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Legrand PDU User Guide 105
To select ALL outlets, select the topmost checkbox in the header row.
3. To turn non-critical outlets into critical ones, deselect their checkboxes.
To deselect ALL outlets, deselect the topmost checkbox in the header row.
4. Click
Save.
Tip: You can also set up non-critical outlet setting by configuring outlets one by one. See
Individual Outlet
Pages
(on page 107).
Load Shedding Mode
When a UPS supplying power to Legrand PDU switches into battery backup operation, it may be desirable to
switch off non-critical outlets to conserve UPS battery life. This feature is known as load shedding.
Outlets that are turned off when load shedding is activated are called non-critical outlets. Outlets that are not
affected by load shedding are called critical outlets. By default, all outlets are critical. To set non-critical ones,
see
Setting Non-Critical Outlets
(on page 104).
When load shedding is activated, the Legrand PDU turns off all non-critical outlets. When load shedding is
deactivated, the Legrand PDU turns back on all non-critical outlets that were ON before entering the load
shedding mode.
Exception: If you once manually perform switch-off operation on any non-critical outlets during the load
shedding mode, those outlets will NOT be turned back on when exiting the load shedding mode.
Activation of load shedding can be accomplished using the web interface, SNMP or CLI, or triggered by the
contact closure sensors.
Tip: It is better to check non-critical outlets prior to manually entering the load shedding mode. The
non-critical information can be retrieved from the Outlets page. See
Outlets
(on page 100) or
Available
Data of the Outlets Overview Page
(on page 103).
You must have the following two permissions to perform the load shedding commands.
'Change Pdu, Inlet, Outlet & Overcurrent Protector Configuration'
'Switch Outlet' permission for all
non-critical
outlets
To enter the load shedding mode:
1. On the Outlets page, click
> Activate Load Shedding.
Note: In case Legrand PDU prevents you from performing this command, check your permissions,
especially whether you have the Switch Outlet permission for ALL non-critical outlets.
2. Click Activate on the confirmation message.
In the load shedding mode:
You CANNOT power on any "non-critical" outlets.
