GENERAL CABLE NEK TS 606 www.forum.cabledatasheet.com

 

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GENERAL CABLE NEK TS 606 www.forum.cabledatasheet.com

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offshore cables

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foreword one of the world s biggest companies in the sector general cable corporation is one of the world s leading cable manufacturing companies in its work it has contributed decisively to progress and improvements in people s quality of life through innovation and technology general cable is present in the development and evolution of society with more than 13,000 associates operating in 26 countries and 57 manufacturing facilities general cable is a global leader in the supply of products and services to the global oil gas and petrochemical industry the company has a hundred-year tradition and its own values based on customer satisfaction integrity in all it does teamwork delivery speed creativity and innovation and ongoing improvement in which people are its main source of value this is general cable a company with a commitment to the future to innovation and to sustainability it is a company prepared to meet its commitment to society and the environment.

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index 06 symbols 08 introduction offshore cables 19 technical information 24 selection guide 27 cables for offshore installations 72 installation guide general cable reserves the right to alter or modify specifications and materials in the light of later technical development.

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symbols flame retardant single wire iec 60332-1-2 flame retardant bunched wires iec 60332-3-22 cat a fire resistant iec 60331 low smoke emission iec 61034-2 halogen free iec 60754-1 low acidity and corrosivity of evolved gases iec 60754-2 increased flexibility mechanical resistance heavy duty 6

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weathering test resistant mineral oil resistance hydrocarbon resistance reduced bending radius electro-magnetic interference protection watertight mud oil resistance work at very low temperature -40 ºc 7

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introduction offshore cables in this catalogue general cable presents its series of shipboard energy control and instrumentation cables for fixed installations on vessels and oil rigs the safety of people and equipment is a priority consideration in the design and construction of exzhellent-606 and genfire-606 cables they are made from zero-halogen compounds with a low-acidity and -corrosivity of gases evolved and a low opacity of fumes evolved during combustion in accordance with the corresponding iec standards they therefore allow for quick safe evacuation in the event of fire the cables are designed to comply with the strictest non-fire propagation standards and prevent the generation of secondary seats of fire even in circumstances of high cable concentration in unfavourable conditions there are also fire-resistant designs that feature not only the above properties but are also able to continue providing service even when directly affected by fire their use in safety services enables the services to continue working even in situations of fire reinforced cables feature standard tinned copper braiding that provides good mechanical protection and may also be used in specific applications such as shielding exzhellent-606 and genfire-606 cables may be used in extreme climates principally because of their resistance to very low temperatures this catalogue also includes specific designs for energy cables used in circuits with variable frequency drives vfd the cables described in this catalogue have been designed in accordance with the following standards and specifications technical specifitation nek ts 606 cables for off-shore installation halogen-free and/or mud resistant technical specification iec 60092-350 electrical installations in ships iec 60092-352 choice and installation of electrical cables 8

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iec 60092-353 single and multicore non-radial field power cables with extruded solid insulation for rated voltages 1 kv and 3 kv iec 60092-354 single and three-core power cables with extruded solid insulation for rated voltafes 6 kv up to 30 kv iec 60092-376 cables for control and instrumentation circuits 150/250 v iec 60092-351 insulation materials for shipboard and offshore units power control instrumantarion telecommunication and data cables iec 60092-359 sheathing materials for shipboard power and telecommunication cables iec 60228 conductors of insulated cables iec 60332-3-22 cat a tests on bunched electric cables under fire conditions fire retardant iec 60331-21 circuit integrity procedures and requirements for cables up to and including 0,6/1 kv iec 60331-1 circuit integrity test method for a temperature of at least 830 ºc for cables rated up to 0,6/1 kv and with an overall diameter exceeding 20 mm iec 60331-2 circuit integrity test method for a temperature of at least 830 ºc for cables rated up to 0,6/1 kv and with an overall diameter not exceeding 20 mm iec 60754-1 determination of the amount of halogen acid gas 9

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iec 60754-2 determination of degree of acidity of gases iec 61034-2 measurement of smoke density cables shown in this cataloge are covered with type approvals from main classification societies abs bureau veritas germanischer lloyd lloyd s register det norske veritas 10

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aplications depending on their use the cables are distributed into the following groups low voltage power cables nek ts 606 power cables suitable for operation at up to and including 0.6/1 kv constructions up to and including 4 core coloured core identification non armoured and armoured with tinned copper wire braid available designs with mud resistance and/or fire resistance circuit integrity available designs for variable frequency drives vfd medium voltage cables nek ts 606 cables for distribution of energy in voltages of 3,6/6 to 12/20 kv armoured with tinned copper wire braid available designs with mud resistance control cables nek ts 606 available from 2 to 37 cores identification by numbering armoured with tinned copper wire braid available designs with mud resistance and/or fire resistance circuit integrity intrumentation cables nek ts 606 multiunit pairs or triple core cores identified by colours and numbered tape in each unit two pair cable without individual screen has a star/quad composition individual and/or collective screening of units using cu poliester tape and drain wire cable screening using tinned copper wire braid construction on the basis of the above-mentioned iec standards and reviewing the formation of the cables we have conductor tinned annealed copper in accordance with iec 60092-350 class 2 rigid conductors with 7 wire formation in small sections or concentric layers in big cross sections class 5 flexible conductors bunched or multibunched configurations in general those class 2 are used but the use of class 5 is growing due to their handeability and therefore their greater ease of installation 11

