Fig.3: Rod suspension porcelain insulator
Main structural dimensions and mechanical properties of rod suspension porcelain insulators
Model | Nominal creep distance L mm | Structural height H mm | Outer diameter of umbrella skirt D mm | Arcing distance h mm | Minimum tensile failure load kN | Minimum low temperature tensile failure load kN |
QX27.5/70-1400 | 1400 | 645 | ¡Ü230 | 510 | 70 | 63 |
QX27.5/70-1600 | 1600 | 660 | 530 | 70 | 63 |
QX27.5/100-1400 | 1400 | 645 | 510 | 100 | 90 |
QX27.5/100-1600 | 1600 | 660 | 530 | 100 | 90 |
Example: QX27.5/70-1400 refers to the rod suspension porcelain insulators for overhead contact system of electric railway with rated voltage 27.5 kV, tensile failure load 70 kN, and creep distance 1,400 mm.
