Vertiv Liebert EXS 80kVA UPS, Руководство пользователя

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Vertiv™ Liebert EXS 80kVA UPS User Manual
6 Parallel System and LBS System
6.4.7. 6.4.7 Procedures for Completely Powering down UPS
Complete UPS shutdown and load power-off should follow this procedure. All power switches, isolating
switches and breakers are disconnected, and then UPS no longer supplies power to the load.
CAUTION:The following procedures will cut off the load power, making the load completely
power off.
1. Press the remote EPO button of each UPS for 2s (if any), or unplug the EPO terminal of each UPS to
stop the operation of all the rectifiers, inverters, bypasses and batteries.
2. If the UPS is equipped with an external battery, set the corresponding external battery switch to off.
3. Disconnect the main input switch Q1, bypass input switch Q2, output switch Q5 of each UPS. At the
moment, all the internal power supply is closed and the LCD does not display any more.
WARNING! Hazardous battery voltage
The battery terminals still have hazardous voltage after the UPS complete shutdown.
6.4.8. Procedures for Complete UPS Shutdown while Maintaining Power
to Load
The following procedures are applicable for completely powering down the UPS and still keeping the
power supply to the load. Refer to the procedures in 6.4.4. Maintenance Bypass Procedures .
6.5 LBS System
6.5.1. Overview
An LBS system consists of two independent UPS systems, each containing one or more parallel UPS
modules. The LBS system has high reliability and is applicable to the load with multiple inputs. For single-
input load, an STS can be installed to feed power to the load.
6.5.2. Cabinet Installation
The system uses the LBS cables to keep the output of the two independent (or parallel) UPS systems
in synchronization. One system is designated as the master, the other is designated as the slave. The
operation modes of the parallel system comprise master and/or slave operation in normal or bypass mode.
Refer to Figure 6-4 and Figure 6-5 for details.