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tin plated conductor is used to offer greater protection of conections against oxidation in heavy marine environments see the following tables for standarized sections and compositions to be used cross sectional area voltage kv area of conductor mm2 cable type iec standard power low voltage 1 kv 3 kv 250 v 6 kv 10 kv 15 kv 20 kv 1,5 300 mm2 10 300 mm2 0,50 2,50 10 630 mm2 16 630 mm2 25 630 mm2 35 630 mm2 60092-353 instrumentation 60092-376 power medium voltage 60092-354 composition number of cores cable type number of cores iec standard power l.v n not specified 60092-353 control cables 2,4,7,12,19,27,37 cores 60092-376 instrumentation 1,24,7,10,14,19 24,30,37 pairs 60092-376 power m.v 1 or 3 cores 60092-354 two pair cable is a star-quad composition cores diametrally oposed are used to conform the pairs 12

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insulation materials nek ts 606 specifies insulation materials making reference to standard iec 60092-351 the ones used in the current catalog are epr ethylene propylene a thermosetting elastomer it has an almost nil distortion due to the action of heat it gives the cable greater flexibility especially suitable if the sheath has to be a crosslinked compound hepr hard grade etylene propylene improved epr compound bringing beter performance both in mechanical o electrical properties this brings to a thickness insulations similars to the xlpe ones insulation materials maximum rated conductor temperature ºc t ype of insulating compound abbreviated designation normal operation short-circuit elastomeric or thermoset ethylene-propylene rubber or similar epm o epdm halogen free high modulus of hard grade halogen free ethylene propylene rubber epr 90 250 hepr 90 250 sheating materials the sheath of the cables protects the set of cores from the mechanical or environmental aggressions they can suffer mechanical aggressions are mainly abrasions from the dragging of the cables and tears at angles of the tubes and occur during the installation while the environment aggressions heat presence of oils or aggressive agents will affect the cable throughout its working life halogen free termosetting compound shf 2 it has the advantages of being a heat-stable compound which does not release toxic gases or opaques smoke in case of fire see annex 2 and it has good resistance to oils fuel and solvents good resistance to mechanical demands 13

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halogen-free mud-resistant crosslinked compound shf mud the same characteristics as per material type shf 2 adding mud resistance according to nek ts 606 type of sheathing compound abbreviated designation elastomeric or thermoset ethylene-propylene rubber or similar epm o epdm halogen free high modulus of hard grade halogen free ethylene propylene rubber shf 2 shf mud armouring the armour gives the cable mechanical protection the copper in tinplated version being used in this case the use of tinned copper in the armour performs a dual function as it behaves as armour but also as a screen type materials braid tinned annealed copper screening in low tensión cables the screens are the elements which provide the cable protection against electromagnetic fields this is an element especially suitable for cables for instrumentation control and transmission of signals thanks to its sensitivity to radiation which can distort the signal transmitted by the cable to protect the cable from radiation it is necessary to screen the group of conductors protection from external disturbance or each one of the pairs or triples electromagnetic fields from other elements of the same cable according to the standard screens can be either braid or laminated polyester tape in all designs of 2 3 and 4 cores the screen cross-section has been defined according to the criteria set in standard iec 60092-352 table 2 so it can be used as an earthing conductor in armoured type cables the use of tinned copper wire braid armour when properly earthed allows to use it as a collective screen type materials braid tape 14 tinned annealed copper cu polyester

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electromagnetic compatibility emc when general cable products are installed in accordance with iec 60533 they fulfil the requirements for electro-magnetic compatibility fire performance of cables to establish how cables perform in the event of fire a series of standards have been developed to define fire conditions and measure the cable s performance in a similar situation to that of the installation it should nonetheless be remembered that these tests establish fixed reproducible conditions used to appraise the performance of the cables in this situation current iec standards envisage the following events flame retardant iec 60332-1-2 a 1 kw flame in contact with the cable sheath for a time established in the standard should not spread the cable will not therefore prompt a fire caused by a minor incident or by an external heat source with which it comes into accidental contact flame retardant iec 60332-3-22 a fire unconnected with the cable may affect a wiring system and become more serious if the system is oriented vertically thus allowing the circulation of air and the creation of a chimney effect if the decomposition temperature of the organic materials is reached exothermic combustion of the cables occurs and the fire spreads the insulation compounds used in exzhellent-606 y genfire-606 cable sheaths are designed to hinder exothermic reaction to simulate this situation the test involves the application of powered air and a 20-kw gas burner to a bundle of cables arranged to simulate a vertical wiring system in these conditions a fire in the cables prolonged for 40 must go out in the time established in the standard and must not exceed a length of 2.5 metres the prescribed standard applicable in the ship industry is iec 60332 part 3-22 cat a category a prescribes the maximum volume of inflammable material seven litres per metre fire resistance iec 60331 iec 60331 defines the test conditions applied to a cable that must remain in service in safety circuits even when directly affected by a fire and when its organic parts are decomposing iec 60332-1 15

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