Arizona Administrative Code › Title 14 - PUBLIC SERVICE CORPORATIONS; CORPORATIONS AND ASSOCIATIONS; SECURITIES REGULATION › Chapter 2 - CORPORATION COMMISSION - FIXED UTILITIES › Article 26 - INTERCONNECTION OF DISTRIBUTED GENERATION FACILITIES › Section R14-2-2615 - Screens

Current through Register Vol. 30, No. 28, July 12, 2024
A. For
				Interconnection of a proposed Generating Facility to a distribution circuit,
				the aggregated generation on the circuit, including the proposed Generating
				Facility, shall not exceed 15% of the total circuit annual peak load as most
				recently measured at the substation or on the line section (if available), or
				the circuit hosting capacity limit; whichever is greater. Non-Exporting
				Systems, regardless of system size, and Inadvertent Export systems with a
				Maximum Capacity of 20 kW and under shall not be subject to this
				subsection.
B. A proposed
				Generating Facility shall not contribute more than 10% to a distribution
				circuit's maximum fault current at any point on the Distribution System,
				including during normal contingency conditions that may occur due to
				reconfiguration of the feeder or the distribution substation.
C. The proposed Maximum Capacity of a
				Generating Facility, in aggregate with the Maximum Capacity of other generation
				on a distribution circuit, shall not cause any distribution protective devices
				and equipment (including but not limited to substation breakers, fuse cutouts,
				and line reclosers), or consumer equipment on the system, to exceed 90% of the
				short circuit interrupting capability. Interconnection shall not be proposed
				for a circuit that already exceeds 90% of the short circuit interrupting
				capability.
D. A proposed
				Generating Facility shall be interconnected to the Distribution System as shown
				in the table below:
Primary Distribution Line
							 Configuration
Interconnection to Primary Distribution
							 Line
Three-phase, three wire
If a three-phase or single-phase Generating Facility,
							 Interconnection shall be phase-to-phase
Three-phase, four wire
If a three-phase (effectively grounded) or
							 single-phase Generating Facility, Interconnection shall be
							 line-to-neutral
E.
				If a proposed Generating Facility is to be interconnected on single-phase
				shared secondary, the aggregate generation capacity on the shared secondary,
				including the proposed Maximum Capacity of the Generating Facility, shall not
				exceed 75% of the service transformer rating. Non-Exporting Systems and
				Inadvertent Export systems shall not be subject to this subsection.
F. If a proposed Generating Facility is
				single-phase and is to be interconnected on a transformer center tap neutral of
				a 240-volt service, its addition shall not create an imbalance between the two
				sides of the 240-volt service of more than 20% of the nameplate rating of the
				service transformer.
G. A proposed
				Generating Facility, in aggregate with other generation interconnected to the
				distribution low-voltage side of a substation transformer feeding the
				distribution circuit where the Generating Facility would interconnect, shall
				not exceed 10 MW in an area where there are known or posted transient stability
				limitations to generating units located in the general electrical vicinity
				(e.g., three or four transmission voltage level busses from the Point of
				Interconnection). Non-Exporting Systems, regardless of system size, and
				Inadvertent Export systems with a Maximum Capacity of 20 kW and under shall not
				be subject to this subsection.
H. A
				proposed Generating Facility's Point of Interconnection shall not be on a
				transmission line.
I. A proposed
				Generating Facility shall not exceed the capacity of the Customer's existing
				electrical service unless there is a simultaneous request for an upgrade to the
				Customer's electrical service or the Generating Facility is configured never to
				inject onto the feeder power that exceeds the capacity of the electrical
				service.
J. If a proposed
				Generating Facility is non-inverter based, the Generating Facility must comply
				with the Protective Function requirements and any additional Utility
				Interconnection requirements, which shall be specified by the Utility in its
				Interconnection Manual.