Line Post Insulator 57 Series Tie-Top Type
57 Series Tie-Top Type
Standard: ANSI C29.7-2015
Voltage:11-66kV
1. Tie Top Porcelain Line Post Insulators are designed for upright or angle mounting on a cross arm. They are rated from 25kV to 69kV in usual line voltage, and requiring a cantilever strength of 2800lb. For wood cross arm, long studs are supplied complete with large area flat washer ,square nut and lock nut. For steel cross arm, short studs are supplied with standard hex nuts and lock nuts.
2.Conductor grooves are the wide Tie Top ANSI standard type with head and neck designed for the use Wrap lock or conventional tie wires.
3.Gray glaze is standard for this ANSI type tie top porcelain line post insulators,Brown glaze can be supplied on order.
4.The ANSI standard No. for these Tie top porcelain line post insulators are: 57-1,57-2,57-3,57-4,57-5, with S or L after the number respectively represent short stud or long stud.For example : 57-1S means: short stud is supplied with 57-1 line post insulator.
| ANSI CLASS |
57-1 |
57-2 |
57-3 |
57-4 |
| Creepage Distance (mm) |
356 |
559 |
737 |
1015 |
| Dry Arcing Distance (mm) |
165 |
241 |
311 |
368 |
| Cantilever Strength (kN) |
12.5 |
12.5 |
12.5 |
12.5 |
| Low Frequency Flashover Voltage-Dry (kV) |
70 |
100 |
125 |
140 |
| Low Frequency Flashover Voltage-Wet (kV) |
50 |
70 |
95 |
110 |
| Critical Impulse Flashover Voltage-Pos. (kV) |
120 |
160 |
200 |
230 |
| Test Voltage to Ground (kV) |
15 |
22 |
30 |
44 |
| Maximum RIV at 1000KHZ (µv) |
100 |
100 |
200 |
200 |
| Net Weight (kg) |
4.8 |
7.8 |
11.0 |
18.0 |
Q:CAN YOU HELP US IMPROT AND EXPORT?
A:We will have a professional team to serve you.
Q:WHAT’S THE CERTIFICATES DO YOU HAVE?
A:We have certificates of ISO,CE, BV,SGS.
Q:WHAT’S YOUR WARRANTY PERIOD?
A:1 year in general.
Q:CAN YOU DO OEM SERVICE?
A:YES,we can.
Q:WHAT YOU LEAD TIME?
A:Our standard models are in stock ,as for big orders ,it take about 15 days.
Q:CAN YOU PROVIDE FREE SAMPLES?
A:Yes,please contact us to know the sample policy.
