In a busway, bumpers are part of the___. A. In plate assemblies b. Hangers c. Kickouts d. Bus connectors

Compare and contrast Phased Changeover (installation) method and Parallel Changeover (installation) method.

Equipment ratings for the four-bus power system shown in Figure 2 are as follows: Generator 1: 500 MVA, 13.8 kV, X" = 0.20 pu Generator 2:  750 MVA, 18 kV. X" = 0.18 pu Generator 3: 1000 MVA, 20 kV. X" = 0.17 pu Transformer Tl: 500 MVA, 13.8/500 kV, X = 0.12 pU Transformer T2: 750 MVA, 18/500 kV. X = 0.10 pu Transformer T3: 1000 MVA. 20/500 kV. X = 0.10 pU A three-phase short circuit occurs at bus 1, where the prefault voltage is 525 kV. Prefault current is neglected. Use 1000 MVA, 20 kV base in the zone of generator 3. By Thevenin's and Superposition approach, determine the following: a) subtransient fault current in amperes  b) contributions to the fault current from the generators in amperes  c) voltage at bus 2 during fault in kV

Why are single-phase distribution transformers made whit the low-voltage winding in two sections? A- to make two voltages available on the secondary side, B- to minimize losses, C- to provide a spare, D- none The neutral conductor on the secondary side of a single-phase 3-wire distribution transforme carries the____. A- total load current of both outside conductors. B- product of currents in both of  the outside conductors, C- difference in the currents between both the outside conductors, D- none The primary purpose of a control transformer is to reduce the line ...... A- current to the value needed to operate control circuits, B- wattage to the value needed to operate control circuits, C-voltage to the value needed to operate control circuits, D- none