500kV XLPE电缆参数

500kV XLPE电缆参数BRUGG公司的产品资料HIGH VOLTAGE XLPE CABLE SYSTEMS

HIGH VOLTAGE XLPE CABLE SYSTEMS

Technical User Guide

500kV XLPE电缆参数BRUGG公司的产品资料HIGH VOLTAGE XLPE CABLE SYSTEMS

Content

1.General information on High Voltage XLPE Cable Systems ______________

1.1.Introduction _______________________________________________1.2.Cable selection process _____________________________________1.3.Service life ________________________________________________2.Cable layout and system design ___________________________________

2.1.Electrical field _____________________________________________2.2.Capacity, charging current ___________________________________2.3.Inductance, Inductive reactance _______________________________2.4.Losses in cables ___________________________________________2.5.Earthing methods, induced voltage _____________________________

3334666778

2.6.Short-circuit current capacity __________________________________102.7.Dynamic forces ____________________________________________112.8.Metallic sheath types ________________________________________113.XLPE Cable System Standards ____________________________________134.Technical data sheets ___________________________________________14

500 / 290kV XLPE Cable400 / 230kV XLPE Cable345 / 200kV XLPE Cable220 / 127kV XLPE Cable132 / 76kV XLPE Cable

5.XLPE Cable Reference Projects from Brugg __________________________20

500kV XLPE电缆参数BRUGG公司的产品资料HIGH VOLTAGE XLPE CABLE SYSTEMS

1. General information on High Voltage Cable Systems1.1 Introduction

The development of high voltage XLPE Cable Systems goes back to the 1960’s. Since then production and material technology have improved significantly, providing reliable and maintenance-free products to the utility industry.At present, numerous high voltage XLPE cable systems with nominal voltages up to 500kV and with circuit lengths up to 40km are in operation worldwide.

Cable systems are equipped with accessories, which have passed the relevant type tests pursuant to national and international standards, such as long-duration tests. As one of the first XLPE cable manufacturers worldwide Brugg Cables passed a Prequalification Test on a 400kV XLPE Cable System according to the relevant international standard IEC62067 (2001).This test required one year of operation, along with the thermal monitoring of all cables, joints and terminations installed. It was successfully completed at CESI Laboratory in Milan, Italy in

2004.

Typical sample of a 2500mm2500kV XLPE cable

Test Setup of Prequalification Test

As one of just a few providers worldwide, Brugg Cables can offer a broad range of both XLPE cables (up to 500kV) and oil-filled cables (up to 400

kV) as well as their accessories.

Modern XLPE cables consist of a solid cable core, a metallic sheath and a non-metallic outer covering. The cable coreconsists of the conductor, wrapped with semiconducting tapes, the inner semiconducting layer, the solid main insulation and the outer semiconducting layer. These three insulation layers are extruded in one process. The conductor of high voltage cables can be made of copper or aluminium and is either round stranded of single wires or additionally segmented in order to to reduce the current losses.

Depending on the customer’s specifications it can be equipped with a longitudinal water barrier made of hygroscopic tapes or powder. The main insulation is cross-linked under high pressure and temperature. The metallic sheath shall carry the short-circuit current in case of failure. It can be optionally equipped with fibers for temperature monitoring. Finally, the outer protection consists of extruded Polyethylene (PE) or Polyvinylchloride (PVC) and serves as an anti-corrosion layer. Optionally it can be extruded with a semiconducting layer for an after-laying test and additionally with a flame-retardant material for installation in tunnels or buildings if required.

1.2 Cable selection process

This broad product range together with a systematic analysis of the technical requirements enables the user to find the right solution for every

application. Additionally, our consulting engineers can assist you in the development of customized solutions.

500kV XLPE电缆参数BRUGG公司的产品资料HIGH VOLTAGE XLPE CABLE SYSTEMS

Selection process of cable design

1.3 Service life

Cables are among theinvestment goods with a high service life of over 40 years. The service life of a cable is defined as its operating time. It is influenced by the applied materials, the constructive design, the production methods and the operating parameters.

Regarding the material technology Brugg Cables has many years of experience and investigation together with extensive experience in the field of cable systems gained over the years.

Lifetime curve of XLPE cables

500kV XLPE电缆参数BRUGG公司的产品资料HIGH VOLTAGE XLPE CABLE SYSTEMS

The following rules apply for all organic insulationmaterials in general:

-An increase of the operating temperature by 8 to 10°C reduces the service life by half.

