Zhengzhou Yifang Cable Co., Ltd
Zhengzhou Yifang Cable Co., Ltd Over 10 years International trade experience, Professional R& D department Strict quality control system.
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Application
Medium voltage aerial power distribution. Transformer feeders, power plants, industrial and operation installations, in places where underground networks cannot be possible, mining installations, tree-lined urban zones or with little space.
Construction
1. Conductor: Compact stranded aluminium, class 2.
2. Inner semi-conductor: Extruded.
3. Insulation: Cross linked polyethylene XLPE-TR (Tree retardant).
4. External semi-conductor: Extruded strippable.
These last three components extruded CV (continuous vulcanization) triple extrusion.
5. Screen: Aluminium tapes.
6. Outer sheath: Polyethylene PE.
7. Messenger: Galvanized stranded steel wire.
8. Sheath: Polyethylene PE.
Main characteristics
Conductor temperature of 90ºC for normal operation, 130°C for emergency overload and 250°C for short circuit conditions. Good resistance to traction. Excellent properties against heat aging. Resistance to abrasion, sunlight, weather, ozone, acids, alkalis and other chemical substances at normal temperatures. Flame retardant.
Gauge:
From 35 mm2 up to 185 mm2.
Marking:
INDECO S.A. NA2XSA2Y-S 8.7/15 kV - Nb. Coresx1xSection - Year.
Packing:
Non returnable wooden reels.
Colour:
Insulation: Natural (Core identification with binder tapes: green(R), white(S), red(T).
Outer sheath: Black.
National standards
NTP-IEC 60228: Conductors of insulated cables.
NTP-IEC 60502-2: Power cables with extruded insulation and their accessories for rated voltages from 6 kV up to 30 kV.
ASTM A 475: Zinc coated steel wire strand.
International standards
IEC 60228: Conductors of insulated cables.
IEC 60332-1: Test for vertical flame propagation for a single insulated wire or cable.
IEC 60502-2: Power cables with extruded insulation and their accessories for rated voltages from 6 kV up to 30 kV.
IEC 60811-1-1: Measurement of thickness and overall dimensions - Test for determining the mechanical properties.
IEC 60811-1-2: Thermal ageing methods.
IEC 60811-1-3: Water absorption tests - Shrinkage test.
IEC 60811-2-1: Ozone resistance, hot set and mineral oil immersion tests.
IEC 60811-3-1: Pressure test at high temperature - Tests for resistance to cracking.
IEC 60811-4-1: Resistance to environmental stress cracking - Measurement of the melt flow index - Carbon black and/or mineral filler content measurement in polyethylene by direct combustion.
