Table of Contents
Advertisement
Press and hold the Test pushbutton for about 2 seconds
to end the test. The retransfer sequence operates as
though Source N has been restored after a failure. The
load is transferred back to source N. All time delays are
executed and an in-phase transfer will occur if enabled.
The Source E LEDs light during the time delays. The
generator set shuts down.
If Source E is lost during the test and Source N is
available, the transfer switch will immediately transfer to
the Source N position, bypassing all time delays. If
source N is lost during a loaded test with the contactor in
the standby position, the test will continue to run.
1.5
Automatic Operation Test
Check the transfer switch's automatic control system
immediately after the voltage check.
operation instructions in Section 1 before proceeding.
Note: Close and lock the enclosure door before starting
the test procedure.
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
2.2.3 for a more detailed description of the test
sequence of operation.
Note: If the standby source fails during a loaded test,
the ATS will immediately attempt to transfer to the
preferred source.
TP-6865 4/14
Automatic Operation Test Procedure
1. Check the controller LED indicators to verify that
the Source N Position and Source N Available
indicators are lit.
2. Verify that the generator set master switch is in the
AUTO position.
3. Press and hold the Test button for 6 seconds or
longer to start a loaded test.
4. Verify that the generator set starts and the Source
E Available LED lights.
5. Verify that the switch transfers the load to Source E.
Observe the controller LEDs and display as the
time delays execute and the load is transferred.
Review the
After the preferred-to-standby transfer time delay,
verify that the Source N Position LED turns off and
the Source E Position LED lights, indicating that the
switch has transferred the load to Source E.
6. Press and hold the Test pushbutton for about 2
seconds to end the test.
7. Verify that the switch transfers the load back to
Source N.
delay, verify that the Source E Position LED goes
out and the Source N Position LED lights,
indicating that the switch has transferred the load to
Source N.
8. After the engine cooldown time delay expires, the
engine start signal is removed. Verify that the
generator set stops.
Note: The generator set may have an engine cooldown
After the standby-to-preferred time
time delay that causes the generator set engine
to run after the transfer switch engine start signal
is removed.
Section 1 Operation
11
Advertisement
Table of Contents
