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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Technical Reference: Grid Connect Operation–Capstone Models C30 and C65 5.7. Prepare to Start When a Start command is issued, the system transitions to the Prepare to Start state. The following events occur: • Cooling fans are turned on. • Utility voltage is verified. • Output contactor is closed, bringing DC bus voltage to 760 V. • System verifies that communication with the fuel device has been established. • (Liquid fuel only) Liquid fuel drain opens to remove any fuel remaining in the recuperator from prior start attempts. 5.8. Liftoff In this state voltage and current are applied to the permanent magnet generator to provide torque for rotating the engine components as follows: • C30: Generator speeds up to 25,000 rpm. • C65: Generator speeds up to 20,000 rpm. 5.9. Light In this state air-fuel mixture combustion begins in the engine. The following events occur: • (Liquid fuel only) Liquid fuel drain closes for operation. • Intra A power is turned on to control fuel shut off device and solenoids which allow fuel flow into the system. • Fuel devices are turned on, including air-assist device for liquid fuel systems. • Power is applied to the igniter through the spark exciter solenoid. • Fuel shutoff and injector solenoids are enabled. • Fuel flow is increased with the igniter on until an increase in TET is detected. If this increase is not detected within 30 seconds for C30 or 15 seconds for C65, a FAIL TO LIGHT fault (6006) is declared. 5.10. Acceleration In this state the engine accelerates to the minimum idle speed before entering the Run state. The following events occur: • The spark exciter solenoid/igniter is turned off. • Fuel flow increases to maintain combustion while raising generator speed to 45,000 rpm. 410027 Rev G (April 2013) Page 26 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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