72 Chapter 5 UPS Operation Introduction
Liebert EXM 80kVA ~ 200kVA UPS User Manual
Chapter 5
UPS Operation Introduction
This chapter introduces the operating precautions and routine operating methods of UPS single module
in detail. For the operating precautions and routine operating methods of UPS parallel system, refer to
Chapter 7 for details.
5.1
Brief Introduction
5.1.1
Precautions
Important
The user can conduct relative operation only after the authorized engineer carries out the first power on and test.
Warning: hazardous mains and/or battery voltage
1. No operator-serviceable parts are located behind covers that require a tool for their removal. Only qualified service
personnel are authorized to remove such covers.
2. The AC/DC input and output terminals of UPS have dangerous voltage at any time. If the cabinet is equipped with
an EMC filter, the filter may have dangerous voltage.
1. For the operation keys and TOUCHSCREEN related to all the operating steps, refer to
Chapter 4
Operator Control And Display Panel.
2. During operation, the buzzer alarm may occur at any time. Silence the audible alarm through the
touchscreen.
3. When UPS uses traditional lead-acid battery, the system provides boost charge optional function. If the
lead-acid battery is used, when the mains returns after an extended mains failure, the charging voltage of
the battery will be higher than the normal charging voltage, this is normal, and the charging voltage of the
battery will return to normal value after a few hours' charging.
5.1.2
Power Switch
Opening the front door of the UPS cabinet reveals the power switches, as shown in Figure 5-1, including:
Q1: Rectifier input switch, which connects UPS to the main circuit power.
Q2: Bypass input switch, which connects UPS to the bypass.
Q3: Maintenance bypass switch (lockable), which supplies power to the load when UPS is being
maintained.
Note: If the UPS system is composed of more than two paralleled UPS modules, do not use the
internal maintenance bypass switch.
Q5: Output switch, which connects UPS output to the load.
Note
Q1, Q2, and Q5 are optional.
Summary of Contents for EXM 0080kTK16FN01000
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