Delta HPH-100K, Руководство пользователя, Страница: 62 / 80

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Ultron HPH Series UPS
7.2.4 Manual Bypass Mode Start-up Procedures (Parallel)
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.
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From Normal Mode to Manual Bypass Mode (Parallel)
1
Press the OFF key ( ) of the UPS that you want to shut down once and press
the
DOWN
key (
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2
Repeat the procedures stated in
1
to let each parallel UPS transfer to run in by-
pass mode. At this moment, each UPS’s BYPASS LED indicator ( ) illu-
minates.
3
Turn on each UPS’s manual bypass breaker.
4
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.
5
Turn off each UPS’s output breaker.
6
Ensure that each UPS’s DC BUS voltage drops to below 20V.
7
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down.
8
Turn off each UPS’s external battery cabinet’s breaker.