Working Principle; Conceptual Diagram; Working Modes - Huawei UPS2000-A-RTL Series User Manual

UPS2000-A-(6 kVA-10 kVA)-RTL
User Manual

2.2 Working Principle

2.2.1 Conceptual Diagram

Figure 2-2
Figure 2-2 UPS conceptual diagram

2.2.2 Working Modes

The UPS has the following working modes:
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Issue 07 (2020-01-10)
No. Meaning
3 UPS subcategory
4 Output capacity
5 UPS type
6 Long backup time
model
shows the UPS conceptual diagram.
Normal mode
When the mains is normal, the rectifier boosts the mains input voltage and converts the
AC power into stable DC power for the inverter, and the mains charges batteries over a
charger. Then the inverter converts the DC power into stable AC power, which is
supplied to loads.
Battery mode
When the mains is abnormal or disconnected, the rectifier step-up transformer boosts the
DC power supplied from batteries. Then the inverter converts the DC power into stable
AC power for powering loads.
Bypass mode
The mains supplies power directly to loads after filtering. The UPS transfers to bypass
mode when overload, overtemperature, or faults occur. This mode does not provide
battery backup capability.
ECO mode
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Description
A series
 6K: 6 kVA
 10K: 10 kVA
RT: rack-mounted or tower-mounted
L: long backup time model, using external large-capacity
batteries that provide long backup time.
2 Overview
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