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Porcelain Spool Insulator The spool insulators supplied by Winning Electrical are manufactured from wet process porcelain. This process allows the spool insulators to shed water and keep dirt away, thus requiring little-to-no maintenance. They are shaped like spinning spools, which allow them to hold wires in place, and keep them from slipping off. These spool insulators are designed, manufactured and tested to the spool insulator requirements of ANSI Standard C29.3. 
Standard Type | Fig. | Main Dimensions | Strength (kN) | Low Frequency Flashover Voltage (kV) | H | D | d1 | R | Dry | Wet | Vertical | Horizontal | ANSI-53-1 | 1 | 54 | 57 | 17.5 | 11 | 8.9 | 20 | 8 | 10 | ANSI-53-2 | 1 | 76 | 80 | 17.5 | 17.5 | 13.3 | 25 | 12 | 15 | ANSI-53-3 | 2 | 81 | 76 | 17.6 | 11 | 17.8 | 25 | 12 | 15 | ANSI-53-4 | 1 | 76 | 105 | 17.5 | 16 | 20 | 25 | 25 | 15 | ANSI-53-5 | 3 | 105 | 102 | 17.5 | 11 | 27 | 35 | 18 | 25 | AS-R-1 | 4 | 54 | 57 | 17 | 12 | 9 | 20 | 8 | 9.2 | AS-R-2 | 4 | 76 | 80 | 17.5 | 17.5 | 20.1 | 15 | 66 | 9 | AS-R-8 | 4 | 32 | 57.5 | 17.5 | 9 | 5 | 20 | 9 | 12.5 | BS-1617 | 5 | 65 | 76 | 17.5 | 9 | 9.2 | 20 | 10 | 9 | BS-1617B | 5 | 75 | 89 | 17 | 12.5 | 10.2 | 25 | 12 | 12 |
Standard color is sky gray, with brown or white available upon request.
Porcelain Stay Insulator
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