product range - nexans final lv.pdf · product range qicc – a nexans company is committed to...

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QICC – a Nexans Company is committed to deliver the highest standard wires and power cables to

the local market, GCC and for export.

In order to fit for the customer demand in the Middle East and for export, QICC – a Nexans Company

produces a versatile product range covers most of our customer needs:

BUILDING SECTION:

• Flexible wires and cables up to 16 mm2 to IEC 60227, EN 50525, BS 6004 & BS 6500.

• Building wires (NYA) to IEC 60227, EN 50525 and BS 6004, from 1.5 mm2 and above.• Halogen Free Flame Retardant wire (HFFR/LSZH) to BS 7211 and EN 50525, with thermo

setting insulation which is alternative to wire type (NYA), where the application requires higher

standards of safety against the emission of smoke, fumes and toxic gases.

The wires coming mainly single core.

LOW VOLTAGE SECTION:

• Low Voltage power Cables with PVC and XLPE insulation to IEC 60502-1, BS 5476 and BS 6346.

The cables can be single core, and multi core up to 48 cores.

MEDIUM VOLTAGE SECTION:

• Medium Voltage cables to IEC 60502-2 up to 18/30 (36) kV and to BS 6622 up to 19/33 (36) kV.• LV cables with HFFR, thermosetting insulation.

The cables are produced according to BS 6724, IEC 60502-1and tested to IEC 61034, IEC 60754 &

IEC 60332.

• MV cables with HFFR to BS 7835.

The cables can be single core, and three cores cable.

HIGH VOLTAGE AND EXTRA HIGH SECTION:

• High Voltage and Extra High Voltage cables up to 220 kV to IEC 60840 / IEC 62067, with

conductor sizes up to 2500 mm2.

The cables are single core only.

DDEESSIIGGNN CCRRIITTEERRIIAA

A power cable is an assembly of one or more electrical conductors, usually held together with an

overall sheath. The assembly is used for transmission of electrical power. Power cables may be

installed as permanent wiring within buildings, buried in the ground, run overhead, or exposed.

Flexible power cables are used for portable devices, mobile tools and machinery.

1. CONDUCTOR:

Is an object or type of material that permits the flow of electrical current in one or more directions.

Conductor materials are:

- Plain annealed or tin coated copper conductor (to BS EN 1977, ASTM B3, ASTM B49 &ASTM B 33)

- Aluminum (to ASTM B233)The conductor structure is complying with the requirements of IEC 60228 class 2 stranded, noncompacted, compacted or compacted sector shaped conductors.

2. INSULATION:

The insulating materials used include:

2.1 Polyvinylchloride (PVC): (PVC/A 70 oC) complying with IEC 60502-1 requirements or Types (TI1

70 oC) & Heat Resistant PVC type TI-3 (90 oC to 105 oC) complying with BS EN 50363-3.

2.2 Halogen-Free, Flame Retardant compound (HFFR).

2.3 Cross-linked polyethylene (XLPE): complying with IEC 60502 and GP8 as per BS 7655-1.3

The insulation of building wires is covered by Ultra-violet (UV) resistant Masterbatch.

3. Insulated Core Color Codes:

Number ofcores Colors to IEC 60502-1 Colors to BS 5467

1 Red or Black Brown or Blue

2 Red & Black Brown & Blue

3 Red, Yellow and Blue Brown, Black and Grey

4 Red, Yellow, Blue and Black Blue, Brown, Black and Grey

5 Red, Yellow, Blue, Black andGreen / Yellow

Green / Yellow, Blue, Brown,Black and Grey

4. SCREEN DESIGNS:

The standard range of QICC Medium Voltage XLPE cables rated up to and including 33 kV

incorporates copper wire screens based on fault levels of either 3 kA or 10 kA for 1 second. If either

of the standard screen designs does not suit a particular installation, the screen constructions can be

tailored in size to meet the specific fault requirements of any operating system.

5. WIRE SCREEN CROSS SECTIONAL AREAS:

In the case of three core cables which have screens around each individual core, the total screen

cross sectional area is spread evenly over the three cores.

There are several other factors which can override the above criteria.

Firstly, the screens are designed so that the average gap between the wires does not exceed 4 mm.

This result in the screen area being increased above that required for the required fault level in

certain cases. Secondly, the screen area is limited to a value so that its fault rating does not exceed

that of the conductor. In some cases, the smaller cables in a range have fault levels of less than

either 3 kA or 10 kA for 1 second respectively.

6. CABLE ASSEMBLY:

The Insulated cores are assembled together to form the laid up cable cores in case of multi core

cables.

Extruded suitable polymer compound or non-hygroscopic polypropylene filler is applied (when

required) between laid up cores to provide a circular shape to the cable.

7. JACKETINGS:

There are 3 different types of extruded sheaths:

7.1 Outer sheath

It provides protection of the cable from outside.

7.2 Inner sheath

It applies under a metallic protection and - optional - under a lead sheath.

7.3 Bedding

It separate the sheath applied between a lead sheath and a metallic protection (may also

consists of plastic tapes).

The following materials can be used for the sheath:

Polyvinylchloride (PVC) Type ST2 compounds as specified in IEC 60502-1, or its equivalent

PVC Type 9 to BS 7655-4.2.

Polyethylene (PE) compound fulfill and exceed the requirements of Type ST7 IEC 60502-1

for cables that require being abrasion resistant, protected against water ingress and strong

Environmental Stress Crack Resistant (ESCR).

Halogen Free Flame Retardant (HFFR) compounds complying with ST8 to IEC 60502-1

or Types LTS 1 & LTS 4 to BS 7655: section 6 for cables installed in intrinsically safe locations

and where the cables require being low smoke, low fume and low toxic gas emitting in case of

fire. Cables to this category are complying with the requirements of BS 6724.

All cables produced at QICC – a Nexans Company with PVC or HFFR jackets are complying

with the flame retardant test to IEC 60332-1 and Ultra-violet (UV) resistant Masterbatch.

Whenever a requirement for more severe tests as IEC 60332-3 is needed, Oil resistant and

Hydrocarbon resistant for Oil and Gas projects.

8. ARMOUR:

There are 3 different types of armouring are listed below:

Galvanized round steel wire armour “SWA”:

(The wire diameter depends on the cable diameter under armour, min. diameter 0.9 mm).

Single or double layer of steel “STA” :

(The minimum thickness of a tape shall be 0.2 mm).

Aluminum or copper wire armour “AWA / CWA”:

(The wire diameter depends on the cable diameter under armour, min. diameter 0.9 mm).

9. JACKETING MARKETING:

Standard engraving outerJacket Marking consisting of:

1. Type designation, size of conductor, rated voltage, standard.2. Name of manufacturer “QICC-Nexans”.3. Year, continuous length marking every meter.4. Any special part no. on request.

10. INSTALLATION

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Low voltage cables with both PVC and XLPE insulation are suitable for indoor and outdoor

applications. The methods are based on IEC 60364-5-52 or BS 7671 IEE wiring regulation

seventeenth edition.

