Delta DPH-300K, User Manual

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6 UPS Operation
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 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. Ensure that all of the breakers (except the 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 the UPS maintenance process, do not touch the following parts: AC
Input terminal block, Bypass Input terminal block, UPS Output terminal block,
Battery Input terminal block, grounding terminals (see
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for the location of these terminal blocks and terminals) and any copper bars
connected to the Manual Bypass Breaker (Q3), as they may carry high voltage.
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From On-Line Mode to Manual Bypass Mode
1
In On-Line mode, the LCD’s main screen shows as follows and the tri-color LED
indicator illuminates green.
On-Line
POWER FLOW
Maintenance
Bypass
Bypass
Mains
90 %
5 mins
Load
30 %
MEASUREMENT
Power Flow
UPS-1.1 SETUP MAINTENANCE EVENT LOG LOG IN
User
Power Flow
Summary
EMS
System Status
10:15
May 25,2018
ON/ OFF
Button
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