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CBTM

Medium voltage crosslinked polyolefin bus bar tubing

Medium wall anti-track heat shrinkable tubing specially designed for insulating medium voltage bus bars.

Features and Benefits

  • Halogen free
  • Reduces bus bar clearance requirements
  • Protects against accidental flashover
  • Anti-track
  • CBTM medium wall tubing rated to 25 kV
  • Shrink ratio: 3:1
  • Continuous operating temperature: -40°C to 125°C
  • Shrink temperature: 120°C

Standards

  • ANSI C37.20.2
  • ANSI C37.20.3
  • UL file # E205844

Typical Applications

  • Insulation of medium voltage bus bars in switchgear equipment, transformers and generators

Ordering

Select a dimension which will shrink snugly over the component to be covered. If recovery is restricted the resultant wall thickness will be less than specified.
  • Select options:
    • Color: Red (RD)
  • Please specify the product name, order number and options you require
  • Order example: CBTM 2050, red or CBTM 76/30, red

Please contact your Customer Service Representative for information on custom colors, sizes, lengths and material data sheet.

Product Properties

Order Number Expanded Recovered Delivery Units
  Internal Diameter
(Min) D
Internal Diameter
(Max) d
Total Wall Thickness
(Nom) W
Lengths
  MM IN MM IN MM IN M FT
0750 19.0 0.748 5.5 0.217 2.70 0.106 15.24 50
1300 33.0 1.299 10.1 0.398 3.00 0.118 15.24 50
2050 52.0 2.047 19.0 0.748 2.80 0.110 15.24 50
2750 69.8 2.748 25.4 1.000 2.90 0.114 15.24 50
3500 88.9 3.500 29.9 1.177 3.10 0.122 15.24 50
4700 119.3 4.697 39.9 1.571 3.20 0.126 15.24 50
6700 170.1 6.697 58.4 2.299 3.20 0.126 15.24 50
Metric Dimensions
19/6 19.0 0.748 6.0 0.236 2.00 0.079 50.00 164
33/10 33.0 1.299 10.0 0.394 2.50 0.098 50.00 164
52/19 52.0 2.047 19.0 0.748 2.50 0.098 25.00 82
76/30 76.0 2.992 30.0 1.181 2.50 0.098 15.00 49
100/40 100.0 3.937 40.0 1.575 2.50 0.098 15.00 49
Application Ranges
Order Number Rectangular Bus Bars Round Bus Bars
  Min Max Min - Max
  MM IN MM IN MM IN
0750 and 19/6 6.4 x 6.4 0.252 x 0.252 6.4 x 15.9 0.252 x 0.626 6.8 - 15.2 0.268 - 0.598
1300 and 33/10 12.7 x 6.4 0.500 x 0.252 28.5 x 15.9 1.122 x 0.626 12.4 - 27.9 0.488 - 1.098

2050 and 52/19

31.5 x 6.4 1.240 x 0.252 50.8 x 15.9 2.000 x 0.626 22.3 - 43.1 0.878 - 1.697
2750 44.4 x 6.4 1.748 x 0.252 76.2 x 15.9 3.000 x 0.626 29.7 - 58.4 1.169 - 2.299
76/30 63.9 x 6.4 2.520 x 0.252 90.1 x 15.9 3.547 x 0.626 45.0 - 68.0 1.772 - 2.677
3500 57.1 x 6.4 2.248 x 0.252 101.6 x 15.9 4.000 x 0.626 35.8 - 73.6

1.409 - 2.898

100/40 103.6 x 6.4 4.079 x 0.252 114.1 x 15.9 4.492 x 0.626 70.0 - 83.0 2.756 - 3.268
4700 73.0 x 6.4 2.874 x 0.252 142.8 x 15.9 5.622 x 0.626 47.7 - 101.6 1.878 - 4.000
6700 114.3 x 6.4 4.500 x 0.252 203.2 x 15.9 8.000 x 0.626 69.5 - 144.7 2.736 - 5.697

Application ranges noted above selected to obtain minimum insulation thickness required to meet ANSI C37.20.2 withstands requirements at bus bar spacing noted below. These spacings were determined from a limited number of test configurations. Due to the wide variety of bus bar configurations, these spacings should not be employed without actual testing by the user.

Clearances with Insulation

System Voltage BIL kV CBTM Medium Wall Tubing
    P to P P to G
    MM IN MM IN
5 kV 95.0 86.0 3.386 106.0 4.173
25 kV 125.0 114.0 4.488 152.0 5.984
36 kV 150.0 165.0 6.496 203.0 7.992

P to P: Phase to Phase orientation
P to G: Phase to Ground orientation
Spacing based on metal to metal dimension prior to insulation Spacing based on insulation wall thickness per application range of above table

Market / Applications

  • Industrial
  • OEM
  • Power Distribution
  • Power Distribution - MV
  • Utility

Documentation

Version: 01 2018/JAN/02
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