may be applied with a proper lapping between the conductor and the extruded semiconducting layer. Insulation The insulation shall be of dry-cured super clean XLPE compound with a thickness to meet dimensional, electrical and physical requirements specified as per relevant National or International Specification. Insulation Shielding The insulation shielding shall be applied directly over the insulation and shall consist of extruded semi-conducting compound. Further a layer of semiconducting tape is also provided. Matallic Layer The metallic layer shall be of copper tape / copper wires covered with plastic laminated aluminium tape or alternatively with corrugated aluminium sheath which is applied to meet desired short circuit parameters. Use of lead sheath, earlier very popular, is now being discouraged world over due to pollution related & extra weight handling issues. Moisture Barrier Longitudinal Moisture Barrier protection is provided by S.C. water swellable tape whereas radial moisture barrier protection is provided either by plastic laminated metal tape or corrugated aluminium sheath or lead alloy sheath. Inner Sheath Inner sheath shall be of PVC Compound or thermoplastic polyethylene compound. Armour Armour shall be of non magnetic metallic wires. Outer Sheath The outer Sheath shall consist of thermoplastic PVC / PE compound extruded continuously over the metallic layer or moisture barrier or armour. A layer of bituminous compound shall be applied under the outer sheath to protect the metallic sheath (Corrugated aluminium sheath / lead sheath) against corrosion. A layer of conductive coating is applied to check integrity of outer sheath at site. Copper Wire Shielded Cables with Plastic Laminated Metal Tape Corrugated Aluminum Sheathed Cable
CONSTRUCTIONAL AND OTHER DETAILS OF HVP VIDYUT EHV XLPE (ALU. CONDUCTOR) STRANDED CIRCULAR COMPACTED ALUMINIUM CONDUCTOR, SCREENED WITH EXTRUDED S.C. COMPOUND, SUPER CLEAN XLPE INSULATION, INSULATION SCREEN BY EXTRUDED S.C. COMPOUND (ALL THREE LAYER EXTRUDED IN ONE OPERATION I.E. TRIPLE EXTRUSION PROCESS DRY CURED & DRY COOLED IN NITROGEN ATMOSPHERE) FOLLOWED BY S.C. TAPE, COPPER WIRE / TAPE SCREENED COVERED BY S.C. WATER SWELLABLE TAPE & PLASTIC COATED ALUMINIUM TAPE FOR LONGITUDINAL AND RADIAL WATER PROTECTION, EXTRUDED POLYETHYLENE INNER SHEATH, HARD DRAWN AND OVERALL PVC SHEATHED SINGLE CORE CABLES TO IS: 7098 (PART - 3)-1993. Nominal Cond. Area. Sq mm 95 120 150 185 240 300 400 500 630 800 1000 38/66 KV Nominal Insulation thickness 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 Nominal overall cable dia 51.0 53.0 55.0 58.0 60.0 62.0 66.0 69.0 75.0 79.0 84.0 Approx. weight 2700 2900 3300 3600 3900 4300 4900 5400 6400 7300 8400 In Ground 195 220 240 275 320 360 410 460 525 590 650 In Air 240 280 335 380 450 510 595 690 800 910 1010 64/110 KV Nominal Insulation thickness 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 Nominal overall cable dia 67.0 69.0 73.0 75.0 78.0 81.0 85.0 92.0 97.0 Approx. weight 3900 4100 5500 5900 6600 7200 8000 9500 10600 In Ground 235 270 315 355 405 460 520 580 640 In Air 330 375 445 505 590 680 790 900 1000 76/132 KV Nominal Insulation thickness 18.0 18.0 18.0 18.0 18.0 18.0 18.0 18.0 Nominal overall cable dia 75.0 77.0 79.0 83.0 86.0 91.0 96.0 101.0 Approx. weight 5800 6100 6500 7200 7800 8700 10100 11300 In Ground 265 310 355 405 455 515 575 635 In Air 370 440 500 585 670 775 885 995
