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Overview
80kW InfraStruXure PDU—Operation and Configuration 9
Rear view (interior)
42-position circuit breaker
panel—Each PDU has a
circuit breaker panel with 42
pole positions. Each pole
provides power at 120 volts
L-N or 208 volts L-L. The
amperage each position
provides depends on the size
of the circuit breaker used.
Panel current sensors—
Wires that feed the
distribution panel pass
through these current sensors,
providing data to the PDU
monitoring unit.
PDU monitoring unit—The PDU monitoring unit receives signals from several current and
voltage monitoring boards that report to a central board assembly located in the PDU
monitoring unit. The monitoring unit has one 10Base-T (Cat-5) connection to the Information
Controller Hub (or switch), four (4) relay output connections, four (4) input contact
connections, and one (1) EPO input connection. Make these connections at the user connection
plate located on the roof of the PDU. See “PDU monitoring unit” on page 10 for a more
detailed description.
Input transformer—The delta-wye transformer installed in your PDU is based on your input
voltage (208V, 480V, or 600V input). The output of the transformer feeds the input circuit
breaker of the maintenance bypass panel. (APC also offers a 208V PDU without a transformer.)
Load test ports—The load test ports are an available option on the PDU. The load test bank
connector allows a UPS system to be load-tested to ensure that the system will operate
according to specifications if a power outage occurs.