Winco PSS25000/A - Manual (Page 11)

PAGE 9 5076-10 60706-171
side contactor, terminals G1 and G3. The G-N connection
will be made on the stand-off in the bottom of the ATS.
The line terminals in the A.T.S. are marked “LINE - L1,
L-N, L3”. The “hot” load leads L1 and L3 are wired line
side contactor, terminals L1 and L3. The L-N connection
will be made on the stand-off in the bottom of the ATS.
The load terminals in the A.T.S. are marked “LOAD - T1,
T-N, T3”. The “hot” leads T1 and T3 will wire directly to
the lugs between the two contactors marked “LOAD”.
Copper jumper straps have already been installed
between the upper terminals on the generator contactor
and the lower terminals on the line side contactors. The
T-N connection will be made on the stand-off in the
bottom of the ATS.
The Ground leads can be connected to the ground lug
in the ATS, or they can be bonded together along with a
lead from the ground lug. The ATS must be grounded to
the system ground.
PSS25000 Three Phase (FIGURE 5)
The three phase units are installed the same as the
single phase units above, except a fifth power lead is
added, (i.e. a G2 from the generator, L2 on the line side
and a T2 on the load side). In the 120/240 volt configura-
tion the G3, L3 and T3 will be the high voltage (wild) leg.
The other difference is a three phase power monitor
has been installed in the A.T.S. to monitor each phase for
low voltage. This three phase monitor is phase rotation
sensitive and comes from the factory set up for A-B-C
phase rotation. If you have trouble getting the A.T.S. to
pickup the line power on initial installation, try switching
the A and B phase on the monitor. Your rotation may be
C-B-A. If so, be sure to match the generator rotation to
your current line rotation or your three phase motors will
try to turn backwards.
*************
***** WARNING *****
*************
When installing a Three Phase 240 Volt Delta system be
sure you know which lead is the high voltage leg (208
Volt line to neutral). The generator has the high voltage
lead connected at G3.
INSTALLATION NOTES
The load current carrying wires (L) and (T) must be
sized to handle the maximum load current without
excessive voltage drop. By code, the wire must be heavy
enough to handle the full current rating of the main line
circuit-breaker (or fuse) in the entrance (or sub-panel)
protecting the contactor switch.
All wires should be installed in rigid or flexible conduit.
(Knockouts are provided in the control box).
Because of the many different types of service, feeder,
and distribution equipment, no specific wiring instruc-
tions can be provided. It is, however, recommended that
only copper wire be used. In all cases it is essential that
while the load is connected to the generator, there can be
absolutely no feedback from the generator to the power
line or the power line to the generator. When properly
installed, the normal A.T.S. Control and safety systems
will eliminate all paths for feedback. Check with your local
electrical inspector on applicable local, state and federal
codes.
FIGURE 4
PARTIAL SYSTEM
SINGLE PHASE
FIGURE 5
FULL SYSTEM
THREE PHASE