5
OPM-124/B
INTRODUCTION
PRODUCT DESCRIPTION
The Package Standby System is designed to automatically
provide standby power to unattended loads during
electrical outages. Upon interruption of normal electrical
service, the Packaged Standby System electrical control
circuits will automatically start the engine. The generator
will produce electrical power and the Automatic Transfer
Switch (ATS) will automatically transfer the electrical loads
to the engine-generator set. Upon restoration of normal
electrical service the emergency transfer switch will sense
return of the normal commercial power. The Automatic
Transfer Switch will transfer the load back to the normal
commercial power source. The engine control circuits will
begin a cool-down cycle, after which the fuel supply will be
shut off and the engine ignition system disabled.
These packaged standby systems consist of two major
components:
1. AUTOMATIC TRANSFER SWITCH
A wall mounted ASCO 300 Automatic Transfer Switch
(ATS) designed for inside or outside installation. The
transfer switch is UL1008 approved. A fourteen day
electronic exerciser circuit is installed in the ATS as standard
equipment. The ATS also contains the power failure sensing
circuitry necessary to start and stop the engine generator
set. The transfer switch is also equipped standard with a 3
second start delay, and a 15 second transfer delay to allow
the engine to warm up before transferring the load to the
generator. When the line power is restored the ATS has
a 5 minute transfer delay to allow the incoming utility to
stabilize before transferring back to line power and then
an additional 1 minute engine cool down delay before the
engine shuts down. Read and understand the ATS owners
manual before installing, servicing or operating the transfer
switch.
MINIMUM
UNIT VOLTAGE
ATS
AMPERAGE
PSS150-3
120/240
600
PSS150-4
120/208
500
PSS150-17
120/240
500
PSS150-18
277/480
225
2. ENGINE / GENERATOR
The engine generator set consists of a PSI 8.8L, Industrial,
V8, liquid cooled engine equipped to run on LP/NG fuel.
The engine operates at 1800 rpm and frequency regulation
is maintained by the electronic governor within .5 cycles
variation, from no load to rated load. The generator is
a single bearing, direct drive, rotating field design. The
generator is connected to the engine flywheel via flexible
drive disks. The engine generator is available mounted
in a weather proof enclosure for outside installation.
Connection boxes are provided to all customer connections
(both AC output and DC control). A customer supplied
12 Volt, 900 CCA (BCI group 31) battery is required to
complete the installation. Engine operation is controlled
by a Deep Sea (DSE) MKII engine mounted in the engine
generator enclosure.
NOTICE:
These units will automatically transfer if a power outage
occurs while running in an exercise mode.