CONSTRUCTIONAL AND OTHER DETAILS OF HVP VIDYUT EHV XLPE (CU. CONDUCTOR) STRANDED CIRCULAR COMPACTED COPPER CONDUCTOR, SCREENED WITH EXTRUDED S.C. COMPOUND, SUPER CLEAN XLPE INSULATION, INSULATION SCREEN BY EXTRUDED S.C. COMPOUND (ALL THREE LAYER EXTRUDED IN ONE OPERATION I.E. TRIPLE EXTRUSION PROCESS DRY CURED & DRY COOLED IN NITROGEN ATMOSPHERE) FOLLOWED BY S.C. TAPE, COPPER WIRE / TAPE SCREENED COVERED BY S.C. WATER SWELLABLE TAPE & PLASTIC COATED ALUMINIUM TAPE FOR LONGITUDINAL AND RADIAL WATER PROTECTION, EXTRUDED POLYETHYLENE INNER SHEATH, HARD DRAWN AND OVERALL PVC SHEATHED SINGLE CORE CABLES TO IS: 7098 (PART - 3)-1993. Nominal Cond. Area. Sq mm 95 120 150 185 240 300 400 500 630 800 38/66 KV Nominal Insulation thickness 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 11.0 Nominal overall cable dia 51.0 53.0 55.0 58.0 60.0 62.0 66.0 69.0 75.0 79.0 Approx. weight 3300 3600 4200 4700 5300 6100 7200 8500 10400 12300 In Ground 251 280 315 360 410 460 520 580 650 715 In Air 310 370 430 490 585 655 750 855 970 1100 64/110 KV Nominal Insulation thickness 16.0 16.0 16.0 16.0 16.0 16.0 16.0 16.0 Nominal overall cable dia 67.0 69.0 73.0 75.0 78.0 81.0 85.0 92.0 Approx. weight 4800 5200 7000 7700 8900 10150 11900 14400 In Ground 300 355 405 455 515 575 645 710 In Air 420 480 575 650 745 845 965 1090 76/132 KV Nominal Insulation thickness 18.0 18.0 18.0 18.0 18.0 18.0 18.0 Nominal overall cable dia 75.0 77.0 79.0 83.0 86.0 91.0 96.0 Approx. weight 6800 7500 8300 9500 10800 12500 15000 In Ground 350 400 450 510 570 640 700 In Air 475 570 645 740 835 960 1080
ELECTRICAL PARAMETERS OF HVP VIDYUT XLPE INSULATED EHV CABLES Nominal Cond. Area. Sq mm 95 120 150 185 240 300 400 500 630 800 1000 MAX. D.C. RESISTANCE OF EACH CONDUCTOR AT 20 C Single & Multi Core Ohm/km Aluminium Conductor 0.320 0.253 0.206 0.164 0.125 0.100 0.0778 0.0605 0.0469 0.0367 0.0291 Copper Conductor 0.193 0.153 0.124 0.0991 0.0754 0.0601 0.0470 0.0366 0.0283 0.0221 MAX. RESISTANCE OF CONDUCTOR AT OPERATING TEMPERATURE 90 C Single & Multi Core Ohm/km Aluminium Conductor 0.410 0.325 0.265 0.211 0.162 0.130 0.1023 0.0808 0.0648 0.053 0.0444 Copper Conductor 0.248 0.197 0.161 0.129 0.0993 0.0806 0.0608 0.0525 0.0433 0.0363 CAPACITANCE PER KM OF CABLE IN MICROFARADS 38/66 KV 0.129 0.138 0.147 0.157 0.169 0.181 0.198 0.216 0.237 0.262 0.285 64/110 KV -- -- 0.117 0.124 0.133 0.143 0.156 0.167 0.183 0.200 0.216 76/132 KV -- -- -- 0.116 0.124 0.132 0.145 0.155 0.168 0.184 0.198 SHORT CIRCUIT RATING OF CABLE ONE SECOND (KA) Aluminium Conductor 8.93 11.3 14.1 17.4 22.6 28.2 37.6 47.0 59.2 75.2 94.0 Copper Conductor 13.6 17.2 21.5 26.5 34.3 42.9 57.2 71.5 90.1 114.4 STANDARD CONDITIONS OF INSTALLATION (i) Max Conductor Temperature 90 C (ii) Thermal Resistivity of Soil 150 C cm/watt (iii) Thermal Resistivity of PVC 650 C cm/watt (iv) Ambient Air Temperature 40 C (v) Ground Temperature 30 C (vi) Standard depth of laying 1050 mm Cables
RATING FACTORS FOR VARIATION IN TEMPERATURES TEMPERATURES C 15 20 25 30 35 40 45 50 Rating Factor when cable laid in Ground 1.12 1.08 1.04 1.00 0.96 0.91 0.87 0.82 Rating Factor when Cables laid in Air -- -- 1.14 1.10 1.05 1.00 0.95 0.89 RATING FACTORS FOR VARIATION IN DEPTH OF LAYING IN GROUND Depth of Laying cm 105 120 150 180 and above Rating Factor for voltage grade 1.00 0.99 0.98 0.96 RATING FACTORS FOR VARIATION IN THERMAL RESISTIVITY OF SOIL THERMAL RESISTIVITY OF SOIL(0C cm/w) 100 120 150 200 250 300 RATIING FACTOR 1.18 1.08 1.00 0.88 0.81 0.74