Delta NT Series User Manual

7
Ultron NT Series
3.4 Maintenance Bypass 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
Figure 3-4-a: Status Block of Maintenance Bypass Mode (10-200kVA)
MANUAL BYPASS
RESERVE INPUT
OUTPUT
STATIC SWITCH
RECTIFIER INPUT
LOAD
BATTERY BANK
SWITCH
SWITCH
SWITCH
RESERVE
MAINS SWITCH RECTIFIER INVERTER
Power Flow
Power Flow
Power Flow
Figure 3-4-b: Status Block of Maintenance Bypass Mode (260-500kVA)
When maintenance is needed and the reserve AC power is normal, the UPS can
be switched from inverter mode to bypass mode manually with continuous power
delivering to the loads. Under such conditions, the internal power will be completely
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voltage. As a result, risks will not exist in the UPS so service personnel can perform
maintenance safely (see Figure 3-4-a and 3-4-b).
NOTE :
If only single input power is available, please utilize the same power
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Delta NT Series Specifications

General

Brand	Delta
Model	NT Series
Category	UPS
Language	English