position „bypass” i.e. that the mains supplies the loads bus-bar.

5.Connect the separator of the output of each UPS, i.e. connect every output of a UPS with the parallel operation bus-bar.

6.Put in the prefuse of the low voltage main distribution field (there, where the UPS systems are connected on the input side with the mains), resp. switch on the corresponding line fuse.

The load supply now takes place via the central i external manual bypass. The parallel operation bus-bar is supplied by the integrated bypass of each UPS. Parallel operation bus-bar and load

bus-bar are not yet connected at this time!

7.Press the mains input circuit breaker one by one on each UPS (Pos. 3, page 26). Bring it to the “ON” position.

8.The manual bypass switch „Maintenance Switch“ (Pos. 2, page 26) on the back of each UPS has to be brought into the “UPS” position. Fix on each UPS the cover with the four previously removed screws.

The power supply of the parallel bus-bar now is i realised via the integrated electronic bypass equipment of the UPS. Check the operation state on the display of each UPS = bypass

(chapter 6.1.3.).

9.Activate the central external manual bypass now: Change from position “bypass” to “UPS operation” i.e. connects the load bus-bar with the UPS parallel operation bus-bar.

This takes place without interruption, if you are i using a manual bypass switch with overlapping

contacts.

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