Below are the recommendations to be followed in order to get the optimal cable service:

1. Unarmoured cables are not recommended for direct buried applications, except if thequoted cables are designed and produced to pass direct burial test requirements (example, directburial tests described in UL 1277 and UL 1581).2. Armoured cables are not recommended for tray applications, as they are heavy in weightand extra loads are exerted on the tray.3. A PVC jacket is a very stable material against a wide range of chemicals, while HDPEjacketed cables can serve better in wet locations.4. A recommended minimum bending radius as per the technical data sheet of each group.5. HFFR cables are not recommended for direct buried applications, as the material is soft andit’s mainly for building proposes.

10.1 CABLE PULLING-IN FORCE:

Care should be taken to prevent damage to insulation or distortion of cable during installation.

The pulling force in Newtons should not exceed 0.036 times the circular mil area of the copper

cross-sectional area times the number of conductors in the cable when pulling on the conductors

utilizing pulling eyes and bolts. Pulling force for multi core cables when utilizing eyes or bolts should

not include drain or ground conductors in the copper cross-sectional area. When pulling with a

basket weave grip, maximum pulling tension (per grip) should not exceed 4.5kN, or the value

calculated for eyes or bolts, whichever is greater.

The sidewall pressure should not exceed a maximum of 7.3kN per meter of the inside radius of the

bend.

Cables should not be pulled in freezing conditions. If conditions are below 0°C, consult the

manufacturer.

If it is necessary to pull in these conditions, cables should be stored at a temperature above 10°C for

24 h prior to installation, if the cable has been previously stored in an area under 0°C.

When installing low smoke cables, additional consideration should be given to handling and

lubrication due to their possible lower tear strength and higher coefficient of friction than other

marine cable.

For more guidance concerning this subject, refer to IEEE Std 576-2001

10.2 Single-conductor ac cables:

To avoid an undesirable inductive effect in ac installations, the following precautions should be

observed.

Closed magnetic circuits around single-conductor ac cable should be avoided, and no magnetic

material should be permitted between cables of different phases of a circuit.

1. Single-conductor ac cables should not be located closer than 76mm from parallel magneticmaterial.2. Single-conductor ac cable should be supported on insulators. Armor, if used, should begrounded only at approximately the midpoint of the cable run.3. Where single-conductor ac cables penetrate the bulkhead, conductors of each phase of thesame circuit should pass through a common nonferrous bulkhead plate to prevent heating of thebulkhead.4. Single-conductor cables in-groups should be arranged to minimize their inductive effect. Thismay be accomplished by the transposition of cables in groups of three (one each phase) to give theeffect of triplexed cable. This transposition should be made at intervals of not over 15m and need notbe made in cable runs of less than 30m.

10.3 Cable continuity and grounding:

All cable should be continuous between terminations; however, splicing is permitted under certain

conditions. For cable provided with armor, the armor should be electrically continuous between

terminations and should be grounded at each end (multi conductor cables only); except that for final

sub circuits, the armor may be grounded at the supply end only.

10.4 Cable locations:

Cable installation should avoid spaces where excessive heat and gases may be encountered such as

galleys, boiler rooms and pump rooms, and spaces where cables may be exposed to damage such

as cargo spaces and exposed sides of deck houses. Cables should not be located in cargo tanks,

ballast tanks, fuel tanks, or water tanks except to supply equipment and instrumentation specifically

designed for such locations and whose functions require it to be installed on the tank. Such

equipment may include submerged cargo pumps and associated control devices, cargo monitoring,

and underwater navigation systems.

Unless unavoidable, cables should not be located behind or embedded in structural heat insulation.

Where cables are installed behind paneling, all connections should be readily accessible and the

location of concealed connection boxes should be indicated. Cables should preferably not be run

through refrigerated cargo spaces.

Cables should not be located below the faceplate of the vessel s main bottom structural members or

within .6m above any double bottom tank top.

10.5 Cable protection:

Cables should be adequately protected where exposed to mechanical damage. Cables should be

secured against chafing or displacement due to vibration. Cables in bunkers, and where particularly

liable to damage, such as locations in way of cargo ports, hatches, tank tops, and where passing

through decks, should be protected by removable metal coverings, angle irons, or other equivalent

means.

Where cables pass through insulation, they should be protected by a continuous pipe. For wiring

entering refrigerated compartments, the pipe should be of heat-insulating material (fiber or phenolic

tubing) joined to the bulkhead-stuffing tube, or a section of such material should be inserted between

the bulkhead-stuffing tube and the metallic pipe.

Where cables are installed in pipes, the space factor (ratio of the sum of the cross-sectional areas

corresponding to the external diameter of the cables to the internal cross-sectional areas of the pipe)

shall not be greater than 0.41, except for two cables, where the space factor shall not exceed 0.31,

Pipes shall be so arranged or designed to prevent the accumulation of internal condensation.

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1. THE INTERNATIONAL ELECTROTECHNICAL COMMISSION (IEC)

DOCUMENT NO. DOCUMENT NAME

IEC 60038 IEC standard voltages - Edition 7.0

IEC 60050-121 AMENDMENT 2 International Electro technical Vocabulary â€“ Part 121:Electromagnetism - Edition 2.0

IEC 60060-1 High-Voltage Test Techniques Part 1: General Definitions and TestRequirements - Edition 2.0; The contents of the corrigendum of March 1992have been included in this copy

IEC 60183 AMD Guide to the Selection of High-Voltage Cables - Edition 2.0

IEC 60227-1 Polyvinyl chloride insulated cables of rated voltages up to and including450/750 V “ Part 1: General requirements - Edition 3.0

IEC 60227-2 Polyvinyl Chloride Insulated Cables of Rated Voltages up to and Including450/750 V - Part 2: Test Methods - Edition 2.1; Edition 2: 1997 Consolidatedwith Amendment 1: 2003

IEC 60227-3 Polyvinyl Chloride Insulated Cables of Rated Voltages up to and Including450/750 V - Part 3: Non-Sheathed Cables for Fixed Wiring - Edition 2.1

IEC 60227-4 Polyvinyl Chloride Insulated Cables of Rated Voltages up to and Including450/750 V - Part 4: Sheathed Cables for Fixed Wiring - Edition 2.1; Edition2: 1992 Consolidated with Amendment 1: 1997

IEC 60227-5 Polyvinyl Chloride Insulated Cables of Rated Voltages up to and Including450/750 V - Part 5: Flexible Cables (Cords) - Edition 2.2; Edition 2:Consolidated with Amendments 1:1997 and 2:2003

IEC 60227-6 Polyvinyl Chloride Insulated Cables of Rated Voltages up to and Including450/750 V - Part 6: Lift Cables and Cables for Flexible Connections - ThirdEdition

IEC 60227-7 Polyvinyl chloride insulated cables of rated voltages up to and including450/750 V Part 7: Flexible cables screened and unscreened with two or moreconductors - Edition 1.1; Edition 1: 1995 Consolidated with Amendment 1:2003

