The basic material for XLPE is polyethylene, which is chemically transformed to cross-linked polyethylene (XLPE) through the cross-link reaction of organic peroxides. The cross-link method for polyethylene was developed in the United States during the 1950’s and has since been continuously developed for application to higher voltages. Higher voltages are increasingly being required, and the 500kV XLPE cables have already been commercialized.
Product Features / Benefits:
Plastic insulation is widely used in advanced nations due to its outstanding insulation, easy routing, connectivity and maintenance. Thanks to the development in cross-link technology, XLPE insulation cables can be applied to higher voltages. Recently, XLPE cables have been completely replacing OF cables. The benefits of XLPE are its lightweight, thermal characteristics, low routing costs and low material costs.
Types and Functions:
At present, copper (Cu) and aluminum (Al) are the main materials for XLPE conductors.
(1) Copper (Cu)
Copper (Cu) conductors have advanced electrical features, processability and economic efficiency. Therefore, they are used for the majority of underground conductor materials. Significantly, the purity of electrolytic copper needs to be 99.96%~99.86%.
(2) Aluminum (Al)
As aluminum is about one-third lighter than copper it enables easier handling. Its electrical conductivity is about two-thirds of copper but it is more economical. Because of these features, Al is the most widely used material following copper.
AC submarine cables are widely used for mid-to-long-range application at medium-to-extra high voltage grade. LS Cable & System can offer both single- as well as three-phase AC cables. They can be easily connected to the onshore AC power grid. Commonly, extruded cross-linked polyethylene (XLPE) is used as conductor insulation for reliable operation and maintenance, simple connection and repair, and due to its advanced chemical and electrical features.
Product Features / Benefits:
LS Cable & System has the capability to produce long-length AC submarine cables (without the need to joint two lengths offshore), as the company possesses facilities and technology required to manufacture, factory-joint, layup (three cores), and store long-length MV and (E)HV AC submarine cables. XLPE insulated submarine cables hold many benefits, most notably, there is no risk of environmental contamination, as is given when an oil-insulation based cable is damaged.
- Mid-to-long-distance transmission (≤100km)
- Maximum voltage: 400kV
- Maximum conductor size: 2,500mm2 (single core)
Types and Functions:
Submarine cables for power connection
- Connection among countries
- Connection between islands and mainland
Submarine cables for power connection
- Connection among countries
- Connection between islands and mainland
- Submarine cables for wind power
- External network submarine energy cables (offshore substation toonshore substation)
- Internal network submarine energy cables (between offshore wind turbine power generators and -offshore or onshore substation) (these are referred to as “infield” or “array” cables).
- Oil & Gas
- Internal network submarine energy cable (between offshore oil & gas platforms)
HCC, or High Capacity Conductors are new high-capacity, high-efficiency cables, when greater power supply is required compared to ACSR. Such cables provide a solution for increased power demand and high-capacity power transmission by using new materials and technology. HCC provides the optimum solution for various environments including urban, salty regions and long-span transmission sections.
Product Features / Benefits:
High temperature conductors consist of central tension cables such as extra-high-strength steel, aluminum-clad steel and aluminum-clad invar. Such conductors consist of a heat resistant aluminum conductor layer with a maximum continuous temperature of 150°C~230°C enabling the transmission of 1.5~2 times larger current compared to ACSR. Thus, installation time and costs can be dramatically reduced by replacing the ACSR with high temperature conductors that increase current capacity instead of expanding new cables. Doing so provides various solutions for urban and salinated areas and long-span transmission sections. STACIR, XTACIR, GSTACSR, ACSS, Composite Core(LSCC) cables are also known as high-temperature low-sag conductors(HTLSC) and enable high temperature and low sag for cables with limited sag without reinforcing steel towers.
Types and Functions:
TACSR/AW
- Transmission lines for urban, salinated, humid areas, etc.
- Current capacity: 1.5 times larger than ACSR
- Hi-TACSR/AW
- Current capacity: 1.5 times larger than ACSR
- Hi-TACSR/EST
- Current capacity: 1.5 times larger than ACSR
- STACIR/AW, Hi-STACIR/AW
- Current capacity: Two times larger than ACSR
- XTACIR/AW
- Current capacity: 2.1 times larger than ACSR
- GSTACSR
- Current capacity: Two times larger than ACSR
- ACSS/MA(GA)
- Current Capacity : Two times larger than ACSR at elevated temperatures up to 250°C
- Composite Core Conductor (LSCC)
- Current Capacity : Two times larger than ACSR at elevated temperatures up to 180°C
Optical ground wire, or OPGW, includes communication functions provided by the incorporated optical fibers in addition to the existing overhead ground wire which protects the transmission cables from lightning strikes and secures current flow in case of cable faults.
Product Features / Benefits:
Minimized OPGW external diameter for optimized structure design (No. of optical fiber cores: maximum 144)
- Maintains stable optical fiber performance in a wide temperature range (-40°C ~ +85°C)
- Protects optical fibers from severe environmental changes such as lightning strikes and short circuit currents
- The jelly compound prevents water penetration of the optical fiber
Types and Functions:
It is used for optical communications, to protect transmission lines from fault currents (inflow of currents in the case of power system faults), and lightning. Please find the product range as follows, according to the optical fiber set unit(tube) structure.
