BLL Overhead Line Covered Conductor
Ritelite is the UK distributor of BLL covered conductor. Manufactured by Amokabel in Sweden, Ritelite has been supplying BLL to UK DNO’s for over 15 years. Manufactured to BS EN 50397-1, BLL conductor is a unique uncompacted covered conductor designed to operate without problems with vibration, tracking or slipping of covering.
Product Description / Technical InformationBLL conductor uses a triple extruded polyethylene covering consisting of a semi conducting layer, a clear insulating layer and a coloured UV stable layer. It is designed with integrated longitudinal water tightness through the addition of a polyethylene filler between the strands during production which ensures that the covering does not slip during use and no grease is required during the production of this conductor.
SpecificationBLL conductor can be produced as standard in sizes from 50mm to 241mm. Standard specifications are as below Conductor, AAAC Extruded longitudinal water blocking layer Extruded, inner semiconductive layer Insulation of PE Outer layer of UV-resistant HDPE
|Lay up of conductor||7x3,08||7x3,57||7x4,25||19x2,84||19x3,26||19x4,02||37x3,37||[-]|
|Conductor diameter, bare conductor||9,24||10,71||12,75||14,2||16,3||20,1||23,59||[mm]|
|Inner semi conductive layer, thickness||0,3||0,3||0,3||0,3||0,3||0,3||0,3||[mm]|
|Inner PE covering, thickness,||1,2||1,2||1,2||1,2||1,2||1,2||1,2||[mm]|
|Outer UV-resist. HDPE-covering, thickness,||1,1||1,1||1,1||1,1||1,1||1,1||1,1||[mm]|
|Diameter over covering, min - max||13,9-15,3||15,4-16,8||17,4-18,8||18,8-20,3||20,9-22,4||24,7-26,2||28,1-29,7||[mm]|
|Rated operating voltage||20(24)||20(24)||20(24)||20(24)||20(24)||20(24)||20(24)||[kV]|
|DC-resistance at 20°C, maximum||0,600||0,445||0,318||0,259||0,2000||0,1265||0,099||[ohm/km]|
|Resistance temp. coefficient||0,004||0,004||0,004||0,004||0,004||0,004||0,004||[/°C]|
|Lightening impulse withstand strength of HDPE layer||100||100||100||100||100||100||100||[kV]|
|Operating temperature, maximum||70||70||70||80||70||70||70||[°C]|
|Max load(IEC 61597), cond.temp 70 °C, air temp. 20°C, wind speed 0,5 m/s, approximate value||232||280||350||394||473||619||778||[A]|
|Max short circuit current, 1 sec. 50-200°C||5,1||6,8||9,6||11,7||15,5||23,4||32,0||[kA]|
|Tensile strength of conductor, minimum||14,3||18,6||25,3||34,9||43,6||61,5||90,8||[kN]|
Maximum Drum Dimensions
|50mm BLL Maximum Length||Drum Size||Weight|
|6000m/drumtd>||2m x 1.18m||1720kg|
|157mm BLL Maximum Length||Drum Size||Weight|
|2800m/drumtd>||2m x 1.18m||1964kg|
InstallationBLL conductor has been tested to be compatible with a number of fitting solutions including compression fittings, preform ties and wedge taps. BLL has also a specifically designed cumalong clamp for ease of installation.
Features and Benefits of using BLL
|FEATURES OF BLL||BENEFITS|
|Non compacted construction||No problems with vibration|
|Inner & Outer cores bonded to give no slippage of outer covering||Conductor will break before any slippage occurs. Allows full tensions to be applied via covering.|
|Meets EN standard 50397||Compatible for use with all accessories and fittings made to standard.|
|100% recyclable||Meets latest European policy requirements.|
|Conductor covering contains additives against voltage break down||Track resistant.|
Conductor Stringing Equipment Available for HireRitelite is able to hire a range of equipment to assist with the stringing of BLL conductor including:
- Overhead Line Equipment
- Transporter Drum Stands
- Cable Drum Trailers
TrainingRitelite are happy to help customers with any training requirements they have before installing BLL covered conductors. Training can be carried out on site or at Ritelite's main office location. To find out more about BLL Covered Conductor or get a quotation for your project please contact the sales office on 01780 765600 or email email@example.com
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30 Years' Industry Experience
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Technical Expertise – Continually developing innovative solutions
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