IEC 60229 Electric cables “ Tests on extruded over sheaths with a special protectivefunction - Edition 3.0

IEC 60230 Impulse Tests on Cables and Their Accessories - First Edition

IEC 60270 High-Voltage Test Techniques - Partial Discharge Measurements - ThirdEdition; Corrigendum 1, 10/2001

IEC 60287-1-3 Electric Cables - Calculation of the Current Rating - Part 1-3: Current RatingEquations (100% Load Factor) and Calculation of Losses - Current Sharingbetween Parallel Single-Core Cables and Calculation of Circulating CurrentLosses - First Edition

IEC 60287-2-1 Electric cables “ Calculation of the current rating â€“ Part 2-1: Thermalresistance “ Calculation of the thermal resistance CORRIGENDUM 1 -Edition1.2

IEC 60332-3-10 Tests on electric and optical fibre cables under fire conditions “ Part 3-10:Test for vertical flame spread of vertically-mounted bunched wires or cables “Apparatus - Edition 1.1; Consolidated Reprint

IEC 60332-3-21 Tests on Electric Cables Under Fire Conditions - Part 3-21: Test for VerticalFlame Spread of Vertically-Mounted Bunched Wires or Cables - Category AF/RFirst Edition

IEC 60332-3-22 Tests on electric and optical fiber cables under fire conditions “ Part 3-22:Test for vertical flame spread of vertically-mounted bunched wires or cables “Category A - Edition 1.1; Consolidated Reprint

IEC 60332-3-23 Tests on electric and optical fiber cables under fire conditions “ Part 3-23:Test for vertical flame spread of vertically-mounted bunched wires or cables “Category B - Edition 1.1; Consolidated Reprint

IEC 60332-3-24 Tests on electric and optical fiber cables under fire conditions “ Part 3-24:Test for vertical flame spread of vertically-mounted bunched wires or cables “Category C - Edition 1.1; Consolidated Reprint

IEC 60332-3-25 Tests on electric and optical fiber cables under fire conditions “ Part 3-25:Test for vertical flame spread of vertically-mounted bunched wires or cables “Category D - Edition 1.1; Consolidated Reprint

IEC 60364-5-52 Low-voltage electrical installations â€“ Part 5-52: Selection and erection ofelectrical equipment “ Wiring systems - Edition 3.0

IEC 60446 Basic and safety principles for man-machine interface, marking andidentification “ Identification of conductors by colours or alphanumerics -Edition 4.0

IEC 60502-1 Power cables with extruded insulation and their accessories for rated voltagesfrom 1 kV (Um = 1,2 kV) up to 30 kV (Um = 36 kV) â€“ Part 1: Cables forrated voltages of 1 kV (Um = 1,2 kV) and 3 kV (Um = 3,6 kV) - Edition 2.1;Consolidated Reprint

IEC 60502-2 Power Cables with Extruded Insulation and Their Accessories for RatedVoltages from 1 kV (Um = 1,2 kV) up to 30 kV (Um = 36 kV) - Part 2:Cables for Rated Voltages from 6 kV (Um = 7,2 kV) and up to 30 kV (Um =36 kV) - Edition 2

IEC 60719 Calculation of the Lower and Upper Limits for the Average Outer Dimensionsof Cables with Circular Copper Conductors and of Rated Voltages up to andIncluding 450/750 V - Edition 2; CENELEC EN 60719: 1993

IEC 60724 Short-circuit temperature limits of electric cables with rated voltages of 1 kV(Um = 1,2 kV) and 3 kV (Um = 3,6 kV) - Edition 3.1; Consolidated Reprint

IEC 60826 Design criteria of overhead transmission lines - Third Edition

IEC 60840 Power cables with extruded insulation and their accessories for rated voltagesabove 30 kV (Um = 36 kV) up to 150 kV (Um = 170 kV) Test methods andrequirements - Third Edition

IEC 60853-3 Calculation of the Cyclic and Emergency Current Rating of Cables Part 3:Cyclic Rating Factor for Cables of all Voltages, with Partial Drying of the Soil -First Edition

IEC 60865-1 Short-circuit currents - Calculation of effects - Part 1: Definitions andcalculation methods - Second Edition; Corrigendum 1: 03/1995

IEC 60885-1 Electrical test methods for electric cables Part 1: Electrical tests for cables,cords and wires for voltages up to and including 450/750 V - First Edition

IEC 60885-3 Electrical Test Methods for Electric Cables Part 3: Test Methods for PartialDischarge Measurements on Lengths of Extruded Power Cable First Edition -First Edition

IEC 60889 Hard-Drawn Aluminum Wire for Overhead Line Conductors - First Edition

IEC 60949 AMD 1 AMENDMENT 1 Calculation of thermally permissible short-circuit currents,taking into account non-adiabatic heating effects - Edition 1.0

IEC 60986 Short-circuit temperature limits of electric cables with rated voltages from 6kV (Um = 7,2 kV) up to 30 kV (Um = 36 kV) - Edition 2.1; ConsolidatedReprint

IEC 61089 Round Wire Concentric Lay Overhead Electrical Stranded Conductors - FirstEdition; Amendment 1-1997; Replaces 60207 thru 60210: 1966

IEC 62067 Power cables with extruded insulation and their accessories for rated voltagesabove 150 kV (Um = 170 kV) up to 500 kV (Um = 550 kV) â€“ Testmethods and requirements - Edition 1.1 * Consolidated Reprint

IEC GUIDE 104 Preparation of Safety Publications and the Use of Basic Safety Publicationsand Group Safety Publications - Third Edition

IEC TR 61597 Overhead Electrical Conductors - Calculation Methods for Stranded BareConductors - Edition 1

IEC TS 61394 Overhead Lines - Characteristics of Greases for Aluminium, Aluminium Alloyand Steel Bare Conductors - Edition 1.0; Includes Access to AdditionalContent

2. THE BRITISH STANDARD (BS)

DOCUMENT NO. DOCUMENT NAME

BS 5099 Electric cables - Voltage levels for spark testing

BS 5467 Electrical cables - Thermosetting insulated, armoured cables for voltages of600/1 000 V and 1 900/3 300 V

BS 6004 Electric cables - PVC insulated, non-armoured cables for voltage up to andincluding 450/750 V, for electric power, lighting and internal wiring.

BS 6469-99.1 Insulating and sheathing materials of electric cables

BS6724 Electric cables - Thermosetting insulated, armoured cables for voltages of600/1 000 V and 1 900/3 300 V, having low emission of smoke andcorrosive gases when affected by fire

BS 7211 Electric cables - Thermosetting, insulated, non-armoured cables for voltagesup to and including 450/750V, for electric power, lighting and internalwiring, and having low emission of smoke and corrosive gases when affectedby fire

BS 7655 Specification for Insulating and sheathing materials for cables.Section 6. General application thermoplastic types.

