Winco PSS40LS/B - Manual (Page 4)

Page 2 1108-20 60706-148
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 system 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
PSS27LS-3 120/240 230 150
PSS27LS-4 120/208 230 150
PSS27LS-17 120/240 230 150
PSS27LS-18 277/480 * *
PSS40LS-3 120/240 230 230
PSS40LS-4 120/208 230 150
PSS40LS-17 120/240 230 150
PSS40LS-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
PSS27LS- The engine generator set consists of a GM 3.0L
Industrial, four cylinder, 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 27,000 watt
(27kW) 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 Electronic Engine Control Module (E.C.M.)
mounted in the engine generator enclosure. The E.C.M. is
equipped standard with a 3 second start delay, 3 minute cool
down delay and cycle cranking, featuring 5 cycles of 12 seconds
on/12 seconds off.
PSS40LS - The engine generator set consists of a GM 4.3L ,V-6
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 engine governor within .5 cycles variation,
no load to rated load. The 40,000 watt (40kW) 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
Electronic Engine Control Module (E.C.M.) mounted in the engine
generator enclosure. The E.C.M. is equipped standard with a 3
second start delay, 3 minute cool down delay and cycle cranking,
featuring 5 cycles of 12 seconds on/12 seconds off.
** NOTICE **
These units will automatically transfer if a power outage occurs
while running in an exercise mode.
SPECIFICATIONS
GENERATOR
MODEL WATTS VOLTS AMP H Z PH RPM
PSS27LS 27,000 120/240 112* 60 1 1800
PSS27LS-4 27,000 120/208 94* 60 3 1800
PSS27LS-17 27,000 120/240 81* 60 3 1800
PSS27LS-18 27,000 277/480 40* 60 3 1800
PSS40LS 40,000 120/240 167** 60 1 1800
PSS40LS-4 40,000 120/208 139** 60 3 1800
PSS40LS-17 40,000 120/240 120** 60 3 1800
PSS40LS-18 40,000 277/480 60** 60 3 1800
*Derate 11% for Natural Gas operation. Derate 3.5% per
1000 feet elevation above sea level.
**Derate 18% for Natural Gas operation. Derate 3.5% per
1000 feet elevation above sea level.