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Emerson 7ADTB Manual del operador Pagina 15

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BYPASSING & ISOLATING
(continued)
3 --- 6
TS CONNECTED
Middle amber light
should come on.
TS TEST
TS ISOLATED
position
window
TEST
clockwise – draws in
the transfer switch
Figure 3–19. Isolation Handle turned to TEST.
3. The ATS can be t ested now without load interruption
(see page 2–1).
Solenoid interlock prevents you from closing
the isolation contacts until the ATS is in the
same
position as the Bypass Switch.
4. Observe which Bypass Switch Position window indica-
tor is yellow (NORMAL or EMERGENCY)atthe
Bypass Switch Handle. This indicates the source
connected to the load.
5. Observe which Transfer Switch Connected To light is
on (Normal or Emergency) o n the door. This is t he
positionof the TransferSwi tch. If it is not
in thesame
position as the Bypass Handle change the position of
the Transfer Switch as follows:
To change the position of transfer switch
Operate to NORMAL Operate to EMERGENCY
Turn Transf er Contro l
switch to Retransfer
Delay Bypass.
Turn Transf er Contro l
switch to Transfer Test
(hold 15 seconds).*
Connected To Normal
light should come on.
Connected To Emergency
light should comes on.
* If Feature 2B time delay is used, there will be a delay
before transfer to Emergency.
NOTE: With Normal available, the automatic transfer
switch will not st ay in the emergency position unless
Feature 3A time delay is used (at least 30 seconds).
Do not close the isolation contacts unless
the Transfer Switch (ATS) and Bypass
Switch a re in the same position!
6. When the transfer switch is in the same
position as
the Bypass Switch handle, continue turning the
Isolation Handle clockwise (about 8 turns) until the
window shows CONN (connected).
E
L
N
Automatic Transfer Switch
Bypass Switch
Turn crank
clockwise
until
window
shows
TEST.
Figure 3–20. TEST to CONN (connected) position.
TS CONNECTED
Upper amber light
should be on.
TS TEST
TS ISOLATED
position
window
CONN
clockwise – draws in
the transfer switch
CONN
Figure 3–21. Isolation Handle turned to CONN.
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