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Basic System Operation Overview There are three ways for the user to communicate with the microturbine: • Display panel • User interface port • Maintenance interface port Also some basic communications can be accomplished by making or breaking contact between pairs of terminals on the printed circuit board located in the communications bay found on the rear of the system. The user may communicate directly through the display panel mounted on the microturbine or through a personal computer connected to the user interface port (UIP). The PC may be connected to the UIP either directly (RS-232 Dsub9 null modem cable) or via phone line and optional modem. Communication is then possible using Capstone’s optional Capstone Remote Monitoring Software program on the PC, or other program using Capstone’s open communication protocol. Start-up The microturbine start up process includes motoring, ignition, warm up, and acceleration to full load. The start-up process from a cold start to full load requires approximately two minutes or less with new open nozzle engines. Start up can be commanded from the display panel or via remote means through the use of the user interface port or the maintenance interface port using the Capstone Remote Monitoring System. Shutdown After the command is entered for a system shutdown, power output is automatically terminated, followed by a period during which the microturbine is motored at nominal speed to cool the various components. The overall cooldown period is approximately ten minutes, but is affected by operating temperature at the time of shutdown. Approximately six minutes into the cooldown period, a restart may be initiated. If the battery requires recharging (after a stop command is issued), the microturbine will remain at 45,000 rpm to recharge the battery up to 90 to 95% prior to stopping completely. The battery normally requires as much as 20 minutes to recharge following an Off Command. 1. If an optional emergency stop (E-Stop) switch is installed, it may be initiated locally by the opera- tor. The following typical actions occur during an E-Stop: 1) Power export ceases 2. The output contactor is opened 3. The gas fuel solenoid valve is closed; 4. The compressor bypass valve opens; 5. Internal power is shut down, and 6. The rotor coasts to a stop. Emergency stops should only be used for emergency conditions and should NEVER be used for routine shut-downs. Emergency stops increase stress on the system components and will result in reduced service life of the microturbine. Routine Operation Most microturbine applications require no regular interaction with an operator during normal operation. Built-in dispatch features include peak shaving with local or remote control, external switching control, programmable scheduling, automatic restarting and automatic reloading. Load following may be accomplished in grid connect applications through the use of an external power meter (not included). Routine Operating Data Routine operating data is not archived in the digital power controller (DPC). The display panel, the user communications port, and the maintenance communications port may be used to recover current values of the following routine operating data: • Power output (kW) • Turbine speed (RPM) • Turbine exit temperature (TET) (degrees C) • Phase voltages, currents, and power Basic System Operation 511715-002 7 System OperationPDF Image | CAPSTONE MICROTURBINE MODEL 330 SYSTEM MANUAL
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