BS 7655 Specification for Insulating and sheathing materials for cables. Section 1.2General 90°C application

BS 7655-0 Specification for insulating and sheathing materials for cables

BS 7655-1.3 Specification for Insulating and sheathing materials for cables.

BS 7655-4.2 Specification for Insulating and sheathing materials for cables - Part 4. PVCsheathing compounds - Section 4.2: General application

BS 7835 Electric cables - Armoured cables with thermosetting insulation for ratedvoltage from 3.8/6.6kv to 19/33kv having low emission of smoke andcorrosive gases when affected by fire - requirements and test methods.

BS 7846 Electric cables - Thermosetting insulated, armoured, fire resistance cables ofrated 600/1 000 V, having low emission of smoke and corrosive gases whenaffected by fire - Specification.

BS 7870-4.10 LV and MV polymeric insulated cables for use by distribution and generationutilities - Part 4: Specification for distribution cables with extruded insulationfor rated voltage of 11kV and 33 kV - Section 4.10: Single -core 11kV and33kV cables.

BS 7870-4.11 LV and MV polymeric insulated cables for use by distribution and generationutilities - Part 4: Specification for distribution cables with extruded insulationfor rated voltage of 11kV and 33 kV - Section 4.11: Single -core 33kV leadsheathed cables.

BS 7870-4.20 LV and MV polymeric insulated cables for use by distribution and generationutilities - Part 4: Specification for distribution cables with extruded insulationfor rated voltage of 11kV and 33 kV - Section 4.20: Three -core 11kV cables.

BS 7889 Electric cables - Thermosetting insulated, unarmored cables for a voltage of600/1 000 V

BS 7970 Electric cables - metallic wire foil sheat constructions of power cables havingXLPE insulation for rated voltage from 66 kv (Um = 72.5 kv) to132 kv (Um = 145 kv)

BS EN 10257-1: Zinc or Zinc alloy coated non-alloy steel wire for armoring either powercables or telecommunication cables

BS EN 50267-2-1 Common test methods for cables under fire conditions - Test on gasesevolved during combustion of materials from cables.

EN50525-2-31 Electric cables -Low voltage energy cables of rated voltages up to and including 450/750 V(U0/U) -Part 2-31: Cables for general applications -Single core non-sheathed cables with thermoplastic PVC insulation

EN50525-3-41 Electric cables -Low voltage energy cables of rated voltages up to and including 450/750 V(U0/U) -Part 3-41: Cables with special fire performance -Single core non-sheathed cables with halogen-free cross linked insulationand low emission of smoke

BS EN 50363-3 Insulating, sheathing and covering materials for low voltage energy cables -Part 3: PVC insulating compounds

BS EN 50363-4-1 Insulating, sheathing and covering materials for low voltage energy cables

BS EN 50363-5 Insulating, sheathing and covering materials for low voltage energy cables

BS EN 60230 Impulse test on cables and their accessoriesBS EN 60332-1-2 Test on electric and optical fiber cables under fire conditions - Part 1-2: Test

for vertical flame propagation for a single insulated wire or cable - Procedurefor 1kW pre-mixed flame

BS EN 60332-2-2 Test on electric and optical fiber cables under fire conditions - Part 1-2: Testfor vertical flame propagation for a single small insulated wire or cable -Procedure for diffusion flame

BS EN 60332-3-24 Test on electric and optical fiber cables under fire conditions

BS EN 60811-1-1 Insulating and sheathing materials of electric and optical cables - CommonTest methods - Part 1-1: General application - Measurement of thinness andoverall dimensions - Test for determining the mechanical properties

BS EN 60811-1-2 Common test methods for insulating and sheathing materials of electric andoptical cables

BS EN 60811-1-3 Insulating and sheathing materials of electric and optical cables - CommonTest methods

BS EN 60885-3 Electrical test methods for electric cables

BS EN 61034-2 Measurement of smoke density of cables burning under defined condition -Part 2: Test procedure and requirements.

BS EN 62230 Electric cables - Spark-test methodBS EN ISO 14001 Environmental management systems - Requirements with guidance for use

BS EN ISO 6892-1 Metallic materials - Tensile testing Part 1: Method of test at ambienttemperature.

BS EN ISO 9001 Quality management system - Requirements

BS OSHAS 18001 Occupational health and safety management system - requirements

BS 7655: Section 6.1 Specification for Insulating and sheathing materials for cables

SELECTION OF CABLES:

It is essential to consider the specific system and installation conditions to be able to select the right

cable.

The following criteria should be taken into account to choose the suitable cable.

1. Cable Laying:

Depending on the nature of the cable system (fixed or mobile) a rigid or flexible cable should be

selected. The appropriate protection of a cable will be determined taking into account the

mechanical stress and presence of chemical, oils or hydrocarbons.

2. Ambient and ground Temperature

The quality of the material used to manufacture a cable shall be determined according to the

maximum and minimum temperatures to which the cable will be submitted.

3. Nature of Conductors

Copper or aluminum conductors can be used.

For equal current rating aluminum cross-section

= 1.28 copper cross-section

For equal ohmic resistance aluminum cross-section

= 1.65 copper cross-section

For copper, sector shaped conductors are available

On request from 70 mm2 and above

4. Maximum operating voltage.

5. Insulation level.

6. Load to be carried.

7. Frequency.

8. Magnitude and duration of possible overload “Emergency current”.

9. Magnitude and duration of short-circuit current for conductor and screen.

10.Length of line.

11.Voltage drop.

12.Chemical and physical properties of soil.

13.Min. and Max. ambient air temperatures and soil temperature.

14.Specification and requirements to be follow.

Metal

Copper (annealed)

Relative ConductivityCopper 100%

100

Electrical Resistivityat 20 °C ohm. m (10-8)

1.7241

Temperature Coefficient ofResistance per °C

0.00393Copper (hard drawn) 97 1.777 0.00393Tinned copper 95 - 97 1.741 - 1.814 0.00393Aluminium 61 2.8264 0.00403

VOLTAGE:

The VOLTAGE Is the electric potential difference between two points, or the difference in electric

potential energy of a unit charge transported between two points, The standard rate voltage are

defined by three values Uo / U (Um), where :

Uo = rated rms power frequency voltage, core to screen or sheath.

U = rated rms power frequency voltage, core to core.

Um = max. rms power frequency voltage, core to core.

Uo / U(kV)

0.6/1 1.8/3 3.6/6 6/10 8.7/15 12/20 18/30 38/66 76/132 127/220Um(kV)

1.2 3.6 7.2 12 17.5 24 36 72.5 145 245

Cable design for 6/10, 12/20 and 18/30 kV is applicable for 6.35/11, 12.7/22 and 19/33 kV respectively.

