IB140024EN
For more information visit: www.eaton.com
Instruction Booklet
Effective: October 2014
Page
27
ATC-300/900 40-400A (480/600Vac)
3-Postion Contactor Based Transfer Switch
Step 3:
Turn the generator OFF at the generator control panel.
This will prevent unexpected activation of the generator.
Step 4:
Connect the Engine Generator Start wires to terminals
13 and 14 on the J-5 connector on the ATC-300+ Con-
troller (Figure 19). This contact is CLOSED whenever
the engine generator is needed, and should be con-
nected to a generator controller.
NEVER
connect
directly to a starter solenoid or ignition system. See the
Genset manufacturer instruction leaflet for recom-
mended wire sizes and location procedures.
1
2
3
4
5
6
7
8
9
10 11 12 13 14
1
2
3
4
5
6
7
8
9
10 11 12 13 14
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
J5
J7
J2
J1
J4
7
6
5
4
3
4
J3
Phase C
Phase B
Phase A
Source 1
Phase C
Phase B
Phase A
Source 1
Phase C
Phase B
Phase A
Source 2
Phase C
Phase B
Phase A
Source 2
S1 - Line
S1 - Neut
S2 - Line
Control
Power
S2 - Neut
Clk
In
Out
5V
Gnd Programming
Port
K1
-
(C
om
)
K1
-
(N
O
)
K2
-
(C
om
)
K2
-
(N
O
)
P
re
tr
a
ns
fe
r
-
(C
om
)
Pr
e
tr
a
ns
fe
r
-
(N
O
)
Pr
e
tr
a
ns
fe
r
-
(N
C
)
Al
a
rm
-
(C
om
)
Al
a
rm
-
(N
O
)
A
la
rm
-
(NC)
E
a
rt
h
G
rou
nd
Ge
n S
ta
rt
-
(C
om
)
Ge
n S
ta
rt
-
(N
O)
Output Relays
+
32 V
D
C
S
our
ce 1
C
lo
se
d
+3
2
V
D
C
S
our
ce 2
C
lo
se
d
+3
2
V
D
C
Loc
kout
+3
2
V
D
C
Go
T
o
S
o
ur
ce
2
+3
2
V
D
C
Mo
n
ito
r Mo
de
Control Inputs
8.0 in.
6.5 in.
3
4
1
2
7
8
5
6
Output
Relays
Control
Inputs
J8
K4 NO
K4 C om
K3 NO
K3 Com
2
1
Rx
Tx
Emergency
Inhibit
Manual
Re-Transfer
J10
3
4
2
1
RS485
Termination
RS-485
MODBUS
A
B
Com
SHD
1
ON
S2
Close
S1
Close
S2
Open
S1
Open
TERMINALS 13 & 14
Figure 19. Engine Generator Control Connection.
Step 5:
Apply Utility (Source 1) power. If the switch is properly
applied for the system voltage ordered, the display
should work and the Source 1 Available white LED
should light (Figure 20). Using a voltmeter, check for
proper system voltage on Source 1 and load terminals.
Check all phases on a 3-phase switch. Voltage mea-
surements should be taken phase to phase and phase to
neutral.
