TP-6322 9/04 3Section 2 Operation
Section 2 Operation
Hazardous voltage.
Will cause severe injury or death.
Disconnect all power sources before
opening the enclosure.
DANGER
Have preventive maintenance performed on the
transfer switch at regular intervals after installation. See
Section 3 for instructions.
Contact an authorized distributor/dealer to inspect and
service the transfer switch when any wear, damage,
deterioration, or malfunction of the transfer switch or its
components is evident or suspected; do not energize
the switch.
2.1 Startup
Perform the following powerup procedure after
maintenance or service of the standby system that
requires disconnection of power sources from the
transfer switch, not for initial startup.
For initial startup, follow the instructions in the
Installation section in the operation and installation
manual for the transfer switch. See List of Related
Materials in the Introduction section of this manual for
the manual part number.
Read and understand documentation provided with the
switch and labels affixed to the switch. Review the
operation of installed accessories.
Follow the steps below to power up the transfer switch
and prepare it for automatic operation.
Powerup Procedure
1. Place the generator set master switch in the OFF
position to prevent starting the generator set.
2. Disconnect both the normal and emergency power
sources by opening circuit breakers or switches
leading to the transfer switch.
3. Open the enclosure and check that the contactor
wiring harness is connected to the electrical
controls at connector P1. See Figure 4-2.
4. Follow the manual operation procedure to prepare
the transfer switch for automatic operation. See
Section 2.4 for instructions.
5. Replace the transfer switch enclosure cover. Lock
NEMA type 3R enclosures with a padlock. Replace
and tighten the fastening screws on the enclosure
cover.
6. Prepare the standby generator set for operation.
Check the oil level, coolant level, fuel supply,
batteries, and items specified by the generator set
Prestart Checklist or similar instructions in the
operation manual.
7. Place the generator set master switch in the AUTO
position. The generator set should start.
8. When loads are ready to be energized, close circuit
breakers or switches leading to the transfer switch.
Note: When applying power to the transfer switch
whose electrical controls have lost power,
the engine-start contact remains closed and
the engine start LED stays off, signaling the
generator to run at least until the ATS’s time
delay engine cooldown (TDEC) ends.
9. Perform an automatic operation test. With normal
power present, disconnect the normal power
source and verify that the system responds as
described in Section 2.2.1, starting the generator
set automatically and transferring the load to the
emergency power source. When the transfer
switch has transferred the load to the emergency
source, reconnect the normal power source and
verify that the system operates as described in
Section 2.2.2, retransferring the load to the normal
source and shutting down the generator set after
TDEC.
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