The wire and cable come in different sizes which the specification of each one will change by changing the insulation and size. The 11kv with XLPE or PVC is medium voltage cable that is widely used. Cables for heating, ventilation, and air conditioning (HVAC) are often utilized as an alternate transmission technology when overhead lines cannot be used for various reasons, such as in highly populated and protected areas, over rivers, or offshore. Insulation for extruded cables is created using polyethylene that has been cross-linked (XLPE). Because of advancements in material science, XLPE has reached a high dielectric strength, a low dielectric constant, a high insulation resistance, and strong mechanical qualities. These characteristics combine to make it an effective insulation medium for the subterranean transmission of power. The XLPE cables used in HVAC systems can be divided into two distinct types:
- Cables located on land
- Submarine cables
The number of cores (conductors) that are woven together to make the cable is another way in which each type can be recognized from the others. There may be a single core or three cores configured in its architecture. On a global scale, HVAC cables see widespread use at voltage levels up to a maximum voltage of 550 kV. This is the cable's maximum rating. Since the year 1995, extruded XLPE insulated cables have been utilized at 275 kV, and since about the year 2000, they have been utilized at 400 kV. Extruded insulation cables designed for use with HVAC systems are also frequently utilized for the undersea connections. At present, cables for HVAC systems that have extruded insulation can cover transmission system voltages of up to 550 kV. Components & enablers Cable located on land:
- Materials used for insulating (XLPE)
- A barrier against water
- An outer sheath that is not made of metal
Submarine cable:
- An insulating layer (XLPE)
- The core and sheath (semiconductor)
- Protective armor (galvanized steel wires)
- Outer serving (bitumen and polypropylene yarn)
The benefits, as well as the areas of application The low dielectric loss of XLPE makes it an ideal insulator for medium and high voltage cables. This is the primary benefit of using XLPE. The dielectric loss factor is approximately one-tenth of what it is for cables insulated with paper, and it is approximately one hundred times lower than what it is for cables insulated with PVC. In addition, developments in manufacturing and installation processes have contributed to a significant rise in the use of this kind, which has led to a dramatic increase in its overall prevalence. At least forty years can be expected out of XLPE cables over their lifetime. The greatest temperature that HVAC XLPE can withstand in a short circuit is around 250 degrees Celsius, and it can withstand temperatures as high as 90 degrees Celsius. When adopting HVAC systems that use XLPE cables, there are a few problems that must be overcome. These challenges include long outage durations following damage or failure, transient behavior, and reactive power provided by cables. It is necessary to do in-depth risk assessments on a case-by-case basis for the operation of the network. The Level of Technology Readiness
- TRL 9 for HVAC cables used offshore that have a voltage rating of 245 kV or less, as well as onshore HVAC cables with the same rating
- Technical Requirement Level 7 (TRL 7) for onshore HVAC cables with a voltage rating of 420 kV or more
The Conduct of Research and Development Research is currently being conducted in the following areas: system integration margins due to reactive power compensation; partial discharge detection; fault localization; new environmentally friendly lying methods; bedding materials; 4,000 mm2 conductors; and long term thermal stability of insulating material. Because of the powerful mechanical protection offered by their aluminum wire armour (AWA) for single core cables and their steel wire armour (SWA) for multicore cables, these 11kV cables are appropriate for direct burial in the ground. These armoured MV mains power cables are most often supplied with copper conductors; but, upon request, they can also be delivered with aluminum conductors that are held to the same standard as the copper conductors. The conductors made of copper are stranded, which classifies them as belonging to Class 2, while the conductors made of aluminum comply with the requirement by employing both stranded and solid (Class 1) constructions. 
Eland Cables provided the UK distribution network operators UKPN, SSE, Western Power Distribution (WPD), Northern Power Grid (NPG), Scottish Power Energy Networks (SPEN), and Electricity Northwest with a variety of DNO-approved cables, including voltages of 6.35/11kV. (ENW). These cables are made by a supplier that has been granted G81 approval, and they adhere to the building criteria of each and every individual DNO. Included in this is the 11kV Triplex formation cable that will be used for UKPN. We offer a wide variety of wire and cable with the policy of pricing our products reasonably lower than the global market prices. You can easily contact us and rest assured that you will have a price reasonably lower than the market. So fill out the inquiry form, let us know what you require and we will contact you momentarily.