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Flexible power and control cables Manufactured by Cavotec Group

Flexible power cables Flexible control cables Who we are Cavotec is a multi-national group of companies serving the following industries: mining and tunnelling, ports and maritime, steel and aluminium, energy and offshore, airports, general industry and automation. In the early 1960’s our main focus was the design and production of motorised cable reels primarily for manufacturers of tower cranes, harbour cranes and mining equipment. Today, Cavotec is connecting mobile equipment around the world in many diverse applications. The Cavotec Group consists of 7 manufacturing “Centres of...

Cavotec Group Organisation As shown here the Cavotec Group is organised to support its customers around the world through its manufacturing units and sales companies. Each Cavotec manufacturing company, no matter where it is located, aims at being a market leader in its field by providing innovative and reliable products to Group customers. Each Cavotec sales company, in the 27 countries where they operate, aims at better serving its local market following the Group philosophy “to be local everywhere”. Manufacturing network Centres of Excellence Local Manufacturing Group Partners France...

Flexible power and control cables

How to choose the right cable for the job 4 Panzerflex® 1 kV low voltage power cable 11 Panzerflex® 1 kV low voltage control cable 12 Comparison between metric cross-section and AWG numbers 31 Flexible power and control cables • 5

How to choose the right cable for the job. To illustrate possible questions that arise from using cables in different types of applications we have included below a case study from Palazzo Pirelli. This study is based completely on their technical calculations and experience and is not automatically applicable to other types or brands of cable. In order to be sure of the latest information and any possible changes always contact your cable manufacturer. Bending is not the only stress present with cables used for heavy duty applications. Mobile cables are subject to other stresses and...

Bending radius and overall diameters Precise calculation of the bending radius is a determining factor for cable reliability. A decrease in minimum bending radius has a major effect on the life of a cable because it causes stretching and internal distortions. Another important factor is the frequency of the cable movements. If movement is slow and infrequent a tighter bending radius can be considered. Special attention should be taken for installations with pulleys or guide-rollers. Special attention should also be paid to installations where flexing and torsion is present due to the reels...

How to choose the right cable for the job. Other systems of cable movement The systems most frequently employed are perhaps cable tender systems, pulley systems and cable chains. The first two systems involve high tensile stress whereas the third on a whole does not. Particular attention must be paid to the minimum bending radius and to the distribution of loads between the cables and cable tenders. Cables with a greater cross section should bear the loads and not the control cables that may be present. Guide pulley and anchoring devices. When designing these components, care must be taken...

Table 3: Current carrying capacities for continuous operation Type of cable PANZERFLEX® FLEXIFLAT PANZERFLAT® BASKETHEAVYFLEX® 1 cable laid on the ground Cross section Insulation: EPR - Conductor temperature: 80°C Ambient temperature: 30°C Current carrying capacity correction factors For ambient temperatures other than 30°C Ambient temperature (°C) 25 Correction factor 1,05 Reel type Number of layers on reel 1 Correction factor 0,80 Type of cable For multi-core cables Number of conductors loaded Correction factor Various 0,8 Round cables 14 0,50 Various 0,5 Flat cables 24 0,40 Table 4:...

How to choose the right cable for the job. Voltage drop The voltage drop should not only be checked for low voltage but also for medium voltage applications. The value is calculated by multiplying the factors K (mV/Am) given in table 5 with the current capacity I (A) of the cable and by the length of the connection L (km). This calculation is valid with sufficient approximation for all voltages where: conductor temperature = 80C; cos ϕ 0,8; frequency = 50 Hz. Voltage drop (V) = I(A) x L (km) x K(mV/Am). The factors have been calculated using the formula: K(mV/Am) = 1,73 x (R cos ϕ X sen j)...

Thermal limit in case of short circuit In accordance with VDE Standard 0250 c. 8/75 the admissible thermal limits for short circuit current in heavy cables must be calculated using the following reference values: • Initial temperature: 80°C (cable under full load) • final short circuit temperature: 200°C Final S.C. temperature °C 160° 200° 250° Dynamic limit in case of short circuit The electro-dynamic forces generated during short circuit tend to separate single core cables or the cores of three/four cables forcibly. To counteract these forces in single core cables, attention must be paid...

Flexible power and control cables

Panzerflex® 1kV; low voltage power cable LOW VOLTAGE Flexible tinned stranded copper conductor EPR rubber compound insulation Tape Polychloroprene based compound inner sheath 5 Antitwisting protection of synthetic yarns 6 Black polychloroprene based compound outer sheath Applications Panzerflex® special flexible heavy duty power cables have been developed for use on moving installations where there are high torsional and tensile stresses, ambient conditions are harsh or there is danger of abrasion and crushing. Typical applications for Panzerflex® are mobile installations on all types of...

Panzerflex® 1kV; low voltage control cable LOW VOLTAGE Flexible tinned stranded copper conductor EPR rubber compound insulation Tape Polychloroprene based compound inner sheath 5 Antitwisting protection of synthetic yarns 6 Black polychloroprene based compound outer sheath Flexible power and control cables Applications Panzerflex® special, flexible control cables have been developed for use on moving installations where there are high torsional and tensile stresses and ambient conditions are harsh. Panzerflex® low voltage control cable has been especially designed for vertical reeling...