-An increase of the operating voltage by 8 to 10% reduces the service life by half.The influence of the voltage on the service life is expressedin the following service life law(see graph above):t En= const

with

E = Maximum field strength at the conductor surface of the cable

n = Exponent stating the slopet = Time

Other operating parametersof decisive importance are:

-Voltage level and transient voltages such as switch operations, lightning impulses

-Short-circuit current and related conductor temperatures

-Mechanical stress

-Ambient conditions like humidity, ground temperatures, chemical influences-Rodents and termites in the vicinity

500kV XLPE电缆参数BRUGG公司的产品资料HIGH VOLTAGE XLPE CABLE SYSTEMS

2. Cable layout and system design

The dimensioning of a high voltage cable system is always based on the specifications and demands of the project at hand. The following details are required for calculation:-The type of cable insulation

-Nominal and maximum operating voltage

-Short-circuit capacity or short-circuit current with

statement of the effect time

-Transmission capacity or nominal current

-Operating mode: permanent operation or partial

load operation (load factors)

-Ambient conditions:

Type of installation Ambient temperatures (incl. external effects) Special thermal resistance of the groundThe calculation of the admissible load currents (ampacity) and the cable temperatures is performed in accordance with the IEC publication 60287. At Brugg Cables, professional computer programs are in use for the calculation of the various cable data.

2.1 Electrical field

In initial approximation, the main insulation of a high voltage XLPE cable can be regarded as a homogenous cylinder. Its field distribution or voltage gradient is therefore represented by a homogenoius radial field. The value of the voltage gradient at a point x within the insulation can therefore be calculated as:

Ex

Uo ra rx ln r

i

(kV/mm)

with

Uo= Operating voltage (kV)rx= Radius at position x (mm)

ra= External radius above the insulation (mm)ri= Radius of the internal field delimiter (mm)The electrical field strength is highest at the inner semiconductor and lowest above the insulation (below the external semiconductor, rx= ra).

Field distribution within a high voltage XLPE cable

2.2 Capacity, charging current

The operating capacity depends on the type of insulation and its geometry. The following formula applies for all radial field cables:

d = Diameter over inner semiconducter (mm)

Single-core high voltage XLPE cables represent an extended capacitance with a homogenous radial field distribution. Thus a capacitive charging current to earth results in the following formula:

5.56 r

Cb ( F/km)

D ln d

with

r= Relative permittivity (XLPE: 2,4)D = Diameter over main insulation (mm)

IC U0 Cb(A/km)

with

Uo= Operating voltage (kV) = Angular frequency (1/s)Cb= Operating capacity (µF/km)

500kV XLPE电缆参数BRUGG公司的产品资料HIGH VOLTAGE XLPE CABLE SYSTEMS

2.3 Inductance, Inductive reactance

The operating inductance in general depends on the relation between the conductor axis spacing and the external conductor diameter. Practically, two cases have to be considered:Laying formation: trefoil

Laying formation: flat

aa

2r

The meanoperating inductance for the three phases calculates as

a

2r

a'

Lm 2 10 4 ln 0,779 r

L

with

(H/km)

The operating inductance for all three phases calculates as:

a

L 2 10

4

a ln 0,779 r

L (H/km)

a’ = 2 aMean geometric distance (mm)a = Phase axis distance (mm)

rL= Diameter of conductor over inner

semiconducting layer (mm)The inductive reactance of the cable system calculates for both cases as:X L[ /km]with

= Angular frequency (1/s)

with

a = Phase axis distance (mm)

rL= Diameter of conductor over inner

semiconducting layer (mm)

2.4 Losses in cables

Voltage-dependent and current-dependent power losses occur in cables.I)

Voltage-dependent losses

Voltage-dependent power losses are caused by polarization effects within the main insulation. They calculate to:

II)Current-dependent losses

The current-dependent losses consist of the following components:

-Ohmic conductor losses-Losses through skin effect

-Losses through proximity effect-Losses in the metal sheath

Ohmic conductor losses

The ohmic losses depend on material and temperature. For the calculation of the ohmic losses RI², the conductor resistance stated for 20°C (Ro) must be converted to the operating temperature of the cable:R = Ro[1 + ( -20°C )] [ /km]with

= 0.0393 for Copper = 0.0403 for Aluminium

The conductor cross-section and admissible DC resistances at 20°C (Ro) correspond to the standards series pursuant to IEC

60228.

