TP-6714 4/10 15Section 2 Operation Tests
Section 2 Operation Tests
2.1 Introduction
Be sure to perform the functional tests described in the
transfer switch Installation Manual and in this section
before putting the transfer switch into operation.
The functional tests include the following checks:
D Manual Operation Test
D Voltage Checks
D Lamp Test
D Automatic Operation Test
Note: Perform these checks in the order presented to
avoid damaging the ATS.
Read all instructions on the labels affixed to the
automatic transfer switch before proceeding.
2.2 Manual Operation Test
If you have not already done so, test the contactor
manual operation before proceeding to the voltage
check and electrical operation test.
Note: Disable the generator set and disconnect the
power by opening the circuit breakers or switches
for both sources before manually operating the
transfer switch.
Follow the instructions in the transfer switch installation
manual to check the transfer switch manual operation.
A contactor in normal and serviceable condition
transfers smoothly without binding when operated
manually. Do not place the transfer switch into service if
the contactor does not operate smoothly without
binding; contact an authorized distributor/dealer to
service the contactor.
2.3 Voltage Check
The voltage, frequency, and phasing of the transfer
switch and the power sources must be the same to avoid
damage to loads and the transfer switch. Compare the
voltage and frequency ratings of the utility source,
transfer switch, and generator set, and verify that the
ratings are all the same.
Use the voltage check procedure explained in the ATS
Installation Manual to verify that the voltages and
phasing of all power sources are compatible with the
transfer switch before connecting the power switching
device and controller wire harnesses together.
2.4 Lamp Test
To test the LEDs on the controller’s user interface, go to
the Main screen. Press the down arrow button once,
then press the Lamp Test button and verify that all
6 LEDs on the user interface illuminate. See Figure 2-1.
System Ready
LD Exer 12/14 @ 16:00
Norm 480V Emer 480V
B View Set Test
Norm AB BC AC
##Hz ###V ###V ###V
Lamp
BYTe st Main
Press the down
arrow button.
Press and hold the
Lamp Test button.
Figure 2-1 Lamp Test
2.5 Automatic Operation Test
Check the transfer switch’s automatic control system
immediately after the voltage check. Review the
operation instructions in Section 3 before proceeding.
Note: Close and lock the enclosure door before starting
the test procedure.
Preferred Source Selection. The test procedure
assumes that Source N is the preferred source. If the
ATS is equipped with the alarm board accessory, check
the preferred source selection before proceeding with
the automatic operation test. To check the preferred
source selection, use the down arrow button to step
down from the main screen until Normal Preferred or
Emergency Preferred is displayed. See Figure 3-9 or
Figure 3-10.
Supervised Transfer Switch. If the transfer switch is
equipped with a supervised transfer switch, verify that it
is set to the Auto position.
Follow the procedure below to start a loaded test. Verify
that the ATS starts the generator set and transfers the
load to the emergency source, executing all time delays
that are set up to operate during a loss of the normal
source. End the test and verify that the transfer switch
transfers the load back to the normal source and
removes the engine start signal, executing all
appropriate programmed time delays. Refer to Section
3.6.3 for a more detailed description of the test
sequence of operation.
Load control time delay settings may affect the
operation sequences.
To Next Page
Loading...
Need help?
General
