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|  DOE-STD-3003-2000
TING for a minimum of 5 minutes.
and duration of the load) of the unit, the type
The HOT RESTART test may be
of power required by the load (frequency,
performed independently of the
voltage), the system configuration
endurance and load test provided
(redundancy, transfer features), protective
the EG is at full temperature.
features, limitations of available ac power,
limitations of available dc sources, short-
f.
Where the system accommodates
circuit capability, required controls,
parallel operation of the EG with
instrumentation, and alarms. Refer to
the GRID system for the purpose
ANSI/IEEE Std 944 and DOE-SPEC-3021 for
of live bus transfer of loads or for
guidance and criteria for these and other
testing, the ability to synchronize
factors to be considered in developing the
and transfer between these
bases of a UPS system. ANSI/IEEE Std 944
sources should be demonstrated.
and DOE-SPEC-3021 shall be used to
This is unnecessary if done during
develop the bases and requirements of UPS
periodic tests.
systems with respect to specification of
service conditions (environmental),
g.
For systems where the bus
specification of UPS system requirements,
undervoltage relay trips the GRID
and specification of design test requirements.
source breaker, the capability to
Environmental conditions exceeding the
restore the GRID circuit to the EG
values in ANSI/IEEE Std 944 should be
bus should be demonstrated.
identified and equipment specifically qualified
to these different conditions. Refer to
5.2.3.6 Test failure. When recording
guidance and criteria in NFPA 111 for the
development of bases and specifications for
test results, a failure should be recorded if
transfer devices to be used with UPS
the EG fails to start, accelerate, reach
designs. DOE-SPEC-3021 should be used to
nominal voltage and frequency, accept the
develop and document the specification for
rated load within and for the time required, or
new UPS installations.
otherwise fails to satisfy the specified
acceptance criteria. Test success and failure
5.3.2 Maintenance and repair of UPS.
data should be used to determine whether
performance (reliability) goals are being met.
The maintenance program should take into
Refer to IEEE Std 762, NRC Reg. Guide 1.9,
consideration the type of service to which the
and NRC Reg. Guide 1.160 for guidelines.
equipment is subjected (duty cycle,
chemicals, dust, heat), manufacturer's
5.3 UPS system requirements. UPSs
recommendations, and trending.
are used to supply an uninterrupted source of
5.3.2.1 Qualification of maintenance
power to important instrumentation and
control systems for loss-of-normal-power
personnel for UPSs. Specific qualification for
conditions. They are also used to provide
UPS systems maintenance personnel should
continuous, quality power for systems
include the following:
sensitive to disturbances occurring in an
electrical power distribution system caused
a.
Fundamentals of electrical and
by switching, faults, or power transfer. UPS
electronic design of UPSs
designs include various combinations of
rectifier/charger, battery transfer and bypass
b.
Testing and maintenance
switches, and an inverter. Rotary UPSs are
practices for UPS systems
not covered by this Standard.
c.
Safety precautions for UPS
5.3.1 UPS capabilities. The
systems
specification of requirements for the UPS
shall include the sizing (based on the load
16
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