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Laminate Manufacturing by Micafil-Technology

Generator Rotor and Stator Insulation made of Resolam®, Vetresit® and Vetrelam®

Our generator insulation products manufacted by Micafil-technology are found in many power plants distributed all over the world. We are a key supplier to OEM and repair workshops. In our portfolio we have almost all customized products that are required for rotor and stator insulation. This includes various types of slot channels, many customized machined rotor parts made out of semi-finished plates and customized molded shaped parts. Moreover, we offer upper and lower stator wedges as a stator wedge kit and stator winding support mechanical fastenings. 

We manufacture laminates in our own factory by Micafil-technology:

  • Laminates made of Resolam® consist of several layers of aromatic polyamide fiber paper (Nomex) and are laminated at high pressure and temperature.
  • Laminates made of Vetresit® consist of several layers of heat resistant epoxy resin reinforced with glass fabric laminated at high pressure and temperature.
  • Laminates made of Vetrelam® consist of several layers of heat resistant epoxy resin reinforced with glass fabric and aromatic polyamide fiber paper (Nomex®).

The material selection allows a customized characteristic regarding mechanical and electrical strength, and resistance to high temperatures and moisture.


Applications

Our laminates are mainly used as slot liners and cover channels in generators or in other demanding power generation applications. Many other applications outside of the power generation can be served by our flat or shaped laminates as well.

Micafil is in a position to offer a complete kit of generator insulation including tailor-made solutions:

  • Slot liner
  • Cover channel
  • Interturn insulation
  • Corner insulation
  • Stator caps
  • End distance plates with spring elements
  • Various type of wedges
  • Various types of machined tubes
  • Stator wedges (upper and lower)
  • Various types of fastenings
  • and many other customized components


Why Hitachi Energy?

  • First choice for repair and maintenance parts for generator insulation
  • Short delivery times are possible as we manufacture laminates in our own factory
  • Highest precision for accurate and easy assembly of parts
  • Ability to deliver complete sets of insulation kits for generators
  • 100% high-voltage routine tested slot channels. Other tests on demand
  • Highest precision for easy assembly 
  • Deformation-free insulation materials with superior electrical, dielectric, tracking-resistant and thermal properties, odorless and highly resistant to solvents

Dimensions

      U sections
      Standard dimensions Tolerance
Length L mm up to 10000 ± 3
Width W mm 15 – 50 ± 1
Height H mm 5 – 190 ± 0.3
Wall thickness s mm 0.5 – 2.5 ± 0.1
Wall thickness (curved part) a mm a = s + 0.1 / – 0.2
Inside radius Ri mm 1 ± 0.2
Outside radius Ra mm Ra = Ri + s + 0.4 / – 0
Angle α ˚ 90 ± 3

Dimensions and tolerances can also be made customer specific.

        L sections U sections
        Standard dimensions Tolerance Standard dimensions Tolerance
Length   L mm up to 10000 ± 1 = 10 000 ± 1
Width   W mm 20 – 250 ± 0.25 15 – 50 ± 0.25
Height   H mm 5 – 50 ± 0.25 5 – 150 ± 0.25
Wall thickness   s mm 0.5 – 2.5 ± 0.1 0.5 – 2.5 ± 0.1
Wall thickness (curved part)   a mm a = s + 0.1 / – 0.2 a = s + 0.1 / – 0.2
Inside radius   Ri mm 3 ± 0.2 1 ± 0.2
Outside radius Vetrelam 410® Ra mm Ra = Ri + s + 0.4 / – 0 Ra = Ri + s + 0.4 / – 0
  For all other products Ra mm Ra = Ri + s + 0.3 / – 0.2 Ra = Ri + s + 0.3 / – 0.2
Angle Vetrelam 410® α ˚ 88 - 92 ± 1 88 - 92 ± 1
  For all other products α ˚ 88 - 95 ± 1 88 - 92 ± 1

Also for Vetresit® and Vetrelam®, the dimensions and tolerances can also be made customer specific.

Different shapes (besides L and U) are available. Please let us know about your dimensions.

Vetresit® 300 Laminate consisting of heat-resistant cycloaliphatic epoxy resin reinforced with glass mat.
Vetresit® 305 Laminate consisting of heat-resistant modified epoxy resin reinforced with glass mat.
Vetresit® 304 Laminate consisting of heat-resistant modified epoxy resin reinforced with one-directional roving glass fabric (UD) and with glass mat.
Vetresit® 312 Laminate consisting of heat-resistant cycloaliphatic epoxy resin reinforced with one-directional roving glass fabric (UD) and with glass mat.
Vetresit® 14 Laminate consisting of heat-resistant epoxy resin reinforced with glass fabric
Vetresit® 17 Thin laminate consisting of heat-resistant epoxy resin reinforced with glass  fabric
Vetresit® 18 Thin laminate consisting of heat-resistant tracking-proof epoxy resin reinforced with glass fabric.
Vetrelam® 402 Laminate reinforced with glass fabric, epoxy resin and aromatic polyamide fiber paper.
Vetrelam® 403 Laminate reinforced with glass fabric, epoxy resin and aromatic polyamide fiber paper with tracking-proof top layers.
Vetrelam® 404 Laminate consisting of heat-resistant epoxy resin reinforced with glass fabric, inside covered with aromatic polyamide fiber paper, outside tracking-proof covering layers
Vetrelam® 410 Laminate consisting of glass fabric, heat-resistant epoxy resin and aromatic polyamide fiber paper, additionally an electrically insulating film as reinforcing dielectric and tracking resistant top layers.
Vetrelam® 417A Laminate of heat-resistant epoxy resin reinforced with glass fabric and coated with one layer aromatic polyamide fiber paper 0.13 mm (Coated on one side).
Vetrelam® 417B Laminate of heat-resistant epoxy resin reinforced with glass fabric and coated with one layer aromatic polyamide fiber paper 0.13 mm (Coated on both side).
Vetrelam® 423 Laminate reinforced with glass fabric, epoxy resin and aromatic polyamide fiber paper with tracking-proof top layers.
Resolam® 02  Aromatic polyamide fiber paper2 standard thickness 0.76 mm.
Resolam® 03  Thin laminate consisting of heat-resistant epoxy resin reinforced with several layers of aromatic polyamide fiber paper

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