Utah Admin. Code R746-312-7 - Level 1 and Level 2 Interconnection Review Screens
(1) The public utility shall perform its
review of Level 1 and Level 2 interconnection requests using the screens set
forth in Subsection R746-312-7(9)
as applicable.
(2) A generating
facility's point of common coupling must be on a portion of the public
utility's distribution system that is under the interconnection jurisdiction of
the commission and must not be on a transmission line.
(3) For interconnection of a proposed
generating facility to a radial distribution circuit, the aggregate generation
on the distribution circuit, including the proposed generating facility, must
not exceed 15% of the distribution circuit's total highest annual peak load, as
measured at the substation. For Subsection
R746-312-7(3),
annual peak load will be based on measurements taken over the 60 months before
the submittal of the application, measured for the circuit at the nearest
applicable substation.
(4) The
proposed generating facility, in aggregation with other generation on the
distribution circuit to which the proposed generating facility will
interconnect, must not contribute more than 10% to the distribution circuit's
maximum fault current at the point on the high voltage, or primary, level
nearest the proposed point of common coupling.
(5) If the proposed generating facility is to
be connected to a single-phase shared secondary, the aggregate generation
capacity connected to the shared secondary, including the proposed generating
facility, must not exceed 20 kilowatts.
(6) If a proposed single-phase generating
facility is to be connected to a transformer center tap neutral of a 240-volt
service, the addition of the proposed generating facility must not create a
current imbalance between the two sides of the 240-volt service of more than
20% of nameplate rating of the service transformer.
(7) No construction of facilities by the
public utility on its own system shall be required to accommodate the
generating facility.
(8) The
aggregate generation capacity on the distribution circuit to which the proposed
generating facility will interconnect, including the capacity of the proposed
generating facility, must not cause any distribution protective equipment,
including substation breakers, fuse cutouts, and line reclosers, or customer
equipment on the electric distribution system, to exceed 90% of the short
circuit interrupting capability of the equipment. In addition, a proposed
generating facility must not be connected to a circuit that already exceeds 90%
of the circuit's short circuit interrupting capability, before interconnection
of the facility.
(9)
Interconnection Type Screen:
(a) For a
proposed generating facility connecting to a three-phase, three wire primary
public utility distribution line, a three-phase or single-phase generator must
be connected phase-to-phase.
(b)
For a proposed generating facility connecting to a three-phase, four wire
primary public utility distribution line, a three-phase or single-phase
generator must be connected line-to-neutral and must be effectively
grounded.
(10) If there
are known or posted transient stability limitations to generating units located
in the general electrical vicinity of the proposed point of common coupling,
including within three or four transmission voltage level busses, the aggregate
generation capacity, including the proposed generating facility, connected to
the distribution low voltage side of the substation transformer feeding the
distribution circuit containing the point of common coupling may not exceed ten
megawatts.
(11) If a proposed
generating facility's point of common coupling is on a spot network, the
proposed generating facility must use an inverter-based equipment package and,
together with the aggregated other inverter-based generation, must not exceed
the smaller of 5% of a spot network's maximum load or 50 kilowatts.
Notes
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No prior version found.