Vacuum Impregnation
The use of Vacuum or Vacuum Pressure Impregnation application techniques provides an optimum machine protection
against all types of stress by using a correctly engineered combination of impregnating resin, insulation system
Product Viscosity Temperature
Index
Typical Cure
Schedule
This is only a selection of our product portfolio, more products are available on request.
Description (Ex Website /2016)
Dobeckan® FT 2015/…EK 90 – 120 s
ISO Cup 4 mm
23 °C
200 1 h / 150 °C Single component, UL recognised, polyester-imide resin,
contains vinyl toluene, little secondary drainage, high filling
ability, excellent thermomechanical strength. For processing
of motors, generators and transformers. For dip, dip-roll, VI
and VPI application.
Dobeckan® ST NV 075-
4475
850 – 1150 mPa.s
23 °C
180 2 – 3 h /
130 °C
Single component, acrylated unsaturated polyester-imide
resin, high thermal stability, for processing of traction armatures
and field coils. For VPI application.
ELAN-protect® EP 420 650 – 800 mPa.s
25 °C
180 6 – 12 h /
165 °C
Single component, UL recognised, epoxy based resin, low
VOC, low viscosity, for processing of low, medium and high
voltage machines.For VPI application.
Epoxylite® EIP 4526 190 – 210 mPa.s
25 °C
180 6 h / 165 °C Single component, epoxy resin, low stress, for processing of
wound magnetic cores. For dip, hot dip, VI and VPI application.
Epoxylite® H 1009 # 1000 – 3500 mPa.s
25 °C
180 6 h / 130 °C
or
Single component, epoxy resin, mechanically tough and
resilient, excellent chemical and moisture resistance. Suitable
for low voltage electric motors, coils and transformers.
For dip, hot dip, VI and VPI application.
Epoxylite® TSA 220S 3300 – 5700 mPa.s
25 °C
220 12 h / 165 °C Single component, modified epoxy resin, high thermal stability,
excellent chemical and moisture resistance, for processing
of traction armatures and field coils. For VPI application.
Epoxylite® 578 EB # 3000 – 5000 mPa.s
25 °C
180 8 – 12 h /
165 °C
Single component, thixotropic epoxy resin, zero VOC,
for general purpose applications. For VPI application.
Epoxylite® 478 1700 – 2600 mPa.s
25 °C
180 6 h / 150 °C
3 h / 165 °C
Single component, UL recognised, modified epoxy resin,
resilient, high chemical and moisture resistance. Suitable for
transformers. For VI and VPI application.
and application process.
The application of resin / varnish products to electrical windings by use of Vacuum Impregnation over a conventional
dip process, provides significant benefits for the protection of wound electrical equipment, such as stators, field coils
and transformers. The removal of air content from a winding by the application of vacuum is designed to greatly reduce
the void content of the finished winding thus extending the working life of a machine due to increased thermal
dissipation as well as providing for improved mechanical properties.
The correct use of Vacuum Pressure Impregnation also permits global impregnation of rotating electrical machines
with the correctly designed insulation systems up to at least 13.8 kV specifications.