Nowadays glass insulator has become popular in transmission and distribution network. Annaled toughened disc glass insulator has numbers of advantages over conventional porcelain insulators.
Advantages of Glass Insulator:
1. High dielectric strength
2. High resistivity
3. High tensile strength
4. Lower absorption of heat
6. Easily detection of internal defects like impurities and air bubble
7. Long service life due to lower aging characteristic
8. Cheaper in price
Model | U40B/110 | U70B/140 | U100B/140 | U120B/146 | U160B/170 | |
Main dimension, mm | D | 178 | 255 | 255 | 255 | 280 |
H | 110 | 140 | 146 | 146 | 170 | |
Creepage distance (mm) | 185 | 320 | 320 | 320 | 400 | |
Socket Coupling (mm) | 11 | 16 | 16 | 16 | 20 | |
Mechanical failing load (mm) | 40 | 70 | 100 | 120 | 160 | |
Mechanical routine test (kN) | 20 | 35 | 50 | 60 | 80 | |
Wet power frequency withstand voltage(kV) | 25 | 40 | 40 | 40 | 45 | |
Dry lightning impulse withstand voltage (kV) | 50 | 100 | 100 | 100 | 110 | |
Impulse puncture voltage (P.U) | 2.8 | 2.8 | 2.8 | 2.8 | 2.8 | |
Power frequency puncture voltage (kV) | 90 | 130 | 130 | 130 | 130 | |
Radio influence voltage (μV) | 50 | 50 | 50 | 50 | 50 | |
Corona visual test (kV) | 18/22 | 18/22 | 18/22 | 18/22 | 18/22 | |
Power frequency electric arc voltage | 0.12s/20kA | 0.12s/20kA | 0.12s/20kA | 0.12s/20kA | 0.12s/20kA | |
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