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CHAPTER 4 Capstone OPERATING MODES Soft Start Functionality Normally, the C200 provides the user-defined voltage and frequency as soon as the main output contactor is closed. However, the C200 microturbine may also be configured to begin exporting power at less than nominal voltage and frequency, and then linearly ramp to nominal values over a selected time period using the Soft Start functionality. Both voltage and frequency can be adjusted for this initial soft start function using CRMS software. Soft Start Voltage The Soft Start Voltage (0 to 480 V) setting is typically used to enable the microturbine to start a motor (or other loads), which cannot handle full load current immediately. This parameter differs from the Operating Voltage setting (150 to 480 V), which represents the load voltage at normal operating conditions. When the output contactor closes, the system will provide demanded current at this starting voltage and immediately begin increasing the voltage at the configured rate, up to the nominal voltage. The Start voltage can be adjusted from 0 to the normal voltage setting. Ramp Rate Volts per Second establishes the rate of voltage increase. When the output contactor closes, the system will provide demanded current at the voltage established above and immediately begin increasing the voltage at this rate. The Ramp rate can be set from 0 to 6,000 Vrms per second Soft Start Frequency Soft Start Frequency establishes the starting frequency. When the main output contactor closes, the system will provide demanded current at this starting frequency and immediately begin increasing the frequency up to the nominal frequency. The Start frequency can be adjusted from 0 to the normal frequency setting. Ramp Rate Hertz per Second establishes the rate of frequency increase. When the output contactor closes, the system will provide demanded current at the starting frequency and immediately begin increasing the output frequency at this rate. The Ramp rate can be set from 0 to 2,000 Hz per second. Battery Overview There are actually two sets of batteries that are a part of any Stand Alone microturbine system: the main batteries that provide power for starting the engine and to stabilize power output during load transients, and a small 12 VDC battery in the User Connection Bay (UCB) to provide energy to wake- up and engage the main battery system is engaged. Additional details on the main battery system are included in Chapter 5: Battery Management. Main Battery Isolation Switch A battery isolation switch to disable the microturbine for service or transport is located behind the lower kick panel on the C200 package. The switches on the two main battery packs must be set to ON for system operation. Refer to the C200 Users Manual (400008) for details. 410066 Rev C (June 2009) 4-5 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 | CAPSTONE C200 MICROTURBINE TECHNICAL REFERENCE
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