MASTERYS BC
from 15 to 20 kVA
45
ENGLISH
10.6.2 Protection on a UPS without auxiliary mains supply.
Activating UPS protection on the mimic panel: access the
Configurations menu
on the mimic panel (see
the
Configurations Menu
under the
Service Menu
section of the manual) and set the
BACKFEED TYPE
parameter to
3.BYPASS-INPUT Common
.
Diagram of Principle.
OPTIONS
10
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 that could lead to UPS failure.
10.6.2-1
A
UPS
L1
Q1
L2
L3
N
T1
B
M1
L1
L2
L3
N
XB1
BKF card
UPS 3/3 without separate auxiliary supply.
Legend.
A
Distribution panel
B
Coil remote 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
1
Remote switches - rated current
Model
T1
15 /1
2 A AC1
15 /
2 A AC1
20 /1
45 A AC1
20 /
45 A AC1
Summary of Contents for Masterys MAS2BC115M+D1
Page 1: ...INSTALLATION AND OPERATING MANUAL MASTERYS BC from 15 to 20 kVA...
Page 2: ...ITALIANO...
Page 48: ...ITALIANO FRAN AIS...
