57 Series Line Post Insulator Line Post Insulator used on distribution line and transmission line upto 132KV.
57 Series Line Post Insulator
Line Post Insulator used on distribution line and transmission line upto 132KV. It is mounted rigidly on supporting structure by means of a steed or bolts. It is non-puncturable design. Connected fitting type: tie top conductor binding type and clamp top with vertical or horizontal mounting. Cantilever strength can be 5KN, 10KN, 12.5KN, 16KN. Main type: ANSI C29.7 type: 57-1, 57-2, 57-3, 57-4, 57-5, 57-11, 57-12, 57-13, 57-14, 57-15, 57-21, 57-22, 57-23, 57-24, 57-25, 57-31, 57-32, 57-33, 57-34, 57-35 Other type according to IEC383 and BS137.
Main Dimensions and Standard Particulars
ANSI Class | 57-1 | 57-2 | 57-3 | 57-4 | 57-5 |
Creepage Distance (mm) | 356 | 559 | 737 | 1015 | 1143 |
Dry Arcing Distance(mm) | 165 | 241 | 311 | 368 | 438 |
Cantilever Strength (KN) | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 |
Low Frequency Dry Flashouer(kv) | 80 | 110 | 125 | 150 | 175 |
Low Frequency Wet Flashover (kv) | 60 | 85 | 100 | 125 | 150 |
Critical Impulse Flashover Pos(kv) | 30 | 180 | 210 | 255 | 290 |
Critical Impulse Flashover Neg(kv) | 155 | 205 | 260 | 340 | 380 |
Test Voltage To Ground(kv) | 15 | 22 | 30 | 44 | 44 |
Maximum RIV at 1000KHZ (uv)1000KHZ | 100 | 100 | 200 | 200 | 200 |
Net Weight Each Approx(kg) | 5.0 | 9.5 | 11 | 16 | 18 |
Number in standard package | 6 | 3 | 3 | 2 | 2 |
line post insulator 57-2