Electrical Systems

Maxwell Nemir · 26問 · 1年前

通報

問題一覧

Which is NOT a function of the substation grounding grid?

it prevents lightning strikes within a substation

Radial tie circuits

Are connected to other circuits, which allow alternate sources of feed

DC transmission lines have ___ wires (conductors)

What is the basic function of a transmission line?

to transmit large blocks of power over long distances with minimum loss

What are the major functions of a substation

all of the above

This type of generation is associated with splitting atoms to produce steam

nuclear

This type of generation is associated with earth-heated steam

Geothermal

The “Grid” refers to

the interconnected transmission lines

This type of generation is associated with the distribution system

dispersed micro generation

Sub transmission lines are energized in the voltage range of

44 KV to 138 kv

What is the main advantage of alternating current over direct current?

AC has fewer losses than DC

The shield wires of a transmission line preform what function

lightning protection

Network grid circuits

Are installed in metropolitan areas

Electricity is generated in the voltage range of

138 KV to 24 KV

Transmission lines are energized in the voltage range of

230kV to 765kV

Where is voltage stepped up in an electrical system?

between generation and transmission

Secondaries are low voltage line that from ____ to _____ in an underground system.

Padmount to Pedestal

Generating facilities are owned

By many different companies

Current and potential transformers in a substation preform what function

measure power flow

Radial circuits

Are independent and not tied to other to other circuits

Distribution Lines are energized in the voltage range of

2kV to 34.5kV

Type of generation that is associated with oil, gas, & coal

fossil fired

Associated with Dams

hydroelectric

Associated with simultaneous generation of electricity and useful thermal energy

cogeneration

A distribution main line is distinguishable from a tap line, because on a main line

Conductors are larger

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