Generac Power Systems ATC-300+ Operation And Maintenance Manual page 28

Instruction Booklet
Page 28 Effective: September 2011
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 22). This contact is CLOSED whenever
S1 - Line
Control
S1 - Neut
Power
S2 - Line
S2 - Neut
Phase C Phase C
Source 1 Source 1
Phase B Phase B
Phase A Phase A
Phase C Phase C
Source 2 Source 2
Phase B Phase B
Phase A Phase A
Figure 22. 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 23). Using a voltmeter, check for
proper system voltage on Source 1 and load terminals.
Check all phases on a 3-phase switch. Voltage measure-
ments should be taken phase to phase and phase to neu-
tral.
J7
J1
J2
TERMINALS 13 & 14
J5
1 1 2 2 3 3 9 10 11 12 13 14 9 10 11 12 13 14
4 4 5 5 6 6 7 7 8 8
Output Relays
ATC-300+ Controller - 2 Position Contactor type (In-Phase) - CAT#8160A00G27
ATC-300+ Controller - 3 Position Contactor type (TDN) - CAT#8160A00G28
For more information visit: www.generac.com
40-400A (480/600Vac) ATC-300+ 3-Postion
the engine generator is needed, and should be connected
to a generator controller. NEVER connect directly to a
starter solenoid or ignition system. See the Genset man-
ufacturer instruction leaflet for recommended wire sizes
and location procedures.
J4
1 1 2 2 3 3
4 4 5 5 6 6 7 7
Control Inputs
6.5 in.
Contactor Based Transfer Switch
1
RS485
ON
Termination
SHD
4
RS-485
J10
Com
3
MODBUS
B
2
1 A
Tx
7
Rx
6
J3
Gnd Programming
5
Port
5V
4 4
Out
3
In
2
8.0 in.
1 Clk
J8
Emergency
8
Inhibit
Control
7
Inputs
6 Manual
Re-Transfer
5
4
K4 NO
S2
Output
3
K4 C om
Close
Relays
2
K3 NO
S1
1
K3 Com
Close
9 10 9 10
8 8
IB01602078E