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Horizontal post insulator properties-mechanical strength

Mechanical strength of insulators is one main of Horizontal post insulator properties. Insulators shall withstand all applicable loads specified in international standards or customer’s requirement.

Horizontal post insulator properties-mechanical strength

According to insulator specification, allowed percentages of strength ratings

Insulator types percent Strength ratings Reference standard
Ceramic or porcelain insulator
Suspension type 50% Combined mechanical and electric strength ANSI C29.2-1992
Line posts 40%
50%
Cantilever strength
Tension, compression strength
ANSI C29.7-1996
Station post 40% Cantilever, tension, compression or torsion strength ANSI C29.9-1983
Station Cap and pin 40% Cantilever, tension, compression or torsion strength ANSI C29.8-1985
Non-ceramic insulator or polymer insulator
Suspension or longrod insulator 50% Specified mechanical load(SML) ANSI C29.12-1983 and C29.13-2000
Line posts 50% Specified cantilever load(SML) or
Specified tension load(SML)
ANSI C29.17-2002 and C29.18-2003
Station posts 40% All strength ratings  

As one of insulator manufacturers, Orient Power provide mechanical strength of post insulators
◆ MDCL (Maximum Design Cantilever Load) or RCL (Rated Cantilever Load), which is typically approximately ½ of the specified Cantilever Load (SCL) or ultimate load. Assumes a load factor of 1.0 is used.
◆ SCL (Specified Cantilever Load), which is typically the ultimate tensile load of the insulator and usually the value shown is the load that puts the post in tension (away from the pole)
◆ RTL (Rated Tensile Load), which is typically approximately ½ of the specified tensile load (STL).

Mechanical strength is Horizontal post insulator properties including post insulator strength and end fittings strength. Orient provides insulator hardware fittings strength.

 

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