TP-6322 9/046 Section 2 Operation
starts the generator automatically when the normal
power source fails.
Replace the enclosure cover on the ATS enclosure and
tighten the screws that hold it in place after viewing or
making changes to the exerciser switch setting.
2.3.2 Exerciser Power Requirements
An internal one-week timer for the exerciser function
maintains its setting for up to 90 seconds after power
loss of both the normal and emergency sources. When
the normal power source fails, the generator must start
and run to provide emergency power within
approximately 90 seconds or the system loses the
previously set day and time and the exerciser is set to
the day and time that either power source returns. Then,
if the exerciser switch is in the Enable (
) position, the
controller starts and runs the generator set unloaded for
20 minutes one week from the day and time of power
source return and on subsequent weeks at the same
day and time.
2.4 Manual Operation
To test or troubleshoot the transfer switch, manually
operate the contactor using the procedure described
below.
Accidental starting.
Can cause severe injury or death.
Disconnect the battery cables before
working on the generator set.
Remove the negative (--) lead first
when disconnecting the battery.
Reconnect the negative (--) lead last
when reconnecting the battery.
WARNING
Disabling the generator set. Accidental starting can
cause severe injury or death. Before working on the
generator set or connected equipment, disable the generator
set as follows: (1) Move the generator set master switch to the
OFF position. (2) Disconnect the power to the battery charger.
(3) Remove the battery cables, negative (--) lead first.
Reconnect the negative ( --) lead last when reconnecting the
battery. Follow these precautions to prevent starting of the
generator set by an automatic transfer switch, remote
start/stop switch, or engine start command from a remote
computer.
Hazardous voltage.
Will cause severe injury or death.
Only authorized personnel should
open the enclosure.
DANGER
Servicing the transfer switch. Hazardous voltage can
cause severe injury or death. Deenergize all power sources
before servicing. Open the main circuit breakers of all transfer
switch power sources and disable all generator sets as
follows: (1) Move all generator set master controller switches
to the OFF position. (2) Disconnect power to all battery
chargers. (3) Disconnect all battery cables, negative (--) leads
first. Reconnect negative (--) leads last when reconnecting the
battery cables after servicing. Follow these precautions to
prevent the starting of generator sets by an automatic transfer
switch, remote start/stop switch, or engine start command
from a remote computer. Before servicing any components
inside the enclosure: (1) Remove all jewelry. (2) Stand on a
dry, approved electrically insulated mat. (3) Test circuits with a
voltmeter to verify that they are deenergized.
Manual Operation Procedure
1. Prevent the generator set that provides the
emergency power source to the transfer switch
from starting.
a. Move the generator set master switch to the
OFF position.
b. Disconnect power to the generator engine start
battery charger, if installed.
c. Disconnect all generator engine start batteries,
negative (--) leads first.
2. Disconnect or turn off both the normal and
emergency power sources by opening upstream
circuit breakers or switches to the transfer switch.
Note: The manual operation handle is provided for
maintenance purposes only. Do not attempt
to use the manual operation handle to
transfer the load.
3. Remove the cover on front of the transfer switch
enclosure.
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