4. Guaranteed Technical Particulars

(220 KV XLPE CABLE)

1. General  

1.1    Manufacturer:   Chongqing Electric Wire  & Cable Co., Ltd.

1.2. Place of manufacture:   239 Jinguo Ave., Yubei National Agricultural Technology Park, Chongqing P.R.China

1.3 Type/designation: YJLW02-127/220kv-1*800 (Cu/XLPE/Corrugated Al. sheathed/PVC)

1.4 Applicable standards (Please list all applicable standards)

a)        IEC 62067(2001) Power cable with extruded insulation and their accessories for related as amended/revised till date, as applicable.

b)        IEC 60228(1978) Conductor for insulated cables.

c)        IEC 60229(1982) Tests on cable over sheaths.

d)        IEC 60230(1966) Impulse tests on cables and their accessories.

2. Main data (applicable to cable and accessories)

2.1     Rated system voltage kV:   127/220

2.2     Highest voltage for   equipment Um   kV :  245

2.3     Rated frequency

o   Normal condition Hz:   50

o   Exceptional condition Hz:   49~61

2.4     Rated power frequency  withstand voltage   kVrms:   460KV/1min

2.5     Rated lightening impulse  KV peak:   

o  Rated switching impulse withstand voltage   kV peak: 1050KV

2.6     15 minute dry power frequency withstand test voltage  KVrms  254KV/15min

2.7     Maximum partial discharge PC attest voltage kVrms: No discharge tested

2.8     Test voltage after laying, applied on complete installation (cable and cable end seals)  kV:  216 KV (1.7 U₀)  AC voltage , 1 hour ; or 127 KV (U₀) AC voltage , 24 hours

2.9     Maximum permissible operating temperatures at:-

o  Continuous rated operation ^Celsius Degree:   90

o  Short time emergency (overload) operation ^Celsius Degree  105

o  Short-circuit condition   ^Celsius Degree  250

3.0   Cable construction

o  Conductor cross section mm² :800

o  Conductor design : 5 segments

o  Conductor material : Annealed copper

o  Type of screen : consists of metal screen layer and non-metal screen layer

o  Screen cross-section mm²: 927(metal screen )

o  Screen material : Electric  aluminum ( metallic ) , super clean and super smooth semi-conducting XLPE ( compound )

o  Material for metallic screen : Electric aluminum

o  Thickness of XLPE insulation mm : 25.0

o  Thickness of outer PE sheath mm : 5.0

o  Outer diameter of cable mm : 116.4

o  Minimum bending radius mm :2660( during installation );1995( installation  ready  )

o  Weight of cable kg/rn :17.03kg/m

4.0   Electrical ratings of cable

a)       Rated continuous current considering specified cable laying  Amps:  1025 A ( direct buried trefoil formation laying  at a depth 1.5 meters , soil temperature at 30 Celsius Degree , thermal resistivity  1.2 Cm/w )

b)       Short time withstand current  

o   Of conductor KArms :114.5KA/1s

o   Of screen kArms :66KA/1s

o   Earth fault current kArms : 86.34KA/1s

o   Dynamic short circuit  withstand current  kApeak : 86.34KA/1s

c)       Screen/sheath losses per phase :1.76w/m

d)       DC resistance at 20 Celsius Degree:

e)       Of conductor Ohm/km :0.0221

f)         Of screen Ohm/km :0.0443

g)       AC resistance of conductor at 90 Celsius Degree Ohm/km :0.0311

h)       Capacitance per phase 0.144 μF/km

i)         Surge impedance nF/km :57.2Omega

j)         Total cable losses at rated current, considering proposed screen earthing

o   Per phase:25.41kw/km

o   Dielectric losses per phase kW/km :0.4 kw/km

5.0      Tower sealing end termination  Outdoor termination

5.1      Manufacturer : out door termination supplied by cable accessories manufacturer 

5.2      Type designation :

5.3      Place of manufacturer :

INFORMATIVE DATA

1.                   Cable length from one end to the other tower gantry :

1.1               Maximum electric field strength at the conductor at 220 Kv (highest system                 voltage)  kV/mm :7.23

1.2               Charging current per phase at 220 kV A/km :6.32

1.3               Inductance between conductors/per phase mH/km :0.5941

1.4               Inductance between conductor and screen : 0.05mH/km

1.5               Screen inductance :0.5441mH/km

1.6               Induced voltage on screen :0.0001 V/A.m

1.7               Electric stress at conductor screen :7.23KV/mm

1.8               Electric stress at insulation screen :3.23KV/mm

1.9               Circulating screen/sheath/armour/current : 0

1.10            Positive Sequence impedance per phase:  0.1881Omega/km

1.11            Negative Sequence impedance per phase:  0.1881Omega/km

1.12            Zero sequence impedance per phase: 0.5969Omega/km

1.13            Proposed cable laying

o  laying in : Underground

o  maximum ambient temperature °C :50

o  arrangement of single phase cables : Trefoil formation or Flat formation

1.14            Total estimated length of single phase cable Metres: 500m

1.15            Bending Radius for pulling :2660mm

1.16            Bending Radius below terminal :2660mm

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