METALS USED FOR CABLES:

Electrical Properties:

MetalRelative

Conductivity

Electrical Resistivityat 20 °C ohm. m

(10-8)

TemperatureCoefficient of

Resistance per °CCopper (annealed) 100 1.7241 0.00393Copper (hard drawn) 97 1.777 0.00393Tin copper 95 - 97 1.741 - 1.814 0.00393Aluminum 61 2.8264 0.00403Lead 8 21.4 0.0040

Physical Properties:

Property Unit Copper Aluminum Lead

Density at 20 °C kg / m3 8890.00 2703.00 11340.00

Coeff. thermal expansion Per °C x 10-6 17.00 23.00 29.00Melting point °C 1083.00 659.00 327.00Thermal conductivity W/cm °C 3.80 2.40 0.34

Ultimate tensile strength Mn/m2 225.00 70-90 -

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1. NOMINAL VOLTAGE

The Nominal voltage is to be expressed with two

values of alternative current Uo/U in V (volt)

Uo/U : Phase to earth voltage

Uo : Voltage between conductor and earthU : Voltage between phases (conductors)

2. RESISTANCE

The Values of conductor DC resistance are

dependent on temperature as given by :

Rt=R20x[l+α20(t-20)] /kmRt : conductor DC resistance at t ° C /km

R20 : conductor DC resistance at 20 ° C /km

t : operating temperature ° C

α : resistance temperature coefficient

= 0.00393 for copper

= 0.00403 for aluminum

Generally DC resistance is based on IEC 60228

To calculate AC resistance of the conductor

at the operating temperature as the following:

RAC = Rt x[ 1+ ys + yp ]ys : skin effect factor

yp : proximity effect

Generally AC resistance is based on IEC 60287

3. CAPACITANCE

μF/km

C : Operating capacitance μF/km

D : Diameter over insulation mm

d : Conductor diameter mm

Єr :Relative permittivity of insulation material

Єr = 4.8 for PVC

Єr = 2.3 for XLPE

4. INDUCTANCE

L=K+0.2 ln ( 2s/d) mH/kmL : Inductance mH/km

K :Constant depends on number of wires of conductor

d: Conductor diameter

S : Axial spacing between cables (Trefoil formation )S : 1.26 x axial spacing between cables ( Flat formation)

5. REACTANCE

The inductive reactance per phase of a cable may be

obtained by the formula:

X = 2 π f L x 10-3 /kmX: Reactance /km

f : Frequency Hz

L : Inductance mH/km

6. IMPEDANCE

Z = /kmZ :Phase impedance of cable /km

Rac : AC resistance at operating temperature /km

X : Reactance /km

7. INSULATION RESISTANCE

R =

R : Insulation resistance at 20° C MΩ.km

D : Insulated conductor diameter mmd : Conductor diameter mm

1000 * LN (D/d)

2 * π


1. NOMINAL VOLTAGE





2. RESISTANCE















3. CAPACITANCE

μF/km





Єr = 4.8 for PVC

Єr = 2.3 for XLPE

4. INDUCTANCE





5. REACTANCE




f : Frequency Hz


6. IMPEDANCE



X : Reactance /km


R =



1000 * LN (D/d)

2 * π

22 XR ac


1. NOMINAL VOLTAGE





2. RESISTANCE















3. CAPACITANCE

μF/km





Єr = 4.8 for PVC

Єr = 2.3 for XLPE

4. INDUCTANCE





5. REACTANCE




f : Frequency Hz


6. IMPEDANCE



X : Reactance /km


R =



1000 * LN (D/d)

2 * π

8.CHARGING CURRENT

I = Uo x 2Π f x C x 10-6

I : Charging current A/km

Uo : voltage between phase and earth V

C : Capacitance to neutral μF/km

9. DIELECTRIC LOSSES

D = 2 π f C 2Uo tan δ 10-6 watt/km/phase

D : Dielectric losses watt/km/phase

Uo : Voltage between phase and earth V

C : Capacitance to neutral μF/km

tan δ : Dielectric power factor

10. CABLE SHORT CIRCUIT CAPACITY

ISC(t) = ISC(1) / √t kA

ISC(t): Short circuit for t second kAISC(1): Short circuit for 1 second kA

Data about short circuit are tabulated from table 9 to table11

11. VOLTAGE DROP

When the current flows in conductor, there is a voltage

drop between the ends of the conductor. For low voltage

cable network of normal operation.

We recommend voltage drops not to exceed:

3 % for lighting wire systems

5 % for driving force wire systems

10 % on starting time for motors

To calculate voltage drop as the following:

1. In DC∆ =2. For single phase circuit AC:∆ = ( ∅ + ∅)3. For three phase circuit AC:∆ = √ ( ∅ + ∅)

∆u : Voltage drop V

Rc : conductor resistance in D.C. at operatingtemperature (/km)

Ra : conductor resistance in A.C. at operatingtemperature (/km)

L : core inductance (H/km)ω : pulsation equal to 2 π f (314 for f= 50 Hz)

I : Load current A

X : Reactance /km

ℓ : Length km

cosΦ : Power factor

- Relation between cosΦ and sinΦ as following:∅ 1.0 0.9 0.8 0.71 0.6 0.5∅ 0.0 0.44 0.6 0.71 0.8 0.87

CCUURRRREENNTT RRAATTIINNGG AASSSSUUMMPPTTIIOONNSS::

THE ELECTRIC CURRENT: is a flow of electric charge. In electric circuits this charge is often carriedby moving electrons in a wire. It can also be carried by ions in an electrolyte, or by both ions andelectrons such as in a plasma.

The calculation of the current ratings, Current rating equations(100% load factor) and

calculation of losses are based on IEC 60287 series , and the values of Current ratings for

underground applications (In Duct or Direct Buried) are derived from the latest issue of ERA

Report ‘Current Rating Standards 69.30 Part V’. and the values of current ratings are verified with

the tabulated value in IEC 60364-5-52.

The Current Carry Capacity calculated based on one circuit installed thermally isolated from other

circuits or any other heat source.

Ambient Air Temperature : 30 °CAmbient Ground Temperature : 20°C Depthof laying in ground : 0.70 mSoil Thermal Resistivity :2.5 °K.m/W

For other installation conditions or any value of different air/ ground temperature, depth of laying,

different soil thermal resistivity the customer is divided to multiply the tabulated current rating by the

de-rating factor values as in tables 1 to 8.



























DDEERRAATTIINNGG FFAACCTTOORRSS

1. INSTALLATION CONDITIONS FOR CABLES IN AIR

Table 1: Rating factors for ambient air temperatures other than 30 °C to be applied to thecurrent-carrying capacities for cables in the air:

Ambienttemperature

a °C

Insulation

PVC XLPEandEPR

Mineral a

PVC coveredor bare andexposed totouch 70 °C

Bare notexposed totouch 105°C

10 1,22 1,15 1,26 1,1415 1,17 1,12 1,20 1,1120 1,12 1,08 1,14 1,0725 1,06 1,04 1,07 1,0430 1,00 1,00 1,00 1,0035 0,94 0,96 0,93 0,9640 0,87 0,91 0,85 0,9245 0,79 0,87 0,78 0,8850 0,71 0,82 0,67 0,8455 0,61 0,76 0,57 0,8060 0,50 0,71 0,45 0,7565 – 0,65 – 0,7070 – 0,58 – 0,6575 – 0,50 – 0,6080 – 0,41 – 0,5485 – – – 0,4790 – – – 0,4095 – – – 0,32

a For higher ambient temperatures, consult the manufacturer.

