.png)
| OMPONENTS OF HV CABLES | |||
| Element | Construction / Purpose | Material | Standards |
| Conductor | Stranded compacted circular conductors to carry continous load and short circuit current. |
Compacted stranded – Class 2, Annealed / Plain Copper/Aluminium |
IS:8130 / IEC: 60228 / BS EN 60228 |
| Conductor Screen / Shield |
Conductors for cables rated above 3.3 kV are screened with an extruded layer of semiconducting compound. This eliminates the chance of electrical discharge at the interface between conductor and insulation. | Extruded Semiconducting Compound |
IS:7098-Part 2 / IEC: 60502- Part 2 / BS:6622 / BS:7835 |
| Insulation | The insulation is of natural. Cross Linked Polyethylene with high di-electric strength is extruded over semiconducting conductor screening. Thickness of insulation is as per the relevant tables. | XLPE | IS:7098-Part 2 / IEC: 60502- Part 2 / BS:6622 / BS:7835 |
| Non-metallic Insulation screen | Cables rated above 3.3 kV will have a screening consisting of non metallic part, in combination with a metallic part over the insulation. The non-metallic part of the screening consists of either a semiconducting tape applied helically or a layer of extruded semi-conducting compound or both. The conductor screening, XLPE insulation and the non-metallic part of insulation screening are all extruded in one operation by TRIPLE EXTRUSION which eliminates the formation of micro voids during the extrusion and curing resulting in longer life of cables. | Extruded Semiconducting Compound | IS:7098-Part 2 / IEC: 60502- Part 2 /BS:6622 / BS:7835 |
| Metallic Insulation screen | Bare annealed copper tape / copper wire are applied over insulation screen to carry fault current. | Copper Tape / Wire | IS:7098-Part 2 / IEC: 60502- Part 2 /BS:6622 / BS:7835 |
| Laying up | Insulated cores are laid up together, interstices filled up with non hygroscopic fillers to make the cable circular. The phase identifi cation of three core cable is done either by coloured strips / numbered applied on the cores. | Non Hygroscopic PVC / Polypropylene Fiber |
|
| Inner Sheath | The cable cores are provided with a common covering of extruded PVC/PE sheath or wrapped plastic tapes as per the requirement of the customer. | PVC / Polyethylene / Halogen Free | IS:7098-Part 2 / IEC: 60502- Part 2 /BS:6622 / BS:7835 |
| Armour | GI Round wire / Flat wire (Strip) / Double steel tape armouring is applied over the inner sheath in case of three core cables. The direction of lay of armouring is left hand side of final layer. For single core cables non magnetic armouring is applied over the inner sheath. |
GI / Aluminium – Round wire / Flat strip / Double steel tape / Double Aluminium tape | IS:7098-Part 2 / IS:3975 IEC: 60502- Part 2 /BS:6622 / BS:7835 |
| Outer sheath | The cables are provided with an extruded PVC / PE / LSZH / FR / FRLS outer sheath over the armour. For Single core unarmoured cables the outer sheath is extruded over the non magnetic metallic part of insulation screening. Outer sheath is generally of Black colour, but any other colour as per customer requirement can be provided. | PVC / FR PVC / FRLS PVC / Polyethylene / Halogen Free | IS:7098-Part 2 / IEC: 60502- Part 2 /BS:6622 / BS:7835 |
TYPICAL CROSS SECTIONAL VIEW OF SINGLE CORE & THREE CORE CABLES
LETSGOADS.COM is India’s largest online B2B & B2C marketplace in India where buyers, suppliers and customer in under same umbralla. Letsgoads.com providing a platform to Small & Medium Enterprises (SMEs), Large Enterprises as well as individuals. Mother company BINARY COMPUTER established in 2003, the company’s mission is good service with small cost. Letsgoads.com will assist to you exclusive planning and purchasing activities. Our customer support number is 9073335777 where you can give a phone and get all local business information or pan India business information.
Our service extends from providing address and contact details of business establishments around the country, to making orders and reservations for leisure, medical, financial, travel and domestic purposes. We enlist business information across varied sectors like Hotels, Restaurants, Auto Care, Home Decor, Personal and Pet Care, Fitness, Insurance, Real Estate, Sports, Schools, etc. from all over the country. Holding information right from major cities like Kolkata, Mumbai, Delhi, Bangalore, Hyderabad, Chennai, Ahmedabad and Pune our reach stretches out to other smaller cities across the country too.
Our 'Free Listing' feature gives a platform to display varied specialties. We then furnish you with the information via phone, SMS, web and App as well as, create a space for you to share your experiences or give feedback; we make sure that you are offered the best bargains in the market.