Dry type transformer

      3)35 KV class product: power frequency withstand voltage 70 KV, impulse withstand voltage 170 KV

      2)20 KV class product: power frequency withstand voltage 50 KV, impulse withstand voltage 125 KV

      1)10 KV class product: power frequency withstand voltage 35 KV, impulse withstand voltage 75 KV

    14. insulation level:

    13. insulation grade : F class

    12. protection grade:IP00, IP20( indoor), IP23( outdoor)

    11. cooling method: self cooling(AN)

    10. highest temperature rise:100K

    9. service condition: humidity 100%, environment temperature is not higher than 40

    8. short-circuit impedance :Standard impedance ( see performance parameters table)

    7. connecting symbol : YynO;Dynll( or under customer requirements)

    6. phase: 3 phase

    5. frequency: 50 Hz or 60 Hz

    4. tapping stage:

Dry type transformer