OIP transformer bushing is mainly used for power transformer as current for leading in out high a 

Designation :

Type character : BR     Longer length of oil side or porcelain insulator

                        BRD    Shorter length of oil porcelain insulator

Structure:           L       With CT is available, 1,2,3means different length for installing CT

Anti-pollutior type: W   Anti-pollutior type (the level is indicated at the end), none for normal type . 1,2,3means design serial number

Additional performance code : 3 the min. creepage is 25mm/kV, heavy pollution area

                         4 the min. creepage is 31mm/kV, extra heacy

Operation condition:

Altitude ≤1000m

Ambient condition: 40~ +40 (DB45)

Mounting angle:30°from the vertical

Free of chemical gas, extreme contamination and salt fog area

1100kV Air-Oil OIP Transformer bushing at site