Medium Voltage Cold Applied Silicone Rubber Bushing Boot

Product Description

Medium Voltage Cold Applied Silicone Rubber bushing boot are used on screened or rubber insulated cables of 7.2 to 17.5 kV. Cold applied bushing boot is designed for use on either single or three core cables from 35 up to 400mm2, up to a maximum system voltage of 17.5 kV. The Bushing Boot can accommodate bushings with diameters between 30-70 mm. Compaq system now offers our own universal medium voltage cold applied bushing protection boot for switchgear and transformer. Manufactured from high grade silicone with excellent non tracking and erosion resistance, the boot is very flexible and just one size covers right angle or straight connections for cable size 35-400mm2.


  • No special tools required
  • No heating or filling required
  • Suitable for vertical or angled position
  • High interface pressure ensures absolute water tightness

Technical Values for 8.7/15 (17.5 kV)

S.No. Test Test Requirement Results
1. D.C. Voltage Dry Withstand 15 Minutes at 6 Uo Passed
2. A.C. Voltage Dry Withstand 5 minutes at 4.5 Uo Passed
3. Impulse Voltage at ambient temperature 10 Impulse of each Polarity (150kV) Passed
4. Electrical Heat Cycling in air 10 Cycles at 2.5 Uo Passed
5. A.C. Voltage Dry Withstand 4 hours at 4.5 Uo Passed
6. Humidity 300 h duration at 1.25 Uo Passed

Technical Values for Silicone Rubber

S.No. Description of Test Test Data
1. Volume Resistivity 1 x 10 14 ohm cm
2. Dielectric Strength 25 kv / mm (Min.)
3. Tracking & Erosion Resistance Test Passes 4.0 kV / 1 Hr
4. Dielectric Content 3.5
5. Tensile Strength 9.0 Mpa
6. Elongation 700 % (Min)
7. Tear Strength 15 N/mm
8. Low Temperature Flexibility No Cracking and Braking up to 200C°
9. Heat Shock Test No Deformation, Burning and Tearing at 2500C for 30 minutes