2. INSTALLATION CONDITIONS FOR DIRECT BURIAL CABLESFor a cable installed direct buried, the following tables will be used to calculate the current ratesbased on the actual soil thermal resistivity, Ground ambient temperature and the Depth of Laying.

Table 2: Rating factors for ambient ground temperatures other than 20 °C to be applied to thecurrent-carrying capacities for cables in ducts in the ground:

Groundtemperature

°C

Insulation

PVC XLPE and EPR

10 1,10 1,0715 1,05 1,0420 1,00 1,0025 0,95 0,9630 0,89 0,9335 0,84 0,8940 0,77 0,8545 0,71 0,8050 0,63 0,7655 0,55 0,7160 0,45 0,6565 – 0,6070 – 0,5375 – 0,4680 – 0,38

Table 3: Rating factors for cables buried direct in the ground or in buried ducts for soil thermalresistivities other than 2,5 K·m/W to be applied to the current-carrying capacities for referencemethod D:

Thermal resistivity, K·m/W 0,5 0,7 1 1,5 2 2,5 3Correction factor for cables inburied ducts

1,28

1,20

1,18

1,1 1,05

1 0,96Correction factor for direct

buried cabl es1,88

1,62

1,5 1,28

1,12

1 0,90NOTE 1 The correction factors given have been averaged over the range of conductor sizes and types of

installation included in Tables B.52.2 to B.52.5. The overall accuracy of correction factors is within ±5 %.NOTE 2 The correction factors are applicable to cables drawn into buried ducts; for cables laid direct in theground the correction f actors for thermal resistivities less than 2, 5 K·m/W will be higher. W here more precisevalues are required they may be calculated by methods given in the IEC 60287 series.NOTE 3 The correction factors are applicable to ducts buried at depths of up to 0,8 m.NOTE 4 It is assumed that the soil properties are uniform. No allowance had been made for the possibilityy ofmoisture migration which can lead to a region of high thermal resistivity around the cable. If partial drying out ofthe soil is foreseen, the permissible current rating should be derived by the methods specified in the IEC 60287series.

3. INSTALLATION CONDITIONS FOR CIRCUIT GROUPS

Table 4: Rating factors for one circuit or one multi-core cable or for a group of more than onecircuit:

To beused withcurrent-carrying

capacities,reference

Arrangement Number of circuits or multi-core cables

Ite

m (cablestouching)

1 2 3 4 5 6 7 8 9 12 16 20

1 Bunched in air,on a surface,embedded orenclosed

1,00 0,80 0,70 0,65 0,60 0,57 0,54 0,52 0,50 0,45 0,41 0,38 B.52.2

to B.52.13

Methods Ato F

2 Single layer onwall, floor orunperforatedcable traysystems

1,00 0,85 0,79 0,75 0,73 0,72 0,72 0,71 0,70

B.52.2 to

B.52.7

3 Single layerfixed directlyunder awooden ceiling

0,95 0,81 0,72 0,68 0,66 0,64 0,63 0,62 0,61 No furtherreduction factor for

more than ninecircuits or multicore

cables

Method C

4 Single layer ona perforatedhorizontal orvertical cabletray systems

1,00 0,88 0,82 0,77 0,75 0,73 0,73 0,72 0,72

B.52.8

to B.52.13

5 Single layer oncable laddersystems orcleats etc.,

1,00 0,87 0,82 0,80 0,80 0,79 0,79 0,78 0,78 Methods Eand F

NOTE 1 These factors are applicable to uniform groups of cables, equally loaded.

NOTE 2 W here horizontal clearances between adjacent cables exceeds twice their overall diameter, no reduction factor need be applied.

NOTE 3 The same factors are applied to:

– groups of two or three single-core cables;

– multi-core cables.

NOTE 4 If a system consists of both two- and three-core cables, the total number of cables is taken as the number of circuits, and thecorresponding f actor is applied to the tables for two loaded conductors for the two-core cables, and to the tables f or three loadedconductors for the three-core cables.NOTE 5 If a group consists of n single-core cables it m ay either be considered as n/2 circuits of two loaded conductors or n/ 3 circuits ofthree loaded conductors.

a a

Table 5: Rating factors for more than one circuit, cables laid directly in the ground – Single-core ormulti-core cables:

Nu

mb

er

of

circ

uit

s

Cable to cable clearancea

Nil Onecablediameter

(cablestouching)

0,125 m 0,25 m 0,5 m

2 0,75 0,80 0,85 0,90 0,90

3 0,65 0,70 0,75 0,80 0,85

4 0,60 0,60 0,70 0,75 0,80

5 0,55 0,55 0,65 0,70 0,80

6 0,50 0,55 0,60 0,70 0,80

7 0,45 0,51 0,59 0,67 0,76

8 0,43 0,48 0,57 0,65 0,75

9 0,41 0,46 0,55 0,63 0,74

12 0,36 0,42 0,51 0,59 0,71

16 0,32 0,38 0,47 0,56 0,38

20 0,29 0,35 0,44 0,53 0,66

a Multi-core cables

a Single-core cables

NOTE 1 Values given apply to an installation depth of 0,7 m and a soil thermalresistivity of 2,5 K·m /W . They are average values for the range of cable sizes andtypes quoted for Tables B.52.2 to B.52.5. The process of averaging, together withrounding off, can result in some cases in errors up to ± 10 %. (W here m ore precisevalues are required they may be calculated by methods given in IEC 60287-2-1.)NOTE 2 In case of a thermal resistivity lower than 2, 5 K·m /W the corrections factorscan, in general, be increased and can be calculated by the methods given in IEC60287-2-1.NOTE 3 If a circuit consists of m parallel conductors per phase, then fordetermining the reduction factor, this circuit should be considered as m circuits.

