Composite Station Posts

These composite station posts can help users replace ANSI TR porcelain insulators. The features and advantages are shown in the following, as well as the voltage levels, end fittings, and other details.

composite station posts

Composite Station Post Insulator Components:
Iron end fitting; outer surfaces galvanized for corrosion protection
FRP Fiberglass reinforced epoxy resin core
Impenetrable Injection-molded SILICONE rubber covering and weather-sheds
End Fitting joined to core by compression process

Voltage levels:
B.I.L.: 95 kV - 1470 kV
7.5 kV to 500 kV

Composite Station Posts features:
Light Weight
Resistant to mechanical shock
Permanent protection against moisture penetration
Excellent weathering properties
Superior contamination performance
No washing needed
Resistant to vandalism
Compliance with IEEE 693 seismic Standard

Composite Station Posts advantages compared with porcelain ones:
The comparison with ANSI C29.9 Technical Reference applies only for dimensional and electrical values. The cantilever strengths exceed those of the relevent TR porcelains.
The MWL (Maximum Working Load) of the relevant TR porcelains are taken to be 40% of their cantilever rating.
The MDCL (Maximum Design Cantilever Load) of the composite insulator is defined as the maximum load that can be permanently applied to the composite insulator without mechanical degradation.
The SML (Specified Mechanical Load) is the cantilever load at which irreversible mechanical damage may be evident. In this document, the S.M.L is the withstand cantilever strength of the composite insulator and it is derived from the bending moment strength of the metal fittings.
The height of the composite insulator matches exactly the height of the relevant porcelain insulator.
The deflection values given in this document correspond to the deflections measured at the relevant ANSI TR porcelain MWL. To evaluate deflections for other loads, the ratio of deflection / load is constant up to the MDCL.

Composite Station Posts end fittings:
At lower voltages, corona rings may be considered for areas of high local contamination, and/or with altitudes > 3300 feet.
Corona rings for 2 ½ and 3 ½ inch insulators will be included in proposals where MPS considers them necessary.
The user is ultimately responsible for the proper application of corona rings.
Crimped End Fittings: All end fittings are attached using a crimping process to achieve the required tensile strength.

Adapter plates:
To comply with ANSI standards on 7” B.C.D. fittings, Orient has adopted the use of 1” adapter plates (5”-7”) shown here. The top adapter plate, when needed, has integral slotted holes to facilitate alignment during erection of bus supports.
The use of adapter plates increases the height of insulators by 1” or 2”. For retrofitting, it is possible to adjust the total height to original TR value. Contact factory for details.

Standards:
Complies with ANSI and IEEE standards + IEC tests. Seismically validated and tested per IEEE 693.
Recommended for most applications with B.I.L. ≥ 900 kV.


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