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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Technical Reference: Grid Connect Operation–Capstone Models C30 and C65 • Cooldown speed provides airflow over engine components until TET reaches: o 193°C(380°F)forModelC30. o 399°C(750°F)forModelC65. • A timed shutdown occurs if a BOTH TET fault (3004) occurs: o 10minutesfortheC30. o 5minutesfortheC65. 5.14. Restart This state exists to allow the user to restart the microturbine without completely shutting down first. The system controller commands the system back to the light-off speed and then transitions back to the Light state. 5.15. Shutdown Upon completion of Cooldown, the software transitions to the Shutdown state. The following events occur: • Engine speed is reduced to zero and power generation is disabled. • Cooling fans are turned off. • The output contactor opens. 5.16. Warmdown The system enters the Warmdown state when there is a system fault or abnormal user shutdown. The output contactor is opened immediately and therefore utility power is not available to support Cooldown. The dump valve is pulsed to control speed, allowing airflow for cooling, while preventing engine over-speed conditions. As heat is removed from the recuperator, the engine will coast to a stop. The following events occur: • Voltage Transient is sensed. • Power production is ceased. o Outputcontactorisopened. • The fuel solenoids are closed. o IntraApoweristurnedoff. • Energy produced while the engine decelerates is dissipated to the brake resistor. • System enters fault state as follows: o C30:AtWarmdownstatefortwominutesorenginespeed<25,000rpm. o C65:AtWarmdownstatefortwominutesorenginespeed<20,000rpm. 410027 Rev G (April 2013) Page 28 of 32 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction.PDF Image | Technical Reference Grid Connect Operation – Capstone Model C30 and C65
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