Switchgear Applications

The Gund Company is a vertically integrated manufacturer and fabricator of engineered material solutions for switchgear applications. The switchgear insulation components we fabricate include arc chutes for circuit breakers, interphase barriers for pad mounted switchgear, bus support angle and channel, fuse clip insulators, and much more. We manufacture custom material solutions for the following types of equipment:

  • Medium & High Voltage Circuit Breakers
  • Pad Mounted (Live & Dead Front) Medium Voltage Switchgear
  • Metal Clad Medium Voltage Switchgear
  • Automatic Transfer Switches
  • Motor Control Switchgear
  • Metering Equipment
  • Low Voltage Switchgear
  • Panelboards
  • Switchboards

We supply a complete line of insulating components for a broad range of switchgear designs. These components and spare parts can be provided individually or in complete kits for a particular type of switchgear.

Switchgear Insulation Components

    • Standoff Insulators
    • Molded Parts
    • Arc Chutes
    • Baffle Insulation
    • Bushing Insulation
    • Fuse Tubes
    • Lead Insulation
    • Bus Bar Insulation
    • Bus Bar Supports
    • Insulating Angles
    • Insulating Channels
    • Terminal Boards
    • Fuse Boards
    • Fuse Clip Insulation

  • Fuse Element Insulation
  • Interphase Insulation
  • GPO-3 Phase Barriers “Glastic®”
  • Sight Windows
  • Bolt Insulation
  • Insulating Washers
  • Insulating Nuts
  • Control Rods
  • Insulating Tubes
  • Gaskets
  • Spreader Bars

Switchgear Insulation Materials

Switchgear Insulation Materials
GPO-1, UPGM 201 GPO-3, UPGM 203 FR4, EPGC 202
Class R GPO-1, UPGM 201 G-9, MFGC 201 G-10, EPGC 201
Mica M Mica P Arboron®
Nomex® Mylar Filament Wound Tubes
Vulcanized Fibre Polycarbonate PolyProFR®
Click here to view additional material data sheets.

The Gund Company also offers a wide variety of elastomeric materials available for all your enclosure sealing, O-ring, thermal shielding and gasket needs.

View PolyPro FR Info

PolyPro FR® II is a flame retardant polypropylene that carries a UL 94 V-0 flame class rating with features that make it an economical choice for electrical insulation applications. The material is available in a range of standard thicknesses from 0.010” to 0.125”. PolyPro FR® II can be fabricated into a wide range of designs using cost effective fabrication methods such as die cutting or knife cutting. It also exhibits excellent formability characteristics allowing it to be scored, shipped flat, and quickly folded into many three-dimensional shapes. PolyPro FR® II provides a lower cost alternative for designs incorporating the use of materials such as aramid papers or polycarbonate films.

> PolyPro FR UL File #E228440
> PolyPro FR Material Data Sheet
> PolyProFR Line Card


The Gund Company is a vertically integrated manufacturer and fabricator of engineered material solutions. Since 1951, we have listened to our customers and learned about the demanding operating environments of their industries. We are AS9100D Certified and ITAR Compliant. Our custom fabricated parts are manufactured according to ISO 9001:2015 certified quality systems.

We understand the challenges of material selection and the demanding operating environment of your application. Our Application Engineering Team takes a consultative approach to understanding your requirements. By relying on our material specialists, our customers gain valuable insight into how to improve component designs to increase efficiency and functionality while reducing cost. In addition to helping with material selection, we challenge ourselves to optimize production for material yield or fabrication efficiency. As a lean enterprise, we are focused on continuous improvement and finding the most cost-effective, efficient solutions for our customers.

Please contact us today if we can help answer material property questions or provide an application specific quote. Thank you for the opportunity to earn your business.