Delta NT Series User Manual

6
Chapter 3 Operation Modes
3.3 Reserve AC Supply Mode (Single)
RECTIFIER INPUT
RESERVE
MAINS
BREAKER
RESERVE INPUT
BREAKER
MANUAL BYPASS
BREAKER
OUTPUT
BREAKER
BATTERY BANK
Power Flow
LOAD
STATIC SWITCHINVERTERRECTIFIER
Power Flow
Power Flow
Power Flow
Figure 3-3-a: Status Block of Reserve AC Power Supply Mode (10-200kVA)
MANUAL BYPASS
RESERVE INPUT
OUTPUT
STATIC SWITCH
RECTIFIER INPUT
LOAD
BATTERY BANK
SWITCH
SWITCH
SWITCH
RESERVE
MAINS SWITCH RECTIFIER INVERTER
Power Flo wPower Flow
Power Flo w
Power Flow
Figure 3-3-b: Status Block of Reserve AC Power Supply Mode (260-500kVA)
When the inverter encounters abnormal situations such as over temperature, long-
time overload, output short circuit, abnormal output voltage and exhausted battery,
the inverter will automatically shut down itself for self-protection. Meanwhile, if the
reserve AC power is normal, the static switch will switch to the reserve AC power
to supply power to the loads without any interruption of power supply. After the
abnormal situations mentioned above are eliminated, the static switch will switch
back to the main AC source (see Figure 3-3-a and 3-3-b).

Delta NT Series Specifications

General

Brand	Delta
Model	NT Series
Category	UPS
Language	English