Page 11
PDUAC3U SERIES
OPERATING MANUAL
P O W E R I N G T E C H N O L O G Y
Manual No. pduac3u-3
pduac3u-man-rev3-0317.indd
Each output provides a single phase voltage of 120VAC, 208VAC or 230VAC
depending on the model. Models with 4 output breakers fitted use CB1-4, those
with 8 breakers use CB1-8 and those with 12 breakers use CB1-12.
The internal wiring of the PDU ensures that the phases are distributed as evenly
across the outputs as possible. Make ALL connections to each rectifier shelf from
a single barrier strip even if the system does not initially have a full compliment
of rectifiers. This will ensure proper load balancing across the input phases and
also allow rectifiers to be added at a later date without the need to install additional
cables.
11.4 Checking Connections.
Carefully check the input connections to the PDU and
output connections to the load before operating the panel. In particular pay attention
to the input wiring as described in section 11.2. Incorrect connections will not harm
the PDU but may cause serious harm to the load. Check to make sure that the safety
ground connections is made. Make sure that all connections are clean and secure
to minimize contact resistance.
11.5
UL Requirements.
The following should be adhered to when installing this PDU:
Elevated Operating Ambient
- If installed in a closed or multi-unit rack assembly,
the operating ambient temperature of the rack environment may be greater than
room ambient. Therefore, consideration should be given to installing this PDU in
an environment compatible with the maximum specified ambient temperature.
Reduced Air Flow
- Installation of this PDU in a rack should be such that the amount
of air flow required for safe operation of this PDU is not compromised.
Mechanical Loading
- Mounting of this PDU in the rack should be such that a
hazardous condition is not achieved due to uneven mechanical loading.
Circuit Overloading
- Consideration should be given to the connection of this
PDU to the supply circuit and the effect that overloading of the circuits might have
on overcurrent protection and supply wiring. Appropriate consideration of PDU
nameplate ratings should be used when addressing this concern.
Reliable Earthing
- Reliable earthing of this rack-mounted PDU should be
maintained. Particular attention should be given to supply connections other than
direct connections to the branch circuit (e.g. use of power strips).”
