Project Description
Porcelain Line Post Insulator: ANSI 57-4
Porcelain insulator includes Suspension type, Pin type, Spool type, Strain/Guy type, Line Post type and Station Post type, which meet IEC, ANSI, AS, BS, etc. standards.
Line Post Insulator can be used to replace the Pin Type Insulators in a position to reinforce the operational voltage and mechanical strength of the Insulator. It is used for insulating and supporting conductors. There are two versions, tie top conductor binding and clamp top with vertical or horizontal mounting.
Line Post Insulator includes:
1. Line Post Insulator to meet ANSI C29.7
ANSI 57-1, 57-2, 57-3, 57-4, 57-5
2. Vertical Mounting Line Post Insulators to meet ANSI C29.7
ANSI 57-11, 57-12, 57-13, 57-14, 57-15
|
Fig. No. |
1 | 1 | 1 | 1 | 1 | |
| ANSI Class | 57-1L 57-1S |
57-2L 57-2S |
57-3L 57-3S |
57-4L 57-4S |
57-5L |
|
|
Creepage distance (mm) |
356 | 559 | 737 | 1015 | 1145 | |
| Dry arcing distance (mm) | 165 | 241 | 311 | 368 |
438 |
|
|
Cantilever strength (kN) |
12.5 | 12.5 | 12.5 | 12.5 |
12.5 |
|
|
Low frequency flashover (kV) |
Dry (kV) |
80 | 110 | 125 | 150 | 175 |
| Wet(kV) | 60 | 85 | 100 | 125 |
150 |
|
|
Critical impulse flashover |
Positive (kV) |
130 | 180 | 210 | 255 | 290 |
|
Negative (kV) |
155 | 205 | 260 | 340 |
380 |
|
| Radio influence voltage |
Test voltage to ground (kV) | 15 | 22 | 30 | 44 |
44 |
|
Maximum RIV at 1000kHz (uV) |
100 | 100 | 200 | 200 |
200 |
|
|
Net weight, Each, Approx (kg) |
6.8 | 10 | 11.8 | 15.9 | 18.6 | |
| Nos. in standard package (Nos.) | 6 | 3 | 3 | 2 |
2 |
|
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