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34001813EN/AE - Page 18
2. Installation
TNC upstream, TNS downstream
For separate Normal AC and Bypass AC lines from a single source
Installation with upstream IT and downstream TNS
For separate Normal AC and Bypass AC lines from a single source
Installation with upstream TT and downstream TT (with upstream differential protection)
For separate Normal AC and Bypass AC lines from the same source
The upstream differential protection rating must be at least 3A
1.the UPS internal PEN bar must be connected to the Q4S neutral upstream of Q4S
2.The UPS internal PEN bar must be connected to the Q5N neutral downstream of Q5N
3.The UPS internal PE bar must be transformed into a PEN bar (cables supplied for TNC options)
Bypass AC
Normal AC
L1
L2
L3
L1
L2
L3
N
L1
L2
L3
N
Load
PEN
SS
UPS
PFC
INV
MLVS
PEN
PEN
PE
Bypass AC
Normal AC
L1
L2
L3
L1
L2
L3
N
L1
L2
L3
N
CPI
R1
R2
CPI2
Load
PE
SS
UPS
PFC
INV
MLVS
PE
Bypass AC
Normal AC
L1
L2
L3
L1
L2
L3
N
L1
L2
L3
N
Load
PE
SS
UPS
PFC
INV
MLVS