Definition: A transformer whose iron core and windings are not immersed in insulating liquid. Its core advantages include fire and explosion resistance, no leakage, and maintenance-free operation, making it suitable for crowded areas or scenarios with high fire protection requirements.
Main Types:
Resin Dry Type Transformer (Epoxy Cast Type):
High mechanical strength and short-circuit resistance, dominating the market (SCB14/SGB series);
Impregnated Dry-Type Transformer (Nomex Paper Insulation):
High heat resistance class (Class H), superior fire protection performance, and no heavy smoke during high-temperature combustion;
Structurally divided into open-type, closed-type, and cast-type. Among them, the cast-type is most widely used due to its compact size and excellent insulation.
01
Safety Performance
Oil-free, flame-retardant and self-extinguishing, no explosion or leakage risk
02
Installation Environment
Can be installed indoors/at load centers without a dedicated room
03
Maintenance Cost
Maintenance-free (service life: 20-30 years)
04
Environmental Friendliness
No toxic gases, easy to recycle
Industrial Sector (Steel, Chemical, New Energy)
Commercial Buildings (Office Buildings, Shopping Malls)
Infrastructure (Airports, Subways, Hospitals)
Farms/Agriculture
Prioritize Class 1 energy efficiency products (e.g., SCB14-NX1). Determine capacity by "calculated load × 1.2 margin". Select IP54 protection for resistance to high humidity and dusty environments;
Choose cast-type dry-type transformers (compact size) with temperature monitoring and fan cooling systems to meet fire safety requirements;
Adopt parallel operation of two units (to ensure power supply reliability). Select products with low noise (≤55dB) and strong short-circuit resistance;
For installation near livestock sheds, choose IP54 protection + dry-type structure with capacity ranging from 50-250kVA (e.g., 125kVA SCB14). Install away from forage areas to avoid fire risks.