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

Tel: 011 868 3783 • Fax: 011 868 3773
E-mail: office@airshrinksa.co.za
www.airshrinksa.co.za

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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

Tel: 011 868 3783 • Fax: 011 868 3773
E-mail: office@airshrinksa.co.za
www.airshrinksa.co.za

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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

 

Tel: 011 868 3783 • Fax: 011 868 3773
E-mail: office@airshrinksa.co.za
www.airshrinksa.co.za

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