OnLine Power Battery Backup System - Manual (Page 40)

OLP
Three Phase UPS Systems
4.0 OPERATION
4-1
4. OPERATIONS
After all cables have been connected, and power source is available at the input
terminals, the UPS is ready to operate. Before turning on any switch or breaker,
once again check the following:
(a) Check that the input voltage conforms to the UPS’s rated input voltage.
(b) Check that the input frequency conforms with the UPS’s rated input
frequency.
(c) Check that the load at the output is switched off.
(d) Check that all breakers and the battery disconnects are opened.
(e) Check that no foreign material is inside the UPS.
4.1. Startup Procedure
To start the UPS from complete shutoff to normal operation, follow the steps
below to turn on the UPS.
(a) In case there is an extra input breaker for some special specification, please
close the input breaker first.)
(b) Close the reserve breaker – The reserve and output LED on the mimic
panel will light up, indicating the reserve static switch loop is
energized. The output now has power. The supply of power in the
UPS is established and the fans will operate.
(c) Close the rectifier breaker - The rectifier will be automatically started if the
power source connected is correct. Wait 30 sec for DC bus
voltage to rise until the warning LEDs of “BAT LOW” and “BAT
LOW STOP” go off (on the front panel). Now, the DC is already
ready for the inverter.
(d) Close the (optional) battery breaker - For safety purposes, a breaker (or
fuse) is employed between the batteries and the DC bus. Now the
batteries will take over to supply the DC bus if rectifier mains fail.