EHV XLPE CABLES CDCC LINE

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1 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 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.

2 CONSTRUCTION AND SPECIFICATION OF EHV XLPE CABLES Conductor The conductor shall be composed of plain copper or aluminum wires complying with IS:8130, IEC 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

3 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) Nominal Cond. Area. Sq mm /66 KV Nominal Insulation thickness Nominal overall cable dia Approx. weight In Ground In Air /110 KV Nominal Insulation thickness Nominal overall cable dia Approx. weight In Ground In Air /132 KV Nominal Insulation thickness Nominal overall cable dia Approx. weight In Ground In Air

4 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) Nominal Cond. Area. Sq mm /66 KV Nominal Insulation thickness Nominal overall cable dia Approx. weight In Ground In Air /110 KV Nominal Insulation thickness Nominal overall cable dia Approx. weight In Ground In Air /132 KV Nominal Insulation thickness Nominal overall cable dia Approx. weight In Ground In Air

5 ELECTRICAL PARAMETERS OF HVP VIDYUT XLPE INSULATED EHV CABLES Nominal Cond. Area. Sq mm MAX. D.C. RESISTANCE OF EACH CONDUCTOR AT 20 C Single & Multi Core Ohm/km Aluminium Conductor Copper Conductor MAX. RESISTANCE OF CONDUCTOR AT OPERATING TEMPERATURE 90 C Single & Multi Core Ohm/km Aluminium Conductor Copper Conductor CAPACITANCE PER KM OF CABLE IN MICROFARADS 38/66 KV /110 KV /132 KV SHORT CIRCUIT RATING OF CABLE ONE SECOND (KA) Aluminium Conductor Copper Conductor 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

6 RATING FACTORS FOR VARIATION IN TEMPERATURES TEMPERATURES C Rating Factor when cable laid in Ground Rating Factor when Cables laid in Air RATING FACTORS FOR VARIATION IN DEPTH OF LAYING IN GROUND Depth of Laying cm and above Rating Factor for voltage grade RATING FACTORS FOR VARIATION IN THERMAL RESISTIVITY OF SOIL THERMAL RESISTIVITY OF SOIL(0C cm/w) RATIING FACTOR