1. Technical characteristics of dry-type transformers
Fire and explosion prevention: In case of malfunction, it is not easy to catch fire and can be directly installed in indoor load centers;
Safe and environmentally friendly: no leakage pollution, no oil waste disposal issues, low operating noise;
Maintenance free: The winding is sealed with epoxy resin to prevent moisture, dust, and corrosion;
Strong overload capacity: The air cooling heat dissipation efficiency is stable, and the short-term overload capacity can be increased by about 40% under forced air cooling;
High insulation reliability: The cured resin insulation layer is dense, moisture resistant, and dirt resistant, suitable for high humidity and dusty environments;
Compact structure: small size, light weight, small footprint, and lower cost of supporting civil engineering equipment room;
Complete protection: It can be equipped with a temperature control and temperature display system, which can monitor the winding temperature in real time, provide over temperature alarm and trip protection, and automatically control the fan to start and dissipate heat due to over temperature;
2. Product features
2.1 Design standards: GB, IEC
2.2 Capacity (MVA): 0.1 to 8
2.3 Voltage (KV): 0.1-35
2.4 Cooling method: AN (self cooling)/AF (air cooling)
2.5 Installation location: indoor dedicated distribution room, commercial complex distribution substation, industrial plant substation, urban indoor substation, underground pipe gallery distribution room
2.6 Application scenarios: office buildings, large shopping malls, hospitals, schools, data centers, rail transit, subway tunnels, underground garages, chemical plants, ports and docks, high-rise buildings, new energy photovoltaic/wind power boosting stations, municipal public substations, precision manufacturing workshops.
2.7 Insulation level: F or H level
2.8 Operating environment
Environmental temperature: maximum temperature+40 ℃, minimum temperature -35 ℃;
Altitude: ≤ 1000m, high altitude can be customized with reinforced insulation type;
Air conditions: no corrosive gases, no flammable or explosive dust, relative humidity ≤ 95% (no condensation at 25 ℃);
Installation environment: Good indoor ventilation, avoiding long-term water accumulation and exposure to sunlight; Outdoor use requires a protective casing.
2.9 Types
According to insulation structure: epoxy resin cast dry-type transformer, non encapsulated F/H grade dry-type transformer;
By voltage regulation method: Non excited voltage regulation (NLTC) dry-type transformer, on load voltage regulation (OLTC) dry-type transformer;
By purpose: Distribution dry-type transformer, special dry-type transformer (rectifier, traction, isolation, photovoltaic boost);
According to protection level: IP00 open type, IP20/IP23 protective shell type.
