CBTM – EMAR

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

Features and Benefits

  • Halogen free and flame retardant
  • 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

Market/Applications

  • OEM
  • Power Distribution
  • Industrial
  • Power Distribution – MV
  • Utility

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.

Order NumberExpandedRecoveredDelivery Units
Internal Diameter
(Min) D
Internal Diameter
(Max) d
Total Wall Thickness
(Nom) W
Lengths
mminmminmminmft
075019.00.7485.50.2172.700.10615.2450
130033.01.29910.10.3983.000.11815.2450
205052.02.04719.00.7482.800.11015.2450
275069.82.74825.41.0002.900.11415.2450
350088.93.50029.91.1773.100.12215.2450
4700119.34.69739.91.5713.200.12615.2450
6700170.16.69758.42.9993.200.12615.2450
Metric Dimensions
19/619.00.7486.00.2362.000.07950.00164
33/1033.01.29910.00.3942.500.09850.00164
52/1952.02.04719.00.7482.500.09825.0082
76/3076.02.99230.01.1812.500.09815.0049
100/40100.03.93740.01.5752.500.09815.0049
Application Ranges
Order NumberRectangular Bus BarsRound Bus Bars
MinMaxMin – Max
mminmminmmin
0750 and 19/66.4 x 6.40.252 x 0.2526.4 x 15.90.252 x 0.6266.8 – 15.20.268 – 0.598
1300 and 33/1012.7 x 6.40.500 x 0.25228.5 x 15.91.122 x 0.62612.4 – 27.90.488 – 1.098

2050 and 52/19

31.5 x 6.41.240 x 0.25250.8 x 15.92.000 x 0.62622.3 – 43.10.878 – 1.697
275044.4 x 6.41.748 x 0.25276.2 x 15.93.000 x 0.62629.7 – 58.41.169 – 2.299
76/3063.9 x 6.42.520 x 0.25290.1 x 15.93.547 x 0.62645.0 – 68.01.772 – 2.677
350057.1 x 6.42.248 x 0.252101.6 x 15.94.000 x 0.62635.8 – 73.6

1.409 – 2.898

100/40103.6 x 6.44.079 x 0.252114.1 x 15.94.492 x 0.62670.0 – 83.02.756 – 3.268
470073.0 x 6.42.874 x 0.252142.8 x 15.95.622 x 0.62647.7 – 101.61.878 – 4.000
6700114.3 x 6.44.500 x 0.252203.2 x 15.98.000 x 0.62669.5 – 144.72.736 – 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 VoltageBIL kVCBTM Medium Wall Tubing
P to PP to G
mminmmin
15 kV95.086.03.386106.04.173
25 kV125.0114.04.488152.05.984
36 kV150.0165.06.496203.07.992

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