19.Now actuate the mains input miniature circuit breakers (no. 2, p. 27/28) on each UPS one after the other. Move them to the "ON" position.
20.Move the “maintenance switch” manual bypass switches (no. 3, p. 27/28) on the back of each UPS to the “UPS” position. Finally, fasten the covers on each UPS again using the 4 respective screws that were previously removed.
The voltage supply of the parallel operation i busbar now takes place via the integrated electronic bypass switches of the UPS systems used. Check this operating state on the display
panel of each UPS = Bypass (chapter 6.1.3).
21.Now actuate your central external manual bypass: Switch from the “Bypass” position to “UPS operation”, i.e. connect your load busbar to the UPS parallel operation busbar.
This is done using a manual bypass switch with i overlapping switching contacts without any interruption in the load voltage, i.e. completely
22.Now switch on the inverters of the UPS systems. To do this, press the ON pushbutton of each UPS for approx. 2 seconds one after the other.
After switching on, each UPS carries out a self- i test and synchronizes itself with the parallel operation busbar, while the LED’s for load and battery state switch on and off consecutively in increasing order. After the successful synchronization of all inverters, the Inverter LED on each UPS lights up a few seconds later, whereby the UPS systems now work in parallel normal operating mode and supply the parallel
operation / load busbar with UPS voltage.
The central external manual bypass switch must be protected against accidental actuation. Never actuate it when the UPS systems are in inverter mode.
58