IS 9968 Pt.2-1981

标准号：IS 9968 Pt.2-1981
发布日期：1982/8/1 12:00:00
实施日期：1999/12/31 12:00:00
适用范围： This standard (Part II) specifies the requirements for heat resisting elastomer insulated cables for fixed installations and flexible cables, suitablefor the following voltage grades ( Uo/U):a) Earthed System—1·9/3·3, 3·8/6·6 and 6·35/11 kV; andb) Unearthed System — 3·3/3·3, 6·6/66 and 11/11 kV.1.2 Cables for fixed installations cover single and three-core constructions with copper or aluminium conductors, heat resisting elastomer insulated (with conductor and insulation screens as required), unarmoured or wire/strip armoured, with overall sheath of PVC or HD HOFR elastomeric compound.1.3 Flexible cables cover single and three-core constructions with or without grounding conductors, copper conductors, heat resisting elastomer insulated (with conductor and insulation screens as required ), unarmoured or armoured, with overall sheath of HD HOFR elastomeric compound.1.4 The cables covered in this standard are suitable for use where the combination of ambient temperature and temperature-rise due to load results in conductor temperatures not exceeding the following for normal sustained operation and for short-circuit conditions:Butyl Rubber Ethylene Propylene Rubber Insulated Cables Insulated CablesMaximum conductor temperature 85 °C 90°Cfor continuous operationMaximum conductor temperature 220°C 250°Cduring short circuit