components accessible from the front. Doors shall be key lockable.
Operating controls shall be located outside the locked doors. Input,
output, and battery cables shall be installed through the top or bottom of
the cabinet.
1.3.3.11
Cabinet Finish
Equipment cabinet shall be cleaned, primed and painted in the
manufacturer's standard colors, in accordance with accepted industry
standards.
1.3.3.12
Mimic Bus
If painted, mimic bus and other front-panel markings (such as those showing
circuit breakers or switches and fuses) shall be painted with durable
acrylic-based paint.
1.3.3.13
Live Parts (300 Volts and Above)
Live parts (300 volts and above) that are exposed when front access doors
are open shall be adequately protected or covered to minimize the chance of
accidental contact.
1.3.3.14
Drawout Assemblies
Drawout assemblies weighing 23 kg 50 lbs or more shall be provided with a
means of lifting, either an overhead device or a hoisting device.
1.3.3.15
Safety
UPS shall be equipped with instruction plates including warnings and
cautions, suitably located, describing any special or important procedures
to be followed in operating and servicing the equipment.
1.3.4
Performance Requirements
1.3.4.1
Normal Operation
The UPS module rectifier/charger shall convert the incoming ac input power
to dc power for the inverter and for float charging the battery. The
inverter shall supply ac power continuously. Inverter output shall be
synchronized with the bypass ac power source, provided that the bypass ac
power source is within the specified frequency range. The UPS system shall
supply ac power to the critical loads.
1.3.4.2
Loss of ac Input Power
The battery shall supply dc power to the inverter so that there is no
interruption of ac power to the critical load whenever the ac input power
source deviates from the specified tolerances or fails completely. The
battery shall continue to supply power to the inverter for the specified
protection time. At the same time, an alarm shall sound to alert operating
personnel, allowing startup of a secondary power source or orderly shutdown
of the critical load.
1.3.4.3
Return of ac Input Power Source
The rectifier/charger shall start and assume the dc load from the battery
when the ac input power source returns. The rectifier/charger shall then
SECTION 16265A
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