2.8. ERMUSR 05-14-2019 - Laserfiche WebLink

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SCHEDULE 3-DISTRIBUTED ENERGY RESOURCES INTERCONNECTION PROCESS together with the aggregated other inverter-based DERs, shall not exceed the smaller of 5%of a network's maximum load or 50 kW.5 • The proposed DER, in aggregation with other DERs on the distribution circuit, shall not contribute more than 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. • The proposed DER, in aggregate with other Distributed Energy Resources on the distribution circuit, shall not cause any distribution protective devices and equipment (including, but not limited to, substation breakers, fuse cutouts, and line reclosers), or Interconnection Customer equipment on the system to exceed 87.5% of the short circuit interrupting capability; nor shall the interconnection be proposed for a circuit that already exceeds 87.5%of the short circuit interrupting capability. • Using the table below, determine the type of interconnection to a primary distribution line.This screen includes a review of the type of electrical service provided to the Interconnecting Customer, including line configuration and the transformer connection to limit the potential for creating over-voltages on the Area EPS Operator's electric power system due to a loss of ground during the operating time of any anti-islanding function. Table 3.1. Type of Primary Distribution Line Interconnections Primary Distribution Type of Interconnection to Results Line Type Primary Distribution Line Three-Phase, three wire Three-phase or single-phase, Pass Screen phase-to-phase Three-phase, four wire Effectively-grounded three-phase Pass Screen or single-phase, line-to-neutral • If the proposed DER is to be interconnected on single-phase shared secondary, the aggregate generation capacity on the shared secondary, including the proposed DER, shall not exceed 20 kW or 65%of the transformer nameplate rating. • If the proposed DER is single-phase and is to be interconnected on a center tap neutral of a 240-volt service, its addition shall not create an imbalance between s Network protectors are protective devices used on secondary networks(spot and grid networks)to automatically disconnect associated transformers when reverse power flow occurs. Secondary networks are most often used in densely populated downtown areas. 5 185