American Power Conversion SYMF800KH User Manual
Page 51
Residual Current Sense
Mains - inpu
t
UPS - outpu
t
PE
N
PE
PE
PE
Bypass - in
p
u
t
Bypass - outp
u
t
L1
L3
L2
L1
L3
L2
N
L1
L3
L2
L1
L3
L2
PE
Protective Earthing Conductor
Main Protective Earthing Termin
a
l
External SSW-Bypa
s
s
Symmetra M
W
( PDU )
Service Entran
c
e
Ma
in
invert
e
r
u
u
u
M
Main Protective Earthing Termin
a
l
N
PE
Q1
Q6
Q3
Q5
Earthing arrangements and protective conductors -
Symmetra MW in
TT installation
E
Suitable earth electrode:
R
A
x
I
a
< 50V
With reference to IEC 60364-4-41 § 413.
1
.4
.2
Residual current protec
tive device
can be u
se
d
.
Residual Current Sense
+-
+
-
Battery 1
Battery 2
Q7
Q8
Battery
1
Battery
2
PE
PE
Batte
ry
rack
Batte
ry
break
e
r
box
Q4
Delta
Inve
rter
i
i
i
Common-mode filter
Switchge
a
r
See: IEC 60364-4-41
§
413.1.4
With reference to IEC 60364-4-41 § 413.
1
.4
.1
Residual current protective dev
ice can not be
used at this p
oint.
Owing to parallel return path fo
r
the fault current