Composite Substation Post Insulator
| Rated Voltage | Height | Dry Arcing Distance | Creepage Distance | Specified Cantilever Load (SCL) |
Rod | No. od sheds | Wet Power Frequency Withstand Voltage (kV) |
Lightning Impulse Withstand Voltage (kV) |
| 126kV | 1220±2.7mm | 1084mm | 3150mm | 20kN | 50mm | - | - | 450 |

In power transmission and distribution lines, the line post type insulator is usually used. Polymer line post insulators are the best choice for modern power systems because of their improved mechanical strength, lighter weight, and better pollution resistance.
The main factors of a composite line post insulator are:
High tensile strength and mechanical load capacity are provided by FRP( Fiberglass Reinforced Plastic) Core Rod.
Excellent hydrophobicity, tracking resistance, and aging resistance are all provided by HTV Silicone Rubber Housing.
Metal End Fittings: Providing a stable electrical connection and reliable load transfer
Polymer line post insulators offer stable electric performance and long service life in a variety of environmental conditions because of this optimized structure.

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