Capstone Turbine Corporation
Model C65 Hybrid UPS User’s Manual
Page
32 of 66
400027 Rev A (July 2010)
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.
Orderly Shutdown Alarm
CAUTION
The Orderly 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 appropriate to the potential loss of power to the critical loads.
Data center and telecommunications equipment can be shut down in an orderly manner that
preserves information and/or transfers operation to other equipment. Typically this requires
several minutes to complete. To help mitigate loss of data or missed opportunity to transfer
operation to another piece of equipment, the UPS Controller can issue an Orderly Shutdown
alarm that signals conditions that may result in power system shutdown in five minutes. For
example, this Orderly Shutdown alarm may be signaled whenever:
•
Battery State of Charge is 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.
Imminent Shutdown Alarm
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.
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.