Pd Uo2 Cb tan (W/km)

with

Uo= Operating voltage (kV) = Angular frequency (1/s)Cb= Operating capacity (µF/km)

Dielectric power loss factors tan for typical cable insulations are:

–4

XLPE(1,5 to 3,5) 10EPR(10 to 30) 10–4Oil cable(18 to 30) 10–4

500kV XLPE电缆参数BRUGG公司的产品资料HIGH VOLTAGE XLPE CABLE SYSTEMS

Losses through skin effect

The losses caused by the skin effect, meaning the displacement of the current against the conductor surface, rise approximately quadratic with the frequency. This effect can be reduced with suitable conductor constructions, e.g. segmented conductors.

Losses through proximity effect

The proximity effect detects the additional losses caused by magnet fields of parallel conductors through eddy currents and current displacement effects in the conductor and cable sheath. In practice, their influence is of less importance, because three-conductor cables are only installed up to medium cross-sections and single-conductor cables with large cross-sections with sufficient axis space. The resistance increase through proximity effects relating to the conductor resistance is therefore mainly below 10%.

Losses in the metal sheath

High voltage cables are equipped with metal sheaths or screens that must be earthed adequately.

Sheath losses occur through:

-Circulating currents in the system

-Eddy currents in the cable sheath (only applicable for tubular types)

-Resulting sheath currents caused by induced sheat voltage (in unbalanced earting systems)The sheath losses, especially high circulating currents, may substantially reduce the current load capacity under certain circumstances. They can be lowered significantly through special earthing methods.

2.5 Earthing methods, induced voltage

High voltage cables have a metallic sheath, along which a voltage is induced as a function of the operating current. In order to handle this induced voltage, both cable ends have to be bonded

Earthing methodBoth-end bondingSingle-end bondingCross-bonding

sufficiently to the earthing system. The following table gives an overview of the possible methods and their characteristics:

Standing voltage Sheath voltage at cable endslimiters required

NoYesOnly at cross-bonding points

NoYesYes

Typical application

Substations, short connections,

hardly applied for HV cables, Usually only for circuit lengths up to 1 km

Long distance connections

where joints are required

Overview of earthing methods and their characteristics

Both-end bonding

Both ends of the cable sheath are connected to the system earth. With this method no standing voltages occur at the cable ends, which makes it the most secure regarding safety aspects. On the other hand, circulating currents may flow in the sheath as the loop between the two earthing points is closed through the ground. These circulating currents are proportional to the conductor currents and therefore reduce the cable ampacity significantly making it the most disadvantegous method regarding economic aspects.

500kV XLPE电缆参数BRUGG公司的产品资料HIGH VOLTAGE XLPE CABLE SYSTEMS

Single-ended Bonding

One end of the cable sheath is connected to the system earth, so that at the other end (“open end”) the standing voltage appears, which is induced linearily along the cable length. In order to ensure the relevant safety requirements, the “open end” of the cable sheath has to be protected with a surge arrester. In order to avoid potential lifting in case of a failure, both earth points have to be connected additionally with an earth continuity wire. The surge arrester (sheath voltage limiter) is designed to deflect switching and atmospheric surges but must not trigger in case of a short-circuit.

Induced voltage distribution at single-end bonding

Cross-bonding

This earthing method shall be applied for longer route lengths where joints are required due to the limited cable delivery length. A cross-bonding system consists of three equal sectionswith cyclic

sheath crossing after each section. The termination points shall be solidly bonded to earth.

Induced voltage distributionat cross-bonding

Along each section, a standing voltage is induced. In ideal cross-bonding systems the three section lengths are equal, so that no residual voltage occurrs and thus no sheath current flows. The sheath losses can be kept very low with this method without impairing the safety as in the two-sided sheath earthing.

Very long route lengths can consist of several cross-bonding systems in a row. In this case, it is recommended to maintain solid bonding of the system ends in order to prevent travelling surges in case of a fault.

In addition to cross-linking the sheaths, the conductor phases can be transposed cyclicly. This solution is especially suited for very long cable engths or parallel circuits.

500kV XLPE电缆参数BRUGG公司的产品资料HIGH VOLTAGE XLPE CABLE SYSTEMS

Calculation of the induced voltage

The induced voltage Uiwithin a cable system depends on the mutual inductance between core and sheath, the conductor current and finally on the cable length:

and where LMis the mutual inductivity between core and sheath (H/km).

