quad-cables

APPLICATION:

Star-quad cable is a special conductor cable that has special qudrapole geometry that has magnetic immunity when used in a balanced line. Four conductors are used to carry the two legs of the balanced line. All four conductors must be an equal distance from a common point usually the center of the cable. The four conductors are arranged in a four-point star forming a square. Opposite points of the star are connected at each end of the cable to form each leg of the balanced circuit. Star quad cables often use filler elements to hold the conductor centers in a symmetric four-point arrangement about the cable axis.


PROPERTIES:

  • Quad Cables are often used with microphone signals in professional audio and hence find its use in test speakers in railway stations.
  • Quad Cables are also used in axle counter & signalling
  • 4 Quad & 6 Quad Cables with 0.9 mm condcutor size.(RDSO Specification)

Standard:IRS TC 30

CONSTRUCTION:

Conductor

Annealed high condcutivity copper

Insulation

Polyethylene Insulation

Quadding

Four Insulated conductors stranded to form a star quad

Laying Up

The quads are assembled to form a symmetrical core. PE strings are used.

Filler & Core Wrapping

The cable core is fully filled with water resistant compound and wrapped with PE

Moisture Barrier

Longitudinally applied Poly-Al tape

Inner sheath

Black PE compound

Screening & Protection

The cable core with inner sheaths is surrounded by Aluminum Strips/wire which are in turn wrapped with a woven tape impregnated with Barium Chromate.

Intermediate Sheath

Further protection of screening is provided by extruded PVC

Armouring

Armouring with two application of steel tape each applied helically with a specified gap

Outer Sheath

PVC Compound



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