3M 11KV 3C*240SQMM INDOOR TERMINATION KIT

3M 11 kV, 3-core 240 sq mm indoor termination kit would typically consist of, and key design considerations. (Note: I was not able to locate a definitive 3M datasheet specifically for the 240 sq mm indoor version in this search you must confirm the exact variant from 3M or your supplier.)

Purpose & Application

• To terminate a 3-core medium voltage polymeric cable (e.g. XLPE or EPR) of size 240 sq mm in an indoor environment (such as inside switchgear rooms, cable galleries, indoor cable enclosures).

• The termination must provide:
  Electrical insulation across the transition from the cable to the terminal or busbar
  Stress / electric field grading (especially near shield cutbacks)
  Shield / screen continuity (bonding the cable metallic shield to earth)
  Sealing against moisture, air ingress, and voids
  Mechanical support and interface to termination hardware (like lugs, connectors)
  Reliable long-term performance under indoor environmental conditions

Because it is an indoor / cold-shrink type kit, it is designed such that no heat source or flame is required during installation the silicone / elastomer body is pre-stretched and then contracts when the internal support core is removed, tightly conforming to the cable insulation surface.

Typical Kit Components / Parts

A termination kit of this size would generally include:

• Silicone rubber / elastomeric termination body (pre-stretched / cold-shrink type) with built-in stress control inserts (Hi-K or graded dielectric sleeves)

• Breakout / trifurcation boots / cold-shrink boots for separating the three cores downstream of the main body

• Re-jacketing / insulating sleeves to cover trimmed insulation ends or to rebuild insulation transitions

• Sealing compounds / mastic / silicone grease / void-filling compound to prevent internal voids and to seal interfaces against moisture

• Constant-force springs / bonding springs to maintain contact and continuity between the cable metallic shield and the termination / earth connection

• Copper braids / shielding tapes / foil / screen continuity elements to tie shield layers to the termination

• Outer jacket re-sleeves to reconstruct the outer jacket where needed

• Cleaning wipes, tapes, installation tools, and installation instructions

Key Electrical & Mechanical / Performance Features (Typical / Expected)

Below is a table of typical expected (but approximate) parameters. The exact values must be confirmed from the specific 3M variants datasheet.

Relationship to Known 3M Product Families & References

• 3Ms 92-EB series, 11 kV, three-core indoor terminations datasheet describes typical kit structures, installation methods, and ranges of use. 3M Multimedia

• The 3M QT-III cold-shrink termination brochures show how termination kits include termination bodies, breakout boots, sealing, screening, etc. 3M Multimedia+23M Multimedia+2

• 3Ms general medium-voltage terminations brochure ("3M MV terminations & joints up to 33 kV") offers insight into kit composition and product philosophy: that the kits are intended for polymeric, copper-wire screened cable types and include full accessory parts. 3M Multimedia+1

• In 3Ms product catalog, 3M offers cold-shrink terminations in a wide variety of voltage levels and cross-section ranges, emphasizing ease of installation, long-term performance, and field reliability. 3M+1

Also, in a 3M catalogue document (Thorne & Derrick 3M Electrical Products catalog), there is mention of 3M 11 kV three-core termination for belted PILC / polymeric cables and joint / termination kit tables covering cross-section and insulation diameter ranges. Power and Cables

Interestingly, one table in that catalogue references a 3M Kit Ref 92-FV 621-3 for 120-240 sq mm range and a 92-AG 622-1 for 185-240 sq mm ranges (for insulation diameter 22.3 33.2 mm). That suggests 3M does cover that size bracket in their QS1000 / joint / termination product families. Power and Cables

Thus, a 3C 240 sq mm termination would likely reside in the upper variants of the 3M 11 kV three-core termination range, possibly within QS1000 / cold-shrink / transition kits that support that cross-sectional and insulation diameter bracket.