(Answered) 1 standard voltages are grouped into four main classes name

Engineering

1. Standard voltages are grouped into four main classes. Name them and state the approximate voltage range of each

2. Explain what is meant by the following terms:

a. Suspension-type insulator

b. Ground wire

c. Corona effect

3. Why do we seldom install underground cable (instead of aerial transmission lines) between generating stations and distant load centers?

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