Capstone Turbine Corporation
Model C65 Hybrid UPS User’s Manual
Page
40 of 66
400027 Rev A (July 2010)
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System Output Submenu
System Data 1/4
MP5 UPS OK 1/10
66.1 kW In
65.0 kW Out
The second line shows whether it is a Single (SNGL) unit or a MultiPac (MP) unit, the
MicroTurbine number, the current system state, and the system fault status as OK or FLT.
This submenu also gives the input power from the Utility grid source as “kW In” on the
third line and the total output of the system in kilowatts “kW Out” on the fourth line. Note
that if the turbine is generating more power than required by the load, the kW In will be
negative. A negative value for kW In indicates net export from the Hybrid UPS system to
the grid connection point for use by other loads in the facility, and does not necessarily
mean export of power to the external utility grid.
The system state messages are abbreviations of the actual system states, as summarized
in Table 4. Only three system state messages match the desired operating modes of
Standby (STB), UPS Normal Mode (UPS), and High Efficiency Mode (EFF). The
remaining messages represent transition states that should not persist in a fully
functioning system.
Note that all Hybrid UPS systems in a MultiPac must be commanded to the same
operating mode; that is ether Standby, UPS Normal, or High Efficiency. However, when
the UPS Controller is dispatching individual Hybrid UPS units using its High Efficiency
control logic, the displayed system state will be UPS for units that have not had their
engines enabled to start, and EFF for units that have received an engine start command.
Table 4. Hybrid UPS System State Messages and Description
Hybrid UPS
System State
Microturbine
Display
Description
STAND BY
STB
System is out of service
POWER UP
PWUP
System is in power-up state
BATT RECHARGE
BATR
Engine recharging external batteries
BATT ENABLE
BATE
System is ready to output power to
critical load from external batteries
UTILITY ENABLE
UTEN
System is ready to output power to
critical load from utility source
UPS NORMAL
UPS
System operating in normal UPS mode
HIGH EFFICIENCY
EFF
System operating in high efficiency mode
LOAD RECOVERY
LRCV
System recovering from load fault
EMERGENCY
EMER
System is providing power to critical
loads in absence of utility source
SW DOWNLOAD
SWLD
System is downloading software
SHUTDOWN
SDWN
System is waiting for correct engine state
to allow transition to standby state
