Delta Ultron DPM Series, Руководство пользователя, Страница: 157 / 264

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6 UPS Operation
(b) Dual Input:
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power to the connected loads. Once the bypass start-up procedures are completed,
the following screen appears and the tri-color LED indicator remains yellow.
UPS-1.1
Bypass
2019-Mar-01 09:30
EVENT LOG
10 mins
Bypass
Load
0 %
Mains
6.2.4 Manual Bypass Mode Start-up Procedures
WARNING:
1. For parallel units, ensure that every operation procedure mentioned below is
synchronized to all parallel UPSs.
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parallel ones, please contact service personnel.
3. Please note that you can turn on the external maintenance bypass cabinet’s
manual bypass breaker (Q3) only when the UPS needs maintenance. In
manual bypass mode, power supply of the connected critical loads comes from
the manual bypass and the output is not protected. Please ensure that the
bypass AC source is normal.
4. In Manual Bypass mode, power supply of the critical loads comes from the
manual bypass; thus, maintenance personnel can perform maintenance without
interrupting the power supplying to the critical loads.
5. In manual bypass mode, ensure that all of the breakers and switches (except
the external maintenance bypass cabinet’s manual bypass breaker (Q3)) are
in the
OFF position, and use a voltmeter to check if there is any high voltage
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the UPS can service personnel perform UPS maintenance.
6. During UPS maintenance process, to avoid electric shock, do not touch the
following parts:
(a) The external maintenance bypass cabinet’s AC Input terminal block, Bypass
Input terminal block, UPS Output terminal block, Battery Input terminal
block, grounding terminals and any copper bars connected to the external
maintenance bypass cabinet’s Manual Bypass Breaker (Q3).
(b) Every external battery cabinet’s battery input terminal block.
These parts mentioned above may carry high voltage