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C120-H007-05EN 31
3.5 Power Supply Facilities
3.5.2 Power supply facilities for air conditioners
Air conditioners or air conditioning control panels must be located for correct and
efficient operation of the computer room.
3.5.3 Facility control panels
Facility control panels, which are used to run facilities in auto mode or shut them off
immediately in an emergency, must be located to allow easy access.
Separate transformers Low-voltage transformers used
when:
• The supply voltage available to
the building and the voltage
required by the server system
differ.
• A voltage regulator, such as a
UPS, is installed in a separate
building or at a remote location.
• Power is fed from a high-
voltage transformer that is
shared by other facilities,
without using a voltage
regulator.
Separator transformers, when
used, are typically installed in a
computer room.
Step-down transformers
(200 V to 100 V)
Transforms 200 V, from a high-
voltage transformer and voltage
regulator, to suit certain
equipment which operates
at 100 V.
Step-down transformers, when
used, are typically installed in a
computer room.
Distribution panels Distributes power to server
system.
Installed in a computer room.
Grounding facilities Used to ground server system. The grounding cable is led to the
distribution panel for distribution.
Table 3.1 Kinds, uses, and locations of power supply facilities (2/2)
Power supply Use Location