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Shutdown
Eaton Network Card-MS User’s Guide P-164000100—Rev 1
www.eaton.com/powerquality
76
Load Segments
Some UPSs are equipped with load segments, which are always dependent on the UPS’s master. Shutdown
of the master initiates a shutdown of the load segments (usually two load segments). Refer to the UPS user’s
guide for the location of the load segments. Figure 53 shows a graph of the shutdown sequence for the load
segments. The following notations are used to identify these receptacles:
Figure 53. Shutdown of Load Segments
Protection of a Server Connected to a Load Segment
NetWatch and NSMs are compatible with load segments. After connecting the server electrically to one of the
load segments, NetWatch and NSM must be informed of the load segment number to which it is connected.
Refer to NetWatch/NSM documentation. Go to www.eaton.com/powerquality to download the software.
Load Shedding or Sequential Shutdown
You can optimize backup time by shutting down non-priority equipment or sequencing the shutdown of several
devices.
Two shutdown criteria are possible:
l
Shutdown of receptacles after a set battery back-up time (After)
l
Shutdown of receptacles at a given battery discharge level (if battery capacity under)
If you specify values for both criteria, the first criterion reached initiates server shutdown.
Main Output
Main
Load Segment 1
1
Load Segment 2
2
S
hutdown Duration
Main Output
Utility
Failure
Start Shutdown
Load Segment 1
Start Shutdown
Main Output
Utility
Restore
Utility
Main Output
Load Segment 1
NetWatch/NSM 1 on Main Output
NetWatch/NSM 2 on Load Segment 1
NetWatch/NSM 3 on Main Output
S
hutdown Duration
Load
S
egment 1
S
hutdown
Duration 2
S
hutdown
Duration 1
S
hutdown
Duration 3
S
hutdown
After