Introduction; Installation - Liebert 7400 Series User Manual

7400 Series UPS User Manual
Single Module and One plus One Systems
Option Board Kit (Part no. 77000005)
4.10
4.10.1

Introduction

4.10.2

Installation

6310018a.02.doc
This kit is intended for use in to any Series 7400 UPS fitted with the
appropriate Rectifier Logic Board (part no. 4520073Z). The kit provides
the following facilities:
p
Battery temperature compensation:
With this feature fitted and enabled the nominal float voltage
supplied to the battery is adjusted so as to be inversely proportional
to the ambient battery cabinet/room temperature ( as monitored by a
remote temperature sensor ). This prevents the battery being over
charged at high ambient temperatures.
Example: - the d.c. float voltage is reduced by 1.5V d.c. per oC rise
in battery Temperature from 25oC to 35oC.
p
Reduced input current limit:
This facility allows the UPS input current limit to be reduced to a
predetermined level. This may be necessary when running the UPS
on a standby generator. The system is activated by the closure of a
normally open contact. The input current limit can be reduced from
115% to 50% of nominal.
p
Reduced battery current limit
This facility allows the UPS battery current limit ( i.e. the magnitude
of the battery charging current) to be reduced to a preset value. This
may advisable if the battery cabinet/room ventilation system failed.
The system is activated by the closure of a normally open contact.
The battery current limit can be reduced from 100% to 10% of its
initial setting.
Unpack the kit carefully and examine the parts for any signs of transit
damage . Check that the following items are included in the kit:
1 77000002
1 83696005
4 49030060
Fit the supplied equipment as follows:
1. If the module is operating and on load, transfer the load to bypass
and open the input isolator (I1) following the instructions in chapter
2 of this manual.
2. Locate onto the plastic stand-offs and secure the option board into
position as shown in figure 4-16 using the screws provided.
3. Fit links into position on the option board for the features required.
See table 1 for enabling link positions
4. Connect 10 way ribbon cable between PL1 on the option board and
connection CNx on the Rectifier Logic board following existing
cable routes.
5. The remote temperature sensor required for the battery temperature
compensation feature should be located in such a position so as to
monitor the ambient air temperature of the battery bank. It is
recommended that the remote sensor is connected to the option
board using a twisted pair (1-2 mm
Chapter 4 - Optional equipment
Option Board Kit (Part no. 77000005)
:
PCA Option board.
Temperature sensor kit.
Screws (M3 x 6).
2
) of maximum length 25m.
4-29
Issue 2
(02/98) LCA 10/01