24 Chapter 2 Installation Of UPS Rack System And Parallel System
Chapter 3 Installation Of a Parallel USP Rack System
3.1 Overview
The single or parallel system should be installed according to the installation procedures of the UPS rack module
system and the requirements in this Chapter.
For single UPS rack system installation the EPO button on the front panel of the UPS rack controls the emergency
stop of UPS modules and bypass static switch and also supports remote emergency power off function that can be
used to shut down the UPS rack remotely.
Note
1. The remote EPO switch must provide normally open or normally closed dry contact signals.
2. Normally closed EPO-J10 terminals: Pin 1 and pin 2 have been connected in factory and located on the parallel signal board X2.
UPS1
UPS 1
J10
:
3
J10
:
4
1
:
3
:
4
UPS dry contact and
parallel signal board X2
UPS 2
J10
:
3
J10
:
4
:
3
:
4
UPS dry contact and
parallel signal board X2
J10
:
3
J10
:
4
:
3
:
4
UPS dry contact and
parallel signal board X2
Fig.
3-1
: Circuit ram of emergency power off
3.2 UPS Rack Systems In Parallel System
The basic installation procedures of parallel system are the same like those of the UPS rack module system. In this
section only the installation procedures related to the parallel system are introduced.
3.2.1 Installation Of Cabinet
To make the maintenance and system test easier, an external maintenance bypass is recommended in the
installation.
Summary of Contents for Liebert APM
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