OPERATING MODES Liebert Trinergy™ Cube
User Manual - 10H52243UM60 - rev. 6 - 12/2020 Page 9
Maintenance bypass
In this operating mode, the connected loads are supplied directly with line power. The touch screen is
disabled.
Maintenance bypass is used to supply connected loads during maintenance work on the UPS (see Fig. 5
- on page 9).
Figure 5 - Power flow during service bypass operation
2.2. Special features
2.2.1. Smart safe and reliable operation
• Three operating modes (see para. 2.1 on page 7) that can be selected to suit the type of load being
supplied, the required level of efficiency, and the quality of line power
• Important features of the UPS, such as vector control and high flexibility, are supported by the
DSP board
• The UPS adopts the smart power capacity: maximum available output power limit is dynamically
set based on at least one temperature experienced by the uninterruptible power supply system. In
one aspect, the temperature is ambient temperature of the area in which the uninterruptible power
supply system is located. This temperature is used as a control parameter to set the maximum
available output power limit. Dynamically set means that the temperature is being used as the
control parameter. The maximum available output power limit is changed accordingly when the
control parameter changes
• Static bypass switch increases the reliability of electrical supply
2.2.2. Easy installation and operation
• Parameterization using bundled PC software
• Operator is not required during normal operation
• Simple touch screen provides clear indication of status, load and battery quality. The concept
behind the display and the way the display operates are easy to understand
• Event memory for fault analysis
• Fault display and audible signal
2.2.3. Battery management
• Automatic battery management for maximum battery life
• Automatic battery circuit test
• Temperature-dependent charging
2.2.4. Environment, EMC
• The EMC limits values to comply with European regulations and standards
• Energy savings due to high efficiency
• Low noise level
Warning
To avoid overheating inside the UPS, do not operate the unit for extended periods with the
rectifier running, the inverter switched off and the bypass switch open.
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