The SIP-3 cable is a single-core, self-supporting insulated wire designed for medium-voltage overhead power transmission lines. Its conductors are made from a compact aluminum alloy, and the insulation is a light-stabilized XLPE that is resistant to UV radiation and ozone. The key difference between SIP-3 and other SIP cables is its high-voltage rating, suitable for 20kV and 35kV networks.
Key Specifications & Construction
- Voltage: 20kV and 35kV.
- Conductor: Bare alloy aluminum conductor (AlMgSi), round stranded compressed (RM). The conductor is longitudinally watertight due to a dry filling.
- Insulation: Black, UV-resistant XLPE. The SIPn-3 variant uses XLPE that does not spread combustion.
- Core Count: Single Core.
- Standards: The cable adheres to a self-supporting design for medium-voltage lines.
- Service Life: Minimum 25 years.
Deciphering the Name
- S – self-supporting
- I – insulated
- P – wire
- 3 – design type for protective insulation
- n – does not support combustion (for SIPn-3)
- AAsXS – (A)luminum conductor, (s)elf-supporting, (XS) XLPE insulation.
Technical Data
- Long-term Conductor Heating: C
- Overload (up to 8 hrs/day): C
- Short Circuit (up to 5s): C
- Operating Temperature: C to C
- Minimum Laying Temperature: C
- Minimum Bending Radius: 10 times the wire diameter
Parameters for 20kV SIP-3 Cable