User`s guide

BYPASSING & ISOLATING
(continued)
Installation ManualASCO G, Q, S, U 7ATB, 7ACTB, 7ADTB
p a g e 3 --- 5381333–415 A ASCO Power Technologies
RETURN TO SERVICE continued*
This proc edu re explains how to return the Bypass Switc h
HandletotheOPENposition. TheBypassHandlemust
be in the CLOSED position (yello w indicator on NORMAL
or EMERGENCY) and the Isolation Handl e mus t be in the
TEST position (window). If the handles are not in these
positions, refer to Return to Service on page 3–3. See
Figures 3–11, 3–12, and 3–13.
NOTICE
Youcanonlybypasstothesamesourcethatthe
ATS is connected. Solenoid interlock prevents
incorrect operation.
1 Observe which Bypass Switch Position indicator is
yellow (NORMAL or EMERGENCY)attheBypass
Switch Handle. This indicates the source connected
to the load.
2 Un–Bypass to same source as the Bypass Switch
Position
as follows (select Normal or Emergency).
To un–Bypass Normal push in handle
all the wa y & turn it counterclockwise.*
To un–Bypass Emergency pull out
handle all the way & turn it
counterclockwise.*
Indicator shows:
green

OPEN when the
ATS is not
bypassed.
Indicator shows:
yellow

EMERGENCY CLOSED
when ATS is bypassed to Emergency
or
yellow

NORMAL when ATS is
bypassed to Normal Source.
Figure 3–11. Bypass Handle and position indicators.
To Un–Bypass Normal Source*
(Load connected to Normal Source)
The Transfer Switch Connected To Normal light is on and
Transfer Switch Connected To Emergency light i s off.
Push in
* the Bypass Handle then turn it counterclockwise
until Bypass Switch Position shows OPEN (green i ndicator).
The Unit Not in Automatic light should be off.
E
L
N
Push in
Bypass
Handle
&
turn it
counter-
clockwise.
ATS
Bypass Switch
Figure 3–12. Un–Bypass Normal.
To Un–Bypass Emergency Source*
(Load connected to Emergency Source)
The Transfer Switch Connected To Emergency light is on
and Transfer Switch Connected To Normal light is off.
Pull out
* the Bypass Handle then turn it counterclockwise
until Bypass Switch Position shows OPEN (green i ndicator).
The Unit Not in Automatic light should be off.
E
L
N
ATS
Bypass Switch
Pull out
Bypass
Handle
&
turn it
counter-
clockwise.
Figure 3–13. Un–Bypass Emergency.
The Automatic Closed–Transition Transfer & Bypass–Isolation Switch should be left in this position.
*NOTICE
When Accessory 40*B (reversed Normal & Emergency connections) is specified, the handle push–pull
operation is reversed. Follow instructions on the door.