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The ANSI 52-3 is a 70kN suspension porcelain insulator for high-voltage overhead transmission lines. Multiple units are connected in series to form insulator strings, providing both electrical insulation and mechanical support.
A single insulator unit has limited insulation capacity, so multiple units are connected in series with hardware fittings to create an insulator string. The higher the voltage rating, the greater the number of units needed.
| Spacing (S) | 5 3/4 inch 146 mm |
| Diameter (D) | 10 inch 254 mm |
| Leakage distance (C/D) | 12 5/8 inch 320 mm |
| Dry arcing distance | 7 3/4 inch 197 mm |
| Coupling size | 16 mm Type B |
| Combined M&E strength | 15,000 lb 67 kN |
| Impact strength | 55 inch-lb 6.2 N·m |
| Routine proof test load | 7,500 lb 33.3 kN |
| Time load test value | 10,000 lb 44.5 kN |
| Maximum working load | 7,500 lb 33.3 kN |
| Low frequency dry flashover voltage | 80kV |
| Low frequency wet flashover voltage | 50kV |
| Critical impulse flashover voltage, positive | 125kV |
| Critical impulse flashover voltage, negative | 130kV |
| Low frequency puncture voltage | 110kV |
| RIV test voltage rms to ground Maximum RIV at 1000 kHz |
10kV 50μV |
| Corona visual lest P/C | 18/22KV |
| Approx. net weight per unit | 5.2kg |
| No. of insulators wooden crate | 6 |
All dimensional tolerances and electrical tests for our insulators strictly comply with the ANSI 29.2 industry standard.
This insulator model features a combined Mechanical and Electrical (M&E) strength rating of 15,000 lb (equivalent to 67 kN).
The leakage distance is 12 5/8 inches (320 mm), and the dry arcing distance is 7 3/4 inches (197 mm).
The insulators are packed in secure wooden crates, with 6 insulators per crate. Each unit has a net weight of approximately 5.2 kg.
The insulator has a low frequency dry flashover voltage rating of 80kV, a wet flashover voltage rating of 50kV, and a puncture voltage rating of 110kV.
