HiFLEX High Voltage (HV) Coils

Our world leading, fully cured, totally flexible insulation system

HiFLEX High Voltage Coil Fully Cured Totally Flexible Insulation System - Houghton International

HiFLEX™ is a fully cured film / mica paper / film tape with unidirectional glass to enhance mechanical characteristics, bound with an acrylic resin.

  • Coils are fully tested at point of manufacture guaranteeing dielectric integrity
  • Coils can then be step-down tested before being inserted and throughout the repair process
  • Coils are fully cured but totally flexible in the end-winding (coil extension)
  • Requires no baking after winding
  • Requires no varnishing or impregnation
  • Guaranteed storage life – the coils are fully cured so they cannot change state in storage
  • Coils are supplied in a vacuum packed, moisture proof bag inside a heavy duty wooden crate as standard
  • Class F 160℃ as standard > 6.6kV
  • Allows total flexibility in its endwinding (coil extension), which can remain flexible for the machine’s cycle
  • Guaranteed flexibility of the coils, which is ideal for large two-pole windings, rewinding in situ and for skewed alternator coils
Technical Specification
Description Resin rich hot pressed cell incorporating fully cured flexible coil extensions
Voltage Range @ 50Hz < 3,000V
  > 3,000V < 6,000V
> 6,600V < 15,000V
Guaranteed Flexibility
Full Corona Protection on Coils > 6,000V
Guaranteed Storage Life Under Approved Conditions
Tropical Climate Protection
Guaranteed Tan δ / Tip Up Integrity
Thermal Performance < Class F 160°C
> Class F 160°C @ > 11,000V
< Class H 180°C @ < 6,000V
< Class C 220°C
Surge Comparison or Turn To Turn Tested to 2 (U + 1000V)
AC Flash Tested To 2 (UN + 1000) 1.2
Moisture Proof Capability
Oven Baking Required To Cure
Fully Cured Before Insertion
Tested Before Dispatch