UFC 3 -520-01
June 10, 2002
13-1.2.4 Research, development, and test facilities--for quality process control, fail-
safe shutdown, preservation of research and development test results, security, and
safety.
13-1.2.5 Liquid fueling and dispensing facilities--aircraft dispensing for support of
operational missions.
13-1.2.6 Other liquid fueling and dispensing facilities--when specifically determined by
the facility mission requirements.
13-1.2.7 Communications and navigational aids.
13-1.2.8 Airfield lighting.
13-1.2.9 Supply facilities--for direct tactical support, security, preservation of storage,
and safety.
13-1.2.10 Utilities and ground improvements--for initial start -up, control, and complete
operation of essential plants and systems. For fail-safe shutdown, safety, and security
of noncritical plants and systems.
13-1.3
Paragraph 13-3.2 provides a list of applications and facilities that are
authorized for the use of standby generators.
13-1.4
Backup power takes several forms. The following definitions are important to
consider when developing facility backup power criteria:
13-1.4.1 Emergency Power System. An emergency power system is an independent
reserve source of electric energy. Upon failure or outage of the normal or primary
power source, the system automatically provides reliable electric power within a
specified time. The electric power is provided to critical devices and equipment whose
failure to operate satisfactorily would jeopardize the health and safety of personnel, or
result in damage to property, or jeopardize a critical mission. The emergency power
system is usually intended to operate for a period of several hours to a few days.
13-1.4.2 Standby Power System. An independent reserve source of electric energy
which, upon failure or outage of the normal source, provides electric power of
acceptable quality and quantity so that the user's facilities can continue satisfactory
operation. The standby system is usually intended to operate for periods of a few days
to several months, and might augment the primary power source under mobilization
conditions.
13-1.4.3 UPS. A UPS is designed to provide continuous power and to prevent the
occurrence of transients on the power service to loads which cannot tolerate
interruptions and/or transients due to sensitivity or critical operational requirements.
13-2
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