Vacuum Pressure Impregnation Plant

The VPI process provides many benefits to the user. it completely seals the windings against moisture and vibration, provides greater mechanical strength, and improved corona protection.

it vastly improves performance and reliability even in the hardest working environments. machines last longer and require less maintenance. VPI is a process, which provides positive payback over a short period of time.

Goltens has the biggest VPI plant operating in the region. The plant is 3m diameter x 3m depth.

The equipment is designed to process the broadest range of products, from small AC/DC could upto 11 KV machines

Plant Specification

• The stator is suspended in a sealed tank, creating a vacuum.

• A transfer valve is opened and the appropriate medium (varnish/ resin) is transferred from a storage tank into the processing tank until the stator windings are completely immersed.

• The transfer valve is then closed and the tank is held under vacuum for a period of time before being pressurized to force the medium through the multiple layers of wire and insulation (filling all voids)

Testing Facility

• Testing facility providing from 0 to 11kV (variable), 3 MW capacity
• Testing facility for bearing temperature monitoring
• Testing facility for vibration analyzing
• Insulation resistance tester up to 37KV
• Winding resistance test in Millie ohms
• Hot spot test of stator core
• Phase comparison test after rewinding
• Test equipment to test coils for internal insulation leakage
• test equipment to test rotor for internal cracks / condition
• In-house facility of rebabbitting of white metal bearing & machining
• In-house facility of dynamic balance up to 8 tons
• All kinds of lathe machines, boring machines and milling machines work in house