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CHAPTER 7: Alarm Configuration
105
• Subject: This parameter is used to dene the text that will appear in the
"Subject" eld for all email notication messages generated by the alarm.
(Defaults = "Alarm: Over Current (Initial)" or "Alarm: Over
Current (Critical)")
• Load Shedding: Provides access to a submenu which is used to congure
and enable the Load Shedding feature for the Over Current Alarm. When
Load Shedding is enabled and properly congured, the Outlet Managed PDU
will switch user-selected plugs On or Off whenever the current load exceeds
the Alarm Set Threshold value. If the Auto Recovery feature is enabled, the
Outlet Managed PDU can also return these user-selected plugs to their prior
status when current load falls below the Alarm Clear Threshold value. For
more information on the Load Shedding Feature and Auto Recovery, please
refer to Section 7.1.1.
7.1.1. Over Current Alarms - Load Shedding and Auto Recovery
The Load Shedding feature is used to switch specic, user-dened, non-essential
plugs On or Off whenever current load exceeds the Alarm Set Threshold value. This
allows the Outlet Managed PDU to automatically shut Off plugs in order to reduce
current load when the load approaches user-dened critical levels. When the Auto
Recovery feature is enabled, the Outlet Managed PDU can also automatically "undo"
the effects of the Load Shedding feature when current load again falls to a user-
dened non-critical level.
The Outlet Managed PDU also allows you to dene separate Load Shedding/
Recovery actions for an Over Current Branch Alarm and an Over Current Line
Alarm. For example, if the Line Alarm is triggered, Load Shedding can switch Off
Plugs A1 and B1, yet when the Branch "A" Alarm is triggered, the Outlet Managed
PDU can switch Off Plugs A1 and A2.
Together, the Load Shedding and Auto Recovery features allow the Outlet Managed
PDU to shut off power to non-essential devices when the current load is too high,
and then switch those same non-essential devices back On again when the load falls
to an acceptable level.
Note:
The Load Shedding Configuration Menus for all Over Current
Alarms offer essentially the same set of parameters, but parameters
defined for each alarm are separate and unique. For example,
parameters defined for Over Current (Initial) Alarm Load Shedding
will not be applied to Over Current (Critical) Alarm Load Shedding
and vice versa.