0MNA080A55-GB REV 01 page 17 / 75
a - EPO terminal board located on the UPS
b - EPO switch with auxiliary contacts (not provided).
On the SENTRY MPS-HP, the jumper on the EPO terminals (page 20) must be removed, and the wires from the
auxiliary contact of the button must be connected in place of the jumper.
The contact must be closed with the button in the rest position and must open when the button is pressed.
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 SENTRY MPS-HP 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 (position 0);
- 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.
Input neutral
The power supply to the SENTRY MPS-HP input (by-pass line) must be three-phase with neutral.
The neutral conductor is necessary only on by-pass line.
UPS
a
b
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