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TYPE 245

UNDERGROUND MINE CABLES

Type 245 cables are designed for heavier duty underground applications where increased mechanical robustness is required without sacrificing operational flexibility. This construction provides enhanced resistance to abrasion and impact compared to Type 241, while retaining the semiconductive elastomer screen for superior flexibility over metal-screened alternatives. Common failure modes in poorly selected Type 245 cables include excessive stiffness leading to handling damage, and insulation stress where flexibility is traded off incorrectly against mechanical protection.

ZNERGY ENGINEERING RESPONSE:

Znergy designs Type 245 cables with carefully balanced mechanical reinforcement and insulation systems to maintain flex performance while delivering higher resistance to abrasion and impact. The three-pilot configuration supports extended control and monitoring functions in longwall and complex underground circuits.

USE WHEN: Heavier mobile equipment, repeated handling, intermittent reeling, elevated floor abrasion.

DO NOT USE WHEN: Continuous tight-radius reeling dominates and flexibility is paramount —use Type 241.

APPROVALS / STANDARDS

AS/NZS 1802

VOLTAGE OPTIONS AVAILABLE

245.1 – 1.1/1.1 kV

245.3 – 3.3/3.3 kV

BEHAVIOUR IN FLAME & FIRE

Fire retardant — self-extinguishing per AS/NZS 1802.

FLEXIBILITY

Flexible — designed for heavier mobile equipment and intermittent reeling. Open weave reinforcement under the HD-85-PCP sheath provides mechanical protection without restricting bending performance.

RESISTANCE TO

Chemical exposure
Very good / Frequent
Mechanical impact
Heavy
Water exposure
Immersion / Temporary coverage
Solar radiation & Weather
Suitable for direct exposure
Ozone & ageing
Excellent — EPR/PCP resists cracking

ELECTRICAL PERFORMANCE

Property
Specification
Voltage Range
1.1/1.1 kV to 3.3/3.3 kV
Insulation system
EPR (R-EP-90) — Ethylene Propylene Rubber
Conductor material
Class 5 flexible tinned annealed copper
Screen type
Semiconductive elastomer — more flexible than metal screen
Voltage test (11 kV)
10 kV AC for 5 minutes

MECHANICAL PROPERTIES

Property
Specification
Flexibility
Flexible — heavier mobile equipment & intermittent reeling
Jacket material
HD-85-PCP (Polychloroprene) with open weave reinforcement
Mechanical impact
Heavy — enhanced abrasion and impact resistance
Min. bending radius
This is a simple text block.6× OD static | 8× OD dynamic / reeling
Screen stability
Semiconductive elastomer — resists migration under torsion

CABLE DESIGN

Semiconductive screened power cores, with three earth cores and three extensible pilots.

Core: Metal: tinned copper, three core three earths plus three central pilots.

Conductor separator tape: 1.1/1.1 kV – polyester where necessary. 3.3 kV and above – semiconductive screen.

Insulation: EPR (R-EP-90) core with durably printed core numbers at intervals less than 300 mm, on black semiconductive insulation screen for phase identification.

Screen: Semiconductive elastomer screen.

Pilot: Three pilots, in the centre of the cable. Maximum DC resistance: 3 Ω/100m for all cables.

Earth: Three semiconductive elastomer covered flexible earths, located in the interstices.

Sheath: Open weave reinforcement, under heavy duty HD-85-PCP.

TYPICAL APPLICATIONS

  • Heavier underground trailing duties requiring mechanical robustness
  • Continuous miners and road headers with intermittent repositioning
  • Longwall equipment requiring multi-pilot control circuits Monorails, shuttle cars and heavy mobile plant Applications needing more protection than Type 241, without armour
  • Feeder and trailing duties with elevated abrasion and impact exposure

OPERATING TEMPERATURE RANGE

Property
Specification
Maximum Operating Temperature
+90°C
Minimum Operating Temperature
-25°C
Short-Circuit Temperature
Up to +250°C
Emergency Rating
+130°C