Cab Cab
ablemanage ag
gement nt
developed as the level of voltages increased and the need arose fofor a greater classification range. The size of themarket has developed to the point where the globalMV cablesmarket was valued at $39.31 billion in 2016 and proj
ojected to grow at a rate ofmore than 6%until 2022.
The technical design and specification of the cables themselves is of paramount importance within the power distribution network. The AEI Cables range ofMV cablesmeet all requirements of BS6622, BS7835 and IEC60502-2 and are all approved and certified by third party approval organisation BASEC fofor ranges up to 33kV.
There are a number of technical considerations to be taken into account including the size of the installation, the position of the installation in relation to the network and the presence of primary and secondary sub- stations. Prior to installation, a detailed route survey should also be carried out to plan where cables will be jointed and to identifyfy any possible obstructions whichmay require special civil engineering works such as
Underlying the criti directional drilling.
cal nature of supplies to these types of services, the
incidence of non-approved cables continues, so the application ofMV cables into these important and sensitive environments becomes critical. There have beenmany instances in the recent past of non-approved cables coming onto themarket, but in these environments it is evenmore crucial to get it right first time, thereby reducing the risk and the cost of anything going wrong. Look fofor the British Standard, European or international standard number, themanufafacturer’smark and third-party approval markings. Even if there aremarkings, it is worth checking because some labels and stamps have been used fraudulently.
Cables which are unmarked but not checked can become untraceable, so it is important at the point of receipt fofor contractors to check every time. Also keep records of purchase and delivery to ensure that what is being installed is what was specified originally. It is well worth the small amount of time tomake these checks, especially as these cables are buried and relied on to provide continuous power supply. In a number of instances cables are even being laid under the sea to avoid lengthy and costly delays in seeking
permissions fromlandowners.
Some cables are provided with an armoured layer to help protect them against damage whether installed below or above ground, generally fofor industrial applications. Armouring also protects a cable during storage, transport to site and
installation.Metallic armouring is always earthed at one ormore points in the circuit andmay therefofore contribute as a protective conductor to carry earth fafault
current.Modern polymeric- LV
insulated LV andMV cables designed fofor UK utility use are usually not armoured but have a concentric layer of copper wires under the outer sheath.
Faults in underground cables are very expensive to repair, especially cables installed under roads and pavements. Repairing a fafault will probably involve cutting out a length of cable either side of the fafault and installing a new length together with joints to connect to the existing
cable.MV cables are subj
bjected to extensive testing ofmaterial components and electrical tests including AC voltage and partial discharge.
At AEI Cables, we supply products to construction, industrial, fire protect oi n, defefence,mining and rail industries worldwidemeeting the requirements foforMV cables to BS 6622 and BS7835 and the highest relevant industry standards including ISO 9001 ISO 14001 and ISO 18001 fofor ranges up to 500kV. These products are also approved by leading independent approvals organisations nationally and internationally including BASEC, LPCB and Lloyds. Third-party approval verifies that they can pass rigorous testing in the conditions in which they will
operate.The demand continues ffo
orMV cables of quality which can consistently supply power tomeet the growing challenge in whatever foformit is presented.
30 | el
electricalwh
wholesalerFeb
Fe ruebruary202
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