The mutual inductivity between core and sheath LMcalculates as follows:

For installation in trefoilformation:

Ui XM I L(V)

with

XM= Mutual inductance between core and sheath ( /km)

I = Conductor current per phase (A)L = Cable length

Two cases must be considered for the determination of the maximum occurring voltage and for the dimensioning of the surge arresters:I = INNormal operating current (A)

I = IcThree-pole Short-circuit current (A)The mutual inductance between core and sheath calculates from the following formula:

2a

LM 2 10 7 ln d

M

For installation in flatformation:

(H/km)

LM 2 10

7

2 2 a

(H/km) ln d M

XM LM( /km)

with

= Angular frequency (1/s)

with

a = Axial spacing (mm)

dM= Mean sheath diameter (mm)

2.6 Short-Circuit current capacity

For the cable system layout, the maximum short-circuit current capacity for both –the conductor and the metallic sheath –have to be calculated.Both values are depending on

-the duration of the short-circuit current

-the material of the current carrying component-the type of material of the adjacent

components and their admissible temperatueThe duration of a short circuit consists of the inherent delay of the circuit breaker and the relay time.

Short-Circuitcurrent capacity of conductorsThe following table contains the maximum admissible short-circuit currents Ik,1sfor conductors acc. to IEC60949 with a duration of 1second for the different conductor and insulation types.

Insulation materialConductor materialmm2250020001600140012001000800630500400300240

XLPECu

Al

OilCu

kA 1s; 90..250°C1s; 85..165°C358237260287190208229152166201133-172114125143951041157683906066724752573842432831342325

Admissible short-circuit currents

500kV XLPE电缆参数BRUGG公司的产品资料HIGH VOLTAGE XLPE CABLE SYSTEMS

Based on these reference values, the short-circuit currents for other durations can be converted with the following formula:

transfer from the current carrying componen to its adjacent components is allowed.

Short-Circuit current capacity of metallic sheathsIn addition to the above mentioned, the short-circuit current capacity of metallic sheaths depends on their layout. Theshort-circuit current capacity is different for tubular sheats and wire screens, but generally the total short-circuit current capacity of a metallic sheath is the sum of the capacity of its components.

Typical metallic sheath layouts with their constructional details are listed in a separate section.

Ik,x

1tc

Ik,1s

with

Ikx= Short-circuit current during x seconds [kA]tc = Duration of short-circuit [s]

Ik,1s= Short-circuit current during 1 second [kA]The above stated values were calculated on a non-adiabaticbasis, which means that heat

2.7 Dynamic forces

Single-core cables have to be fixed in their position at certain intervals. The calculation of dynamic forces for cable systems is important for the determination of the fixing interval and the layout of the fixing devices. It has to be distinguished between radial (e.g. clamps, spacers) and tangential (belts etc.) forces.The amplitude of a dynamic force in general is calculated applying the following formula:

Radial force

The dynamic force that a spacer has to absorb is:

Fr Fs

Fs= Dynamic force [kN/m]

= Layout factor (typical value for mid phase: 0.866)

Tangential force

The dynamic force that a fixing belt has to absorb is:

2 10 7 Is2

Fs (kN/m)

a

with

a = Phase axis distance (mm)

Ft Fs

Fs= Dynamic force [kN/m]

= Layout factor (value for trefoil: 0.5)

Is 2 Ic

wherein

ls= Impulse short-circuit current [kA] = surge factor (usually defined as 1.8)lc= Short-circuit current [kA]

2.8 Metallic sheath types

The metallic sheath of high voltage XLPE single core cables has to fulfill the following electrical requirements:-Conducting the earth fault current-Returning the capacitive charging current-Limitation of the radial electrostatic field-Shielding of the electromagnetic field

Since high voltage XLPE cables are very sensitive to moisture ingression, the metallic sheath also serves as radial moisture barrier. There are several modes of preventing water and moisture penetrating into the cable and travelling within it along its length. Solutions for closed metallic sheathes can be based on welding, extruding or gluing. Some typical sheath layouts as available from Brugg Cables are shown in the following table.

