Kohler KGS - Bypassing and Isolating, 600- to 1200-Amp Switches

TP-6836 4/14 51Section 7 Bypass/Isolation
7.5 Bypassing and Isolating,
600- to 1200-Amp Switches
See Figure 7-7. Also see the notes after this procedure.
Hazardous voltage.
Will cause severe injury or death.
Only authorized personnel should
open the enclosure.
DANGER
Removing the transfer switch from bypass/isolation
models. Hazardous voltage can cause severe injury or
death. Bypass and isolate the transfer switch before removing
it from the enclosure. The bypass/isolation switch is
energized. Do not touch the isolation contact fingers or the
control circuit terminals.
1. Check that the ATS is in Automatic Mode:
a. The manual bypass handle is in the OPEN
position.
b. The disconnect switch is in the AUTO position.
c. The ATS is supplying the load.
5
1
2
3
4
566532
1. Bypass selector switch
2. Manual bypass handle BYPASS POSITION
3. Manual bypass handle OPEN POSITION
4. Crank mechanism
5. Disconnect s witch
Figure 7-7 Bypass Switch Crank Mechanism
Location, 600--1200 Amp Switches
2. Bypassing the ATS:
a. Open the bottom cabinet door and turn the
disconnect switch to the INHIBIT position.
b. Position the bypass-selector switch to the
same power source as the ATS.
Note: The bypass switch uses safety interlocks to
prevent cross phasing.
c. Move the manual-bypass handle to the
BYPASS POSITION.
3. Testing the ATS:
a. Bypass the ATS as described in step 2.
b. Rotate the crank mechanism counterclockwise
until the ATS location pointer is aligned with
test; the ATS TEST position lamp will
illuminate.
c. Turn the disconnect switch to the AUTO
position.
d. Run an automatic operation test as described
in Section 6.5. End the test before proceeding.
4. Isolating the ATS:
a. Bypass the ATS as described in step 2.
b. Rotate the crank mechanism counterclockwise
until the ATS location pointer is aligned with
isolate; the ATS ISOLATE position lamp will
illuminate.
5. Removing the ATS:
a. Bypass and isolate the ATS as described in the
previous steps.
b. Disconnect the multipin plugs and external
connections from the ATS.
c. Rotate the four panel latches to the vertical
position.
d. Slide the ATS forward and lock the mechanism
into place.
e. The ATS can now be removed from the cabinet.
6. Reconnecting the ATS:
a. Place the ATS on the slide mechanism.
b. Unlock the slide mechanism.
c. Slide the ATS over the power panel latches and
rotate the latches to the horizontal position.
d. Turn the disconnect switch to the INHIBIT
position.
e. Manually operate the ATS to the same position
as the bypass switch.
f. Reconnect the multipin harness plugs and
external connections to the ATS.
g. Rotate the crank mechanism clockwise until
the ATS TEST light is illuminated.
h. Turn the disconnect switch to AUTO.
i. Run an automatic operation test as described
in Section 6.5. End the test before proceeding.