Introduction And System Description; System Description; Figure 1 Ups Mode Of Operation; Figure 2 Mains/Maintenance Bypass Mode - Liebert 2U User Manual

INTRODUCTION AND SYSTEM DESCRIPTION

Congratulations on your choice of the Liebert 2U POD
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
Mains
• 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.
CAUTION
!
Battery back-up and conditioned power are NOT available
during the MAINS mode of operation.
Figure 2 MAINS/maintenance bypass mode
Mains
• The UPS may be turned off and removed without affecting the load. See Figure 3.
Figure 3 2U POD connections
UPS INPUT
Connect to load socket on
rear of UPS. Cable supplied.
10A
UPS
Connect loads.
POD
UPS
POD
UPS
Rotary switch
and power
indicator lamps.
AVAILABLE
10A
A
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
™
. The Liebert 2U POD provides main-
Connected
loads
Connected
loads
MAINS INPUT
Connect to mains wall socket. Use
original UPS mains input cord.
UPS MAINTENANCE BYPASS
AVAILABLE
CIRCUIT BREAKER
16A 250V-/T
UPS MAINS
CONNECT UPS LINE CORD HERE
Connect UPS
input cord here.
Cable supplied.
3
10A
B
MAINS
Connect loads.