Dual "facilities power distribution" installation
Dual "facilities power distribution" installation - PDU power
The 3931 is designed with a fully redundant PDU power system. Each computer has 2, 4, 6, or 8 line cords attached to 2, 4, 6, or 8 power input feeds which, in turn, power a fully redundant power sub-system within the computer. The system line cords should be connected to the installation site's distribution panels accordingly, to ensure system availability is optimized.
The minimum recommended redundant connection requires the line cords from odd
numbered PDU's (such as PDU-A1
and PDU-A3
), to be
attached to a customer distribution power panel(s) that is independent of the customer
distribution power panel(s) to which the line cords from even numbered PDU's (such as
PDU-A2
and PDU-A4
), are attached. This method of
connection can prevent a system outage from occurring, caused by the loss of a power distribution
panel or the tripping of an upstream breaker that is powering that distribution panel. Additional
redundancy, such as independent switchgear, feed transformers, or power substations, can further
improve the system's immunity to power outages.
The following figures show the recommended PDU power connections for 3931.
Example (incorrect and correct PDU power connections)
Dual "facilities power distribution" installation - BPA power
The 3931 is designed to support a fully redundant 2N BPA power system. Each computer has either 2 or 4 line cords attached to 2 or 4 power input feeds which, in turn, power a pair of fully redundant bulk power assemblies within the computer. The system line cords should be connected to the installation site's distribution panels accordingly, to ensure system availability is optimized.
The minimum recommended redundant connection requires the line cord pair in a given frame to attach to separate power distribution panels. This method of connection can prevent a system outage from occurring, caused by the loss of a power distribution panel or the tripping of an upstream breaker that is powering that distribution panel. Additional redundancy, such as independent switchgear, feed transformers, or power substations, can further improve the system's resistance to power outages.
The following figures show the recommended BPA power connections for 3931.
Example (incorrect and correct BPA power connections)