Medium Voltage Product
Flexible Un-screened Silicone Bushing Boot
CSB1

Technical Data
Properties | Test Methods | Typical Values |
Breakdown Strength (kV/mm) | IEC 243 | ≥ 20 |
Broken Extension Rate (%) | ASTM D 2671 | ≥ 300 |
Tensile Strength (MPa) | ASTM D 2671 | ≥ 6 |
Volume Conduct Rate (Ω.m) | IEC 93 | ≥ 1014 |
Maximum System Voltage (kV) | 17.5 |
Description
These are pre-molded un-screened silicone insulating bushing boots to be used on switchgear and transformer connections up to 17.5 kV. Its main function is to protect, insulate and seal, thus improving the Phase-to-Phase and Phase-to-Ground insulation. It further protects against flashover where air clearances are insufficient.
Features
- Simple and easy to install
- Unique bushing adaptor/connection provides superior moisture ingress protection
- Outstanding resistance to weathering and tracking
- Extended shelf life
- Meets IEC60502-4 and GB12706.4-2002 standards
- Easy to remove and re-install
- No specialised tools required
- Immediate energizing after installation

Dimensions

NOTE: All Dimensions in mm
74 Technology Crescent, Klipriver Business Park, Klipriver
Tel: 011 868 3783 Fax: 011 868 3773
E-mail: office@airshrinksa.co.za Website: www.cip-airshrink.co.za

38
Medium Voltage Product
Flexible Un-screened Silicone T-Shaped Bushing Boots
AUSCC

Technical Data
Properties | Test Methods | Typical Values |
Breakdown Strength (kV/mm) | IEC 243 | ≥ 20 |
Broken Extension Rate (%) | ASTM D 2671 | ≥ 300 |
Tensile Strength (MPa) | ASTM D 2671 | ≥ 6 |
Volume Conduct Rate (Ω.m) | IEC 93 | ≥ 1014 |
Maximum System Voltage (kV) | 17.5 |
Dimensions

NOTE: All dimensions in mm
Description
These are insulated T-shaped (right angled) pre-molded un-screened silicone bushing boots suitable for use on 12kV Type “C” 630A bushings. It has a very compact profile making it suitable for use in compact gas-insulated secondary switchgear where the spacing between bushings is significantly reduced. The premolded shape ensures optimal/full contact over the entire Type “C” bushing profile thus improving its ability to eliminate unwanted leakage currents.
Features
- Quick and easy to install
- Easy to remove and re-install
- No specialized tools required
- Compact profile provides for greater air clearances (P-P & P-E)
- In accordance with requirements of NRS012 / NRS053
- Non tracking elastomeric housing offers excellent erosion resistance, dielectric properties and environmental resistance
- No slip/slide off the Type “C” bushings once installed
- Suitable to be used with all indoor terminations
- Accommodates bulky torque shear lugs
Applications (12 kV only)
- Compact SF6 gas-insulated secondary switchgear (RMU’s and Type B minisubstations)
- Metal box filled with air
- Distribution tranformers
- CT – VT metering units
74 Technology Crescent, Klipriver Business Park, Klipriver
Tel: 011 868 3783 Fax: 011 868 3773
E-mail: office@airshrinksa.co.za Website: www.cip-airshrink.co.za

39
Medium Voltage Products
Anti-Tracking Right Angle and Straight Boots (Heat shrinkable)
AHMR & AHMS

Description
AHMR right angled and AHMS straight anti-tracking heat shrinkable bushing boots are used for insulating bushings on switchgear and transformers. Its function is to protect, insulate and seal. It further protects against flash over where air clearances are insufficient.
Features
- UV resistant
- Resistance to harsh weather and environmental conditions
- Red mastic inner lining offers reliable protection against moisture ingress
- Anti-tracking properties
- Minimum recovery temperature 110°C
Technical Data
Properties | Test Methods | Typical Values |
Tensile Strength (MPa) | ASTM D 2671 | ≥ 12 |
Tensile Strength after Thermal Aging (MPa) | ASTM D 2671/120°C, 168 hrs | ≥ 85 |
Ultimate Elongation (%) | ASTM D 2671 | ≥ 300 |
Ultimate Elongation after Thermal Aging (%) | ASTM D 2671/120°C, 168 hrs | ≥ 200 |
Dielectric Strength (kV/mm) | IEC 243 | ≥ 15 |
Volume Resistance (Ω.m) | IEC93 | ≥ 1014 |
Tracking Resistance | ASTM D 2303/3.75 kV, 1 hr | Pass |
Water Absorption (%) | ISO 62 | ≤ 1 |
Flammability (oxygen index) | ISO 4589 | ≥ 25 |
Copper Corrosion | ASTM D 2671/120°C, 168 hrs | No Corrosion |
Cold Bend | ASTM D 2671/-40°C, 4 hrs | No Cracking |
Dimensions

Product | As supplied (mm) | After recovery (mm) | ||||||||
D1 (Min.) |
D2 (Min.) |
D1 (Max.) |
D2 (Max.) |
L1 (Nom.) |
L2 (±10%) |
L (±10%) |
W1 (±10%) |
W2 (±10%) |
||
![]() |
AHMR80/36 | 80 | 35 | 36 | 18 | 170 | 125 | 4.2 | 3.5 | |
AHMR80/50 | 80 | 50 | 36 | 18 | 170 | 125 | 3.8 | 3.5 | ||
AHMR80/50A | 80 | 50 | 36 | 27 | 160 | 140 | 3.8 | 3.5 | ||
AHMR95/70 | 95 | 70 | 38 | 28 | 160 | 140 | 4.2 | 4.8 | ||
AHMR145/68 | 145 | 68 | 72 | 34 | 215 | 140 | 4.0 | 4.0 | ||
![]() |
AHMS80/34 | 80 | 34 | 35 | 20 | 145 | 30 | 220 | 3.2 | 3.2 |
AHMS80/58 | 80 | 58 | 35 | 20 | 145 | 30 | 220 | 3.2 | 3.2 | |
AHMS140/90 | 140 | 90 | 65 | 33 | 155 | 40 | 320 | 4.0 | 4.0 |
Note: D1 and D2 are inner diameter
74 Technology Crescent, Klipriver Business Park, Klipriver
Tel: 011 868 3783 Fax: 011 868 3773
E-mail: office@airshrinksa.co.za Website: www.cip-airshrink.co.za
