HP Integrity NonStop i NS2300, Руководство по планированию

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3 Site Preparation Guidelines for NS2300 Systems
This chapter provides guidelines for preparing a site for an NS2300 system.
Rack Power and I/O Cable Entry
Depending on the rack order and the routing of the AC power feeds at the site, AC power cords
for the PDUs exit either:
•
Top: Power and I/O cables are routed from above the rack.
•
Bottom: Power and I/O cables are routed from below the rack.
Emergency Power-Off (EPO)
EPO Switches
EPO switches are required by local codes or other applicable regulations when computer
equipment contains batteries capable of supplying more than 750 volt-amperes (VA) for more
that five minutes. Systems that have these batteries also have internal EPO hardware for
connection to a site EPO switch or relay. In an emergency, activating the EPO switch or relay
removes power from all electrical equipment in the computer room (except that used for lighting
and fire-related sensors and alarms).
EPO Requirement for NS2300 Systems
NS2300 systems without an optional UPS (such as an R12000/3 and R5000 UPS) installed in
the modular rack do not contain batteries capable of supplying more than 750 volt-amperes (VA)
for more that five minutes, so they do not require connection to a site EPO switch.
EPO Requirement for R5000 UPS
The rack-mounted R5000 UPS is supported for a single-phase power configuration. Each UPS
contains batteries, has an EPO circuit, and can be optionally installed in a rack. For site EPO
switches or relays, consult your Hewlett Packard Enterprise site preparation specialist or electrical
engineer regarding requirements.
If an EPO switch or relay connector is required for your site, contact your Hewlett Packard
Enterprise representative or refer to the appropriate manual in
“UPS and ERM (Optional)” (page
18) .
EPO Requirement for R12000/3 UPS
The rack-mounted R12000/3, UPS is supported for a three-phase power configuration. This UPS
contains batteries, has a remote EPO (REPO) port, and can be optionally installed in a modular
rack. For site EPO switches or relays, consult your Hewlett Packard Enterprise site preparation
specialist or electrical engineer regarding requirements.
If an EPO switch or relay connector is required for your site, contact your Hewlett Packard
Enterprise representative or refer to the appropriate manual in
“UPS and ERM (Optional)” (page
18) .
Electrical Power and Grounding Quality
Proper design and installation of a power distribution system for a NS2300 system requires
specialized skills, knowledge, and understanding of appropriate electrical codes and the limitations
of the power systems for computer and data processing equipment. For power and grounding
specifications, see
“Power specifications” (page 44) .
26 Site Preparation Guidelines for NS2300 Systems