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Timestamp: 2018-12-19 13:55:24
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1 BU Industrial Projects The Quality Connection Comparison EN vs BS 5308
2 Comparison of EN and BS 5308 EN : A European standard for instrument cables has replaced BS 5308 Legal situation Technical comparison 2
3 Legal situation Extract from an article distributed in the magazin oil and gas years ago: The international market for instrumentation cables is largely characterised by an immense number of different products with a further rising tendency.. In this way the instrumentation cables are invented again and again with all corresponding consequences of loss of economic viability, clearness, rapidity, in summary of loss of efficiency in handling. The few existing national standards for instrumentation cables (eg. UK, France) are not suited as specification basis for the international scene. Tailor-made to its national market demands, they cover only a small fraction of the constructional and performance requirements of the International market. 3
4 Legal situation Extract from an article distributed in the magazin oil and gas years ago: The new European Standard EN for instrumentation cables, erected by the European Standardisation Organisation CENELEC and published in September 2005, is suited to solve this problem. It describes: Single and multielement cables with copper conductors They may be individually and/or overall screened and optionally may incorporate armouring and/or moisture or environmental protection layers. The constructional design options cover more or less the complete range of products worldwide completed by well-coordinated material and test standards. Thus, a conclusive, quality-assured standardised work, closed unit is now available. The structure of this standard is comparable to IEC , the standard for low voltage power cables. It does not contain finished products, but it specifies the single cable elements with its permitted constructional variants as well as the respective characteristic demands. 4
5 Legal situation Extract from an article distributed in the magazin oil and gas years ago: The application of this standard offers many chances to users, engineers and consultants such as manufacturers. Key improvements are: cost reduction clarity conclusiveness. The standard is now national standard in all CENELEC member countries. Further, all present national standards conflicting with it (like BS 5308, etc.) are withdrawn since
6 Legal situation Conclusion BS EN :2005 Sectional specification for instrumentation and control cables Effective April 1 st, 2008 supersedes BS 5308 : Part 1 : 1986, withdrawn July 31 st, 2009 supersedes BS 5308 : Part 2 : 1986, withdrawn July 31 st,
7 The ICON construction is very close to BS but offers more possibilities. ICON acc. to EN BS
8 Conductor: kind of conductor copper ICON acc. to EN solid stranded multistranded (HD383=IEC (cl. 1, 2, 5)) plain annealed or metal coated BS 5308 solid stranded multistranded (BS 6360) plain annealed dimension resistance 0.5; 0.75; 1.0; 1.3; 1.5; 2.5; (4.0) mm² 0.5; 0.75; 1.0; 1.5 mm² comparable with each other 8
9 Insulation: materials range thickness ICON acc. to EN PVC PE XLPE acc. to EN (21-29) temp. range from 70 C up to 105 C 300V 500V see next page BS 5308 Part 1 PE acc. to BS 6234 Part 2 PVC acc. to BS 7655 Temp. range max. 65 C 300/500 V see next page 9
10 insulation thickness in mm conductor size in mm² EN V min. value BS 300/500V PE min. BS 300/500V PVC min. ICON 500V nom. BS 300/500V PE nom. BS 300/500V PVC nom. * For 0.5mm² PE insulation values taken for solid conductor (BS) 10
11 With the ICON range we offer much more than BS 5308 conductor insulation material sheath material solid wire stranded mulitstranded conductor size PE PVC XLPE PVC LSZH 0,5 0,75 1 1,3 1,5 2,5 HDPE 80 C 70 C temp. range 90 C 105 C marked areas show the range defined in the BS 5308 standard offered as part of ICON range (acc. to EN ) 11
12 kind of elements twisting of elements Individual pair screens drain wire ICON acc. to EN core pair (twisted) triple (twisted) quad (twisted) lay length clearly defined; depending on conductor size and element; max.100 mm (up to 1.5 mm²) and max. 150 mm (up to 2.5 mm²) laminated tape aluminium/pet total thickness 24 µm (metallic side down, in contact with drain wire + wrapping consisting of one layer of plastic tape under and above screen) solid tinned copper drain wire 0.6 mm Ø, under individual screen BS 5308 core pair (twisted) quad (around a single dummy; only for 2 pair) reverse layer or reciprocating lay technique 100mm laminated tape aluminium/pet aluminium thickness 8 µm PET thickness 10 µm (metallic side down, in contact with drain wire + wrapping consisting of one layer tape (50% overlap) or two layers of tape ( 23µm) (each 25% overlap).) solid or stranded, tinned annealed copper cross section 0.5mm² 12
