socomec MASTERYS BC 20 - Protection on a Ups Without Auxilary Mains Supply

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ENGLISH
MASTERYS BC 15-40 kVA - Ref.: IOMMASBCXX09-EN 01
10. ELECTRICAL OPTIONS
10.7-1
UPS 3/3 without separate auxiliary supply
10.7. PROTECTION ON A UPS WITHOUT AUXILARY MAINS SUPPLY
Activating UPS protection on the mimic panel: access the UPS SETTING menu on the mimic panel (see the UPS SETTING menu
under the SERVICE menu section of the manual) and set the SET BACKFEED parameter to 3.BYPASS-INPUT Common.
Cable and trunk schematic
Note: The neutral is not disconnected as, even in the event of a single fault on the UPS, it never has high potential 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 alternatively a system that detects, signals and protects against high neutral/ground potential
which could lead to UPS failure.
Key
A Distribution panel
B Remote coil switch
L1-L2-L3-N Input power source
M1 Input power terminal board
Q1 Input power switch
T1 Remote switch
1
XB1 Connector on BKF PCB
A UPS
L1
Q1
L2
L3
N
T1
B
M1
L1
L2
L3
N
XB1
BKF card
1
Remote switches - rated current
Model T1
15 3/1 32 A AC1
15 3/3 32 A AC1
20 3/1 45 A AC1
20 3/3 45 A AC1
30 3/3 60 A AC1
40 3/3 90 A AC1