Section 407-324-7 - GENERAL TECHNICAL SCREENING CRITERIAA. For interconnection of a proposed generator to a Radial Distribution Circuit, the Aggregated Generation shall not exceed fifteen percent (15%) of the line section's annual peak load as most recently measured or calculated at the substation. A line section is that portion of a distribution system connected to a Customer bounded by automatic sectionalizing devices or the end of the distribution line.B. The Aggregated Generation on the distribution circuit, shall not contribute more than ten percent (10%) to the distribution circuit's maximum fault current at the point on the high-voltage (primary) level nearest the proposed Point of Common Coupling.C. The Aggregated Generation on the distribution circuit, shall not cause any Customer equipment on the system or distribution protective devices and equipment (including but not limited to substation breakers, fuse cutouts, and line reclosers), to exceed ninety percent (90%) of the short circuit interrupting capability. The proposed ICGF may not interconnect to a circuit that already exceeds ninety percent (90%) of the short circuit interrupting capability.D. The proposed ICGF is interconnected to the T&D Utility 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 generator, interconnection must be phase-to-phase |
Three-phase, four-wire | If a three-phase (effectively grounded) or single-phase generator, interconnection must be line-to-neutral |
E. If the proposed ICGF is to be interconnected on a single-phase shared secondary, then the capacity of the Aggregated Generation on the shared secondary shall not exceed twenty kilovolt-amps (20 kVA).F. If the proposed ICGF 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 twenty percent (20%) of nameplate rating of the service transformer.G. The Aggregated Generation interconnected to the distribution low-voltage side of the substation transformer feeding the distribution circuit where the generator proposes to interconnect shall not exceed ten megawatts (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 Common Coupling).H. The proposed ICGF's Point of Common Coupling will not be on a transmission line unless the Interconnection Request falls under an authorized exemption under Schedule 23 of the ISO-NE Small Generator Interconnection Procedures.65-407 C.M.R. ch. 324, § 7