Transformers

Transformers

Our Trafotek dry type transformer product range spans from 1 kVA low voltage VPI transformers up to 20 MVA cast resin transformers and voltages up to 24 kV. A wide range of auxiliary components can be selected for integration into our transformers.

Our transformers are made to meet customer requirements in demanding applications. We are specially focused on manufacturing transformers for different types of frequency converters and special applications. The most demanding applications are found in marine operations, electric propulsion to be more precise. 12 and 24 pulse transformers with 3 windings are used to reduce the THD level in both low and medium voltage applications.

VPI Transformers

Power range 100 kVA – 12 MVA
HV voltage range Up to 7,2 kV
LV voltage range Up to 7,2 kV
Frequency 50 or 60 Hz (others on request)
HV coil technology VPI
LV coil technology VPI
Insulation class H/180°C
Temperature rise class F (B or H as option)
Environmental class E1 (E2 as option)
Climate class C2
Fire class F1
HV winding material Aluminium (copper on request)
LV winding material Aluminium (copper on request)
Material of terminals Tinned copper
Cooling options AN, AN/AF, AF, AFWF
Transformer solutions
for frequency converters		 3-, 4- and 5-winding transformers
for 12/18/24-pulse applications
Standards IEC 60076-11

Cast Resin Transformers

Power range 500 kVA – 20 MVA
HV voltage range Up to 24 kV
LV voltage range Up to 7,2 kV
Frequency 50 or 60 Hz (others on request)
HV coil technology Cast Resin
LV coil technology Prepreg (VPI on request)
Insulation class F/155°C (H/180° on request)
Temperature rise class F (B as option)
Environmental class E2
Climatic class C2
Fire class F1
HV winding material Aluminium
LV winding material Aluminium (copper on request)
Material of terminals Tinned copper
Cooling options AN, AN/AF, AF, AFWF
Transformer solutions
for frequency converters		 3-, 4- and 5-winding transformers
for 12/18/24-pulse applications
Standards IEC 60076-11