Table 6: Rating factors for more than one circuit, cables laid in ducts in the ground:

A) Multi-core cables in single-w a y ducts

Numberof cables

Duct to duct clearance a

Nil

(ductstouching)

0,25 m 0,5 m 1,0 m

2 0,85 0,90 0,95 0,953 0,75 0,85 0,90 0,95

4 0,70 0,80 0,85 0,90

5 0,65 0,80 0,85 0,90

6 0,60 0,80 0,80 0,90

7 0,57 0,76 0,80 0,88

8 0,54 0,74 0,78 0,88

9 0,52 0,73 0,77 0,87

10 0,49 0,72 0,76 0,86

11 0,47 0,70 0,75 0,86

12 0,45 0,69 0,74 0,85

13 0,44 0,68 0,73 0,85

14 0,42 0,68 0,72 0,84

15 0,41 0,67 0,72 0,84

16 0,39 0,66 0,71 0,83

17 0,38 0,65 0,70 0,83

18 0,37 0,65 0,70 0,83

19 0,35 0,64 0,69 0,82

20 0,34 0,63 0,68 0,82

B) Single-core cables in non-magnetic single-w a y ducts

Number ofsingle- corecircuits oftwo or threecables

Duct to duct clearance b

Nil

(ductstouching)

0,25 m 0,5 m 1,0 m

2 0,80 0,90 0,90 0,953 0,70 0,80 0,85 0,90

4 0,65 0,75 0,80 0,90

5 0,60 0,70 0,80 0,90

6 0,60 0,70 0,80 0,90

7 0,53 0,66 0,76 0,87

8 0,50 0,63 0,74 0,87

9 0,47 0,61 0,73 0,86

10 0,45 0,59 0,72 0,85

11 0,43 0,57 0,70 0,85

12 0,41 0,56 0,69 0,84

13 0,39 0,54 0,68 0,84

14 0,37 0,53 0,68 0,83

15 0,35 0,52 0,67 0,83

16 0,34 0,51 0,66 0,83

17 0,33 0,50 0,65 0,82

18 0,31 0,49 0,65 0,82

19 0,30 0,48 0,64 0,82

20 0,29 0,47 0,63 0,81

a Multi-c ore cables

b Single-core cables

NOTE 1 Values given apply t o an installation depth of 0,7 m and a soil t herm alresistivity of 2,5 K·m/W . They are average values for the range of cable sizes andtypes quoted for Tables B.52.2 to B.52.5. The process of averaging, togetherwith rounding off, can result in some cases in errors up to ±10 %. W here more precise values are required they may be calculated by methods given in the IEC60287series.NOTE 2 In case of a thermal resistivity lower than 2, 5 K·m/W the corrections factorscan, in general, be increased and can be calculated by the methods given in IEC60287-2-1.NOTE 3 If a circuit consists of n parallel conductors per phase, then for determiningthe reduction factor this circuit shall be considered as n circuits

Table 7: Rating factors for group of more than one multi-core cable to be applied to referencecurrent-carrying capacities for multi-core cables in free air:

Method of installation in Table A.52. 3IEC 60364-5-52

Number oftrays

orladder

s

Number of cables per tray or ladder

1 2 3 4 6 9

Perforated cable

traysystems

(note 3)

31

Touching1

2

3

6

1,00

1,00

1,00

1,00

0,88

0,87

0,86

0,84

0,82

0,80

0,79

0,77

0,79

0,77

0,76

0,73

0,76

0,73

0,71

0,68

0,73

0,68

0,66

0,64

Spaced 1

2

3

1,00

1,00

1,00

1,00

0,99

0,98

0,98

0,96

0,95

0,95

0,92

0,91

0,91

0,87

0,85

–

–

–

Verticalperforatedcable traysystems

(note4)

31

Touching

1

2

1,00

1,00

0,88

0,88

0,82

0,81

0,78

0,76

0,73

0,71

0,72

0,70

Spaced

1

2

1,00

1,00

0,91

0,91

0,89

0,88

0,88

0,87

0,87

0,85

–

–

Unperforat edcable traysystems

31

Touching

1

2

3

6

0,97

0,97

0,97

0,97

0,84

0,83

0,82

0,81

0,78

0,76

0,75

0,73

0,75

0,72

0,71

0,69

0,71

0,68

0,66

0,63

0,68

0,63

0,61

0,58

Cableladder

systems,cleats, etc.

(note3)

32

33

34

Touching

1

2

3

6

1,00

1,00

1,00

1,00

0,87

0,86

0,85

0,84

0,82

0,80

0,79

0,77

0,80

0,78

0,76

0,73

0,79

0,76

0,73

0,68

0,78

0,73

0,70

0,64

Spaced

1

2

3

1,00

1,00

1,00

1,00

0,99

0,98

1,00

0,98

0,97

1,00

0,97

0,96

1,00

0,96

0,93

–

–

–

NOTE 1 Values given are averages for the cable types and range of conductor sizes considered in Tables A.52.8 toA.52.13. The spread of values is generally less than 5 %.

NOTE 2 Factors apply to single layer groups of cables as shown above and do not apply when cables are installed inmore than one layer touching each other. Values for such installations may be significantly lower and has to bedetermined by an appropriate method.

NOTE 3 Values are given for vertical spacing between cable t rays of 300 mm and at least 20 mm between cabletrays and wall. For closer spacing the factors should be reduced.

NOTE 4 Values are given for horizontal spacing between cable t rays of 225 mm with cable trays mounted back t oback. For closer spacing the factors should be reduced.

Table 8: Rating factors for groups of one or more circuits of single-core cables to be applied toreference current-carrying capacity for one circuit of single- core cables in free air

Method of installation in TableA.52. 3 IEC 60364-5-52

Numberof traysorladders

Number of three-phase circuits per trayor ladder

Use as amultiplierto current-carryingcapacity

for

1 2 3

Perforated cable

traysystems

(note 3)

31

Touching

1

2

3

0,98

0,96

0,95

0,91

0,87

0,85

0,87

0,81

0,78

Three cablesinhorizontalformation

Verticalperforated cable

traysystems

(note4)

31

Touching

1

2

0,96

0,95

0,86

0,84

–

–

Three cablesin vertical

formation

Cableladdersystems,

cleats, etc.

(note 3)

32

33

34Touching

1

2

3

1,00

0,98

0,97

0,97

0,93

0,90

0,96

0,89

0,86

Three cablesinhorizontal

Touching

Perforated cable

traysystems

(note 3)31

1

2

3

1,00

0,97

0,96

0,98

0,93

0,92

0,96

0,89

0,86

Three cablesin trefoilformation

Verticalperforated cable

traysystems

(note4)

31

Spaced

1

2

1,00

1,00

0,91

0,90

0,89

0,86

Cableladder

systems,cleats, etc.

(note 3)

32

33

34

1

2

3

1,00

0,97

0,96

1,00

0,95

0,94

1,00

0,93

0,90

NOTE 1 Values given are averages for the cable types and range of conductor sizes considered in Table B.52.8to B.52.13. The spread of values is generally less than 5 %.NOTE 2 Factors are given for single layers of cables (or trefoil groups) as shown in the table and do not applywhen cables are installed in more than one layer touching each other. Values f or such installations may besignificantly lower and should be determined by an appropriate method.NOTE 3 Values are given for vertical spacing between cable trays of 300 mm and at least 20 mm between cabletrays and wall. For closer spacing the factors should be reduced.NOTE 4 Values are given for horizontal spacing between cable trays of 225 mm with cable trays mounted backto back. For closer spacing the factors should be reduced.NOTE 5 For circuits having more than one cable in parallel per phase, each three phase set of conductorsshould be considered as a circuit for the purpose of this table.NOTE 6 If a circuit consists of m parallel conductors per phase, then for determining the reduction factor this circuitshould be considered as m circuits.

