Bus Bar and Odd-shape Heat Shrinkable Tubing

A special heat shrink tubing often used for insulating square, round or rectangular bus bar which is rated from 5kV-35kV. It can also be used for inline bolted connections of rectangular bus bars. The tubing is a cross-linked polyolefin and is the color orange/red . This tubing has good solvent and excellent tracking resistance as well as high resistance to splitting.The tubing shrinks easily to form the insulating cover.

Features:

• Approximately 2.5:1 Shrink Ratio (shrinks to less than 1/2 its original diameter)
• Meets requirements of ANSI/IEEE Standard 37.20.
• Flame retardant; self extinguishing
• Excellent physical properties including its dielectric strength, chemical and tracking resistance as well as its flexibility conforming to bends
• Tight fit provides good heat dissipation
• For 5,8, 15, 25 and 35 kV voltage ratings
• Maximum Continuous use temperature 110°C
• Shrink Temperature of 120°C-150°C and operating temperature of -55°C to + 110°C
• Additional applications include: copper and aluminum bus bar, metal-enclosed bus bar, metal-clad switchgear and substation switchgear

For $35 extra you can get our economy model heat gun. It has two air speeds, and a temperature control dial for temperatures ranging from 250° to 1100°F

$35

Instructions for Straight Bus Bar 5–35 kV

A. Preparation
1. Clean bus bar using standard practice (e.g. use appropriate cable cleaning solvent).
2. Cut BBI–A Heat Shrinkable Tubing to required length. Use a very sharp knife or a razor knife to ensure a smooth cut with no
nicks.
3. Preheating of bus bar is recommended, especially for larger size bars. Preheat to approximately 250 – 300°F (120 – 150°C) NOTE: Preheating significantly reduces shrink time
4. Slide BBI–A Tubing into position on bus bar.
B. Shrink BBI–A Tubing
1. Shrink BBI–A Tubing onto bus bar using standard industry methods (e.g Heat shrink torch, special oven, etc.) ·.
(See figure below)
2. When installing more than one length of BBI–A Tubing on a straight bus bar section, overlap tubing by a minimum of 6 in.
(152 mm).

Keep Torch Flame Moving ·
C. Application Tips
1. KEEP TORCH FLAME MOVING to prevent burning of BBI–A Tubing.
2. For rectangular bars: Shrink the edges of the BBI–A tubing first. This will achieve a more uniform insulation thickness
around the bar.
3. BBI–A Tubing normally shrinks when it reaches approximately 250°F (120°C). CAUTION: Burn damage can occur if
tubing temperature exceeds approximately 600°F (315°C) for several minutes.
4. Dimples appearing in BBI–A Tubing during shrinkage are normal, and are removed with continued even heating.
5. Heat application should be discontinued immediately after dimples disappear from BBI–A Tubing, or when tubing has
shrunk smoothly onto bus bar.
6. Use appropriate heat shrink torch which produces a blue and yellow flame. Application of the yellow portion of flame is
recommended for optimum control of the shrink rate.
7. CAUTION: Be careful handling insulated bus bar while it is still hot. The heated BBI–A Tubing is soft and susceptible to
physical damage.
8. SAFETY: Use caution and proper safety procedures when working with open flame and high temperatures. This would include maintaining a well ventilated workplace.

Other Items