- Plastic Loose Tube Type OPGW
- Stainless Steel Loose Tube Type OPGW
LS Cable & System E-series Bus duct can be used for applications carrying up to AC 1000V and currents from 630A to 7500A. When connected using a joint kit the connected surface is very large thus minimizing contact resistance, and basically IP54 level can be realized. It can be produced in both exterior and interior IP65 configuration, and interior IP42 according to application requirements. The E-series is classified into three types according to insulation: Ez/Ex/Ef-way. As an option, a single-bolt structure is feasible whereby the connector conductor connects directly without a joint kit.
Product Features / Benefits:
The aluminum enclosure boasts high thermo-diffusional efficiency. It is lightweight, therefore easy to install, and does not require much space. Load divergence is feasible through the plug-in box installed on the Bus duct enabling simplification of the power system. Safety has been enhanced through earthquake and explosion proof features, and management is convenient due to the application of temperature and power monitoring systems.
Types
- Ez-way
- Ef-way
- Mica film insulator
- Ex-way
- Class F and Fire-retardant properties available as an option
Description:
The construction of SF6 gas insulated termination is based on stress relief cone and epoxy resin housing. There are mechanical devices to maintain interface pressure for dry type and embedded insulating plate to isolate between cable sheath and GIS chamber thereby not requiring an oil reservoir as additional maintenance expenses. without oil reservoir for maintenance free. The dry type could be easily installed in any position. The SVL(Sheath Voltage Limiter) can be installed to protect epoxy insulating plate from switching impulse. The main insulation components are fully examined and tested in the factory. Design and scope of supply are fully complying with IEC 60859 and IEC 62271-209 and possibly adjusted to various needs of customers such as plug-in type.
The construction of SF6 gas insulated termination is based on stress relief cone and epoxy resin housing. There are mechanical devices to maintain interface pressure for dry type and embedded insulating plate to isolate between cable sheath and GIS chamber thereby not requiring an oil reservoir as additional maintenance expenses. without oil reservoir for maintenance free. The dry type could be easily installed in any position. The SVL(Sheath Voltage Limiter) can be installed to protect epoxy insulating plate from switching impulse. The main insulation components are fully examined and tested in the factory. Design and scope of supply are fully complying with IEC 60859 and IEC 62271-209 and possibly adjusted to various needs of customers such as plug-in type.
Product Features / Benefits:
They are currently available to the maximum allowable cable conductor size of 2500mm2
- For all types of XLPE insulated cables
- Conventional & Plug-in both available
- All dimension can be customized for existing system
- Without Pressurizing & Monitoring
- Easy adaptation for all GIS types
- Maintenance-free after installation
Description:
LS outdoor termination is based on pre-molded silicone rubber sleeve designed to fit with controlled interference over the cable insulation and able to follow the cable size variations with sufficient positive pressure to control the electrical stress by elastic retention of silicone material itself. The termination is filled with polybutene oil up to optimized level where the electric stress is substantially reduced thereby
not requiring an oil reservoir or monitoring system as additional maintenance expenses. The termination base plate and the cable’s metallic sheath are electrically insulated from the supporting structure by means of stand off insulators designed to withstand both mechanical and electrical stresses in services. Either porcelain or polymer hollow insulator can be supplied depending upon requests.
LS outdoor termination is based on pre-molded silicone rubber sleeve designed to fit with controlled interference over the cable insulation and able to follow the cable size variations with sufficient positive pressure to control the electrical stress by elastic retention of silicone material itself. The termination is filled with polybutene oil up to optimized level where the electric stress is substantially reduced thereby
not requiring an oil reservoir or monitoring system as additional maintenance expenses. The termination base plate and the cable’s metallic sheath are electrically insulated from the supporting structure by means of stand off insulators designed to withstand both mechanical and electrical stresses in services. Either porcelain or polymer hollow insulator can be supplied depending upon requests.
Product Features / Benefits:
They are currently available to the maximum allowable cable conductor size of 2500mm2
- For all types of XLPE insulated cables
- Porcelain & Polymer both available
- Without Pressurizing & Monitoring
- Configurable creepage distance design
- Self- supported type design
- Maintenance free after installation
Description:
The single piece pre-molded joint is based on silicone insulation embedded with two semi-conductive deflectors and one HV electrode. Without mechanical devices, the interface pressure is safely maintained with elastic retention of material itself.
Upon condition of the installation outer protective casing are designed especially. For sheath sectionalizing, proper insulating layers would be included to disconnect between phases. The main insulation and components are fully examined and tested in the factory. The simplified design along with easy and smart installation meets the various needs of customers.
Product Features / Benefits:
They are currently available to the maximum allowable cable conductor size of 2500mm2
- For all types of XLPE insulated cables
- One piece pre-molded joint based on SIR
- Optimized outer casing solutions
- Transition free for Al to Cu conductor cable
- Easy Installation for all laying condition
- Maintenance free after installation
- Diversion free for differential cable size
Powered by
MakeWebEasy.com