TP-6835 9/17 57Section 7 Bypass, Isolation, and Manual Transfer
Right rail
Left rail
Tab handles
Figure 7-19 Transfer Switch Isolated and Pulled
Out for Inspection (standard-transition
model)
Right rail
Left rail
Tab
handles
Figure 7-20 Transfer Switch Isolated and Pulled
Out for Inspection (programmed- or
closed- transition model)
7.2.3 Return to Service,
150--600 Amp Mo dels
This procedure explains how to return the automatic
transfer switch (ATS) to service after inspection and
maintenance. Observe the bypass switch position
indicator and lights.
1. Use the two handles to roll the transfer switch into
the enclosure (isolation contacts facing inward)
until its crank pins engage the latch plates on both
sides. See Figure 7-19 or Figure 7-20. Next push
in both side rails and close the enclosure door.
E
L
N
Turn crank
clockwise
until
window
shows
TEST.
Automatic Transfer Switch
Bypass Switch
TS CONNECTED
Middle amber light
should come on.
TS TEST
TS ISOLATED
Figure 7-21 From ISOLATE to TEST Position
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