Emerson Liebert NXL 250 kVA - Figure 43 1+N System Transfer Menu Commands; Load Transfer-1+N System: Transfer System to Bypass; Load Transfer-1+N System: Transfer System to Inverter

Operation
Liebert
®
NXL
™
44
2.15.10 Load Transfer—1+N System: Transfer System to Bypass
1. Under the “Transfer” menu button on the touchscreen, press the “All Modules” menu button. The
Transfer/Retransfer screen will appear in the multipurpose window (see Figure 43).
2. If the UPS outputs are synchronized with their bypass, press the “1+N Bypass” button. This will
turn On all available static switches and open CB2 in all the modules.
Figure 43 1+N System Transfer menu commands
2.15.11 Load Transfer—1+N System: Transfer System to Inverter
1. Verify that all the UPS units are On and the Inverters are in standby mode (See 2.15.3 -
Startup—1+N System.)
2. Under the “Transfer” menu button on the touchscreen, press the “All Modules” menu button. The
Transfer/Retransfer screen will appear in the multipurpose window (see Figure 41).
3. Press “1+N UPS” button. This will close CB2 and open the Bypass Static Switch in all the
modules.
NOTE
If this UPS is not part of the collective, then the “1+N Bypass” will not be activated.
NOTE
The load will now be on Static Bypass in each UPS. It is no longer protected by the UPS.
NOTE
If the UPS is not synchronized with the other units in the system, then the “1+N UPS” will not
be activated.