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User Manual 10H52260UM60 - Rev. 1 - 10/2017
Procedures For Completely Powering Down the UPS
In order to shut the UPS down completely and disconnect the power supply to the load, proceed as follows: All
power switches, isolating switches and breakers are switched to off, and the UPS no longer supplies power to the
load.
Caution
The following procedures will interrupt the power supply to the load, switching it off.
1. Unplug the REPO terminal on each UPS to deactivate the rectifier, inverter, static switch and battery.
2. If the UPS is equipped with an external battery, set the corresponding external battery switch to the off position
until all the UPS modules have been disconnected from the batteries.
3. Set the rectifier input switch Q1 and bypass input switch Q2 on each UPS to off. At this point, all the internal
power supplies are deactivated and the LCD screen is switched off.
4. Set the output switch Q5 on each UPS to off.
5. If the UPS his equipped with internal batteries, be sure to open the connection between the UPS and internal
batteries.
Warning
1. Post a label on the AC input distribution line (generally at a distance from the UPS) to alert personnel that UPS maintenance
is in progress.
2. Wait 10 minutes for the internal DC bus capacitors to discharge. Then the UPS is completely shut down.
Warning: hazardous battery voltage
Hazardous voltages are still present on the battery terminals, even after the UPS has been shut down.
Procedures for Shutting Down the UPS Completely While Maintaining Power to the Load
The following procedures may be used to shut the UPS down completely are applicable for completely, while
maintaining the power supply to the load. Refer to the procedures in 7.3.2 .
7.4
LBS System
Cabinet Installation
An LBS system consists of two independent UPS systems, each consisting of two parallel UPS modules, as shown in
Figure 7-3. The LBS system provides high reliability, which makes it suitable for use with loads having multiple input
terminals. In the case of single-input loads, an STS may be installed to power the load.
The system uses the LBS cables to synchronise the outputs of two independent (or parallel) UPS systems.
Place the UPS modules side by side and interconnect the UPS modules according to the following instructions.
