CBTH

Heavy wall crosslinked Polyolefin bus bar tubing

Heavy wall anti-track heat shrinkable tubing specifically designed for insulating medium voltage bus bars.

Features and Benefits

• Halogen free
• Reduces bus bar clearance requirements
• Protects against accidental flashover
• Anti-track
• CBTH heavy wall tubing rated to 36 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: CBTH 2700, 68.0/22.1, 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
1100	27.9	1.098	8.9	0.350	3.90	0.154	15.24	50
2000	50.8	2.000	16.0	0.630	4.10	0.161	15.24	50
2700	68.0	2.677	22.1	0.870	4.10	0.161	15.24	50
3500	89.9	3.539	29.9	1.177	4.20	0.165	15.24	50
4700	119.9	4.720	39.9	1.571	4.20	0.165	15.24	50
6600	167.6	6.598	65.0	2.559	2.70	0.106	15.24	50

Order Number	Application Ranges
	Rectangular Bus Bars				Round Bus Bars
	Min		Max		Min - Max
	MM	IN	MM	IN	MM	IN
1100	9.5 x 6.4	0.374 x 0.252	12.7 x 15.9	0.500 x 0.626	10.6 - 17.7	0.417 - 0.697
2000	25.4 x 6.4	1.000 x 0.252	34.9 x 15.9	1.374 x 0.626	19.3 - 33.0	0.760 - 1.299
2700	34.9 x 6.4	1.374 x 0.252	40.8 x 15.9	1.606 x 0.626	26.1 - 43.1	1.028 - 1.697
3500	50.8 x 6.4	2.000 x 0.252	76.2 x 15.9	3.000 x 0.626	35.8 - 58.4	1.409 - 2.299
4700	69.8 x 6.4	2.748 x 0.252	111.1 x 15.9	4.374 x 0.626	47.7 - 81.2	1.878 - 3.197
6600	107.9 x 6.4	4.248 x 0.252	177.8 x 15.9	7.000 x 0.626	69.5 - 124.4	2.736 - 4.898

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
15 kV	95.0	55.0	2.165	66.0	2.598
25 kV	125.0	71.0	2.795	101.0	3.976
36 kV	150.0	142.0	5.591	190.0	7.480

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

• CBTH Technical Datasheet - EMAR
• CBTH Product Datasheet - EMAR