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INFORMATION
Galvanically insulate the secondary sides of the
power supplies (24 V DC) from each other!
7.7.4 Connection examples - Residual cur-
rent measurement
e.g.:
Residual current
transformer CT-AC-RCM e.g.:
Residual current
transformer
CT-AC/DC type B+
Fig. Connection variant, residual current measurement via current
transformer Type A and Type B. (Power supply with U = 24 V DC,
residual ripple < 5%, output = 24 W.
Fig. Connection variant, residual current monitoring via current
transformer of Type B. Each residual current transformer of the
series CT-AC/DC type B+ RCM requires its own power supply
(with U = 24 V DC, residual ripple < 5%, power = 24 W).
7 8 9 10
230 V
AC
24 V
DC
4..20 mA
- +
9 10
230 V
AC
24 V
DC
4..20 mA
- +
230 V
AC
24 V
DC
L1
L2
L3
N
L1
L2
L3
N
7 8
- +
L1
L2
L3
N
L1
L2
L3
N
4..20 mA
e.g.:
Residual current trans-
former CT-AC/DC type
B+
e.g.:
Residual current transform-
er CT-AC/DC type B+
CAUTION
Risk of injury or damage to the meter/your
system due to short circuit!
Inadequate insulation of the operating equipment
at the residual current measuring input with respect
to the supply circuits can cause voltages at the
measuring input which represent a hazard when
touched or damage to your device or system.
· Ensure reinforced or double insulation with
respect to the supply circuits!
· Isolate residual current measuring inputs
galvanically from each other and galvanically
from the supply voltage (24 V)!
INFORMATION
Pay attention to the polarity when using type CT-
AC/DC current transformers!