IB140036EN
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Instruction Booklet
Effective: October 2014
Page
29
O&M Manual for 40-1200A (480/600 Vac) ATC-900 3-Position,
Open/Closed Transition 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:
The engine control contact connections are located on
the logic panel of the ATS. Connect the engine start
wires to the red terminal blocks. See the drawings for
the switch. A contact closes between these terminal
when an engine start signal is provided by the ATS logic.
The wiring diagram provides additional engine start con-
nection information. Use the proper wire size as listed by
the generator set (Genset) manufacturer
For the I/O connections, there are some switches that
the Inputs are wired to a terminal block while others are
not. When they are not, the terminal blocks on the con-
troller are simply used, see Figure 13A. The switch and
listed terminal blocks are shown below.
1200A D frame
Inputs/Gen Start to terminal blocks
NEVER
connect directly to a starter solenoid or ignition
system.
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 amber LED
should light on the controler. Using a voltmeter, check
for proper system voltage on Source 1 and load termi-
nals. Check all phases on a 3-phase switch. Voltage
measurements should be taken phase to phase and
phase to neutral.
Step 6:
To view the setpoints, see the ATC-900 instruction
manual.
