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|  DOE-STD-3003-2000
restore the active materials in the cell,
3.16 Standby conditions. Normal
bringing the cell FLOAT VOLTAGE and the
equilibrium status of an EG ready to receive
specific gravity of the individual cells back to
a start signal, either cold start or the
"equal" values.
conditions maintained by a keep-warm and
continuous lubrication system.
3.8 Float voltage. A continuous voltage
3.17 Stationary Battery. A system
supplying a low current from a battery
charger applied to a battery in the standby
consisting of a group of battery cells
mode to make up for internal losses and
(connected in series, parallel, or combination)
maintain the battery in a fully charged state.
normally operated in parallel with a
charger(s) and a load.
3.9 Grid. Offsite and/or onsite
3.18 Synchronization. Bringing one ac
interconnected electrical power distribution
system.
power source of the same nominal frequency
as another into the same frequency and
3.10 Hot restart. Restart of an EG from
phase angle of the other in order to avoid
excessive current flow when paralleling two
its continuous duty equilibrium temperature.
ac sources.
3.11 Isochronous mode. Mode of
3.19 Uninterruptible power supply. A
operation of an EG whereby it establishes its
own operating speed to maintain the correct
system intended to provide a continuous
frequency over the load range capacity of the
source of power, without delay or transients,
EG.
upon degradation or failure of the normal
source of power
3.12 Load breaker. Breaker that feeds
and protects a load, located between the
power source bus and the load.
3.13 Output breaker. Breaker located
between the BACKUP POWER SOURCE's
output terminals and the bus feeding loads,
intended to protect the BACKUP POWER
SOURCE from various fault conditions and to
provide a means to connect and disconnect
the source from its load.
3.14 Performance Discharge Test. Test
that measures the existing capacity of a
battery, to be compared to its rated capacity.
The usual units of capacity are ampere-
hours.
3.15 Short-time rating. Output rating
(typically 110%) of an EG that can be
sustained for a specified time in a specified
period of operation without necessitating
deviation from normal scheduled
maintenance (usually 2 hours in 24, per IEEE
Std 387).
5
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