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Bypass Overview
3 3 . . 6 6
B B y y p p a a s s s s O O v v e e r r v v i i e e w w
The BPM has three operating positions (see
BPM when protecting your critical loads.
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
The BPM consists of a load position handle and a red button (see
Figure 26. Bypass Switch Positions
The red button:
•
Sends an electrical signal to the UPS to switch to the Bypass Mode (if it is not already operating in that
mode ).
•
Operates a mechanical interlock, to prevent the switch from being turned without first signaling the UPS.
You must press the red button before you can turn the load position handle.
When the red button is pressed, the UPS front panel displays "Bypass Mode." To move the MBP switch
handle from one position to another, the red button must be pressed WHILE the handle is being rotated.
Otherwise, the switch will be damaged.
The bypass switch has three positions as described in
28
4–20kVA Users Guide P-164000669 4–20kVA Users Guide P-164000669—Rev 10
Table 3
" ).
LOTO Bar (red)
Interlock Button (red)
). Consider both the operating state of the UPS and the
Figure 26
).
Bypass switch
handle
Table 3
.
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