Frequently Asked Questions from TANO CABLE

There are two twisting methods for the conductive cores of power cables: twist-free twisting and twist twisting. The core twisted by the back-twisting method has no internal torsion stress, so it is mostly used for twisted wires that are not tightly compressed to avoid dispersing when the single wire is broken due to internal stress. Twisting without back-twisting is mostly used for compacted cores, because the residual stress generated by self-twisting is elastic deformation, and the compaction is plastic deformation, so the internal stress can disappear after compacting.

Copper core cables with different cross-sections can be connected by open-back weak copper pipes and connected by soldering, or pure copper rods can be connected into copper pipes according to different cross-sectional requirements and connected by crimping.

At five evenly distributed points on the circumference of the sheath, measure the outer diameter of the sheath and its average value. The average outer diameter is the outer diameter of the sheath.

(1) When the cable needs to be laid through a protective pipe, the inner diameter of the pipe should not be less than 1.5 times the outer diameter of the cable, and the inner diameter of the concrete pipe, clay pipe, asbestos, and cement pipe should not be less than 100mm; (2) The bending radius of the cable tube should meet the requirements of the bending radius of the cable inserted; (3) Each pipe should not exceed three elbows at most, and there should be no more than two right-angle bends.

Steel Tape Armor(STA) is only used for laying of directly buried cables or ordinary pipes, ordinary ground, tunnels, etc. The Steel Wire Armor(SWA) can withstand general longitudinal tension, so it is suitable for short-distance overhead laying or vertical laying.

(1) High breakdown strength; (2) Low dielectric loss; (3) Very high insulation resistance; (4) Excellent discharge resistance; (5) It has certain flexibility and mechanical strength; (6) Long-term insulation performance is stable.