Core Competence
Differentiation in Quality
MRRR System of Haegang Roebel Bar
Integrated High Compression
Hot Pressing Resin Rich System
The entire section of the stator winding is heated and compressed (30%)
with Resin Rich Mica Tape to increase the Mica density of the main insulation
and the resin is filled between strand-wire to ensure the best insulation performance as there is no gap through which air or moisture can penetrate.
Comparison of Stator Winding Insulation Systems
| Global VPI | Single Bar VPI |
Asphalt Compounding |
Resin Rich | Integrated High-Comp Resin Rich |
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|---|---|---|---|---|---|
| Forming |
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| Mica Taping |
Dry Mica Tape
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Dry Mica Tape
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Pre-preg Mica Tape
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Pre-preg Mica Tape
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Pre-preg Mica Tape
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| Vacuum Pressure lmpregnation |
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| Hot Pressing & Thermosetting |
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| VPI after Coil Assembly |
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VPI(Vacuum Pressure Impregnation) : Method of injecting epoxy resin into mica tape by vacuum and pressure
Resin Rich : Method of molding by taping a mica tape containing epoxy resin and then extracting the resin with high heat/pressure
Cross-sectional comparison of end winding part
Haegang ACE
Other Company
Verification of perfect moisture-proof ability during long-term water immersion
Confirm that no air/moisture has penetrated into the main insulation layer.
Weekly polarization index (PI) measurement during submersion, insulation condition and Hi-Pot test after 2 years