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Describe a typical electric system, itemizing the major parts of the system correct answers :
Generating station, step up transmission substation, transmission line, stepdown transmission
substation, sub transmission line, distribution substation, and industrial, commercial, and
residential customers
What is a transmission line/Transmission circuit? correct answers A set of conductors energized
at voltages over 69,000 volts and transmitting large blocks of lectical energy over relatively long
distances
how do the voltage levels of transmission and sub transmission lines compare? correct answers
Sub transmission lines carry medium sized blocks of power and usually form a grid between
substations. Transmission lines carry large blocks of power and stretch over long distances
When is a direct-current transmission line used? correct answers Where it is desired to transmit
large amounts of power over long distances or o interconnect two AC systems that not
synchronized
- List the functions that can be accomplished in an electric substation correct answers Switch
generators, equipment and circuits or lines in and out of system. Change AC voltage from one
level to another. Also able to change alternating current to direct current
List the component parts of the electric distribution system. correct answers Distribution
substation, distribution feeder circuits, switches, protective equipment, primary circuits,
distribution transformers, secondaries and service.
Describe a typical distribution feeder circuit. correct answers : Distribution feeder circuits leave
substations serve as a source to branch to primary circuits. Several circuits at sub and extend in
different directions to serve customers.
What is a primary circuit? correct answers All high voltage distribution circuits greater than 600
volts up to 34,500 volts
What is the purpose of the distribution transformer installed on an electric distribution circuit?
correct answers Reduces voltage of the primary circuit to the utilization voltage required to
supply the customer.
Describe an electric service. correct answers wire extended from the secondary or distribution
transformer adjacent to the customers property to the customers premises.
What functions are accomplished in an electric substation correct answers Voltage change,
voltage regulation, switching of systems, power quantities, communications, eliminate surges &
lightning, connected generators, interconnections between systems, controlled circuits, AC
converted to DC or vise versa, frequency change from one value to another.
Describe a typical electric system, itemizing the major parts of the system correct answers :
Generating station, step up transmission substation, transmission line, stepdown transmission
substation, sub transmission line, distribution substation, and industrial, commercial, and
residential customers
What is a transmission line/Transmission circuit? correct answers A set of conductors energized
at voltages over 69,000 volts and transmitting large blocks of lectical energy over relatively long
distances
how do the voltage levels of transmission and sub transmission lines compare? correct answers
Sub transmission lines carry medium sized blocks of power and usually form a grid between
substations. Transmission lines carry large blocks of power and stretch over long distances
When is a direct-current transmission line used? correct answers Where it is desired to transmit
large amounts of power over long distances or o interconnect two AC systems that not
synchronized
- List the functions that can be accomplished in an electric substation correct answers Switch
generators, equipment and circuits or lines in and out of system. Change AC voltage from one
level to another. Also able to change alternating current to direct current
List the component parts of the electric distribution system. correct answers Distribution
substation, distribution feeder circuits, switches, protective equipment, primary circuits,
distribution transformers, secondaries and service.
Describe a typical distribution feeder circuit. correct answers : Distribution feeder circuits leave
substations serve as a source to branch to primary circuits. Several circuits at sub and extend in
different directions to serve customers.
What is a primary circuit? correct answers All high voltage distribution circuits greater than 600
volts up to 34,500 volts
What is the purpose of the distribution transformer installed on an electric distribution circuit?
correct answers Reduces voltage of the primary circuit to the utilization voltage required to
supply the customer.
Describe an electric service. correct answers wire extended from the secondary or distribution
transformer adjacent to the customers property to the customers premises.
What functions are accomplished in an electric substation correct answers Voltage change,
voltage regulation, switching of systems, power quantities, communications, eliminate surges &
lightning, connected generators, interconnections between systems, controlled circuits, AC
converted to DC or vise versa, frequency change from one value to another.
