MASTERYS BC
from 15 to 20 kVA
1
ENGLISH
3.4.1 Back-feed protection.
If the UPS does not have an automatic protection device against current back-feed, the operator/installer must
add a warning label to all the mains power disconnecting switches installed at a distance from the UPS area, so
as to remind technicians of the fact that the circuit is connected to a UPS (see the CAUTION section in paragraph
2 of this manual and paragraph 4.5.. of the EN62040-1-1 200-11 standard.
The label is supplied with the system.
The back-feed protection device may be built into the system (only on specific request), or may be installed
externally as the UPS has a command for an external remote switch that can be inserted upstream of the UPS:
• If the UPS does have an automatic back-feed switch (only on request), proceed with the connection to the
mains and to the auxiliary power supply unit (if these are separate), as described in paragraph .5 of this
manual.
• To install an external back-feed protection device, use the optional card (BKF) to be installed on the terminal
board panel, and an external remote switch that should be installed as close as possible to the UPS area.
For further information on the connection and the type of remote switch, please read paragraph 10.6 of this
manual.
ATTENTION.
The neutral is not disconnected as, even in the event of a single fault on the UPS, it never has high po-
tential when the mains and/or auxiliary power supplies are disconnected upstream. This is to prevent
transformation of the power source to the UPS every time there is a power failure.
Should the neutral potential be very high due to certain error conditions or due to installations
downstream (e.g. ground fault not detected and protected, high dispersion of a phase, or the
IT system), it will be necessary to install either devices that disconnect the Neutral or alterna-
tively a system that detects, signals and protects against high neutral/ground potential that
could lead to UPS failure.
NOTE.
For equipment with separate Emergency Mains, it must be possible to make the neutral of the Emer-
gency Mains line electrically common with the neutral of the main input feed line.
3.5 INSTALLATION PROCEDURE AND INSTRUCTIONS.
The procedure below should be strictly followed for correct installation:
3.5-1
Set switches
Q1
,
Q2
,
Q6
to position 0.
Switch off the UPS, remove the power, open the switches
of any external battery cabinets, isolate the system and
wait for 5 minutes before working on the terminal board
or any internal UPS parts.
3
UNPACKING AND INSTALLATION
OF THE UNIT
3.5-1
Q1
Q2
Q6
Summary of Contents for Masterys MAS2BC115M+D1
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