PRESA – High frequency machine for drying and formingpressboard insulation profiles used in high power transformer coils. The HF machine is specially designed for forming and dielectric drying and forming insulating elements from 0,5 mm to 5 mm thick – made from wet insulation pressboard produced from pure unbleached cellulose taken from long-fibered coniferous wood.
The HF drying and forming process is time efficient and prevents overheating and deformations. The ready made profiles and elements allow optimal adaptation to the electric field conditions in the transformer.
The insulation components made with our individually customized machines the are suitable for use in oil-filled power transformers, due to their high purity, mechanical strength and ability to be impregnated with oil.
Full diagnostic testing and certification of the local factory EMC/EMS parameters according to the latest guidelines required by the CE & UL standards. We have our own ISO 17025 certified production control and EMC laboratory providing validation of each required process parameters and the whole technological production cycle.
ZEMAT TG High Frequency welding machines are designed and built to very strict European Environmental and Safety regulations and have custom design solutions for weld and safety control.
ECO-Friendly HF Technology incorporated in the High Frequency machines contains:
| Energy efficient ECO HF generators with microprocessor control of output power
| Low power consumption and real time power output recognition
| 90% less power consumption than with traditional heat powered welding systems
| Dynamic High-performance HF impedance matching
| Dynamic Auto Tuning and Arc protection unit
| Ultra-fast reflected power control
| RF power output efficiency at 70-90%
| Harmonic distortions eliminated by frequency band filters
| Very limited heat dissipation preventing overheating
