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IB01602015E
Instruction Booklet
Page
34
Effective: August 2010
ATC-300 Contactor
Based Transfer Switch
Step 8:
Manually start the engine generator at the generator con-
troller. Check that the generator is running and the
Source 2 Available
amber LED is lit. Press the
<Step/
Enter>
pushbutton, step through the phase voltages,
frequency, and message display. If the source message
indicates that the source is Good, shut down the genera-
tor and place the Genset controller in the Auto-operating
position. If the message indicates a problem with the
source, the setpoints should be reviewed and the genera-
tor checked for proper voltage and frequency output.
Step 9:
Initiate a Load Test from the front panel of the ATC-300
(Figure 28). This may be done by setting the engine test
setpoint to:
1 Load Test
then saving the setpoints. Once the engine test setpoint
has been changed and saved, press the
<Engine Test>
pushbutton twice. The generator should start, the ATS
should transfer and run on the generator for the set test
interval, then proceed to a TDEN countdown and return
to Source 1. While the ATS is connected to Source 2,
use a voltmeter to check for correct system voltage on
the load terminals of the ATS. Check all phases on a 3-
phase system. Voltage measurements should be taken
phase to phase and phase to neutral. A load test will
cause a momentary power outage during transfer.
Figure 28. ATC-300 Logic.
Step 10:
ATC3 Controlled ATS Power Failure Test - Initiate a
Load Test by simulating an actual power failure.
1. This should be done by opening the upstream
breaker or fused disconnect switch.
2. The generator should start and the ATS should trans-
fer to Source 2.
3. After transfer, close the upstream breaker, or close
the Source 1 Control Circuit Fused Disconnect. The
TDEN timer should begin counting, and, when com-
plete, the ATS should transfer to Source 1. The
TDEC should time out and shut the Source 2 power
unit down.
WARNING
THE GENERATOR SHOULD BE MANUALLY STARTED AND THE
OUTPUT CHECKED AND VERIFIED BEFORE PROCEEDING TO STEP
8. IF IMPROPER VOLTAGE/FREQUENCY IS APPLIED TO THE LOAD,
THE ATS MAY BE DAMAGED.
ATC-300
se
se
Source 1
Source 2
Available
Available
Connected
Connected
Load
Unit Status
Alarm
Reset
Engine
Test
Lamp
Test
Help
Step
Enter
Bypass
TDNE / TDEN
NOTICE
WHILE PERFORMING TESTING, IF AN UNDESIRED OR UNDOCU-
MENTED RESULT OCCURS, FIRST CONTACT THE LOCAL GENSET
DEALER. IF THE RESULT IS NOT CORRECTED, CONTACT THE
EATON POWER QUALITY TECHNICAL SUPPORT CENTER AT 1-800-
354-2070.
