Winco PSS25000/A - Manual (Page 10)

PAGE 8 60706-171 5076-10
The Automatic Transfer Switch connects the load (lights,
furnace, outlets, etc.) to the normal power line during
standby. When normal power fails, the A.T.S. starts the
engine generator set, disconnects the power line and then
connects the load to the standby generator set. When
normal power is restored, the automatic switch retransfers
the electrical load to the normal service and stops the
engine. The A.T.S. panel should be mounted as close to
the distribution panel as possible.
*****NOTE*****
EQUIPMENT DAMAGE- The standard NON-UL Winco
Single Phase ATS does not protect against undervoltage.
If you are in an area that is suspectable to brown outs
(low voltage) you may want to consider adding an
undervoltage sensor to standard ATS panel.
*************
***** WARNING *****
*************
All wiring must be done by a licensed electrician, and
must conform to the national electrical code and comply
with all state and local codes and regulations. Check with
your electrical inspectors before proceeding!
The standard Non-UL Automatic Transfer Switch used
with the PSS25000 system has a 230 Amp line side
contactor installed to handle your normal power needs
and a 150 Amp generator side contactor to handle the
emergency generator output. Before installing the A.T.S.
you must first ensure that the 230 Amp line side contac-
tor will be sufficient to handle your complete service. See
Figure 3. (i.e. the main line breaker must not be larger
than 230 Amps). If you have a larger main line breaker,
you will not be able to transfer the complete electrical
system. In this case it will be necessary to install a
secondary emergency distribution panel. See Figure 4.
NOTE: THE MAXIMUM OUTPUT OF THE GENERATOR IS
104 AMPS AT 240 VOLTS SINGLE PHASE, 86 AMPS AT
208 VOLTS, 75 AMPS AT 240 VOLTS AND 37 AMPS AT
480 VOLTS THREE PHASE. You must also take this into
consideration when deciding whether to install an
emergency distribution panel.
*************
***** DANGER *****
*************
Be certain the operation selector switch on the front of the
A.T.S. Control is in the “stop” position and the main power
switch “off”. For your own protection, verify these impor-
tant safety precautions yourself with reliable instruments
before proceeding.
A.C. ELECTRICAL CONNECTIONS
*************
***** WARNING *****
*************
A FUSED DISCONNECT OR CIRCUIT BREAKER
MUST BE INSTALLED BETWEEN THE GENERATOR
AND THE A.T.S. PANEL TO PREVENT OVERLOADING
AND BURNING OUT THE GENERATOR. FAILURE TO
PROVIDE A FUSED DISCONNECT OR CIRCUIT
BREAKER, RATED AT GENERATOR RATING WILL
VOID YOUR WARRANTY IN CASE OF GENERATOR
FAILURE.
FIGURE 3
Full System
Single Phase
Single Phase
Generator Connections
To gain access to the customer connections, remove
the panel the warning light and the selector switch are
mounted on, inside the left hand access door. Both AC
and DC connections are made behind this panel. For
your convenience you may also access these connections
by removing the housing end panel on the generator end
of the housing and removing the back panel of the
engine control box. Four AC power leads are required
between the generator and the A.T.S. The power leads
coming into this connection box from the generator end
are labeled G1, G3, N for neutral and a ground wire to the
grounding lug. The engine control leads are currently
connected to some of the generator leads. These leads
must remain with the generator leads they are connected
to. The neutral lead is shipped not bonded to the ground,
current code requires the generator to be wired with an
isolated neutral. This will require you to run four AC leads
from the generator to the A.T.S. as you will need to run
both a neutral and a ground lead. All wires must be sized
to handle 104 amps minimum, the type of wire you use
will determine the gauge required. Consult your local wire
supplier for proper gauge and type for your installation.
A.T.S. Connections (Winco NON-UL Only)
The standby generator terminals in the A.T.S are
marked “GENERATOR - G1, G-N, G3”. The “hot” leads
G1 and G3 from the generator are wired to the generator