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Commonly used terms in the Electrical industry.
resistance grounded
See
low resistance grounded system
,
high-resistance grounded system
low resistance grounded system
an electrical distribution system in which the neutral is intentionally grounded through a low resistance.
Low resistance grounding will limit ground fault current to a value that significantly reduces arcing damage but still permits automatic detection and interruption of the fault current.
single line to ground fault
a fault on a three phase power line in which one conductor has become connected to ground.
single phase to ground fault
See
single line to ground fault
solidly grounded
an electrical distribution system in which one of the normal current-carrying conductors, often the neutral, is intentionally connected to ground with no impedance other than that of the conductor comprising the connection.
solidly grounded system
a grounding scheme in which the neutral wire of a power system is connected to ground at frequent intervals so as to minimize the impedance between neutral and ground.
underground distribution
a class of electric power distribution work, typically used in densely-populated urban business districts, in which conductors are carried in conduits under streets between manholes and submersible distribution transformers are mounted in underground vaults.
underground residential distribution
practices involved in the underground distribution of electric power to residential subdivisions through direct-buried cables and pad mound transformers.
ungrounded system
an electrical distribution system in which there is no intentional connection between a current-carrying conductor and ground.
zig-zag ground
(1) a grounding arrangement which is used to supply single phase grounded circuits from an ungrounded three-phase delta connected electric power line.
(2) the winding arrangement within a grounding transformer.