Draw a single line per-unit impedance diagram for the system whose single line di Figure 2. The ratings of the components in the power system are given below, Generator (1): 40MVA, 13.8kV, R:3% X=80% Motor (2): 20MVA, 13.8kV, R:3% X=80% Motor (3): 10MVA, 13.2kV; R:3% X-100% Y-A Transformers: 20MVA, 13.8/138kV, R:2% X=10% Line 1: R:10 Q X=j500 Line 2: R:5 Q X=j300 Line 3: R:5 ΩΧ330Ω Select a base of 40MVA and 128kV in the transmission line 1. (25pts.) Region 2 AY YA Region 1 Region 3

Still confused about how you calculated the current. Could you please elaborate a little? thank you

what is the statement of Lenz law.

List and describe the different types of lighting classes available on the market. Discuss the different types of lights available for these classifications, say 5 key types of light bulb/ fitting per class. In addition, what types of lighting would be used in long car tunnels in comparison to a set of offices, or even streetlights? What factors would dictate the type of light used in each scenario? For the lights you think are most suitable for a tunnel and streetlight, discuss the construction of such lights and what materials need to be considered to make them suitable for their intended use.