Type OnGcekżi-G 0.6/1 kV Mining & Trailing Cable

Multi-core from 3 to 12 cores Mining cables with rubber insulation and sheath with individually screened cores for rated voltage 0.6/1 kV

Type OnGcekżi‑G 0.6/1 kV Mining & Trailing Cable:

General Description

• Purpose:
  A multi‑core cable designed specifically for underground mining applications. It is used for powering mining equipment and is suitable for hazardous environments (areas with methane or coal‐dust explosion risks).

• Voltage Rating:
  Rated for 0.6/1 kV.

• Construction Standard:
  Complies with Polish standard ZN‑95/MP‑13‑K1176.

Cable Construction

1. Conductors:

   • Made of multi‑stranded, tinned copper wires (class 5c per PN‑88/E‑90160).

   • The cable may have between 3 and 12 cores.

   • Typical Configuration:

     • For example, a 3‑core cable has 2 “working” conductors and 1 “protective” conductor.

     • Higher‑core cables include additional “auxiliary” conductors (e.g., a 7‑core cable might be arranged as 3 working + 1 protective + 3 auxiliary).

2. Insulation:

   • Each conductor is insulated with heat‑resistant rubber (IEP), meeting the PN‑89/E‑29100 standard.

3. Screening:

   • All working (and auxiliary) conductors are individually screened.

   • The screen is a braid made from tinned copper wires combined with plastic yarn, ensuring a minimum coverage of 65%.

4. Core Assembly (Ośrodek):

   • The screened working and auxiliary conductors are twisted together on top of a non‑insulated protective conductor.

   • (In some 3‑core and 10‑core versions, they are twisted together with two elements of the protective conductor.)

   • The cross‑section of the protective conductor includes the area taken by the screening layers.

5. Outer Jacket (Opona):

   • Made of flame‑retardant rubber (type ON‑4) per PN‑89/E‑29100.

   • The jacket is black in color.

Cable Designation Explained

The code OnGcekżi‑G breaks down as follows:

• On: Indicates the outer jacket is made from flame‑retardant rubber.

• Gc: Specifies that the insulation is made of heat‑resistant rubber.

• ekżi: Means that each copper conductor is individually screened (using tinned copper wire).

• ‑G: Signifies that the cable is intended for mining applications.

Example:

A cable labeled “OnGcekżi‑G 3×2.5 + 2.5 + 3×2.5 mm²” means it is a 7‑core cable having:

• 3 working conductors (each 2.5 mm²),

• 1 protective conductor (2.5 mm²),

• 3 auxiliary conductors (each 2.5 mm²).

Operating Characteristics

• Maximum Operating Temperature:
  +90°C

• Ambient Temperature Range:
  –25°C to +50°C

• Test Voltages:

  • Working Conductors: Tested at 3.2 kV

  • Auxiliary Conductors: Tested at 2 kV

• Packaging:

  
  Supplied on drums.

• Additional Option:

  
  With customer agreement, the cable can be manufactured without screening on the auxiliary conductors.

Applications

• Where Used:

  
  Ideal for underground mining environments such as:

  • Methane and non‑metallic mines,

  • Areas classified by explosion hazard (methane hazard grades “a”, “b”, or “c” and coal dust explosion classes “A” or “B”).

Electrical & Physical Parameters

• Electrical Properties:
  Detailed tables (provided in the full specification) list parameters such as:

  • Conductor Resistance: (e.g., a 1.5 mm² conductor has about 13.7 Ω/km)

  • Current‑Carrying Capacity: (e.g., approximately 28 A for a 1.5 mm² conductor)

  • Unit Inductance, Reactance, and Capacitance: Values vary with conductor size.

• Dimensional Data:

  
  Tables also specify:

  • Insulation Thickness,

  • Jacket Thickness,

  • Maximum Overall Cable Diameter

  • Approximate Weight per Kilometer for various conductor sizes and core configurations.