LEGRAND PDU - Initialization Delay Use Cases; Inrush Current and Inrush Guard Delay; Z Coordinate Format

June 2018
Legrand PDU User Guide 97
Additional
option
Function
PDU defined
(xxx)
Follows the global outlet state setting, which is set on
PDU (on page 94).
The value xxx in parentheses
is the
currently-selected global option - on, off, or last
known.
Initialization Delay Use Cases
Apply the initialization delay in either of the following scenarios.
 When power may not initially be stable after being restored
 When UPS batteries may be charging
Tip: When there are a large number of outlets, set the value to a smaller number to avoid a long wait before all
outlets are available.
Inrush Current and Inrush Guard Delay
 Inrush current:
When electrical devices are turned on, they can initially draw a very large current known as inrush current.
Inrush current typically lasts for 20-40 milliseconds.
 Inrush guard delay:
The inrush guard delay feature helps prevent a circuit breaker trip due to the combined inrush current of
many devices turned on at the same time.
For example, if the inrush guard delay is set to 100 milliseconds and two or more outlets are turned on at the
same time, the PDU will sequentially turn the outlets on with a 100 millisecond delay occurring between each
one.
Z Coordinate Format
Z coordinates refer to vertical locations of Raritan's environmental sensor packages. You can use either the
number of rack units or a descriptive text to describe Z coordinates.
For a Z coordinate example, see Sensor/Actuator Location Example (on page 129).
 To configure
Z coordinates:
1. Determine the Z coordinate format on PDU (on page 94). Available Z coordinate formats include:
Format Description
Rack Units The height of the Z coordinate is measured in
standard rack units.
When this is selected, you can type a numeric
value in the rack unit to describe the Z coordinate
of any environmental sensors or actuators.
Free-Form Any alphanumeric string can be used for
specifying the Z coordinate. The value comprises
0 to 24 characters.
2. Configure Z coordinates on the Individual Sensor/Actuator Pages (on page 125).