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ABB GSA-OA oil-air transformer bushing  52kV
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ABB GSA-OA oil-air transformer bushing 52kV

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ABB GSA-OA oil-air transformer bushing  52kV

Ratings GSA-OA      52 73 123 145 170 

Rated voltage IEC (kV) 52 72.5 123-170 145-170 170 

Rated phase-to-earth voltage IEC (kV) 30 42 98 98 98 

Insulation class IEEE (kV) 46 69 115 138 161 

Rated line-to-ground voltage IEEE (kV) 29 44 88 88 102 

Basic Insulation Level (kV)  (Equal to dry lightning impulse withstand voltage.)  250 350 550 650 750 

Rated current (A) 2000 2000 1600 1600 1600 

Draw lead current (A) 1250 1250 1250 1250 1250 

Rated frequency (Hz) 50/60 50/60 50/60 50/60 50/60 

Temporary over voltage (kV) 52 73 170 170 170 

Wet power frequency AC (kV) 95 140 230 275 325 

Routine test 1 minute dry (kV) 120 160 260 310 365 

Nominal capacitance between conductor and test tap C1 ±10 % (pF)  Space for current transformer (mm) 0/300/500  224/430/559 351/546/682 213/314/380 251/314/380 301/395/465

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