64 Chapter 8 Option
Liebert APM 90 Integrated Modular UPS User Manual
8.2.10
Basic Unit For Common Distribution
The basic unit for common distribution connects the UPS output busbar to the output distribution module to
achieve common load power distribution function. It does not provide branch circuit monitoring or intelligent
monitoring or management of various power data. The basic unit for common distribution is installed in
factory. It is used with the non-intelligent MCB distribution module or the non-intelligent hot-pluggable MCB
distribution module.
8.2.11
Output Distribution Module
The UPS provides four types of optional output distribution module for your selection: intelligent MCB
distribution module, intelligent hot-pluggable MCB distribution module, non-intelligent MCB distribution
module, non-intelligent hot-pluggable MCB distribution module. The electrical connection of the output
distribution modules in the UPS system is shown in Figure 8-14.
Maximally five
power modules
Inverter
Output
switch Q3
Inverter
Input
switch Q1
AC input 380V
Static switch
Battery input
Rectifier
Rectifier
Maintenance switch Q2
QF18
QF1
Output distribution
module 1
QF18
QF1
QF18
QF1
Output distribution
module 2
Output distribution
module 3
Figure 8-14
Electrical connection between output distribution module and UPS
The maximum configuration number of the former two types is three, and that of the latter two is four.
The intelligent MCB distribution module and intelligent hot-pluggable MCB distribution module are used with
the SPM monitoring module to achieve intelligent power distribution and management function.
The non-intelligent MCB distribution module and non-intelligent hot-pluggable MCB distribution module are
used with the basic unit for common distribution to achieve common power distribution function, with no
distribution circuit monitoring or intelligent management.
The installation and service procedures of the four output distribution modules are the same. Refer to
2.4.6
Installing Power Module And Output Distribution Module
and
10.4.3 Service Procedures Of Output Distribution
Module
.
Intelligent MCB distribution module
The intelligent MCB distribution module uses hot-pluggable terminals to connect the UPS output busbar to
facilitate installation. The intelligent MCB distribution module in standard configuration provides eighteen
25A/1P MCBs and provides 18 branches of built-in current detection components and switch state monitoring
circuit to acquire and report the current, voltage and state of each MCB.
Intelligent hot-pluggable MCB distribution module
Except that the built-in MCBs are hot-pluggable, the intelligent hot-pluggable MCB distribution module is
completely the same as the intelligent MCB distribution module.
The intelligent hot-pluggable MCB distribution module uses built-in hot-pluggable MCBs. Therefore, with no
need to turn off the whole distribution module, you can regulate the phases of each MCB or replace each MCB
to adjust the branch capacity. Hence, load distribution can be adjusted in equipment operation.
