Polymer line post insulator details

Polymer line post insulator details include corona ring, ring mounting detail, adjustments with corona ring, and end fitting & base variations, core dimensions, leakage shed types, flange, clamps, etc.

Polymer line post insulator

Polymer line post insulator details:
Corona ring recommendation:

Above corona ring recommendation is based on results in test laboratory in accordance with ANSI standard. However, consideration should be given to provide better grading under certain circumstances such as high elevations, insulator configuration, conductor size & number, phase arrangement, etc.

Adjustments with corona ring:
The electrical and physical values shown in the following pages are for insulators without a corona ring. The adjustments shown in the table are required if a corona ring is used for system voltages of 230kv and above.

End fitting & base variations:
End fitting details for 1.75” polymer line post: Drop tongue, horizontal CT, tie top, vertical CT, stud base, rigid curved base
1.75” (44mm) core standard leakage shed (SN) series
Horizontal line post stud base mounting, rigid curved base mounting
The clamp top dimensions comply with ANSI C29.7-1992
Electrical ratings are based on a horizontal orientation and in accordance with ANSI C29.12-1997 & ANSI C29.17-2002. Vertical applications may experience reductions under wet conditions.

End fitting details for 2.5” polymer line post: Drop tongue, horizontal clamp top, vertical clamp top, flange, clevis
Base details for 2.5” polymer line post: rigid curved base, rigid flat base, flange base, stud base, bendable curved base, and bendable flat base
2.5” (63mm) core standard leakage shed (SN) series
Corona ring application, alternate end fitting
2.5” (63mm) core high leakage shed (SL) series

End fitting & base details for 3” polymer line post: Drop tongue, horizontal clamp top, short flange, long flange, bendable curved base, bendable flat base
End fitting & base details for 3.5” polymer line post: Drop tongue, horizontal clamp top, short flange, long flange, medium flange, bendable curved base, bendable flat base
3.5” (88mm) core standard leakage shed (SN) series


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