Reeling and Trailing Cables to AS/NZS
Olex specialises in a range of mining cables designed to meet international standards and specific needs of the Australian and worldwide mining industry. The quality and toughness of these products make them much sought after on world markets.
A key to this achievement is our understanding of materials technology, particularly in rubber compounds. This skill, coupled with many years of field experience and applications know how, results in cables which perform above expectations over long service times.
Characteristics and merits:
Standard conductor construction: Mid-range flexible and ‘robust’ conductor with resistance to flattening and crushing.
Super flex; definitely flexible and ‘soft’ with minimum resistance to bending, plus smaller bending radii. Conductor has many more wires each of smaller size. R-EP-90 Insulation; Standard Olex EPR tough but flexible insulation with resistance to damage and good electrical characteristics. HV-EP-90 Insulation; High electrical grade EPR capable of higher electrical stresses.
Semiconductive; Low resistance Earth path around each core with proven electrical performance, but flexible and tolerates flexing and bending. Metal braided screens; High conductivity short circuit safety, the braids form an earth path with very low electrical resistance and high reliability.
Interstitial earths; mechanically strong earths replace braided earth screens in cable that is reeled or frequently moved.
Semiconductive; Low resistance path from one earth core to the next so provides higher conductivity earth circuit.
Interstitial pilots; Insulated pilots are used for control circuits. Replaces central pilot and allows the cable diameter to be smaller where the cradle is absent.
Cradle; Protects cores against crushing. Semiconductive to prevent phase-tophase faults without earthing. Usually incorporates the central pilot. Central pilot; Extensible pilot, used for monitoring circuit to trip breakers before cable is mechanically pulled apart. Type 245 cable has three central pilots. Low layup lay ratio; Twist of cores allows cable bending and lower lay ratio (more twists) allows smaller bending radius.
Semiconductive extrusion; Provides semiconductive path to earth conductors at any cut of the sheath or split of insulation through to active conductors. Pliable armour; Impact tolerant and cut resistant armour provides mechanical strength to avoid damage from impact and cutting. Sheath reinforcement; High strength yarns or tapes provide radial mechanical strength to sheath and cable to prevent squashing or crushing of the cable.