Stand Alone Operation – Capstone Model C30 and C60

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Stand Alone Operation – Capstone Model C30 and C60 ( stand-alone-operation-–-capstone-model-c30-and-c60 )

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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Technical Reference: Stand Alone Operation – Capstone Model C30 and C60 Battery Charge Management After a Start command, the system leaves the Standby state to power up MicroTurbine components to operational levels before transitioning to the Run state, where battery charging may again occur. Once started, the MicroTurbine will not advance to the Load state until the battery state-of-charge is at least 60 percent (only occurs under conditions of poor maintenance, multiple subsequent fault cycles or end of battery life). After this state is achieved, the output contactor is closed and the MicroTurbine begins producing power for connected loads. The MicroTurbine system is designed to keep the battery 80 percent charged during Load state operation to allow for sourcing and sinking of power transients, and to maintain an operating state-of-charge. If a user-initiated STOP is performed, the system immediately enters the recharge state, bringing the battery to over 90 percent state-of-charge before entering the Cooldown state. Normally, the system will take approximately twenty (20) minutes to recharge the battery following a STOP command. On transition to Cooldown, fuel is commanded off and the MicroTurbine spins down, but remains rotating to provide airflow over engine components for cooling. After Cooldown is complete, the MicroTurbine enters a short Shutdown state before finally entering the Standby state. No battery charging is performed while in Standby. If the system is not commanded ON during a user-selectable time period, the system will automatically enters a minimum battery drain state called Sleep state. This time period is called the Auto Sleep Time. Putting the battery in Sleep state can preserve battery charge for up to six months (life is based on ambient temperatures). To adjust the Auto Sleep Time period, enter the user password, and navigate to the Battery Management > Auto Sleep Time submenu. Sleep time is designed so that an inactive MicroTurbine will remain in the Standby state, before automatically entering the Sleep state, to sustain minimal power draw and maintain battery life. The timer is adjustable up to 24 hours but should be set to a minimum level to preserve battery life. In some ambient temperatures, the battery can drain in much less than 24 hours. Auto sleep time may be configured using the display panel or CRMS: • CRMS: select: Settings > Battery Management, enter the sleep time in hours. • Display panel: Navigate as follows - Battery Management > Auto Sleep Time, then enter the value in hours. Auto Sleep Time Configures time that MicroTurbine remains 0.1 – 24.0 hrs 1.0 in Standby before entering Sleep state If the MicroTurbine is in Sleep or Standby state, there is a parasitic load that will greatly reduce the allowable storage time. In addition, battery packs stored for extended periods will become discharged and will require periodic charging. However, if this interval is excessive, the battery pack may have permanently reduced capacity and could require replacement. The MicroTurbine Standard Maintenance Schedule Work Instruction (440000) provides battery recharge intervals for Sleep or Standby states, as well as replacement intervals. The Battery Performance Technical Reference (410044) provides detailed data on life expectancy. 410028-001 Rev. C (July 2004) Page 16 of 22 This information is proprietary to Capstone Turbine Corporation. Neither this document nor the information contained herein shall be copied, disclosed to others, or used for any purposes other than the specific purpose for which this document was delivered. Capstone reserves the right to change or modify without notice, the design, the product specifications, and/or the contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. Battery Management Parameter Description Parameter Value Default

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