Intended use
The AC/DC sensitive measuring current transformer
cores of the CTBC series can
only
be used
in combi-
nation
with one of the follwing devices:
• MRCDB300 series (see manual D00343)
• CTUB100 series (see manual D00362)
• RCMB300 series (see manual D00372)
The measuring current transformer cores convert
system leakage and fault currents into a signal to be
processed by the devices mentioned above. The
measuring current transformers can be used in DC,
AC, and 3(N)AC systems. The devices are suitable for
detecting fault currents with smooth DC compo-
nents. CTBC…
P
are
insensitive to load currents due
to full magnetic shield, can be used for high short-
term system-related load currents.
General safety instructions
Part of the device documentation in addition to this
manual is the enclosed „Important safety instructi-
ons for Bender products“.
Installation, connection and commissioning are to
be carried out by electrically skilled persons only! It is
essential to follow the existing safety instructions.
I
This symbol indicates a high risk of danger
that will result in death or serious injury if
not avoided.
I
This symbol indicates a low-level risk that
can result in minor or moderate injury or
damage to property if not avoided.
i
This symbol refers to information that is de-
signed to help you make the best use of the
product.
Dimension diagrams
Dimensions (mm)
,
tolerance: ±0.5 mm
CTBC
a
b
c
d
e
f
g
h
i
j
k
l
20(P)
75
45
83
40
ø 20
ø 60
46
37
6
60.5
–
–
35(P)
94
54
100
58.4
ø 35
ø 79.5
45
46
5
60.5
–
–
60(P)
126
70
137
84.5
ø 60
ø 111
55
57
16
78.5
23
1.5
120(P)
–
–
211
139
ø 120
ø 188
66
96
7.5
96
–
17
210(P)
–
–
324
277
ø 201
ø 302
68
153
7.5
113
–
26
d
k
c
f
e
b
g
i
l
j
h
a
CTUB10
…
-CTBC60(P)
d
c
f
e
g
i
l
j
h
CTUB10
…
-CTBC120/210(P)
d
c
f
e
b
g
i
j
h
a
CTUB10
…
-CTBC20(P)/CTBC35(P)
CTBC-series_D00336_02_M_XXEN/09.2020
LINETRAXX® CTBC series
AC/DC sensitive measuring current
transformer cores
