INSTALLATION (continued)
1 --- 3
1 – Manual Operation Test
A detachable maintenance handle is provided on the frame
of the Transfer Switch for maintenance purposes only.
Manual operation of the transfer switch should be
checked before it is energized (operated electrically).
Do not manually operate the transfer switch
until both power sources are disconnected:
open both circuit breakers.
!
1. After deenergizing both power sources, open the
enclosuredoor. Locate and remove the maintenance
handle from the clips on the left side of the transfer
switch frame. Insert the handle into the hole in the
molded hub on the left side of the operator. See
Figures 1–3 through 1–5 and TableB.
2. Move the maintenance handle up or down as shown
tomanually operate the transfer switch. The transfer
switchshould operate smoothlywithout binding. If it
does not, check for shipping damage or construction
debris.Operate both upper and lower contactshafts.
3. Return the transfer switch to the Normal position.
Observe that the window indicators (right side) show
the upper shaft O(Emergency open) and the lower
shaft C(Normal closed). Remove the maintenance
handle and storeit on the frame in the clips provided.
TableB. Maintenance handle positions.
ATS Position Handle Indicators
N
o
r
a
l
E
up
E=O
uppercontacts open
N
orma
l
N
up N=C
lowercontacts closed
E
e
r
g
e
n
c
y
E
down
E=C
uppercontacts closed
E
mergency
N
down
N=O
lowercontacts open
Note: If Normal and Emergency connections are
reversed this operation is also reversed.
Now continue to 2–Voltage Checks on the next page.
maintenance
handle
left side of
transfer switch
clip
Emergency source
contact shaft hub
Normal source
contact shaft hub
Figure 1-3. Maintenance handle storage location.
HubsshownwithNormalclosed&Emergencyopen.
handle
hub
UP opens the
Emergency source
contacts
DOWN closes the
Emergency source
contacts
frame
UPPER SHAFT
Figure 1-4. Emergency (upper shaft) operation.
handle
hub
UP closes the
Normal source
contacts
DOWN opens the
Normal source
contacts
frame
LOWER SH AFT
Figure 1-5. Normal (lower shaft) operation.