Fig.2: Rod post porcelain insulator
Main structural dimensions and mechanical properties of rod post porcelain insulators
Model | Nominal creep distance L mm | Structural height H mm | Outer diameter of umbrella skirt D mm | Arcing distance h mm | Minimum bending failure load kN | Minimum low temperature bending failure load kN |
QZ27.5/16-1200 | 1200 | 630 | ¡Ü230 | 490 | 16 | 14.4 |
QZ27.5/16-1400 | 1400 | 645 | 500 | 16 | 14.4 |
QZ27.5/16-1600 | 1600 | 660 | 510 | 16 | 14.4 |
QZ27.5/20-1200 | 1200 | 630 | 490 | 20 | 18 |
QZ27.5/20-1400 | 1400 | 645 | 500 | 20 | 18 |
QZ27.5/20-1600 | 1600 | 660 | 510 | 20 | 18 |
Example: QZ27.5/16-1400 refers to the rod post porcelain insulators for overhead contact system of electric railway with rated voltage 27.5 kV, bending load 16 kN, and creep distance 1,400 mm.
