modular cabinet. 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 see the
HPE 3 Phase UPS User Guide
for connectors and wiring
for the HPE R12000/3 UPS. This guide is on the Hewlett Packard Enterprise website at:
http://www.hpe.com/support/UPS_3_Phase_Manuals
Electrical Power and Grounding Quality
Proper design and installation of a power distribution system for an NS2100 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
“AC Input Power for Modular Cabinets” (page 58)
Power Quality
This equipment is designed to operate reliably over a wide range of voltages and frequencies,
described in
“Enclosure AC Input” (page 60)
. However, damage can occur if these ranges are
exceeded. Severe electrical disturbances can exceed the design specifications of the equipment.
Common sources of such disturbances are:
•
Fluctuations occurring within the facility’s distribution system
•
Utility service low-voltage conditions (such as sags or brownouts)
•
Wide and rapid variations in input voltage levels
•
Wide and rapid variations in input power frequency
•
Electrical storms
•
Large inductive sources (such as motors and welders)
•
Faults in the distribution system wiring (such as loose connections)
Computer systems can be protected from the sources of many of these electrical disturbances
by using:
•
A dedicated power distribution system
•
Power conditioning equipment
•
Lightning arresters on power cables to protect equipment against electrical storms
For steps to take to ensure proper power for the servers, consult with your Hewlett Packard
Enterprise site preparation specialist or power engineer.
Grounding Systems
The site building must provide a power distribution safety ground/protective earth for each AC
service entrance to all NonStop server equipment. This safety grounding system must comply
with local codes and any other applicable regulations for the installation locale.
For proper grounding/protective earth connection, consult with your Hewlett Packard Enterprise
site preparation specialist or power engineer.
Power Consumption
In an NS2100 system, the power consumption and inrush currents per connection can vary
because of the unique combination of enclosures housed in the modular cabinet. Thus, the total
power consumption for the hardware installed in the cabinet should be calculated as described
in
“Enclosure Power Loads” (page 60)
Electrical Power and Grounding Quality
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