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HomeConnection Systems Product Catalog ​CBTM/CBTH - Americas

​CBTM/CBTH - Americas

Medium voltage crosslinked polyolefin bus bar tubing​

Medium and heavy wall anti-track heat shrink tubing specifically designed for insulating medium voltage bus bar.

Features and Benefits

  • 3:1 shrink ratio
  • Reduces bus bar clearance requirements
  • Protects against accidental flashover
  • Anti-track
  • Halogen free
  • CBTM medium wall tubing rated to 25 kV CBTH heavy wall tubing rated to 36 kV
  • Continuous operating temperature: -40°C to 125°C
  • Shrink temperature: 120°C

Standards

  • Tested to ANSI C37.20.2 standards for medium voltage switchgear applications to 36 kV
  • UL Recognized Component

Typical Applications

  • Insulation of medium voltage bus bars in switchgear equipment

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.
  • Please specify the product name, order reference number
  • Standard is red, printed, unlined, 50 ft lengths (maximum or 1 splice allowed with minimum length of 15 ft)
  • Order Example: CBTM, 1300

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

Product Properties

CBTM Medium Wall Bus Tubing: for services to 25 kV on unbolted bus bar

Order Number Expanded Recovered Application Ranges
  Internal Diameter
(min) D
Wall Thickness
(nom) w
Internal Diameter
(max) d
Wall Thickness
(nom) w
*Rectangular Bus Bar Round Bus Bar
  min max min max min max min max
  mm in mm in mm in mm in mm in mm in mm in mm in
0750 19.0 0.75 1.14 0.045 5.5 0.22 2.70 0.109 6.4 1/4 6.4 1/4 6.8 0.27 15.2 0.60
1300 33.0 1.30 1.14 0.045 10.1 0.40 2.97 0.117 12.7 1/2 28.5 1 1/8 12.4 0.49 27.9 1.10
2050 52.0 2.05 1.14 0.045 19.0 0.75 2.79 0.110 31.5 1 1/4 50.8 2 22.3 0.88 43.1 1.70
2750 69.8 2.75 1.14 0.045 25.4 1.00 2.87 0.115 44.4 1 3/4 76.2 3 29.7 1.17 58.4 2.30
3500 88.9 3.50 1.14 0.045 29.9 1.18 3.09 0.122 57.1 2 1/4 101.6 4 35.8 1.41 73.6 2.90
4700 119.3 4.70 1.14 0.045 39.9 1.57 3.20 0.126 73.0 2 7/8 142.8 5 5/8 47.7 1.88 101.6 4.00
6700 170.1 6.70 1.14 0.045 58.4 2.30 3.17 0.125 114.3 4 1/2 203.2 8 69.5 2.74 144.7 5.70

CBTH Heavy Wall Bus Tubing: for services to 36 kV on unbolted bus bar

Order Number Expanded Recovered Application Ranges
  Internal Diameter
(min) D
Wall Thickness
(nom) w
Internal Diameter
(max) d
Wall Thickness
(nom) w
Rectangular Bus Bar* Round Bus Bar
  min max min max min max min max
  mm in mm in mm in mm in mm in mm in mm in mm in
1100 27.9 1.10 1.67 0.066 8.9 0.35 3.88 0.153 9.5 3/8 12.7 1/2 10.6 0.42 17.7 0.70
2000 50.8 2.00 1.57 0.062 16.0 0.63 4.08 0.161 22.2 7/8 34.9 1 3/8 19.3 0.76 33.0 1.30
2700 68.0 2.68 1.52 0.060 22.1 0.87 4.08 0.161 34.9 1 3/8 50.8 2 26.1 1.05 43.1 1.70
3500 89.9 3.54 1.52 0.060 29.9 1.18 4.08 0.161 50.8 2 76.2 3 35.8 1.41 58.4 2.30
4700 119.9 4.72 1.57 0.062 39.9 1.57 4.19 0.165 69.8 2 3/4 111.1 4 3/8 47.7 1.88 81.2 3.20
6600 167.6 6.60 1.67 0.066 65.0 2.56 4.19 0.165 114.3 4 1/2 177.8 6 1/2 69.5 2.74 124.4 4.90

*Assume rectangular bus bars have 1/4 in thickness on min application ranges and 5/8 in thickness on max application ranges. Application ranges noted above selected to obtain minimum insulation thickness required to meet ANSI C37.20.2 withstand requirements at bus bar spacing and operating voltages noted. These spacings were determined from a limited number of test configurations. Due to the wide variety of bus bar configurations, these spacings and recovered wall thicknesses should not be employed by the user without actual verification and testing for the intended application. Spacing based on insulation wall thickness per application range of above table.

Clearances with Insulation

System Voltage BIL CBTM Medium Wall Tubing CBTH Heavy Wall Tubing
    P to P P to G P to P P to G
  kV mm in mm in mm in mm in
15 kV 95 86.0 3.4 106.0 4.2 55.0 2.2 66.0 2.6
25 kV 125 114.0 4.5 152.0 6.0 71.0 2.8 101.0 4.0
36 kV 150 165.0 6.5 203.0 8.0 142.0 5.6 190.0 7.5
15 kV 95 86.0 3.4 106.0 4.2 55.0 2.2 66.0 2.6
25 kV 125 114.0 4.5 152.0 6.0 71.0 2.8 101.0 4.0
36 kV 150 165.0 6.5 203.0 8.0 142.0 5.6 190.0 7.5

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 thinkness per application range of above table

Markets / Applications

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

Documentation

Version: 01 2018/JAN/02
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