Manual Bypass Mode Start-Up Procedures (Parallel) - Delta HPH-60K User Manual

7.2.4 Manual Bypass Mode Start-up Procedures (Parallel)

From Normal Mode to Manual Bypass Mode (Parallel)
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Ultron HPH Series UPS
WARNING:
1. Please note that you can only turn on the Manual Bypass Breaker when the UPS
needs maintenance. This ensures that the supply of power to the critical loads
will continue. If you turn on the Manual Bypass Breaker during normal mode,
the inverter will shut down, the UPS will transfer from normal mode to manual
bypass mode, and the output won't be protected.
2. In manual bypass mode, the manual bypass supplies power to the critical loads
and maintenance personnel can perform maintenance without interrupting the
power supply to the critical loads.
3. When the UPS is in manual bypass mode, there is no high voltage inside the
UPS except the wiring terminal block and the Manual Bypass Breaker. Do not
touch the wiring terminal block and the Manual Bypass Breaker to avoid electrical
shock.
Press the OFF key (
the DOWN key (
Repeat the procedures stated in
pass mode. At this moment, each UPS's BYPASS LED indicator (
minates.
Turn on each UPS's manual bypass breaker.
For single input, please turn off each UPS's input breaker. For dual input, please
turn off each UPS's input breaker and bypass breaker.
Turn off each UPS's output breaker.
Ensure that each UPS's DC BUS voltage drops to below 20V.
down.
Turn off each UPS's external battery cabinet's breaker.
) of the UPS that you want to shut down once and press
to let each parallel UPS transfer to run in by-
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