Additional Features For All Systems - Emerson Liebert PPC 15-30 kVA Technical Data Manual

A F
DDITIONAL EATURES FOR
Flexible Output Cables and Terminations
A flexible output cable
system is available for
Precision Power Centers.
Insulated cable conduc-
tors are protected by jack-
eted, liquid-tight, flexible
steel conduit with an inte-
gral copper shielding con-
ductor. Each output cable
is fabricated to the specified length and type of ter-
mination to match the equipment it will be connected
to. "Add-on" UL listed cables for field installation are
also available.
Terminations include receptacles to match equip-
ment plugs and conduit termination fittings with
conductor pigtails for hard wire connection.
Additional Pole Capacity
Additional panelboard pole capacity is available for
all power distribution units.
An additional 42-pole panelboard can be added to the
Precision Power Center for a total of 84 poles.
The Precision Power Center can have three 42-pole
panelboards for a total of 126 poles. (The three-pan-
elboard configuration is not available on Top Exit
units.) For additional poles, distribution side sections
can be added. Each side section provides another
42-pole panelboard.
Optional Panelboard Types
Branch circuit panelboards that accept bolt-in circuit
breakers are optional, as are panelboards for plug-in
or bolt-in breakers manufactured by Square-D Com-
pany.
A S
LL YSTEMS
Subfeed Output Circuit Breaker
A subfeed output circuit
breaker, powered ahead of
the output panelboards, is
available on the Precision
Power Center to feed a
remote distribution unit,
panelboards, or other
loads. Multiple Subfeed
Output Breakers are
available upon request.
High-Voltage Junction
Box With Flexible Input
Cable
The high-voltage junction
box can be installed under
a raised floor system. The
junction box contains ter-
minals for connecting the
incoming power line and
ground conductors. A
10-foot (3 m) flexible cable
is furnished for connec-
tion between the junction
box and the power conditioning system.
Low-Voltage Junction Box With Flexible Input
Cable
The low-voltage junction box
can be installed under a
raised floor. It contains ter-
minals for connection of all
building interface alarms or
controls, and all Remote
Emergency Power Off
switches. A 10-foot (3-meter)
flexible control cable for the
system is furnished for con-
nection between the junc-
tion box and the power conditioning system.
Secondary Class Surge Arrester
A secondary class surge
arrester using high capac-
ity utility-grade metal
oxide resistors is wired to
all three phases of the
input power to shunt volt-
age surges to building
ground. The arrester is
rated for a maximum
FOW spark-over of 3200 volts with maximum dis-
charge voltage of 2.2 kV at 1500 amperes, assuming
a standard 8 x 20 microsecond waveform. The surge
arrester provides protection against high voltage
surges that can cause insulation or wiring failures.
6

Additional Features for All Systems