1-5-9
what is a typical transmission circuit voltage?
115kv
what voltage range is most electrical energy generat3ed at before being stepped up to transmission line voltage?
12 to 24kv
what is a commonly used medium voltage on distribution circuits?
13.8 kv
how many main segments are there to a distribution system?
6
what is a bus in regards to a switchyard?
a common circuit that many circuits coming into the yard can be tied into
what are the four sources that are used to produce heat for making steam which most of the electrical energy produced in the world comes from
burning coal, oil, natural gas, and wood chips
what does the generation system do?
convert other forms of energy to electrical energy
what are the two main types of distribution underground systems?
direct bury and duct and maintenance vault
what type of electrical system has the largest volume of line work?
distribution
what kind of network is used for heavily loaded downtown areas in a city?
dual network
the three main systems an electrical system can be broken into are
generation, transmission, and distribution
what is an advantage to an overhead distribution system versus an underground system?
it's easier to detect and repair.
if the voltage is doubled, can the energy that's transmitted be doubled without an increase of line losses?
no
is the power plant a main segment of a distribution system?
no
when an operator has remote control over the system through the use of a communications system between stations, that type of control is known as?
supervisory control
how are cogeneration plants different from regular commercial generating stations?
the heat, after it generates electricity, is later sold to a central heating plant or manufacturer
what is an advantage to an underground distribution system over an overhead system?
there is less public exposure to the possibility of electric shock
what is the purpose of a transmission line tower and insulators?
to keep high voltage conductors insulated from ground and out of reach of accidental contact
the reference material compares a radial distribution system to a what?
tree
telephone lines, fiber-optic cable, radios, power line carriers, microwave systems and satellites are six types of communications systems used for?
utilities to provide control for their systems
are generating stations interconnected by transmission lines into giant regional pools or grids that cross utility boundaries?
yes
are substations used as voltage changing stations?
yes
can electrical energy be transported economically over long distances?
yes