SSHHOORRTT CCIIRRCCUUIITT RRAATTIINNGG –– CCOONNDDUUCCTTOORRSS

The permissible short-circuit currents as presented in figures 1 to 6 are calculated in accordance withIEC 60724:2008.

The calculation method neglects heat loss and is accurate enough for the majority of practicalcases. Any error is on the safe side. However, caution should be exercised when using large sizeconductors and an installation radius less than 8 x cable diameter where high deforming forcesmay occur. Where such conditions cannot be avoided, it is recommended to reduce the shortcircuit rating by 15% or contact SCC technical department.

The following formulae have been derived from 60724:2008

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

I : Short-circuit current (kA)k : Duration of short-circuit current t (sec.)

S : Cross-sectional area of conductor (mm2)

Maximum Short circuit temperature for cable components:

Material Item Temp. °C

Insulation PVC insulation140 For C.S.A. <300

mm2

160 For C.S.A. ≥300mm2

XLPE insulation 250

Sheathing PVC sheathing 200

LDPE sheathing 150

HDPE sheathing 180

StIk *)/155.0(

StIk *)/1038.0(

StIk *)/075.0(

StIk *)/068.0(

StIk *)/143.0(

StIk *)/0937.0(

PVC (based on 70°C type TI-1 or 90°C type TI-3) cables copper and aluminumconductor:

Short Circuit Ratings for 1 second in k Amp

ConductorSize

Copper Conductor Aluminum Conductor

10 1.2 0.86

16 1.8 1.1

25 2.85 1.8

35 3.55 2.55

50 5 3.4

70 6.9 4.9

95 10.9 6.8

120 11.8 8.5

150 15.3 11

185 18.7 13

240 23.6 16.5

300 30.1 22.5

400 41.2 29.5

500 51.5 36

630 64.9 45.5

800 82.4 62

1000 103 78

XLPE cables copper and aluminum conductor:

Short Circuit Ratings for 1 second in k amp

ConductorSize

Copper Conductor Aluminum Conductor

10 1.43 0.94

16 2.29 1.5

25 3.58 2.35

35 5 3.29

50 7.15 4.7

70 10.01 6.58

95 13.59 8.93

120 17.16 11.28

150 21.45 14.1

185 26.46 17.39

240 34.32 22.56

300 42.9 28.2

400 57.2 37.6

500 71.5 46.09

630 90.09 59.22

800 114.4 75.2

1000 143 94

Graph 1 : PVC (90 °C type) insulated cables short circuit (Copper Conductor):

Duration of short circuit in seconds – t(sec.)

Fau

lt C

urr

en

t K

iloa

mp

ere

-I(

kA

)

Graph 2 : PVC (90 °C type) insulated cables short circuit (Aluminum Conductor):


Fau

lt C

urr

en

t K

iloa

mp

ere

-I(

kA

)

Graph 3 : XLPE (90 °C type) insulated cables short circuit (Copper Conductor):


Fau

lt C

urr

en

t K

iloa

mp

ere

-I(

kA

)

Graph 4 : XLPE (90 °C type) insulated cables short circuit (Aluminum Conductor)


Fau

lt C

urr

en

t K

iloa

mp

ere

-I(

kA

)

IINNSSTTAALLLLAATTIIOONN RREECCOOMMMMEENNDDAATTIIOONNSS

Instructions for transport, handling, storage of drums and laying of the cables.

The cables, whether they are armoured or unarmoured, are manufactured with high quality materials

allowing long storage, handling, transport and unreeling subject to the following recommendations.

Before acceptance of a shipment, all reels must be inspected. Any sign of damage should be noticed

to the carrier (broken flanges, damaged wrapping or or lagging, interlocked flanges, broken reels…)

I. Transport & Handling:The wooden drums must be always carried vertically. They must be fixed and properly chocked with

care on the vehicle, on the wagon and on the ship, in order to avoid any exterior damages.

Correct Incorrect

The unloading and the different handling will be done carefully with liftingequipments.

In case of handling with a crane, an axle is used in crossing the drum centre, lifted from both ends by

two slings. It must have length equal, at least, to the width of the drum. It prevents the lifting cable or

chain from pressing against the reel flanges.

Correct Incorrect

In case of handling with a forklift truck, the drum is laid vertically with care on the forks.

Correct Incorrect

II. Rolling directionsWhen a reel is rolled from one point to another, it must be rolled “only” in the direction shown by

arrows as printed on the reel.

Correct Incorrect

III. StorageCables can be stored, with site temperature limits: -15 + 60 degrees celcius. For Outdoor location the

maximum relative humidity is 90% at all temperatures. The cables drums must be appropriately

wedged, transported and stored in a vertical position (never laid on flange) on a flat, dry and solid

ground that is not liable to settlement.

They must be protected to avoid any mechanical risk and exterior shocks.

The original wooden lags have to be kept until the cable unreeling to ensure a good protection of the

cable. The both ends of the cable (inner & outer ends) have to be watertight in order to avoid

penetration of water or humidity inside the cable. Thermo retractable polyethylene caps must be fixed

on both ends.

IV. Loading, Unloading and Movement of Cable Drums:Lifting, loading & unloading of cable drums should be performed using slings fitted to shafts inserted

through the cable drum hubs. Spreader bars shall be used where required to avoid pressure on the

drum flanges.

If Forklifts are used, both cable drum flanges must sit on the forks of the fork lift

Cable drums may only be moved short distances by “Drum rolling” and drums must always be rolled

in the direction as indicated on the drum flanges.

V. Ultraviolet ProtectionCable drums with cable that is not “UV” resistant shall at times be covered to protect the cable from

“UV” damage.

VI. Laying of the cables:

Laying temperature:Installation shall be postponed if the temperature is lower than- 5 degrees celcius. Below this temp.

cables shall be stored in a room where temp. is higher than 10 degrees celcius at least 24hours

before unreeling. Cables shall be unreeled as soon as they are removed from the room and the usual

bending radius should be increased as possible.

Pulling strength:The pulling strengths applied directly to the copper or aluminum cores of the cables should not

exceed:

- 5daN/mm2 of cross section for copper conductors

-3daN/mm2 of cross section for aluminum conductors.

The pulling must be regular without shock and continuously checked by a dynamometer (esp. in case

of using a winch).

Bending radius:During the unreeling, the bending radius shall be, at least, “twice the static bending radius (as

specified in our technical data sheets)”.

Cables Unreeling:The drum shall be settled on jacks by using a spindle through the central hole of the drum.

The unreeling speed shall be monitored at any moment.

The cables must be reeled “only in the opposite direction indicated by the arrow” printed on the

flange of the drum (“do not unreel the cable in the same direction of the arrow”).

Correct Incorrect

Cable Wind direction and end mark shall be indicated on both the flanges. While unreeling, the

cables shall not be twisted, waved or buckled.

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