500kV XLPE电缆参数BRUGG公司的产品资料HIGH VOLTAGE XLPE CABLE SYSTEMS

Typical metallic sheath types

Brugg type XDRCU-ALT

Brugg type XDRCU-ALT

Aluminium laminated sheath with Copper wire screenFeatures:-Low weight-Low losses-Low cost

Typical application:

Installation in tunnels, trenches or ductsBrugg type XDRCU-CUT

Aluminium laminated sheath with Copper wire screen and

integrated fibres for temperature sensingFeatures:-Low weight-Low losses-Low cost

Typical applications:

Installation in tunnels, trenches or ductsBrugg type XDCUW-T

Copper laminated sheath with Copper wire screenFeatures:-Low weight-Low losses-Low cost

Copper corrugated sheath

Features:

-100% impervious to moisture-flexible

-resistant to deformation, pressure and corrosion-welded

Typical applications:

All installations in soil, especially in locations with shallow ground water level

Special application:

Installation in vertical shafts (up to 220m)

Typical applications:

Installation in tunnels, trenches or ducts

Brugg type XDPB-T

Brugg type XDRCU-PBT

Lead sheath

Features:

-100% impervious to moisture-seamless-extruded

Lead sheath

with Copper wire screen

Features:

-100% impervious to moisture-seamless-extruded

-increased short-circuit capacity throughadditional copper wire screenTypical applications:All installations in soil

Typical applications:All installations in soil

500kV XLPE电缆参数BRUGG公司的产品资料HIGH VOLTAGE XLPE CABLE SYSTEMS

3. XLPE Cable System Standards

Brugg Cables´ XLPE cable systems are designed to meet requirements set in national and international standards. Some of these are listed below.IEC

XLPE cable systems specified according to IEC (International Electrotechnical Commission) are among many other standards accepted.

Some frequently used standards are:IEC 60183Guide to the selection of high-voltage cables.IEC 60228Conductors of insulated cables.IEC 60229Tests on cable oversheaths which have a special protective function and are applied by

extrusion.

IEC 60287Electric cables –Calculation of the current rating.IEC 60332Tests on electric cables under fire conditions.IEC 60811Common test methods for insulating and sheathing materials of electric cables.IEC 60840Power cables with extruded insulation and their accessories for rated voltage above

30 kV (Um=36kV) up to 150 kV (Um=170 kV). Test methods and requirements.

IEC 60853Calculation of the cyclic and emergency current rating of cables.IEC 61443Short-circuit temperature limits of electric cables with rated voltages above

30 kV (Um=36 kV)

IEC 62067Power cables with extruded insulation and their accessories for rated voltage above

150 kV (Um=170 kV) up to 500 kV (Um=550 kV) -Test methods and requirementsCENELEC

In Europe, cable standards are issued by CENELEC. (European Committee for Electrotechnical Standardisation.) Special features in design may occur depending on national conditions.HD 632

Power cables with extruded insulation and their accessories for rated voltage above 36 kV (Um=42 kV) up to 150 kV (Um=170 kV). Part 1-General test requirements.

Part 1 is based on IEC 60840 and follows that standard closely.

HD 632 is completed with a number of parts and subsections for different cables intended to be used under special conditions which can vary nationally in Europe.

ICEA / ANSI / AEIC

For North America cables are often specified according to-AEIC (Association of Edison Illuminating Companies)-ICEA (Insulated Cable Engineers Association)-ANSI (American National Standards Institute) or

The most frequently standards referred to are:AEIC CS7-93Specifications for crosslinked polyethylene insulated shielded power cables rated

69 through 138kV.

ANSI / ICEA S-108-720-2004Standard for extruded insulation power cables rated above 46 through

345kVISO Standards

Our systems comply with the requirements of ISO 9001 and ISO 14001 and are certified by Bureau Veritas Quality International.

500kV XLPE电缆参数BRUGG公司的产品资料HIGH VOLTAGE XLPE CABLE SYSTEMS

4. Technical data sheets

500 / 290kV XLPE Cable -Technical data and Ampacity400 / 230kV XLPE Cable -Technical data and Ampacity345 / 200kV XLPE Cable -Technical data and Ampacity220 / 127kV XLPE Cable -Technical data and Ampacity132 / 76kV XLPE Cable -Technical data and

