NonStop NS1000 Planning Guide (H06.07+)

Installation Facility Guidelines
HP Integrity NonStop NS1000 Planning Guide—542527-003
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Grounding Systems
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Electrical storms
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Large inductive sources (such as motors and welders)
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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:
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A dedicated power distribution system
•
Power conditioning equipment
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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 HP 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 HP site preparation
specialist or power engineer.
Power Consumption
In an Integrity NonStop NS1000 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 on page 3-6.
Uninterruptible Power Supply (UPS)
Modular cabinets do not have built-in batteries to provide power during power failures.
To support system operation through a power failure, Integrity NonStop NS1000
servers require either an optional UPS (such as an HP model R5500 XR UPS)
installed in each modular cabinet or a site UPS to support system operation through a
power failure. This system operation support can include a planned orderly shutdown
at a predetermined time in the event of an extended power failure. A timely and orderly
shutdown prevents an uncontrolled and asymmetric shutdown of the system resources
from depleted UPS batteries. The HP model R5500 XR UPS supports the OSM Power
Fail Support function that allows you to set a ride-through time. If AC power is not
restored before the specified ride-through time period expires, OSM initiates an orderly
system shutdown. For additional information, see AC Power Monitoring on page B-17.
You can order an optional HP R5500 XR UPS for each modular cabinet to supply
power to the enclosures within that cabinet. Up to two Extended runtime modules
(ERMs) can be included with the R5500 XR UPS to extend the power back-up time. If