Single layer insulation materials
Certain construction tasks in electrical engineering call for the use of single-layer insulations with a cured-resin impregnation or coating. Despite their low material thickness, KREMPEL polyester hard non-wovens, glass hard fabrics and vulcanised hard fibres are characterised by very high values for the breakdown voltage and for the creepage current resistance, as well as by their high rigidity and compressive strength.
Overview of types of single layer insulation materials with fully cured resins
| Designation
|
Structure
|
Suitable in insulation systems up to ...°C
|
Insulation class
acc. to IEC 85 |
Application
|
| AKADUR
single layer polyester hard non-woven |
Polyester non-woven with cured acrylic resin impregnation
|
130 | B | Covering quenching compartments and spacing compartment plates in automatic circuit breakers; interlayer and intermediate insulation
|
| VERDUR
single layer glass hard fabric |
Glass fabric and glass roving lattice fabric with cured epoxy resin impregnation
|
155 | F | Winding insulation in the rotor winding of turbogenerators; resin armouring for vacuum casting of cast resin transformers
|
| VULKADUR
single layer vulcanised hard fibre |
Vulcanised fibre with cured acrylic resin coating
|
120 | E | Stamped parts for automatic circuit breakers
|
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