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Figure 29. LOTO Feature
2.
Install a lock and tag in any opening at the base of the switch according to LOTO procedures.
3.
Remove the lock and tag to reset the LOTO position.
3 3 . . 9 9
N N o o B B r r e e a a k k T T r r a a n n s s f f e e r r f f r r o o m m S S e e r r v v i i c c e e B B y y p p a a s s s s t t o o U U P P S S M M o o d d e e
After the system has been placed into SERVICE mode, it must be returned to UPS state to resume Normal
operation.
Failure to understand the correct bypass sequence and position may cause the critical load to be dropped.
Damage to the power modules or the Bypass switch can occur.
•
If the UPS remains in Bypass Mode and incoming AC power is lost, the load is automatically dropped. The
UPS must be in Normal Mode to provide battery backup power.
•
In the UPS or LINE position, AC input power is still connected to the input terminals inside the UPS.
•
If the UPS is in the standby mode and the bypass switch is in the LINE or UPS positions pressing
the red bypass switch interlock button will energize the UPS output.
•
Do not attempt to push the red interlock button or attempt to move the bypass switch handle if the
UPS is operating on battery power.
•
If you have any questions or problems with the bypass operation, call the Help Desk (see , "
11.2 Service and Support
To turn the BPM to UPS Mode:
1.
Turn the switch from SERVICE to LINE (see
Depress and HOLD
red bar
Install lock and tag
in any opening at
the base of switch
" ).
4–20kVA Users Guide P-164000669 4–20kVA Users Guide P-164000669—Rev 10
No Break Transfer from Service Bypass to UPS Mode
Remove Lock and
Tag to reset
LOTO position
Figure 30
).
31
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