Line Post Insulator
A line post insulator is a high-strength insulating device used in overhead power line construction to support and isolate conductors on transmission and distribution poles, typically in horizontal or vertical mounting configurations. Designed for medium to high voltage systems, it ensures mechanical stability and electrical insulation, even under severe environmental and loading conditions.
Key Features:
- High dielectric strength for voltage levels up to 69 kV
- Robust mechanical load capacity for tension and cantilever stress
- Ribbed design to increase creepage distance and prevent flashover
- Available in porcelain and polymer (composite) materials
- Resistant to UV radiation, moisture, and pollution
- Suitable for vertical, horizontal, or angled mounting
- Meets ANSI, IEC, and NEMA standards
Product Details
General
| Application | Vertical Line Post |
| Cantilever Bending Strength – Max. | 2800 Lbs (12.5 kN) |
| Cantilever Bending Strength – Routine | 1235 Lbs. (5.5 kN) |
| EU RoHS Indicator | Contact Manufacturer |
| Fitting – Ground/Base | 3/4″ Stud Base |
| Fitting – Live Line End | Vertical Clamptop |
| Material | Silicone |
| Material – End Fitting | Galvanized Steel |
| Number of Sheds | 2 |
| Tension Range | 2500 lb |
Dimensions
| Diameter – Shed(s) | 4.8″ (121mm) |
| Length – Effective | 12.8 in (325.12 mm) |
| Rod Diameter | 1.5 in (38.1 mm) |
| Thickness – Housing | 0.22″ (5.5mm) |
| Weight | 6.5 lb (2.95 kg) |
Electrical Ratings
| Arc Distance – Dry | 7.4″ (188mm) |
| Creep and Leakage Distance | 11.0″ (279mm) |
| Critical Impulse Flashover (CIFO) – Positive | 150 kV |
| Flashover Voltage – 60 Hz Dry | 90 kV |
| Flashover Voltage – 60 Hz Wet | 70 kV |
| Voltage – Line | 15000 V |
| Voltage Rating | 15 kV |
| Withstand Voltage – Lightning Impulse (Positive) | 140 kV |
Certifications and Compliance
| Industry Standard(s) | ANSI |
Resources and Downloads
| Specifications | Download PDF |
| Technical Drawings | Download PDF |