2.7.5
Module Emergency Off Button
Pressing the emergency off button shall cause the affected module to be
disconnected from the system, via its input protective device, output
protective device, and battery protective device. Activation of this
button shall not affect the operation of the remainder of the system.
2.8
SYSTEM CONTROL CABINET
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NOTE: Delete for single module UPS systems.
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2.8.1
The multi-module UPS system shall be provided with a separate control
cabinet for system output, summary monitoring, and control. This unit
shall contain; bus bar connections to collect the output from each module,
the static switch and its bypass breaker, the UPS system output protective
device, and the UPS output switchgear.
2.8.2
UPS Output Switchgear
The UPS output switchgear shall consist
of a main protective device feeding
the UPS output switchgear critical load
bus, a load bank protective device
(connected on the line side of the main
protective device), a maintenance
bypass protective device and associated
feeder protective devices for the
critical loads.
2.8.2.1
Interlocking
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NOTE: Delete references to load bank protective
device if not used.
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The main protective device and the load bank protective device shall be
interlocked to prevent both being closed at the same time. The maintenance
bypass protective device shall be interlocked with the UPS system output
protective device and the static bypass switch. The maintenance bypass
protective device shall not be capable of closing until the static bypass
switch is closed and the UPS system output protective device is open. Once
the maintenance bypass protective device is closed, the UPS output
switchgear main protective device shall be capable of opening to isolate
the critical loads from the UPS output. The load bank protective device as
well as the UPS system output protective device shall then be capable of
closing to permit load bank testing.
2.8.2.2
Switchgear
UPS output switchgear shall be provided in accordance with Section 16475A
COORDINATED POWER SYSTEM PROTECTION.
2.8.3
System Control Panel
A separate control panel shall be provided for the overall UPS system. The
panel shall be on the front surface of the system cabinet. The controls,
meters, alarms and indicators for operation of the UPS system shall be on
this panel.
SECTION 16265A
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