5
Ultron NT Series
Chapter 3 : Operation Modes
There are four basic operation modes for the NT series UPS, either of which can
deliver loads with reliable and high quality power source in any conditions. The
operation modes are described as follows.
3.1 Normal Mode (Single)
Figure 3-1: Normal Mode Block Diagram_ Single Unit
RECTIFIER INPUT
RESERVE
MAINS
BREAKER
RESERVE INPUT
BREAKER
MANUAL BYPASS
BREAKER
OUTPUT
BREAKER
Power Flow
BATTERY BANK
Power Flow
LOAD
STATIC SWITCH
INVERTER
RECTIFIER
Power Flow
Power Flow
In normal mode, DC power, rectifying from AC input power, charges batteries and
powers the inverter that transforms DC power to stable and clean AC power to the
loads (see
Figure 3-1
).
3.2 Back-up Mode (Single)
RECTIFIER INPUT
RESERVE
MAINS
BREAKER
RESERVE INPUT
BREAKER
MANUAL BYPASS
BREAKER
OUTPUT
BREAKER
BATTERY BANK
Power Flow
Power Flow
LOAD
STATIC SWITCH
INVERTER
RECTIFIER
Power Flow
Figure 3-2: Back-up Mode Block Diagram_ Single Unit
