Winco PSS75LS/B - Manual (Page 4)

Page 2 5234-00 60706-173
TESTING POLICY:
Before any generator is shipped from the factory, it is fully
checked for performance. The generator is loaded to its full
capacity, and the voltage, current, and frequency are carefully
checked.
Rated output of generators is based on engineering tests of
typical units, and is subject to, and limited by, the temperature,
altitude, fuel, and other conditions specified by the manufacturer
of the applicable engines.
INTRODUCTION AND DESCRIPTION
The package standby engine generator set includes all items
necessary for a completely automatic standby power system as
standard equipment. The entire package is then tested to
insure proper operation of all components and the total system
performance and reliability.
DESCRIPTION
This package power system is designed to automatically provide
standby power to unattended loads during electrical outages.
Upon an interruption of normal electrical service this package
power systems electrical control circuits will automatically start
the engine. The generator will produce electrical power and the
Automatic Transfer Switch (A.T.S.) will automatically transfer the
electrical loads to the engine-generator set. Upon restoration of
normal electrical service the A.T.S. will sense return of the normal
commercial power and retransfer the load back to normal
commercial power source. The engine control circuits will begin a
3 minute cool-down cycle, after which the fuel supply will be shut
off and the engine ignition system disabled.
These package power systems consist of two major components:
1) WINCO AUTOMATIC TRANSFER SWITCH
(Non-UL model)
The table below shows the different Automatic Switch sizes
typically used with each unit.
CONTACTOR RATING
MODEL VOLTAGE LINE GENERATOR
PSS50LS-3 120/240 230 230
PSS50LS-4 120/208 230 230
PSS50LS-17 120/240 230 230
PSS50LS-18 277/480 * *
PSS75LS-3 120/240 400 320
PSS75LS-4 120/208 400 320
PSS75LS-17 120/240 400 320
PSS75LS-18 277/480 * *
*Special order UL Transfer Switches
These Automatic Transfer Switches (A.T.S.) are wall mount
switches designed for inside installation. The A.T.S. consists of
a line side contactor and a generator side contactor. The
contactors are both electrically and mechanically interlocked. A
seven day electronic exerciser clock is installed in the A.T.S. as
standard equipment. The A.T.S. also contains the power failure
sensing circuitry necessary to send a start/stop signal to the
engine generator set.
2) ENGINE/GENERATOR
PSS50LS- The engine generator set consists of a GM 5.7L V-8
industrial, liquid cooled engine equipped to run on L.P./N.G. 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 50,000 watt (50kW) 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 mounted in a drip proof enclosure for outside
installation. Connection boxes are provided to all customer
connections (both AC output and DC control). A customer
supplied 12 Volt, 650 CCA (BCI group 24) battery is required to
complete the installation. Engine operation is controlled by an
Digital Genset Controller (DGC) mounted in the engine generator
enclosure.
PSS75LS - The engine generator set consists of a GM 5.7L ,
Turbo charged V-8 iIndustrial, liquid cooled engine equipped to
run on L.P./N.G. fuel. The engine operates at 1800 rpm and
frequency regulation is maintained by the engine governor within
.5 cycles variation, no load to rated load. The 75,000 watt (75kW)
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 mounted in a drip proof
enclosure for outside installation. Connection boxes are provided
to all customer connections (both AC output and DC control). A
customer supplied 12 Volt, 650 CCA (BCI group 24) battery is
required to complete the installation. Engine operation is con-
trolled by an Digital Genset Controller (DGC) mounted in the
engine generator enclosure.
** NOTICE **
These units will automatically transfer if a power outage occurs
while running in an exercise mode.
Digital Genset Controller
The Digital Genset Controller (DGC) is a programmable engine
control module utilizing the latest technology in digital control.
The DCGs in these units have been programmed to meet the
more sophisticated needs of today's generator users.
The following system settings have been programmed into the
DCG:
Start Delay 10 Seconds
Generator Cranking Style Cycle
Number of Cranking Cycles 3
Cycle Crank Duration 15 Seconds
Crank Disconnect 30% of Rated Speed
Cool Down Timer 5 Minutes
High Coolant Lockout 60 Seconds
Low Oil Pressure Delay 10 Seconds
The following pre-alarm and alarm setting have been pro-
grammed in the DCG:
Pre-Alarm Alarm
High Coolant Temp (Deg F) 210 230
Low Oil Pressure 25 PSI 15 PSI
Overspeed N/A 115%