Generator Applications

The Gund Company is a manufacturer and fabricator of engineered material solutions for power generation equipment, including steam, hydro, and wind generators. In generators, the insulation components are specific to their application and location within the generator. Standard generator components are:

• Rotor Field: The rotor is the moving component of the generator that provides the magnetic field. Its rotation is provided by the prime mover (turbine, water, the wind, motor, engine, etc.).
• Stators: The stator is the stationary part of a generator system. The stator provides power output and keeps the magnetic field (rotor) aligned.
• Exciters: In general terms, the generator rotor is a rotating electromagnet that requires direct current (DC) to excite the magnetic field. The exciter produces this DC voltage.
• Accessories and Auxiliary Components: Many generator accessories and auxiliaries require insulation components designed to be a perfect fit. They also require specialty (Auxiliary) tools, such as rotor stands, rotor coupling shoes, and temporary blocking to install the generator insulation components.

Select Your Generator Equipment
Turbine Generators	Hydro Generators	Wind Generators	Gen Set & Specialty

Turbine Generators

For a turbine generator, spinning a 50+ ton rotor at 3,600 RPMs creates well over 5Gs of centrifugal force on the generator rotor’s insulating components. When it comes to material selection options and fabrication precision, The Gund Company has decades of experience assisting customers in making insulation application engineering decisions for their generators. We supply complete generator rotor insulation kits with all insulating components for a rewind. Equally important are the stator insulation components. A tight stator wedge system minimizes wear, vibration, and abrasion and supports proper generator operation.

Outage duration is a critical aspect of cost and profitability in the power generator market space. Our outage management process covers everything from material selection reviews to reverse engineering components to project review meetings and logistics management for timely and expedited deliveries to the site or service provider. The Gund Company employs an expert staff to run our state-of-the-art fabrication equipment. Coupled with our rigorous Quality Assurance program and “in-process” inspections, The Gund Company provides our customers high-quality insulation and elastomeric products that meet the generator market’s challenging applications. Contact a generator material specialist today to request a copy of our generator repair project checklist or schedule a lunch and learn event at your facility.

Turbine Generator Rotor Insulation

• • Vented and Non-Vented Turn Insulation
  • Turn-to-Turn Insulation
  • Compound Ventilated & Standard Creepage Blocks
  • Slot Cells/Liner/Armor: U’s, L’s, Steps, & Clubfoot
  • Sub-Slot Insulation
  • Bore Copper Insulation
  • Radial & Axial Blocking
  • Temp Blocking
  • Retaining Ring Insulation
  • Rotor Shoes
  • Bearing & Oil Seal Deflector Insulation
  • Exciter Insulation
  • Creepage Block
  • Sub-slot Cover
  • Coil Blocking, Permanent Blocking, Distance Blocking
  • Ring Insulation
  • Axial Lead Tubes, Bore Tubes
  • Temporary Wood
  • Main Lead & Collector Insulation
  • Retaining Ring Insulation (Formed, molded, and single-piece available)
  • Cover Channels
  • Retaining Rings (steel)
  • Collector Rings (steel)
  • Collector Assemblies
  • Collector Housing Covers (composite or steel)
  • Bearing Shoes (composite and/or wood)

Click here to view additional material datasheets.

Turbine Generator Rotor Copper Components

• Insulated collector studs
• Main lead studs
• Collector bars
• Hydrogen bolt seals
• Bore seal plates
• Flex leads
• Coil connectors

Turbine Generator Rotor Metal Components

• Retaining Ring – Steel
• Collector Rings – Steel
• Rotor Wedge – Steel

Turbine Generator Stator Insulation

• Wedges
• Semi-Conductive Fillers & Ripple Springs
• Sliders
• Top, Center, Bottom Filler
• Side Packing
• Surge Rings
• Spacer Blocks
• Basket Rings/Binding Bands
• Washers
• Baffles
• Gaskets
• Seals & O-Rings
• Support Ring, Binding Bands
• Z-Ring
• Nose Ring
• Hydrogen Seal Insulation
• Drive Boards
• Temp Slot Boards
• Coil Spacers
• Axial Supports/Gunstocks
• Liquid plumbing (copper)
• Brazed Plumbing/Fitting assemblies (steel and copper)
• End Winging Support (both Basket Assemblies and Cones)
• L-Bracket Supports
• Air Guides, Fan Nozzles, Blower Shrouds, and Gas Shields (Composite)
• Mica Tapes and Series Loop Insulation kits

The Gund Company also offers a wide variety of elastomeric materials for all your O-ring and gasket needs.

Hydro Generators

The Gund Company is a manufacturer and fabricator of engineered material solutions to repair hydro generator stators and rotor poles. The Gund Company can deliver the right component to the proper specification, from reverse-engineered components to parts fabricated from drawings while meeting your critical delivery schedule.

We fabricate all types of stator wedges, including flat, tapered, measurement, and end wedges. We provide semi-conductive side fillers, side and top ripple springs, and center and bottom fillers. Our knowledge of materials and years of application experience allows us to serve the hydro-generator industry with unparalleled service.

Hydro Generator Rotor Insulation

• Rotor Pole Collars (Radius, Dished, Oversized)
• V-Blocks
• Rotor Pole Turn Insulation

Hydro Generator Stator Insulation

• Wedges
• Fillers
• Ripple Springs
• End Caps

Common Rotor Insulation Materials & Applications Common Stator Insulation Materials & Applications

Click here to view additional material datasheets.

The Gund Company also offers a wide variety of elastomeric materials for all your O-ring and gasket needs.

Wind Generators

The Gund Company is a manufacturer and fabricator of engineered material solutions for wind generators. The Gund Company can deliver the right component to the proper specification, from reverse-engineered components to parts fabricated from drawings while meeting your critical delivery schedule.

We fabricate all types of stator wedges, including magnetic wedges. We provide semi-conductive side fillers, side and top ripple springs, and center and bottom fillers. Our knowledge of materials and years of application experience allows us to serve the wind generator industry with unparalleled service.

Wind Generator Insulation Components

• Magnetic & Non-Magnetic Wedges
• Magnetic & Non-Magnetic Topsticks
• Barriers
• Insulators
• Filler Strips
• Slit Coil Insulation
• Formed Slot Liners
• Flexible Papers & Films

“Gen Set” & Specialty Generators

The Gund Company is a manufacturer and fabricator of engineered material solutions for Gen Sets and Specialty Generators. The Gund Company can deliver the right component to the proper specification, from reverse-engineered components to parts fabricated from drawings while meeting your critical delivery schedule.

We fabricate all types of stator wedges, side fillers, and slot insulation. Our knowledge of materials and years of application experience allows us to serve the generator industry with unparalleled service.

Gen Set & Specialty Generator Insulation Components

• • • Wedges
    • Fillers
    • Top Sticks
    • End Caps
    • Barriers
    • Insulators
    • Gaskets
    • O-Rings
    • Washers
    • Baffles
    • Impregnated Roving
    • PSA Tapes & Tie Cords

RotoGuard Insulation Protection Packages are a family of products that The Gund Company has developed. Our aerospace manufacturing process enables us to provide high-quality slot armor and turn insulation that meets or exceeds OEM specifications. The result is a series of high-quality generator insulation products that save installation and schedule time. Visit our RotoGuard^® Insulation Protection Page to Learn More.

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 their industries’ demanding operating environments. 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 understand your requirements. By relying on our material specialists, our customers gain valuable insight into improving 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 focus 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.