Standard Glass Insulator
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The Glass Insulator is composed of an iron cap, toughened glass parts and steel pin, which are combined with cement adhesive. Before assembling, the top of the steel pin is provided with a soft gasket, the inner cavity of the iron cap and the pin ends at the contact point with the cement adhesive are covered by tar. The gasket and tar are used to buff in case of damage when insulator facing thermal expansion and contraction. Toughened glass parts are used to insulate.
| Insulator Model | Rated Mechanical Failing Load (kN) | Nominal Structural Height (mm) | Nominal Diameter (mm) | Nominal Creepage Distance (mm) | Type Code (mm) | Tensile Load Test (kN) | Lightning Impulse Withstand Voltage (kV) | Power Frequency Wet Withstand Voltage (kV) | Power Frequency Flashover Voltage (kV) | Radio Interference Voltage 10kV, 1MHz z (μV) |
|---|---|---|---|---|---|---|---|---|---|---|
| U40B | 40 | 110 | 175 | 200 | 11 | 20 | 90 | 30 | 110 | 50 |
| U70B | 70 | 146 | 255 | 320 | 16 | 35 | 100 | 40 | 130 | 50 |
| U100B | 100 | 146 | 255 | 320 | 16 | 40 | 100 | 40 | 130 | 50 |
| U120B | 120 | 170 | 280 | 400 | 20 | 60 | 110 | 45 | 130 | 50 |
| U160B | 160 | 170 | 280 | 400 | 20 | 80 | 110 | 45 | 130 | 50 |
| U210B | 210 | 175 | 280 | 400 | 20 | 105 | 110 | 45 | 130 | 50 |
| U240B | 240 | 180 | 280 | 400 | 20 | 120 | 110 | 45 | 130 | 50 |
| U300B | 300 | 195 | 320 | 485 | 24 | 160 | 125 | 50 | 130 | 50 |
| U420B | 420 | 205 | 360 | 520 | 28 | 210 | 125 | 55 | 130 | 50 |
| U550B | 550 | 240 | 360 | 620 | 32 | 250 | 125 | 55 | 130 | 50 |
