Consider the following Transformer Which is a 4 kVA transfo…

Consider the following Transformer Which is a 4 kVA transformer used to step down 480 to 120 volts to supply a single-phase two-wire circuit  The calculated primary full load current for this transformer is [Iprimary] The maximum primary over current would be [OCpI] The calculated secondary full load current for this transformer is [Isecond] The maximum secondary over current would be [OCsI]

Consider the following three-phase short circuit: With  A….

Consider the following three-phase short circuit: With  A. 1000 kVA Transformer with 480V, 3Ph, 3.5% Z B. 25′ – 500kcm copper, 3 single conductor 6 per phase service entrance in steel conduit C. 2000 A switch with 2000 A fuse x1 Fault X1 D. 400 A switch with 400 A fuse E. 50′ – 500kcm copper, 3 single conductor feeder cable in steel conduit x2 Fault X2   Using Point-to-Point calculation (using the given impedance at 100%) The total current for short circuit sym RMS at Fault X1 is [IscRMSx1] The total current for short circuit sym RMS at Fault X2 is [IscRMSx2]