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City of Everett 26 05 73.13 - 5 <br /> Inductive Charging Infrastructure for Everett Transit <br /> 5. For reactors, provide manufacturer and model designation, voltage rating, and <br /> impedance. <br /> 6. For circuit breakers and fuses, provide manufacturer and model designation. List <br /> type of breaker, type of trip, SCCR, current rating, and breaker settings. <br /> 7. Generator short-circuit current contribution data, including short-circuit reactance, <br /> rated kVA, rated voltage, and X/R ratio. <br /> 8. Busway manufacturer and model designation, current rating, impedance, lengths, <br /> and conductor material. <br /> 9. Motor horsepower and NEMA MG 1 code letter designation. <br /> 10. Conductor sizes, lengths, number, conductor material and conduit material <br /> (magnetic or nonmagnetic). <br /> 11. Derating factors. <br /> 3.2 SHORT-CIRCUIT STUDY <br /> A. Perform study following general study procedures contained in IEEE 399. <br /> B. Calculate short-circuit currents according to IEEE 551. <br /> C. Base study on device characteristics supplied by device manufacturer. <br /> D. Extent of electrical power system to be studied is indicated on Drawings. <br /> E. Begin short-circuit current analysis at service, extending down to system overcurrent <br /> protective devices as follows: <br /> 1. To normal system low-voltage load buses where fault current is 5 kA or less. <br /> 2. Exclude equipment supplied by single transformer smaller than 75 kVA. <br /> F. Study electrical distribution system from normal and alternate power sources <br /> throughout electrical distribution system for Project. Study cases of system-switching <br /> configurations and alternate operations that could result in maximum fault conditions. <br /> G. Include ac fault-current decay from induction motors, synchronous motors, and <br /> asynchronous generators and apply to low- and medium-voltage, three-phase ac <br /> systems. Also account for fault-current do decrement to address asymmetrical <br /> requirements of interrupting equipment. <br /> H. Calculate short-circuit momentary and interrupting duties for three-phase bolted fault <br /> and single line-to-ground fault at each equipment indicated on one-line diagram. <br /> 1. For grounded systems, provide bolted line-to-ground fault-current study for areas <br /> as defined for three-phase bolted fault short-circuit study. <br /> I. Include in report identification of protective device applied outside its capacity. <br /> END OF SECTION 260573.13 <br /> 26 05 73.13 - 5 SHORT-CIRCUIT STUDIES <br />