Bypass Switch Operation - Eaton Powerware 9170+ UPS 3–18 kVA User Manual

Table 3. Bypass Switch Positions
Switch Position Description
LINE Connects the load directly to AC input power and disconnects UPS output. AC input power is
still connected to the UPS input.
OFF Disconnects the load from the UPS output power and AC input power, as well as AC input
power to the UPS input.
UPS Connects the UPS output to the load.
SERVICE Like the LINE position, SERVICE connects the load directly to AC input power and disconnects
UPS output. However, because SERVICE also disconnects AC input from the UPS, this is
the appropriate position for UPS maintenance or repair.
Eaton 9170
NOTE In the UPS or LINE position, AC input power is still connected to the input terminals
inside the UPS.

Bypass Switch Operation

The bypass switch consists of a load position handle and a red button
(see Figure 13).
The red button:
S
Sends an electrical signal to the UPS to switch to the internal Bypass
mode (if it is not already operating in that mode).
S
Operates a mechanical interlock, to prevent the switch from being
turned without first signaling the UPS.
For MBB switches, 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 "Manual
Bypass." The load position handle can now be turned from the UPS to
LINE position or from the LINE to UPS position.
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UPS (3–18 kVA) User's Guide
UPS WITH BYPASS ELECTRICAL INSTALLATION
S 164201393 Rev E www.eaton.com/powerquality 23