Trio Tec transformers

Low loss, low maintenance cost
Space saving compact design
Superior short circuit strength
Long life expectancy
Fire resistance and self – extinguishing
Easy installation and connection
Free from partial discharge
Moisture proof
Smooth surfaces of the moulded HV & LV coils minimize the accumulation of air dust and improve effective cooling
Higher output can be achieved with integrally arranged forced cooling arrangement
The HV & LV coils are supported on the top and bottom with epoxy blocks cushioned with resilient parts to permit expansion and contraction

The cores used are manufactured from high quality, low loss, grain oriented cold rolled silicon steel sheets, which are all finished according to slitting and length cutting lines by auto numerical control cutting machines
The choice and the grade and the cutting pattern and the method of assembly minimized the loss level and the no-load current with the effect of very low noise level
Core surfaces are sealed with insulating resin to prevent from moisture and corrosion

DISC winding is used for HV coils
H.V. windings are made of double enameled class F copper conductors with DuPont make NOMEX paper as inter layer insulation
The HV discs are vacuum pressure impregnated with epoxy resin before casting which provides very low partial discharge and avoid ageing

LV windings are made of fiberglass insulated copper strip of various size confirming to class H insulation
The wound coil is casted with filled epoxy resin and polymerized in an oven, to withstand safely the electrodynamic forces present in a short circuit

A particular attention is always given to the testing of the transformer, which is done as per IEC 60076-11 standard