15
2.8.2
Cable connection of hot standby
N
L
JP2
JP1
N
E
+
-
L
E
E
L
-
+
E
N
JP1
JP2
L
N
Slave UPS
Master UPS
AC input
Battery1
Battery2
Load
Figure2.8
Single phase hot standby connection diagram
Figure2.9
Three phase hot standby connection diagram
Connect the neutral,line,earth of the mater and slave in parallel
,
and make the
output line of slave connected to input of the master(JP2)
(
JP2
),
and ouput neutral
and earth in prallel
,
and loads will be at the ouput of the master
2.8.3
work pinciple of hot standby
Normal work mode:
Master UPS
Slave UPS
Load
AC input
REC
REC
INV
INV
Bypass
Bypass
Load
Figure2.10
Nomal work flow
Figure 2.10 stands for system normal
,
power is supplied by the master UPS
,
and