Winco PSS70000 - Manual (Page 9)

60706-124 Page 7 60541
Three phase unit shown, for single phase
wiring disregard L-2, T-2, G-2.
A.C. ELECTRICAL CONNECTIONS
Single Phase
The standby generator terminals in the A.T.S are marked
“GENERATOR - G1, G-N, G3”. The “hot” leads G1 and G3 wire
directly to the top lugs on the generator side contactor, terminals
G1 and G3. The G-N connection is made to the lug on the
standoff just to the right of the generator side contactor.
The line terminals in the A.T.S. are marked “LINE - L1, L-N, L3”.
The “hot” leads L1 and L3 will wire directly to the top lugs on the
line side contactor. The L-N connection will be made on the
stand-off just to the left of the line side contactor.
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 lower lugs on
the line side contactor. Jumper leads have already been
installed between the lower lugs on the line side and the lower
lugs on the generator side contactors. The T-N connection will
be made on the stand-off just to the left of the contactor.
An equipment grounding lug is provided just above the
T-N connection for your use in grounding the transfer switch..
FIGURE 5
Three Phase
The standby generator terminals in the A.T.S. are marked
“GENERATOR - G1, G2, G3 and G-N. The “hot” leads G1 G2
and G3 wire directly to the generator side contactor, terminals
G1, G2 and G3. The G-N connection is made to the lug on the
standoff just to the right of the generator side contactor.
The line terminals in the A.T.S. are marked “LINE - L1, L2, L3
and L-N”. The “hot” leads L1, L2 and L3 will wire directly to the
top lugs on the line side contactor. The L-N connection will be
made on the stand-off just to the left of the contactor.
The load terminals in the A.T.S. are marked “LOAD - T1, T2, T3
and T-N”. The “hot” leads T1, T2 and T3 will wire directly to the
lower lugs on the line side contactor. Jumper leads have
already been installed between the lower lugs on the line side
and the lower lugs on the generator side contactors. The T-N
connection will be made on the stand-off just to the left of the
contactor.
An equipment grounding lug is provided just above the
T-N connection for your use in grounding the transfer switch.
All the neutral leads (G-N, L-N and T-N) must be carried through
the A.T.S. These leads are all bonded together within the A.T.S.
and are bonded to GROUND at one common point. If your
system requires an isolated neutral, this neutral to ground bond
can be isolated by removing the copper strap located between
the LINE terminal L-N and the ground lug in the panel. This
action, along with lifting the Neutral to Ground bond in the
generator connection cabinet, will effectively change this unit to a
fully isolated neutral system.
The generator output leads in the generator connection box
follow the same marking pattern. i.e. G1, G-N and G3 on the
single phase and G1, G2, G3 and G-N on the three phase units.
*************
***** WARNING *****
*************
EQUUIPMENT DAMAGE - When installing a Three Phase 240
volt system be sure you know which lead is the high voltage
"wild" leg (208Volt line to neutral). The generator normally carries
the high voltage on the G3 lead.
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.
A fused disconnect (circuit breaker or fuses) must be installed
between the engine generator and the A.T.S. panel. See the
table below for disconnect sizing. Failure to install a proper
fused disconnect will void any warranty on the generator end. All
wiring from the engine-generator to the transfer switch must be
of sufficient size to handle the appropriate fused disconnect
amperage.
All wires should be installed in rigid or flexible conduit. (Knock-
outs are provided in the control box)