TP-6322 9/04 5Section 2 Operation
contactor mechanism’s inertia carries it through the top
of the cycle and into the normal position. The contactor
is mechanically latched in the normal position until the
next normal power source failure. The controller starts a
time delay called time delay engine cooldown (TDEC).
TDEC allows the engine and generator to run unloaded
and cool down before shutdown. When TDEC ends, the
controller signals the generator set to shut down by
opening the engine-start contact between terminals
ES3 and ES4 and the ES LED on the main controller
circuit board lights. When the generator set shuts down,
the EA LED turns off.
2.3 Exerciser Function
The exerciser function, when enabled, automatically
starts and runs the generator set unloaded (the ATS
does not transfer the load to the emergency source) for
20 minutes once a week. Exercising the generator set
helps to ensure that the generator set starts when
emergency power is needed. An exerciser switch
selects exerciser functions. Automatic operation
overrides the exerciser function. The loss of all power
sources for more than 90 seconds will result in the loss
of the exerciser set time. See Section 2.3.2.
2.3.1 Exerciser Switch
An exerciser switch is located inside the ATS enclosure.
See Figure 1-1 and Figure 2-2.
5990202
EXERCISER
1 2
3
4
1. Exerciser switch
2. Set position (momentary, up)
3. Disable position (down)
4. Enable position (middle)
Figure 2-2 Exerciser Switch
Hazardous voltage.
Will cause severe injury or death.
Only authorized personnel should
open the enclosure.
DANGER
Short circuits. Hazardous voltage/current can cause
severe injury or death. Short circuits can cause bodily injury
and/or equipment damage . Do not contact electrical
connections with tools or jewelry while making adjustments or
repairs. Remove all jewelry before servicing the equipment.
Note: The exerciser switch is set during installation and
normally does not require adjustment. Line
voltage is present on some components inside
the ATS enclosure when power sources are
applied. Only trained and qualified personnel
should open the ATS enclosure when power is
present. Read and follow all safety decals inside
the enclosure and avoid contact with line voltage.
The exerciser switch selects the following exerciser
functions when power is available. See Section 2.3.2.
D Set ( ). Placing the switch in the momentary
(spring-loaded) set position and releasing the switch
to the run position sets the exerciser: the exerciser’s
internal one-week timer is set and the exerciser starts
and runs the generator set for a 20-minute period.
Subsequent weekly 20-minute exercise periods start
at the same day and time the exerciser was released
from the set position.
D Enable ( ). Placing the switch is the enable position
causes the exerciser to start and run the generator set
unloaded for 20 minutes on the s ame day and time
each week the exerciser was last set.
D Disable ( ). Placing the switch in the disable
position prevents the exerciser from starting and
running the generator. The exerciser’s internal
one-week timer continues to run and the exerciser’s
set day and time are not lost. The ATS, however,
To Next Page
Loading...
Need help?
General
