Polymer Insulators

Line Post Insulator

NGK Polymer Insulators

  • History of R&D: Since 1960s. / More than 30 years.
  • Manufacturer: NGK-Locke Polymer Insulators, Inc., USA
  • Commercial Production: Since 1994 in Virginia Beach, USA.
  • Commercial Shipment: Over 500,000 insulators for more than 50 countries.
  • Actual Result: No Failure in service through all our experiences.

Polymer Long Rod Insulator for Suspension

Polymer Long Rod Insulator for Suspension /
Tension Application

Line Post Insulator

Line Post Insulator

Material & Manufacturing Process

Since 1970s, many materials and designs for polymer insulators had appeared in the market. Inappropriate ones for insulators had been selected from the market with the troubles or failures. NGK had carefully investigated such failure situations and also repeated try & error in our development history for polymer insulators. Finally our polymer insulators reached the current materials and design in 1992. Since, they have never failed by quality problems in service.

Super deep rib shed

The Histroy of NGK Polymer Insulator Development

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Polymer Line Post Insulators / Application

Horizontal LP / 230 kV

Horizontal LP / 230 kV

Jumper Support / 500 kV

Jumper Support / 500 kV

Braced LP / 345 kV

Braced LP / 345 kV

Polymer Line Post Insulators / Lineup

Variety of Polymer Line Post Insulators.

Core size option and the application range:

Nominal Core Diameter, mmRecommended Applicable Voltage Level
(Jumper Support Application)
44 46 - 69 kV
63 69 - 161 kV (- 230 kV)
76 138 - 230 kV (- 345 kV)
88 161 - 230 kV (- 500 kV)

Core size option and the mechanical rating:

Core size option and the mechanical rating:

Polymer Line Post Insulators / Test

Cyclic Cantilever Load Test

Cyclic Cantilever Load Test

AC Dry Flashover Test

AC Dry Flashover Test

Thermal Mechanical Test w/ Cantilever Load

Thermal Mechanical Test w/ Cantilever Load

Salt Fog Aging Test

Salt Fog Aging Test

Inquiry about Polymer Insulators

Please apply with the contact form and give us your comments or questions.

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