Table of Contents
Advertisement
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.
On the LCD's: "LOAD OFF, SUPPLY FAILURE" will appear and the mimic panel will show:
2.
LED Indicator
LINE 1
LINE 2
BYPASS
INVERTER
BATTERY
Close all Parallel Isolators IA2 and check message "PARALLEL SW CLOSED" on LCD of each UPS.
3.
4.
Press simultaneously the two ON/OFF buttons on the UPS-control panel (PMD).
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 of each unit
(position OFF).
Using LCD panel, select the COMMANDS menu and choose command "LOAD TO INVERTER" (for
6.
parallel operation is enough to give the order in one of the units). 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
CERTIFIED BY THE MANUFACTURER.
Colour
Green
OFF
OFF
OFF
Flashing/Green
Colour
Green
Green
Green
RED
Green
04-3004_S5_OPM_ABB_POWERSCALE_10-50kVA_EN_150113.doc
Printed in Switzerland – Modifications reserved
Section-5
Page 6/6 ABB
Advertisement
Chapters
Table of Contents
