Specifications

Overview
40kW InfraStruXure PDU—Operation and Configuration 7
Rear view (interior)

The load test port allows a
UPS system to be load-tested to
ensure that the system will
operate according to
specifications if a power outage
occurs. (This is an optional
component.)

The Main Input switch
connects to Mains. The switch
accepts 400V input and
requires L1, L2, and L3 input
conductors for PDUs with a
transformer and L1, L2, L3, and
N input conductors for PDUs
without a transformer.

The PDU monitoring unit has several current and voltage monitoring boards that report to a
central board assembly located in the PDU monitoring unit. The PDU monitoring unit has one
10BaseT (Cat-5) connection to the Information Controller hub (or switch), four output relay
connections, four input contact connections, and one EPO input connection. For easier access
make these connections at the user connection plate located on the roof of the PDU.

These fuses protect the silicon-controlled rectifiers in the UPS bypass static switch. The fuses
are present only on PDUs without a transformer.

The output of the optional isolation input transformer feeds the input circuit breaker of the
maintenance bypass panel.
Note: The secondary side of the optional isolation input transformer should be provided with a
suitable separate connection to an earth electrode.

The UPS input and output cables connect the PDU to the UPS and are shipped coiled on the
floor of the PDU. The input cables consist of 5 wires: L1, L2, L3, N, and PE. The output cable
consist of 4 wires: L1, L2, L3, and N. Each wire is labeled and corresponds to a terminal on the
Symmetra PX UPS. During installation, the Field Service Engineer will connect the PDU to the
UPS.





