User's Manual

54
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.
i
The load supply now takes place via the central
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!