Ampacity

500kV XLPE电缆参数BRUGG公司的产品资料HIGH VOLTAGE XLPE CABLE SYSTEMS

with Aluminium laminated sheath

Cable layout

Production process

The inner semiconductive layer, the Copperconductor, stranded, cross-sections of

XLPE main insulation and the outer 1000sqmm and above segmented, optionally

semiconductive layer are extruded in a with longitudinal water barrier

single operation.Inner semiconductive layer, firmly bonded to the

Special features of metallic sheathXLPE insulation

Copperwire screen as short-circuit XLPE main insulation, cross-linked

current carrying component

Outer semiconductive layer, firmly bonded to

Aluminiumfoil, overlapped, the XLPE insulation

0,25mm thick, as radial diffusion

Copperwire screen with semi-conductive barrierswelling tapes as longitudinal water barrier Low weight, low cost,

internationally proven designAluminiumlamninated sheath

HDPE oversheath, halogen-free, as mechanical Applicable standardsprotection, optionally: with semi-conductive IEC 62067 (2001)and/or flame-retardant layer

XDRCU-ALT500/290

kV

Technical data

cross-section mm

2

Outer diameter approx.mm122123127128129135143144

Cable weight appox.

kg/m1820232426293440

Capacitance

Impedance(90°C, 50 Hz)

/km0.220.200.190.190.180.180.170.17

Surge impedance

5449474442424037

Min. bending

radius

mm24502500255026002600270029002900

Max. pulling

force

kN384860728496120150

kcmil12501600200024002750320040005000

µF/km0.120.140.160.170.190.190.190.23

630800100012001400160020002500

Ampacity

Buried in soil

Buried in soil

Buried in soil

0.7A10261170137714971622171819012120

Buried in soil

1.0A882998116612611361144015851751

In free air

In free air

-A11521341160817721944206823262670

Load Factormm

0.7A9541076126813691473156117111873

1.0A806901105511341215128614031522

-A10531211145215881728183520452301

kcmil12501600200024002750320040005000

630800100012001400160020002500

Calculation basis:

Conductor temperature 90°C, 50Hz, soil temperature 25°C, laying depth 1200mm, soil thermal resistivity 1.0 Km/W, phase distance at flat formation 30cm, air temperature 35° -Earthing method: Single-end bonding or Cross-bonding

500kV XLPE电缆参数BRUGG公司的产品资料HIGH VOLTAGE XLPE CABLE SYSTEMS

with Aluminium laminated sheath

Cable layout

Production process

The inner semiconductive layer, the Copperconductor, stranded, cross-sections of

XLPE main insulation and the outer 1000sqmm and above segmented, optionally

semiconductive layer are extruded in a with longitudinal water barrier

single operation.Inner semiconductive layer, firmly bonded to the

Special features of metallic sheathXLPE insulation

Copperwire screen as short-circuit XLPE main insulation, cross-linked

current carrying component

Outer semiconductive layer, firmly bonded to

Aluminiumfoil, overlapped, the XLPE insulation

0,25mm thick, as radial diffusion

Copperwire screen with semi-conductive barrierswelling tapes as longitudinal water barrier Low weight, low cost,

internationally proven designAluminiumlamninated sheath

HDPE oversheath, halogen-free, as mechanical Applicable standardsprotection, optionally: with semi-conductive IEC 62067 (2001)and/or flame-retardant layer

XDRCU-ALT400/230

kV

Technical data

cross-section mm

2

Outer diameter approx.mm113114115118122123128135136

Cable weight appox.

kg/m161718212425283338

Capacitance

Impedance(90°C, 50 Hz)

/km0.230.220.200.190.190.180.180.170.17

Surge impedance

565348454341403935

Min. bending

radius

mm230023002300240024502450260027002700

Max. pulling

force

kN30384860728496120150

kcmil100012501600200024002750320040005000

µF/km0.120.130.150.170.190.200.200.210.26

500630800100012001400160020002500

Ampacity

Buried in soil

Buried in soil

Buried in soil

0.7A91210491199141615341665176719562190

Buried in soil

1.0A7889001020119512901394147716281804

In free air

In free air

-A100611731367164718041980211223762739

Load Factormm

0.7A8539721098129814021509160017601931

1.0A723819917107611581241131514401565

-A92410681228147816121755186920782347

kcmil100012501600200024002750320040005000

500630800100012001400160020002500

Conductor temperature 90°C, 50Hz, soil temperature 25°C, laying depth 1200mm, soil thermal resistivity 1.0 Km/W, phase distance at flat formation 30cm, air temperature 35° -Earthing method: Single-end bonding or Cross-bondingValues apply for cables with rated voltages from 380kV to 400kV acc. to IEC 62067