Substation Construction—Function and Types of Stations 3-4-7
The high-voltage side of a step-down transformer in a substation is normally connected to the high-voltage bus in the substation.
False
An abnormally high or low voltage could cause a circuit breaker to trip out and remove a line from service.
True
Converter stations are needed at each end of DC transmission lines to turn the DC back to AC.
True
If one transmission line fails, a substation should automatically switch over to another line in order to avoid power loss for the substation's customers.
True
The third level of substation class is the distribution/municipal/industrial type found near end users.
True
The three main parts of an electrical power system are transmission, distribution, and generation.
True
A ? is an element in a substation used to make corrections to line voltage.
capacitor
A converter substation can be used to ? .
change AC voltage to DC voltage
The ? in a substation automatically remove or open a faulted circuit so that the faulted circuit does not cause further disruption to the system.
circuit breakers
An unqualified worker may enter an energized substation if ? .
escorted by a qualified person
All transmission lines come together and are connected at the ? of a substation.
high-voltage bus
The ? in a substation will direct a high-voltage surge to ground.
lightning arrestor
The source side of individual distribution feeder circuit breakers are connected to the ? in a substation.
low-voltage bus
To make corrections to line voltage, a substation may use load tap-changer transformers, voltage regulators, capacitors, and ? .
reactors
The main purpose of a substation between the transmission system and the distribution system is to ? the voltage.
step-down
The main purpose of a substation at the generating station is to ? the voltage level for the economical transmission of power.
step-up
A ? is normally built at the meeting points of each of the three main parts of a power system.
substation
To be qualified to enter a substation, an employee should, at a minimum, be trained and certified in ? .
the minimum approach distances for the different voltages in the substation
A ? substation is used for ultra-high voltages.
transmission
One of the main purposes of equipment such as circuit breakers, relays, and associated wiring is to ? .
trip out faulted circuits