Cable Repair Tape & Heat Shrink Sleeve From 3M Electrical For VFD Cables

Published 13 Feb 2019

• uploaded by Chris Dodds - Thorne & Derrick Sales & Marketing Manager

Heat Shrink Sleeve For VFD Cables

Thorne & Derrick International, based in the UK, are Specialist Distributors of cable repair products used to re-instate damaged cable sheaths and jackets where the extent of damage to the cable does not necessitate the need to carry out a cable joint to the section of compromised cable.

What Are VFD Cables?

Basically, VFD cables distribute electrical power from AC drive systems to AC motors.

Variable-frequency AC motor drive output cables are subject to harsh operating settings characterised by high voltage spikes, high noise levels and adverse environmental conditions during normal service conditions.

Consequently, VFD cables must conduct not only the overall high power levels of the pulse-width modulated (PWM) signals but also the extremely high voltage which can occur when standing waves develop on the conductors. This high voltage can cause corona discharges to occur between the conductors of conventional cables, causing damage not only to the cabling itself, but also to the motors, bearings, drives and related equipment.

This damage can cause failure of the entire drive system, resulting in costly production downtime. Here, we present a simple but effective method of repairing cable sheath damage to VFD cables using cable repair tapes manufactured by 3M Electrical.

Why High Performance VFD Cable Is Important

Image : Belden

TEOF F-RFOU Offshore Cables

Armoured VFD Cables

Pictured below is a Prysmian (P) TEOF F-RFOU P1/P8 VFD 1.8/3kV 3X150+3G35mm2 IEC 60332-3-22 2013 cable – the cable outer sheath has been clearly damaged.

CABLE REPAIR TAPEs

A recommended cable repair solution is to remove the outer VFD cable jacket 200mm each side of the damage so a confident and accurate assessment of the extent of cable damage can be ascertained.

Assuming cable damage is limited to the sheath and not caused impact into the cable wire armour or braid then a simple cable repair can be made using 3M Scotch 24 copper mesh shielding tape, 3M Scotch 2228 rubber mastic sealing tape and then cable sheath re-instatement using 3M HDCW heat shrink wrap-around cable repair sleeve.

Scotch 24 Tape

• Manufacturer: 3M Electrical
• Brand: Scotch Tapes
• Stock Code: 3M Scotch 24 Tape
• Product Category: Electrical Tapes
• 3M Scotch 24 Tape Application: All metal open weave shielding braid, conformable, temperature stable. Continue electrostatic shielding across splice.
• 3M Scotch 24 Roll Sizes:
• 1″ x 15′ (25 mm x 4,5 m)
  1″ x 100′ (25 mm x 30,5 m)
  2″ x 10′ (51 mm x 3,05 m)

Scotch 2228 Tape

• Manufacturer: 3M Electrical
• Brand: Scotch Tapes
• Stock Code: 3M Scotch 2228 Tape
• Product Category: Electrical Tapes
• Sub Product Category: Insulation Tapes
• 3M Scotch 2228 Tape Application: Highly conformable, super stretchy in all weather applications; resists UV rays, abrasion, corrosion, alkalies and acids. Primary insulation for splices up to 600V. Protective jacketing.
• Max Temperature: 90°C / 194°F emergency overload of 130°C / 266°F
• 3M Scotch 2228 Roll Sizes:
• 2″ x 3′ (50 mm x 0,9 m)
  1″ x 10′ (25 mm x 3,0 m)
  2″ x 10′ (51 mm x 3,05 m)

LV Cable Joints (Low Voltage Cables)

Thorne & Derrick stock and distribute LV Joints in Cold Shrink, Heat Shrink or Resin Cast technologies – multicore and multi-pair cable joints are available for immediate backfill and energisation of Low Voltage power, control and instrumentation cables 600V/1000V 3.3kV.

Complete range of LV Cable Accessories  ➡

Cable Breakouts | Cable Caps | Cable Lugs | Cable Cleats | Cable Trough | Cable Duct | Feeder Pillars | for 11kV/33kV/66kV networks see MV HV Joints & Terminations

Pfisterer | Nexans Euromold | Prysmian | Cable Joints & Terminations MV HV

Cold Shrink by 3M | Joints | Abandonment | Terminations | Low Voltage LV Cables

Further Reading

• 3M Scotch 24 Tape – Electrical Shielding Earthing Tape Size: 141.36 KB
• 3M Scotch 2228 Rubber Mastic Tape Size: 57.02 KB