Polymer Insulators

Long Rod 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 Long Rod Insulators / Application

I-Suspension / 500 kV DC

I-Suspension / 500 kV DC

I-Suspension / 220 kV AC

I-Suspension / 220 kV AC

Double Tension / 220 kV AC

Double Tension / 220 kV AC

V-Suspension / 765 kV AC

V-Suspension / 765 kV AC

Polymer Long Rod Insulators / Lineup

Variery of polymer long rod insulators

Core size option and the mechanical rating:

Nominal Core Diameter, mmIEC Mechanical RatingANSI Mechanical RatingApplicable LengthApplicable Voltage Level
16 - 120 kN - 30,000 lbs. - 4 m - 765 kV
22 - 210 kN - 50,000 lbs. - 6 m
32 - 450 kN - 80,000 lbs.

Shed profile option

Shed profile option1 Shed profile option2
Shed profile option3 Shed profile option4

Polymer Long Rod Insulators / Test

Tensile Load-Time Test

Tensile Load-Time Test

Power Arc Test

Power Arc Test

Tracking Wheel Aging Test

Tracking Wheel Aging Test

Long Duration Aging Test

Long Duration Aging Test

Inquiry about Polymer Insulators

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