Winco PSS20000/E - Manual (Page 4)

PAGE 2
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 system includes all items
necessary for a completely automatic standby power
system as standard equipment.
DESCRIPTION
This package standby system is designed to auto-
matically provide standby power to unattended loads
during electrical outages. Upon an interruption of normal
electrical service the package standby 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 emergency
transfer switch will sense return of the normal commer-
cial power. The Automatic Transfer Switch will retransfer
the load back to 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 Automatic Transfer Switch (A.T.S.)
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 neces-
sary to send a start/stop signal to the engine generator
set.
Standard Automatic Transfer Switch Sizes
(NON-UL)
UNIT LINE SIDE GENERATOR
CONTACTOR SIDE CONTACTOR
PSS20000 230 AMPS 150 AMPS
Optional UL Automatic Transfer Switch Sizes
UNIT LINE SIDE GENERATOR
CONTACTOR SIDE CONTACTOR
PSS20000 100 AMPS 100 AMPS
200 AMPS 200 AMPS
Both the 100 amps and the 200 amps UL Switches are
available in single and three phase.
Additional optional A.T.S. sizes are available to meet
specific needs. Contact your local WINCO Rep. or the
WINCO Sales Department for a quote.
2) ENGINE/GENERATOR
PSS20000 - The engine generator set consists of a
Ford Industrial, four cylinder, water cooled engine
equipped to run on L.P. or N.G. fuel. The engine operates
at 3600 rpm and frequency regulation is maintained at 60
Hz, by an electronic governor mounted on the engine.
The 20,000 watt (20kW) generator is a single bearing,
direct drive, rotating armature design. It has compound
fields with an automatic voltage regulator installed to
maintain normal voltage under full load conditions. The
generator is connected to the engine flywheel via a
flexible drive disk. The engine generator is mounted in a
water tight enclosure for outside installation. Connection
boxes are provided for all customer connections (both AC
output and DC control). A customer supplied 500 CCA
(BCI group 24) battery is required to complete the
installation. Engine operation is controlled by an Elec-
tronic 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 consisting of five, 12 second on/
12 second off cycles. The ECM has both oil pressure and
high water temperature delays build into the starting
circuit. During initial start up the oil pressure delay is 12
seconds, to allow the engine time to build oil pressure,
before a shutdown will occur. The high water tempera-
ture shutdown has a 60 to 90 second lockout, allowing
the engine time to clear the hot water out of the block in
case of a hot restart. In addition if the generator should
lose output during a run cycle the engine will continue to
run for about 60 seconds and then shutdown and display
an overcrank light, the starter will not re-engage during
this time or until the generator selector switch has been
cycled off and back on. This is the only way to clear a
fault light.
** NOTICE **
This unit will automatically transfer if a power outage
occurs while running in an exercise mode.