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Capstone Turbine Corporation Model C65 Hybrid UPS User’s Manual An example of a condition that can initiate an Orderly Shutdown alarm is an insufficient charge in the external batteries (i.e., Battery State of Charge less than five minutes). Even if the Hybrid UPS system is operating in UPS Mode or High Efficiency Mode, insufficient external energy storage could result in the critical loads being dropped should a utility fault occur. Note that the actions taken as a result of such an alarm may be different, depending on whether the turbine generators are running or not, and whether the utility source is present or not. Refer to the UPS Controller User Manual (400028) for a description of how your system is set up. 3.12.2. Imminent Shutdown Alarm There may be sufficient notice of potential loss of load power output for the UPS Controller to issue an Imminent Shutdown alarm. Typical external action taken in response to this alarm would be automatic transfer of critical loads to the utility source, if it is available. For example, this Imminent Shutdown alarm may be signaled whenever: Load Output is Severely Overloaded – if the system is in Emergency Mode and goes into a severe overload condition, there may be only seconds of time before the integral protective functions of the Hybrid UPS systems declare a fault and stop load output power flow. Inverter Reserve is Lost – if some Hybrid UPS units are taken out of service for any reason and/or there is a moderate overload condition on the critical load output, the UPS Controller will signal this loss of capacity. The inverter reserve can be preset to represent one or more Hybrid UPS system's output capability. In this case, the external actions taken may include non-critical load shedding or switching critical loads to an alternate source temporarily. Refer to the UPS Controller User Manual (400028) for a description of how your system is set up. 3.12.3. Fault Data Registers The UPS Controller monitors the fault condition of each Hybrid UPS system it is connected to, and periodically writes this fault status into multiple data registers that can be read externally using Modbus TCP/IP. Some of this fault data is used within the UPS Controller to drive the specific alarms noted above. Other fault data may be less critical to continued operation, but should be recognized by facility personnel who can take appropriate action. 400027 Rev B (August 2013) Page 37 of 71 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. CAUTION: The Imminent Shutdown alarm does not guarantee that the Hybrid UPS system will continue producing power for any specific period of time in order to avoid potential business losses or damage to critical load equipment. Assure that the external actions taken in the presence of this alarm are done quickly to mitigate loss of power to the critical loads.PDF Image | Capstone MicroTurbine Model C65 Hybrid UPS User's Manual
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