Delta DPS-400K - Manual Bypass Mode (Single)

3-5
3
Operation Modes
3.4 Manual Bypass Mode (Single)
When the UPS needs maintenance, you can manually switch the UPS to manual bypass
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all power inside the UPS is completely cut off and maintenance personnel can perform
maintenance safely. During manual bypass mode, no LED illuminates.
LOAD
BYPA.
MAIN
LOAD
BYPA.
MAIN
Q3 Switch
Q2 Switch
Q1 Switch
Rectifier Inverter
Circuit
Breaker
Batteries
STS
Q4 Switch
(Figure 3-4: Path of Electrical Power through the UPS in Manual Bypass Mode)
NOTE:
After the power inside the UPS has been completely cut off, there is no high
voltage inside the UPS except the wiring terminals and the Manual Bypass Switch
(Q3). Do not touch the wiring terminals or the Manual Bypass Switch (Q3) to avoid
electrical shock (Q3).