each UPS are in the “Bypass” position and all mains input miniature circuit breakers (no. 2, p. 26/27) on the back of each UPS are in the “OFF” position.

4.Check the position of the central external manual bypass. This must be in the “Bypass” position, i.e. supply of the load busbar by the supplying mains.

5.Now close all isolators in the output of each UPS, i.e. connect the output of each UPS with the parallel operation busbar.

6.Now insert the back-up fuses in your low-voltage main distribution (where the central external manual bypass as well as the individual UPS systems are connected to the mains on the input side) or switch on the corresponding line protection switches there.

The load supply now takes place via the central i external manual bypass, and the parallel operation busbar is supplied with power via the integrated manual bypasses of each UPS. However, the parallel operation busbar and load busbar are not yet connected to each other at

this time!

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