Porcelain Pin Insulator for Transmission and Distribution
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ANSI 56-4 Product DescriptionAbout the Porcelain pin type Insulator As the name suggests, the pin type insulator is mounted on a pin on the crossarm on the pole. There is a groove on the upper end of the insulator. The conductor passes through this groove and is tied to the insulator with annealed wire of the same material as the conductor. Pin type insulators are used for transmission and distribution of electric power at voltages up to 33 kV. Beyond operating voltage of 33 kV, the pin type insulators become too bulky and hence uneconomical. – Advantages of Porcelain pin type Insulator Specifications
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ANSI CLASS | 56-1 | 56-2 | 56-3 | 56-4 | 56-5 | |
Fig. No. | 1 / 2 | 1 / 2 | 3 | 3 | 4 | |
Main Dimension(mm) | H | 146 | 165 | 191 | 241 | 318 |
h | 50.8 | 50.8 | 50.8 | 50.8 | 63.5 | |
D | 191 | 228 | 267 | 305 | 343 | |
d | 34.9 | 34.9 | 34.9 | 34.9 | 34.9 | |
R1 | 19 | 19 | 19 | 19 | 19 | |
R2 | 14 | 14 | 14 | 14 | 14 | |
Leakage Distance (in) | 13 | 17 | 21 | 27 | 34 | |
Dry Arcing Distance (in) | 7 | 8 | 9 | 11 | 14 | |
Low Frequency Voltage | Dry Flashover | 95 | 110 | 125 | 140 | 175 |
Wet Flashover | 60 | 70 | 80 | 95 | 125 | |
Puncture | 130 | 145 | 165 | 185 | 225 | |
Critical Impulse Flashover | Positive/kV | 150 | 175 | 200 | 225 | 270 |
Negative/kV | 190 | 225 | 265 | 310 | 340 | |
Radio Influence voltage | Test Voltage | 15 | 22 | 30 | 30 | 44 |
Plain | 8000 | 12000 | 16000 | 16000 | 25000 | |
Radio Freed | 100 | 100 | 200 | 200 | 200 | |
Cantilever Strength (lb) | 2500 | 3000 | 3000 | 3000 | 3000 |
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Tags: Ceramic Insulator, Insulator, Insulator for Transmission, pk-insulator