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IEEE Std C37.09a (Circuit-Breakers)

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nr VoltageConti-
nuous current
Power frequencyShort-circuit breaking currentMinimum opening timeArc exting-
uishing medium
Stored energy closing Designation Owner Certificate number Cert. type Contents Remarks
# kV Hz kA ms          Help Help  
138 1250 50/60 104   Stored energy closing (springs) VD4X 3812-40 ABB-DERA2456-15