Vertiv Tech EXS 0080kTK16FN01000, User Manual

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Vertiv | Liebert EXS 80kVA UPS | User Manual 11
Overview
Figure 1-7 Schematic Diagram of ECO Mode
• In ECO mode, if the bypass fails or the bypass voltage exceeds normal limits, the UPS is transfered to
Normal mode (providing the output is not overloaded). However, if the bypass fails or the bypass voltage
exceeds normal limits while the output is overloaded, the UPS will not be transfered to Normal mode,
but will shut down the Bypass.
• In ECO mode, the efficiency of the UPS increases to 99%.
• In ECO mode, the load is not protected against mains distortion.
Parallel Redundancy Mode (system expansion)
For higher capacity or higher reliability, outputs of multiple UPS modules can be programmed for directly paralleling
while a built-in parallel controller in each UPS module ensures automatic load sharing. The parallel system can
be composed of up to four UPS modules. For the operation principle diagram of the parallel redundancy mode,
see Figure 6-1 .
Frequency Converter Mode
The UPS can be programmed into frequency converter mode for either 50 Hz or 60 Hz stable output frequency.
The input frequency may vary from 40 Hz to 70 Hz. In this mode, it is required to open the maintenance bypass
switch to disable the bypass operation, and the battery becomes optional depending on any requirement to
operate in battery mode.
LBS Mode
A dual-bus system consists of two independent UPS systems, with one or more parallel UPS modules each. The
dual-bus system is highly reliable and is applicable to load with multiple inputs. For single-input load, an STS
can be installed to power the load. For the operation principle diagram of the LBS mode, see Figure 6-4 and
Figure 6-5 .
Bypass input switch
Mains input
Rectifier input switch
Bypass input
Battery charger
Output switch
Inverter
Rectifier
UPS output
Battery
Inverter switch
Bypass automatic switch