This series of non-package seal three-phase dry-type power transformers not only have the advantages of the SC series, but also the carefully designed coil structure and vacuum immersion treatment process make the ZLSC series dry-type excitation rectifier transformer without local discharge, and no any cracking phenomenon throughout the lifecycle, no insulation level decrease phenomenon.

High voltage adopts continuous winding, low voltage foil winding, overall vacuum immersion and curing treatment and high strength ceramic support, with good short-circuit current withstand ability. Flame retardant, flame retardant, non-toxic, self-extinguishing, fire prevention. Under high temperature open flame burning, ZLSC series dry excitation rectifier transformer produces almost no smoke.

The insulation material adopts NOMEX paper and the insulation level is H level. The insulation layer is extremely thin and uniform, and the short-term overload capacity is extremely strong, without forced cooling, 120% long-term overload, 140% overload for 3 hours. Because this insulation material does not age and is elastic, it can be immediately loaded and operated at ±50℃.

It can be installed in an environment close to the lake, river, polluted and humid environment and a high fire protection requirement, with a large load area, suitable for high-rise buildings, airports, railway stations, docks, subway, hospitals, power plants, metallurgical industry, shopping centers, densely populated areas, as well as in oil and chemical, nuclear power plants, nuclear submarines and other places.

Safety, fire prevention and pollution free operation directly in the load center. High mechanical strength, strong short-circuit resistance, small partial discharge, good thermal stability, high reliability and long service life. Low loss and low noise, obvious energy saving effect and maintenance-free. Good heat dissipation, strong overloading capacity and increased capacity when forced air cooling is used. Good moisture resistance, suitable for operation in high humidity and other harsh environments. Perfect temperature monitoring and protection system. The intelligent signal temperature control system can automatically monitor and circulate the working temperatures of the three-phase windings respectively, can automatically start and stop the fan, and has functions such as alarm and trip.

Transformer with self-cooling and forced-air cooling, which are installed indoors and at an altitude less than 1000m with ambient temperature ranging from -25℃ to +40℃, should have good ventilation capacity. When the transformer is installed in basements or other environments with relatively poor ventilation capacity, additional cooling and ventilation devices should be added. The protection grade is IP00, IP20, IP23, etc. When the altitude is higher than 1000 meters, the user should indicate the altitude and the design will adjust the temperature rise parameters.