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® WorleyParsons <br /> resources&energy <br /> for customer wiring. <br /> Motor data sheets will be provided for all three-phase motors, including those contained in <br /> vendor package equipment. <br /> Routine tests will be performed on motors in accordance with NEMA MG-1 and IEEE 112. <br /> 4.15 Electrical Protection <br /> Protective devices will be coordinated to the extent feasible to interrupt electric <br /> disturbances (fault, overload, abnormal operating condition, etc.) at the point nearest the <br /> fault, with the next upstream protective device providing back-up protection. <br /> Protective devices will operate through a lockout relay(86) or equivalent latching device or <br /> circuit to prevent automatic restart/reclose of the equipment. <br /> The settings of the 18kV generator breaker and generator protective devices will be fully <br /> coordinated with the utility system protection. <br /> In general, relays will be micro-processor based, multi-function type. Drawout protective <br /> relays will have provisions for their removal without tripping their associated circuit <br /> breakers. Protective relays and lockout relays will be provided external test switches to <br /> allow for the functional testing of the protective relaying and their associated circuits. The <br /> test switches will be provided for voltage and current inputs as well as relay trip outputs <br /> (normally-open contacts on lockout relays). <br /> As a minimum, the following protection will be provided for: <br /> • CTG (provided by the turbine generator supplier) <br /> — Generator differential (87) <br /> — Negative sequence (46) <br /> — Loss of excitation(40) <br /> — Reverse power(32) <br /> — Stator ground(64G or 59GN) <br /> — Volts/hertz(24) <br /> — Overvoltage (59) <br /> — Overfrequency and underfrequency(8 1) <br /> — System Distance Backup (21) <br /> — Voltage balance (60 FL) <br /> — Field ground(alarm only) <br /> — Out of Step (78) <br /> — Breaker failure (50BF) (For generators with low-side breakers) <br /> — Accidental Energization(50/27) <br /> Lodi Energy Center 3.4-8 LEC AFC <br /> 071608 Rev.A <br />