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Medium Voltage Cold Applied Silicon Rubber Bushing Boot


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 offer 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


For practical reasons, it is permissible to carry out all tests with terminations shrouded with barrier boots in a specified three-pole cable end box under consideration of the creepage lengths and clearance.

Guaranteed Technical Particular for 8.7/15 (17.5 kV)

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

Silicone Rubber - (GTP)

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 Hour
4. Dielectric Content 3.5
5. Tensil Strength 9.0 Mpa
6. Elongation (%) 700 % (Min)
7. Tear Strength 15 N/mm
8. Low Temperature Flexibility No Cracking, braking upto  200C
9. Heat Shock Test No deformation,burning,tearing at 2500C for 30 minutes