Delta NT Series User Manual

4
Chapter 3 Operation Modes
Chapter 3 : Operation Modes
There are four basic operation modes for the NT series UPS, either of which can
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operation modes are described as follows.
3.1 Normal Mode (Single)
Figure 3-1-a: Status Block of Normal Mode (10-200kVA)
RECTIFIER INPUT
RESERVE
MAINS
BREAKER
RESERVE INPUT
BREAKER
MANUAL BYPASS
BREAKER
OUTPUT
BREAKER
Power Flow
BATTERY BANK
Power Flow
LOAD
STATIC SWITCHINVERTERRECTIFIER
Power Flow
Power Flow
Figure 3-1-b: Status Block of Normal Mode (260-500kVA)
MANUAL BYPASS
RESERVE INPUT
OUTPUT
STATIC SWITCH
RECTIFIER INPUT
LOAD
BATTERY BANK
SWITCH
SWITCH
SWITCH
RESERVE
MAINS SWITCH RECTIFIER INVERTER
Power FlowPower Flow
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-a and Figure 3-1-b).

Delta NT Series Specifications

General

Brand	Delta
Model	NT Series
Category	UPS
Language	English