Iran Nezam Electrical Design Exam

Practice session

A three-phase oil-immersed distribution transformer installed in an indoor building substation has a rated capacity of 800 kVA and a rated secondary voltage of 400 V (line-to-line) at 50 Hz. According to INBR Topic 13 (Clause 13-4), what is the rated secondary full-load line current (In) of this transformer?

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