Composite line post insulator

Composite line post insulator will be introduced from the Mechanical Ratings and Corona Performance, Horizontal Line Posts, Vertical Line Posts, Base Fittings, Line Fittings, Clamps and Assemblies.

Composite line post insulator   Composite line post insulator

Composite line post insulator details:
Mechanical ratings:
Line post insulators are cantilever support members, with ratings defined as follows:
Specified cantilever load (SCL)
SCL is the ultimate cantilever strength rating of the line post insulator. SCL is identical to the minimum average breaking load (ABL) rating in previous catalogs.
Reference cantilever load (RCL)
RCL represents the maximum recommended load in cantilever that a post insulator is designed to withstand during its life span. RCL equals 50 percent of the SCL, and is identical to the insulator’s maximum working load (MWL) and maximum design cantilever load (MDCL).
Combined load charts:
Line design loads for most insulators include tension, or compression, in addition to the primary vertical cantilever load. Longitudinal loading should also be considered.

Corona Performance:
Line Post Insulators: 2.5” (63.5 mm) rod Diameter Horizontal
Application: Line End Energized, Bottom End Energized
161 kv & Below: Top – NONE, Bott - NONE
230 kv: Line End Energized: Top – 2721273001, Bott – NONE; Bottom End Energized: Top – NONE, Bott - 2721273001
345 kv: Line End Energized: Top – 2721273001, Bott – NONE; Bottom End Energized: Top – NONE, Bott - 2721273001
Electrical/Dimensional changes to the Insulator with External corona ring

Composite line post insulator types:
Horizontal Line Posts:

Horizontal Line Post Insulators 2.5” (63.5 mm) rod Diameter
Clamptop: Maximum Design Tension = 2,500 lbs. (11.1 kN)
Two-Hole Blade: Maximum Design Tension = 7,500 lbs. (33.4 kN)
Horizontal Clamptop End Fitting Increases the section length dimensions by 0.75”

For voltages above 330 kV, other section lengths, or end fitting combinations, please contact us.

Vertical Line Posts:
Vertical Line Post Insulators 2.5” (63.5 mm) rod Diameter
Maximum Design Tension = 2,500 lbs. (11.1 kN)
Insulators have the same electrical and mechanical characteristics as those with a vertical clamptop on the line end and a 5” Bolt Circle on the ground end.
For voltages above 161 kV, other section lengths, or end fitting combinations, please contact us.
Vertical Line Post Assembly 2.5” (63.5 mm) rod Diameter

Notes:
Electrical values are without corona ring. For voltages equal to or greater than 220 kV, for corona rings and associated physical/electrical changes to the data. Dimensions are within allowable tolerances as specified by IEC 61952 and ANSI C29.17.
2.5’’ (63.5mm) rod diameter line post with a two hole blade on the line end and a gain base on the tower end. For other end fitting combinations, please contact us.

Composite line post insulator Base Fittings:
Base Fittings for 2.5” (63.5 mm) rod Diameter: Al & Steel Gain, Al & Steel Flat, Horizontal & Vertical Bases

Line Fittings:
Line Fittings for 2.5” (63.5 mm) rod Diameter: two Hole Blade, Horizontal clamptop, 5” Bolt circle Line or Base Fitting, Vertical clamptop Part per ANSI C29.7, Horizontal & Vertical End Fittings

Composite line post insulator Clamps and Assemblies:
Clamptop clamps, Jumper clamps and Assemblies
A practical application of line posts is for support of jumper loops on transmission lines.
Horizontal motion of the jumper is restricted, and the factor of wind sway is eliminated. Additionally, the crossarm length may be reduced. The difference in cost of insulation is not significant, but the saving in tower cost can be attractive. Regardless of cost, the use of a jumper support improves construction.
If using a single clamp, clamp position relative to the insulator may be changed by bolting the clamp through the upper hole in the insulator end fitting.
Jumper clamps are not intended for tangent span applications.


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Orient Group is a professional manufacturer and exporter of composite suspension insulator and porcelain disc suspension insulator.