6 InfraStruXure Power Generation System
How the InfraStruXure Power Generation
System Operates
Operation of the ATS during a utility failure when automatic operation is enabled
Your data center equipment
is typically powered by the
utility [Source 1] (), while
the generator [Source 2]
remains off. When the level
of incoming utility power
falls below a specified
threshold (), the ATS
signals the generator to start
(). After the generator
starts and attains the
necessary power to support
the load, the ATS performs
an open transfer to the
generator ().
The generator then continues
to support your data center
equipment () until an
acceptable flow of utility
power is restored (). The
utility power must remain
stable for a specified length of time (Line Stable setting) and the generator must run for at least the
duration of its minimum run-time (Min on Gen setting) before the load will be retransferred to the
utility (). The retransfer to the utility can be either open or closed. Following retransfer, the
generator cools down () and eventually stops.
For more information.
See page 33 for a description of how the ATS determines the line quality is bad.
See page 7 for a detailed description of the generator start sequence.
See page 8 for detailed descriptions of open and closed transfers.
See page 7 for a detailed description of generator cool-down.
See page 35 for information about the Line Stable setting.
See page 35 for information about the Min on Gen setting.
Load
Powered by
Utility.
Generator
is Off
Generator
Cool-Down Generator
Start
Sequence
Load
Powered
by Generator
Utility Failure
Generator Started
Open Transfer
to Generator
Utility
Restored
Retransfer to
Utility
(Open or Closed)
Generator Started
Generator Stopped