Cutler-Hammer ATVISPE31000XSU, Инструкция по эксплуатации

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I.B. ATS-SD02
Page 26
Effective 5/98
circuits automatically initiate an immediate transfer of
power from the normal to the emergency source when
the power source fails or the voltage level drops below a
preset value. Transfer back to the normal power source
is automatic upon return of the normal power source.
Monitoring the power source is always performed on the
line side of the power source to which the switch is con-
nected. The normal power source is the preferred
source and the transfer switch will always seek this
source when it is available.
7.3 BYPASSING THE TRANSFER SWITCH
7.3.1 NORMAL TO NORMAL BYPASS
The normal switching device can be bypassed and iso-
lated by the following sequence (Figure 7-2):
1. Move the generator selector switch to the OFF posi-
tion to avoid nuisance starts.
2. Remove the key from the emergency switching
device by turning it counterclockwise while pushing
up on the lever next to the key interlock. This will
lock the emergency switching device to prevent it
from closing.
3. Insert the key in the normal bypass switching device
and turn it clockwise, which will release the lever to
the left of the key interlock. This will unlock the nor-
mal bypass switching device.
4. Close the normal bypass switch manually. The nor-
mal bypassed light will illuminate.
5. Open and rack out the normal switching device (see
Section 6). The normal isolated light will illuminate.
The normal position energized light will no longer be
illuminated.
6. Inspect and/or perform maintenance on the
normal switching device.
7. Rack in the normal switching device (see Section 6).
The normal switching device will automatically
recharge and close when it is in the CONNECT
position. The normal isolated light will no longer be
illuminated, but the NORMAL position energized
light will be illuminated.
8. Open the normal bypass switch. The normal
bypassed light will no longer be illuminated.
9. Remove the key from the normal bypass switch by
turning the key counterclockwise while pushing up
on the lever next to the key interlock. This will lock
the normal bypass switch to prevent it from closing.
10. Insert the key in the emergency switch and turn the
key clockwise, which will release the lever to the left
of the key interlock. This will unlock the emergency
switching device.
11. The normal switching device is now back in auto
matic operation.
7.3.2 EMERGENCY TO EMERGENCY BYPASS
The emergency switching device can be bypassed and
isolated by the following sequence:
1. Move the generator selector switch to the RUN posi-
tion to avoid loosing power.
2. Remove the key from the normal switching device
by turning the key counterclockwise while pushing
up on the lever next to the key interlock. This will
lock the normal switching device and prevent it from
closing.
3. Insert the key in the emergency bypass switching
device and turn the key clockwise to release the
lever to the left of the key interlock. This will unlock
the emergency bypass switching device
4. Close the emergency bypass switching device man-
ually. The emergency bypass light will illuminate.
5. Open and rack out the emergency switching device
(see Section 6). The emergency isolated light will
illuminate, and the emergency position energized
light will no longer be illuminated.
6. Inspect and/or perform maintenance on the emer-
gency switching device.
7. Rack in the emergency switching device (see
Section 6). The emergency switching device will
automatically recharge and close when in the CON-
NECT position. The emergency isolated light will no
longer be illuminated, and the emergency position
energized light will illuminate.
8. Open the emergency bypass switch. The emer-
gency bypassed light will no longer be illuminated.
9. Remove the key from the emergency bypass switch
by turning the key counterclockwise while pushing up
on the lever next to the key interlock. This will lock the
emergency bypass switch and prevent it from closing.