11.1 Supply and Utilization Voltages
There is nothing that confuses nonelectrical engineers and managers on your project team more than reading the “confusing” voltage numbers used in the specifications, drawings, and reports.
Well, there is one even more confusing item for them and that is the reactive power, discussed in‐depth in Chapter 13.
Typical low voltage (LV) and medium voltage (MV) in the world are shown in Table 11.1.
Mechanical engineers keep on asking me: “Is it 15 kV, 14.4 kV, 13.8 kV, or is it 13.2 kV? Make up your mind, please.” You may explain it to your friend mechanical engineer, but don't get surprised if he pops the same question again, two months later. If he is confused, that's to be expected. But you should not be. Let us clarify.
Yes, there exist a variety of voltages. The aforementioned list is not even complete. Simply explained, at every voltage level, there is supply and utilization or receiving voltages that are available.
The voltages on the rows listed above belong to the same system group. The higher voltages in a group are typically the supply or sending voltages assigned to the supply equipment, while those with lower numbers are the receiving or utilization voltages. ...