Load Transfer: From Maintenance Bypass To Inverter Operations - ABB CONCEPTPOWER CLASSIC DPA-50 User Manual

5.1.4

Load Transfer: from Maintenance Bypass to Inverter operations

This procedure describes the sequence of operations to be done in order to restart the UPS and restore ON-
LINE mode (Load on Inverter).
WARNING
Situation of UPS-System before starting the Transfer Procedure to ON-LINE mode:
The load is supplied directly by Input Mains power and the UPS is OFF.
1. Close battery fuses/breakers in the external battery cabinets or racks.
2. On the LCD's: "LOAD OFF, SUPPLY FAILURE" will appear and the mimic panel will show:
LED Indicator
LINE 1
LINE 2
BYPASS
INVERTER
BATTERY
3. Close Parallel Isolators IA2-1, IA2-2, IA2-3, IA2-4, IA2-5 (depending of the UPS frames) and check
message "PARALLEL SW CLOSED" on LCD of each module.
4. Press simultaneously the two ON/OFF buttons on the UPS-control panel (PMD) on all control panels.
Unit will start-up and after about 60 seconds the mimic panel will show:
LED Indicator
LINE 1
LINE 2
BYPASS
INVERTER
BATTERY
5. Make sure that the bypass LED is green, then open the Maintenance Bypass Switch IA1 (position
OFF).
6. Using LDC panel, select the COMMANDS menu and choose command "LOAD TO INVERTER". This
will transfer the LOAD to Inverter on the complete system (all units). On LCD panel "LOAD
PROTECTED" will appear.
THE LOAD IS NOW SUPPLIED BY INVERTER POWER AND IS PROTECTED
THE OPERATIONS DESCRIBED IN THIS CHAPTER MUST BE
PERFORMED BY A SERVICE ENGINEER FROM THE MANUFACTURER OR
FROM A AGENT AUTHORIZED BY THE MANUFACTURER.
!
Colour
Green
OFF
OFF
OFF
Flashing/Green
Colour
Green
Green
Green
RED
Green
04-3008_S5_ABB_OPMCPDPA-S2_GB_121202
Printed in Switzerland – Modifications reserved
Section-5
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