Line Post Porcelain Insulator (Tie Top)
Standard Tie Top solid core porcelain insulators designed for upright mounting on crossarms. Features ANSI standard top groove for secure conductor binding. Compliant with ANSI C29.7 (Class 57-31 to 57-39).
Tie Top Design for Distribution
The Tie Top line post insulator features a standard wide wire groove (ANSI F-Neck) designed to accommodate various conductor sizes. Conductors are secured using standard tie wires or pre-formed ties, making it a versatile choice for distribution networks.
Solid Core Reliability
Manufactured using the wet process method, our porcelain body is Solid Core, which means it is completely puncture-proof. This design eliminates the risk of internal flashover and ensures high mechanical reliability under heavy wind and ice loads.
- Base Fitting: Galvanized iron stud base for secure upright mounting.
- RIV Performance: Low Radio Influence Voltage to prevent interference.
- Maintenance Free: Durable glazed surface resists pollution and weathering.
| ANSI Class | Creepage (mm) | Dry Arcing (mm) | Cantilever (kN) | Low Freq Flashover (Dry/Wet kV) | Impulse Flashover (Pos kV) |
|---|---|---|---|---|---|
| 57-31 | 256 | 165 | 12.5 | 70 / 50 | 120 |
| 57-32 | 559 | 241 | 12.5 | 100 / 70 | 160 |
| 57-33 | 737 | 311 | 12.5 | 125 / 95 | 200 |
| 57-34 | 1016 | 368 | 12.5 | 140 / 110 | 230 |
| 57-35 | 1143 | 438 | 12.5 | 160 / 130 | 265 |
| 57-36 | 1800 | 489 | 12.5 | -- / -- | 300 |
| 57-38 | 1728 | -- | 12.5 | -- / -- | 390 |
| 57-39 | 1805 | -- | 12.5 | -- / -- | 430 |
| 57-39 (Alt) | 2920 | -- | 12.5 | -- / -- | 550 |
* All models feature 12.5 kN (2800 lbs) Cantilever Strength.
* Compliant with ANSI C29.7 dimensional requirements.
Dimensional drawings (Fig 1 - Fig 9) available in PDF.
Download PDF Drawings