Liebert 2U - Manual (Page 7)

3
INTRODUCTION AND SYSTEM DESCRIPTION
Congratulations on your choice of the Liebert 2U POD ™ . The Liebert 2U POD provides main-
tenance bypass capability as well as power output distribution. The Liebert 2U POD can be
used on UPSs in the rack mount or tower configuration.
The Liebert 2U POD provides an isolated path of power for your UPS system for preventive
maintenance or service.
System Description
The 2U POD has two modes of operation: UPS (UPS available) and MAINS (maintenance
bypass).
• In UPS mode, the power is routed through the UPS system delivering conditioned power
to the load, as shown in Figure 1.
Figure 1 UPS mode of operation
• In MAINS mode, the power is routed around (bypassing) the UPS system (see Figure 2).
Mains power is supplied directly to the load through the 2U POD.
Figure 2 MAINS/maintenance bypass mode
• The UPS may be turned off and removed without affecting the load. See Figure 3.
Figure 3 2U POD connections
!
CAUTION
Battery back-up and conditioned power are NOT available
during the MAINS mode of operation.
Mains
POD
UPS
Connected
loads
Mains
Connected
loads
POD
UPS
MAINS
B A
UPS
UPS
AVAILABLE
UPS MAINS
CONNECT UPS LINE CORD HERE
MAINTENANCE BYPASS
AVAILABLE
CIRCUIT BREAKER
16A 250V-/T 10A 10A 10A
CAUTION
IF MAINS LAMP IS ILLUMINATED
MAINTENANCE BYPASS POSITION
MAY BE SELECTED.
SWITCH TO UPS POSITION ONLY
WHEN UPS LAMP IS ILLUMINATED.
A+B MAX. 16A
UPS INPUT
Connect to load socket on
rear of UPS. Cable supplied.
Rotary switch
and power
indicator lamps.
MAINS INPUT
Connect to mains wall socket. Use
original UPS mains input cord.
Connect UPS
input cord here.
Cable supplied. Connect loads. Connect loads.