Dry-Type Vacuum On-Load Tap-Changer

Model BPKΔ165-35/75-□□ Dry-Type Vacuum On-Load Tap-Changer: This tap-changer is applicable to dry-type on-load voltage-regulating power transformers with a rated voltage of 35KV and below, Y-connected up to 10000KVA, and D-connected up to 15000KVA. (1. Indoor installation. 2. Ambient temperature: maximum +40°C, minimum -25°C. 3. Altitude of installation site: not exceeding 1000 meters. 4. Relative air humidity: daily average 95%, monthly average 90%. 5. The installation site shall be free from severe explosive, corrosive gases, and conductive dust.); Model designation for three-phase BPK△165-35/75-□□: B→Three-phase, 250A and below; P→Vacuum contact switching; K→Air insulation; △→D-connection or Y-connection; 150 (165)→Rated current; 10 (35)→Voltage class; 35 (75)→Maximum longitudinal insulation; □□→Number of tap positions and voltage regulation method;