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To add a 3-pole subfeed breaker circuit:

• Run the Configuration program (see 5.5.1 - Starting the Configuration Program).
• If needed, select the panel and breaker view with the new breaker:

• In the Select Panel box, click on Panel A or Panel B.
• In the Select View box, choose Panel Breakers if the new breaker is installed inside the pan-

elboard or Auxiliary Breakers if located outside the panelboard.

• Right-click on the new breaker position in the left pane. The selected breaker has a yellow outline.
• In the pop-up menu, click on Add Subfeed.
• In the Add Subfeed window:

• Click on the subfeed—for example, Subfeed #1 or 

Subfeed #2—in the Select Subfeed box.

• In the Select Size box, choose the rating of the new breaker: 100 Amp, 225 Amp or 400 Amp.
• Click on the Add Subfeed button to return to the main Configuration window.

• In the Breaker Properties box of the Configuration window, change the subfeed breaker’s name, 

parameters and alarm setpoints as needed (see 5.5.10 - Edit the Breaker Properties).

• When finished, click Install to Unit to upload the changes to the Liebert LDM.

NOTE
Check to make sure the location for the new breaker does NOT have a breaker assigned. If it 

does, first remove that breaker (see 5.5.14 - Delete a Breaker), then return to this procedure.
An error message appears if you attempt to add a breaker to an already assigned position.
• If NOT assigned, a subfeed breaker position is shown with three Liebert logos.
• An assigned subfeed breaker position appears as a picture of a 3-pole breaker.

NOTE
The number of available subfeeds is determined by the 

NOTE
The configuration changes will not be stored in the Liebert LDM until the Install to Unit