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Specifications

ManualsBrandsBull ManualsComputer equipmentNovaScale 3005 Series
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4-1
Power Supply
Chapter 4. Power Supply
This chapter explains power supply requirements for Bull NovaScale Servers. It includes the
following topics:
• Power Supply, on page 4-1
• Cabling Requirements, on page 4-2
• Grounding Circuit, on page 4-5
• Neutral Power System, on page 4-6
• Non-Computing Power Supply, on page 4-8
DANGER
A power supply compliant with Standard NFC 15.100, dated May 1991, is mandatory for
the servers.
Power Supply
Inrush current on connecting the server to the main AC power supply may be significant. The
Bull NovaScale Server CSS module is equipped with a switch-mode power supply that
absorbs sinusoidal currents.
Each PDU is equipped with a switch-mode power supply that absorbs non-sinusoidal currents.
To ensure that interferences or faults generated by other systems and devices do not affect
server operation, the CSS module and the PDU/UPS must be powered through an AC
protection.
Electric and data cables must be laid in bulk on the primary slab, in the raised floor plenum.
If cableways are required, electricity distribution cables must be separated from data
transmission cables (separation of high and low currents) by at least 30 cm.
Prerequisites:
• Provision of the power supply interface and the corresponding electrical installation in
compliance with specifications.
• Provision and installation of the electric power supply panel (and required protections).
• Provision of power supply cables from the electricity distribution panel up to the hardware
connection point.
• Grounded plug sockets for the connection of the system to the power supply.
• Provision and installation of an emergency shutdown system (lock system) and of a power
supply cut-off device at general Data Processing Center circuit breaker level.
• Power factor requirement: > 90%.
Warning:
The installation of an "on-line" Uninterruptible Power Supply (UPS) is strongly recommended
to ensure continuity of service and to protect the system in the event of a mains failure.
The UPS may be installed in the rack, in the Computer Room or in an ancillary room.