Brochures and Data Sheets

6
PCS Switchgear Design
Supports Reliable Operation
Dedicated Master Controls
send engine start signals to
generators and provide load
management within entire
emergency power system.
In the event the Master PLC
fails, the master controls will
still issue engine start sig-
nals allowing all loads to be
energized by closing break-
ers manually or by initiating
ATS’s transfer automatically
Master PLC Redundancy
is available for hot
standby or hot standby
synchronized
Two Manual Paralleling
Provisions are a touch
screen with a synchroscope
and additional push-buttons
mounted on the Master
Section door
Best Battery System
circuitry selects the best DC
source among the generator
starting batteries to provide
regulated control power to
the Master and all Gen-
erator controls, including
PLC’s (even during engine
cranking). Also, any engine
battery can feed the paral-
leling circuit breaker shunt
trip if that engine battery
has failed
Priority Load Control au-
tomatically adds load to the
generator bus as generators
come online, and shed load
as kW load capacity de-
creases. Loads are added in
an optional stepping fashion
to minimize transients on
the engine generator and
the system bus
Manual Load Shed Bypass
allows operator to manu-
ally re-add previously shed
load via push-buttons. In
the event of operator error,
the controls will protect the
power system – subsequent
overload will automatically
re-shed load detected by
bus under frequency
Bus Load Optimization
allows automatic shed
block(s) of load shedding
when any generator online
fails to prevent overloading
of remaining generators and
re-add loads to the system
bus according to their prior-
ity value and a prescribed
user selectable sequence
Generator Controls can
be designed within dedi-
cated individual generator
sections or dual generator
sections. In both approach-
es, the controls enable
generator PLC redundancy
– if one generator PLC fails
the second generator PLC
takes over. The generator
PLC provides engine start/
stop, cranks the engine,
monitors engine alarms and
shutdowns and controls the
paralleling breaker
Multiple (Master OIP type)
Touch Screens are available
for the generator controls
Firewalled Communica-
tion facilitates communica-
tion with building manage-
ment monitoring networks
via Ethernet data and/or
Concentrated (Gateway
PLC) Modbus
Maximum reliability and excellent value