Application
- Instrument circuit upto 250V, instrument safe systems.
- Fixed installation for instrument, communication, control and alarm system in both explosion risk and safe areas, general purposes.
- Maximum operating conductor temperature 90 °C
Construction Details
1) Conductor : Circular tinned stranded copper wires as per IEC 60228 Class 2
2) Insulation : Halogen-free Ethylene propylene rubber (HF-EPR) as per IEC 60092-351
3) Pair / triple twisting : Two / three insulated cores twisted together with suitable lay length
4) Core assembly : Pairs / triples are laid up with non-hygroscopic fillers and the binder tape may be applicable
5) Collective screening : Wrapped by copper or aluminium backed polyester tape with tinned copper drain wire
6) Bedding : Halogen-free compound (inner covering)
7) Armour : Copper wire braid as per IEC 60092-353
8) Outer Sheath
- Halogen-free thermoset compound as per IEC 60092-359, SHF2
RFCU = with galvanized steel wire braid
- Code-S2 : Halogen-free thermosetting compound as per IEC 60092-359, SHF2
- Code-S2/S6 : Halogen-free & Mud resistance thermosetting compound as per IEC 60092-359, SHF Mud
Standards Applied
· Design guideline : IEC 60092-3/ 353 / 375
· Material properties : IEC 60092-351 (Insulation, HF-EPR)
IEC 60092-359 (Sheath, SHF2)
- Flame retardant : IEC 60332-3-22, Cate. ‘A’
- Halogen free properties : IEC 60754-1
- Low Smoke properties : IEC 61034-1/2
- Cold properties : CSA C22.2 No. 03
- Sunlight resistance : UL 1581
- Mud resistance : NEK 606 (2004)