Power Supply User Manual

7. Now actuate the mains input miniature circuit breakers

(no. 2, p. 26/27) on each UPS one after the other.

Move them to the "ON" position.

8. Move the “maintenance switch” manual bypass

switches (no. 3, p. 26/27) 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

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).

9. 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

overlapping switching contacts without any

interruption in the load voltage, i.e. completely

interruption-free.

10. 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-

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.