NEW
Font size
Worksheets2372 Mid-term
Total questions: 10
Worksheet time: 5mins
Which of the following is a distribution primary system consisting of three-phase conductors and no neutral?
Delta
Dual
None
Wye
In a three-phase transformer where each winding has one end connected to a common grounded point is referred to as a (a)________________.
ac delta connected system
ac wye connected system
ac three phase bus
corner grounded delta bus
Which of the following best describes how a single-phase transformer is connected to a delta primary distribution system?
Each bushing is connected to a primary phase
Each be bushing of the transformer is grounded and connected to one primary phase.
Each of the three primary bushing is connected in order of ABC, BCA, or CAB
Both bushings are connected in parallel to the same phase
A typical wye distribution primary bus would consist of ____________.
three phase conductors and a grounded neutral
a neutral placed on top of one primary conductor
two phases, one high leg, and a neutral
three phases, one that is grounded
The primary connections for a single bushing, single phase transformer are__________.
one phase in either bushing and a grounded connection in the second primary bushing
only done without a fused cutout for protection of the transformer
one phase in each primary bushing
one phase connection to the primary bushing and bond connection to the tank ground
Which of the following is one function of a distribution transformer?
provide current sensing and isolation from fault currents
regulate distribution voltage to maintain quality
step secondary voltage down to primary voltage for consumer use
step primary voltage down to secondary voltage for consumer use
Which of the following BEST describes the purpose of a secondary distribution system?
to provide useable service voltage to the utility's customer
to provide a power charge for the system tap changers
to provide a secondary backup in case of primary system failure
A distribution primary system that leaves the substation and branches out in several deadend directions is a________ system.
network circuit distribution secondary feeder
radial circuit distribution feeder
loop circuit distribution feeder
dual feed distribution feeder
The primary feeder, or main, can best be described as ___________.
the part of the distribution primary that only feeds single-phase residential customers
the distribution three-phase circuit that feeds a transmission substation
the part of the distribution primary that splits off into three-phase dead ends to commercial or industrial customers
the part of the distribution circuit leaving the substation before splitting off to laterals
A three-phase circuit leaving a substation into a residential subdivision is referred to as what type of circuit?
three-phase transmission
three-phase distribution primary
three-phase distribution secondary
residential three-phase