13 Colour code: Pairs ICON acc. to EN V 500 V BS 5308 PE insulated PVC insulated Triples (code is identical for all pairs) (code is different for no. pair >1) Not defined Quads Not defined (exception: 2 pair is a 1 quad construction) Remark: 300 V cables are continuously numbered on white core; 500 V on blue core differentiation of the pairs is defined through different colour codes for each pair; alternatively numbered PET foil around pairs 13
14 Overall screen: Collective screen (St) Metal braid C ICON acc. to EN collective screen (24 µm aluminium/pet) tape + 7 stranded tinned copper drain wire (0.5 mm²); overlap of foil min 20%; drain wire in direct contact with metallic side of the foil Wrapping layer of tape under collective screen tinned copper wires (C) wire diameter 0.3 mm filling factor 0.57 mm BS 5308 laminated tape aluminium/pet aluminium thickness 8 µm PET thickness 10 µm + drain wire (optional) consisting of solid or stranded, tinned annealed copper cross section 0.5mm² Wrapping layer of tape under collective screen not defined 14
15 Dimensional comparison of outer cable diameter BS and EN RE-Y(St)Y-fl 0,5 mm² (multistranded) outer Diam. in mm with tolerances indicated No. of pairs ICON EN V BS 5308 part2 300/500V ICON EN V 15
16 Conclusion of comparison on previous page: BS 5308 cables are slightly thicker (thus heavier) for some dimensions differences can hardly be recognized Result: Changing from BS to EN is very easy ask for our datasheets to check the dimensions for your specific cable 16
17 Metallic protection/armouring: round steel wire SWA flat steel wires with counter helix FG steel or brass tape B Metal braid Q ICON acc. to EN SWA Min. thickness of wires 0.9 mm (see next page for details) F (flat galvanised steel wire); G (counter helix) Only defined for overall diameter under armour 15 mm min. thickness of tape; brass: mm steel: 0.20 mm offered as double layer steel tape B galvanised steel wires ( Q ) wire diameter 0.3 mm filling factor 0.57 mm BS 5308 SWA Min. thickness of wires 0.9 mm (see next page for details) not defined not defined not defined 17
18 SWA steel wire dimension comparison: steel wire diameter in mm min max. cable diameter under armour in mm BS and EN use identical wire diameters BS 5308 EN
19 Bedding/inner sheath: materials ICON acc. to EN PVC (EN ) Polyethylene (EN ) Halogen free flame retardant compound LSZH (EN ) BS 5308 Explanation: Type 2 (armoured) Consequences for flame propagation Part I Part II Insulation PE PVC cables Bedding material Type 2 PE PVC Type 3 PVC Type 3 (with lead sheath and armour) used under a metallic sheath or armour and between a lead sheath and a metallic armour PE bedding (acc. to BS 6234) PVC bedding (acc. to BS 6746) a metallic sheath or armour and between a lead sheath and a metallic armour 19
20 Fact: inner sheath of part I cable constructions is defined as PE only Cable with steel wire armour and polyethylen insulation acc. to BS acc. to EN RE-2Y (St) 2Y SWA Yfl RE-2Y (St) Y SWA Y-fl No alternativ inner sheath is allowed Material for inner sheath can be chosen from list Consequence: cables with the construction RE-2Y(St)2YSWAYfl do not fulfilll the flame propagation test on bunched cables! Test on single cable BS EN equals (IEC ) Test on bunches cables BS EN equals (IEC ) 20
21 Outer sheath: material thickness ICON acc. to EN PVC (EN ) Polyethylene (EN ) Halogen free flame retardant compound LSZH (EN ) Calculated acc. to formular: without metallic protection S RT = 0.04 x D +0.7 (min. 0.8 mm) with metallic protection S RT = x D +1.1 (min 1.3 mm) D = Diameter under outer sheath BS 5308 Part I Part II Insulation PE PVC cables sheath material Type 1 PVC PVC Type 2 PVC PVC Type 3 PVC - Defined in a table, values between 0.8 mm and 2.9 mm as well depending on Type of cable (1-3) 21
22 Environmental and other protection: Moisture barriers Chemical protection Multilayer sheath (L)2Y4Y (ALNYC) EN ) Water swellable tape 2) Water swellable non toxic powder 3) Filling compound 4) Laminated sheath of a longitudinally overlapped metallic foil (150µm) 5) Combination of 1) 4) Multilayer sheath Laminated aluminium (Al) foil with an extruded layer of HDPE + layer of Polyamide (PA) Thickness of Al 15 µm Thickness of PA 0.3 mm (thickness at any point) BS 5308 not defined not defined 22
23 Lead sheath: Chemical protection Lead sheath M ICON acc. to EN M (Lead sheath) complying with EN can be apllied The thickness is calculated in acc. to the diameter (D) underneath; Formular: L RT = 0.03 x D+0.7mm BS 5308 Part 1 cables (PE insulation) may include a lead sheath; (Thickness of the sheath is given in a table) with a thickness at any point min mm 23
