Insulation class H up to 180 C
Insulation class H
Class H insulation consists of materials such as silicone elastomer and combinations of materials such as mica, fiberglass, etc. with appropriate adhesives, impregnating or coating materials such as appropriate silicone resins. Nomex is the main material.
Other materials or combinations of materials may be included in this class if it can be demonstrated by experience or testing that they can be operated at the class H temperature.
Maximum allowable temperature: (IEC60034-1 & NEMA MG1-12.43): 180C, 356F.
Class H materials
We focus on 3 Class H insulating materials:
- Nomex® Type 410
- NKN laminate
- Viledon® H 1162
Nomex® Type 410 – Aramid Paper: An insulating class H insulating paper
Nomex® 410 is DuPont's original aramid paper. In the manufacture of this product, the aramid fibers and aramid fibrids are produced in a papermaking process and then calendered. The result is an insulating paper with extremely high mechanical strength, high dielectric strength and excellent thermal stability. Nomex® 410 is available in thicknesses from 0,05 to 0,76mm.
Nomex® 410 is suitable for almost all known insulation applications in electric motors, generators and transformers. Nomex® 410 is cut and supplied in desired widths. We also use this paper to manufacture punched parts and molded parts such as cover slides and slot insulation. The aramid paper is also supplied feathered.
NKN Laminate – Nomex / Polyimide / Nomex: An H-class insulating material
The insulating paper NKN is a 3-layer laminate consisting of 3 layers: 1st layer: Nomex, 2nd layer: polyimide film , 3rd layer Nomex. For NKN Laminates calendered Nomex® aramid papers of types 464 and 416 are used.
Laminates made from NKN combine the excellent electrical and thermal properties of polyimide film with the good mechanical properties of Nomex® aramid paper. NKN is available in various overall thicknesses from 0,2 to 0,4 mm. In addition, depending on the application and manufacturer, various possible combinations of the individual layers can be laminated.
NKN is tailored and delivered to the required bandwidth. We also use this laminate to manufacture molded parts such as slot insulation and cover slides. For transformer construction, we also supply spring strips made of NKN.
Freudenberg Viledon® H 1162: Class H phase insulation
Viledon® H 1162 is a mechanically bonded aramid fleece. Viledon® H 1162 is a fleece for the electronics industry. Aramid fibers, which are the basis for H 1162, for example, exhibit excellent thermal stability and durability for insulation applications in motors, generators and transformers.
Viledon® H 1162 can be made adhesive or non-adhesive and is supplied as a stamped or molded part, as a roll or as a strip. Viledon® H 1162 is supplied as standard for rolls with a width of 1000 mm, a cutting width of 5 mm and more and a roll diameter of max. 800 mm. We use this material to manufacture punched parts for phase insulation.
