0MNMPMK10NPENUB 00 Pag. 17 / 57
3.2 Mains, load and battery connections
The operations described in this chapter must be carried out exclusively by a specialized technician.
The first connection to be made is the earth conductor.
THE UPS MUST NOT OPERATE WITHOUT AN EARTH CONNECTION
Before making the connection, open all the switches on the device and ensure that the UPS is completely isolated
from the power sources: battery and AC power line. More specifically, check that:
- the UPS input line or lines are completely isolated;
- the battery cabinet disconnector / fuse (if present) is open;
- all the UPS disconnectors - SWIN, SWBY, SWOUT and SWMB - are in the open position;
- check with a multimeter that there are no dangerous voltages on the terminal board.
For connection of the power cables to the terminal boards, refer to the “INSTALLATION DRAWINGS”
provided with the UPS and with the battery cabinet, if present.
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