Manual Bypass Mode Start-Up Procedures - Delta Modulon DPH Series User Manual

6.2.4 Manual Bypass Mode Start-up Procedures

WARNING:
1. For parallel units, ensure that every operation procedure mentioned below is
3. Please note that you can turn on the Manual Bypass Switch (Q3) only when
4. In Manual Bypass mode, power supply of the critical loads comes from the
5. Ensure that all of the switches and breakers (except the Manual Bypass Switch
6. During the UPS maintenance process, do not touch the following parts: AC
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. For the tri-color LED indicator's location, please refer
to Figure 2-11.
UPS-1.1
Power Flow
Power Flow
Summary
System Status
(Figure 6-14: On-Line Mode Screen_ User Login & ON/ OFF Button Location)
synchronized to all parallel UPSs.
parallel ones, please contact service personnel.
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.
manual bypass; thus, maintenance personnel can perform maintenance
without interrupting the power supplying to the critical loads.
(Q3)) are in the OFF position, and use a voltmeter to check if there is any high
voltage inside the UPS. Only after you have confirmed that there is no high
voltage in the UPS can service personnel perform UPS maintenance.
Input terminal block, Bypass Input terminal block, UPS Output terminal block,
Battery Input terminal block, grounding terminals (see Figure 5-8 ~ Figure 5-10
for the location of these terminal blocks and terminals) and any copper bars
connected to the Manual Bypass Switch (Q3), as they may carry high voltage.
MEASUREMENT SETUP
POWER FLOW
Maintenance
Bypass
Bypass
Mains
90 %
5 mins
EMS
MAINTENANCE LOG IN EVENT LOG
User
6-13
6 UPS Operation
10:15
Sep 25,2018
On-Line
ON/ OFF
Button
Load
30 %