24 thickness of lead sheath [mm] 2,5 2 1,5 1 0,5 0 7,3 8,7 15,4 33,3 42,6 Diameter under lead sheath [mm] cable weight difference due to lead content [kg/km] Thickness acc. to EN Thickness acc. to BS weight difference The lead sheath calculated by the method of EN standard is rather thinner than the lead sheath acc. to BS (thicknesses given are nom. values) 24
25 Electrical requirements for cable with PE insulation: ICON acc. to EN BS 5308 Part 1 Insulation resistance acc. to EN G Ohm is required; ICON products are better than the standard Insulation resistance: 5 G Ohm conditions: 1 km length; 20 C 500 V d.c. applied for 1 min measured: insulation resistance measured against remaining conductors/ screens/ lead/armour result: 5 G Ohm conditions: 1 km cable length; 20 C 25
26 Electrical requirements for cable with PVC insulation : ICON acc. to EN BS 5308 Part 2 Insulation resistance acc. to EN M Ohm are required; ICON products are better than the standard Insulation resistance: 100 MOhm conditions: 1 km length; 20 C 500 V d.c. applied for 1 min measured: insulation resistance measured against against remaining conductors/ screens/armour result: 25 MOhm conditions: 1 km cable length; 20 C 26
27 Electrical requirements for cables: L/R ratio Mutual capacitance ICON acc. to EN conductor 300V and 500V 0.5 mm² 25 µh/ohm 0.75 mm² 25 µh/ohm 1.0 mm² 25 µh/ohm 1.3 mm² 40 µh/ohm 1.5 mm² 40 µh/ohm Values for Leoni Kerpen cables of the ICON family are below and thus better than the ones according to BS standard The differences are compared to Part 1: pf/m Part 2: pf/m BS 5308 conductor Part 1; Part mm² 25 µh/ohm 0.75 mm² 25 µh/ohm 1.0 mm² 1.3 mm² 1.5 mm² 40 µh/ohm Part 1 without or with collective screens as ind. pair conductor 0.5 mm² pf/m 1.0 mm² pf/m 1.5 mm² pf/m Part 2 conductor 0.5 mm² independant of constr. 250 pf/m 1.0 mm² 250 pf/m 1.5 mm² 250 pf/m 27
28 Electrical requirements for cables: ICON acc. to EN BS 5308 Test voltage cable rating EN ICON 300V 1.0 kv 1.5 kv Testvoltage AC 500V 2.0 kv 2.0 kv Testvoltage AC cable rating BS 300/500V 1.0 kv Testvoltage AC Test duration 1 minute Test duration 1 minute ICON test conditions are again higher than the EN demands for the 500V rated cables test are carried out at a test voltage twice as high as the demands in the BS 5308 more security offered by ICON 28
29 Summary EN offers a wide range of insulation/inner sheath/sheath materials there are no fixed dimensional links with respect to the materials cables are offered for 300V and 500V as different ranges (300V is lighter and smaller) cables are available as core, pair, triple or quad regardless the dimension or insulation material cable constructions exactly to customers needs no overengineering EN offers alternativ screens and armours a multilayer sheath ALNYC (free of lead) is offered as an alternative chem. protection environmental and cost effective aspects 29
30 Summary ICON instrumentation cables are in many points very close to the BS 5308 (electrical properties, dimensional factors) for some aspects ICON cables fulfill stronger test conditions better properties by changing over to ICON ICON standard range covers the market demands with respect to temperature requirements and additional protection (impact forces, environmental, chemical, rodent, fire performance behaviour) we offer a growing range of stock items ICON instrumentation cable opportunity to use standard products and save time and money product alterations are possible (e.g. colour code for cores or sheath, cable marking) documentation of routine tests or equivalent reports are available flexibility to fulfill your individual demands 30
31 Summary the decision for ICON instrumentation cable is a decision for the future planing with EN standard products today will guarantee the availablity for maintenance and expansion for this century as LEONI Kerpen is part of the Leoni Group (with over employees worldwide) we are a strong and steady partner for your international business with ICON instrumentation cable produced by LEONI Kerpen you have a profound partner for your measurement, control and steering equipment ICON instrumentation cable are your partner today and in the future 31
32 Abbreviations Y = PVC Yw = PVC with high temperature resistance Yö = PVC sheath with improved oil resistance 2Y = Polyethylen 2X = cross linked polyethylen insulation (XLPE) H = low smoke zero halogen (LSZH) sheathing material 2G = insulation offering circuit integrity (St) = overall screen C = copper wire braid Q = steel wire braid SWA = steel wire armour B = flat steel tape armour FG = flat steel wire, counter helix M = lead sheath (L)2Y = multilayer sheath (L)2Y4Y = ALNYC sheath PIMF = in metal foil e.g. PIMF = pair in metal foil (individual pair screen) 32
33 Thank you very much for your attention! Any further questions? 33
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