LINETRAXX® CTUB100 series
AC/DC sensitive measuring current transformers (type B)
Intended use
The AC/DC sensitive measuring current transformers (type
B) of the CTUB100 series convert system leakage and fault
currents into an evaluable measurement signal. The de-
vices are suitable for detecting fault currents with smooth
DC components. They consist of a CTBC… measuring cur-
rent transformer core and a CTUB10… electronic module,
which can be combined to suit the application. The meas-
uring current transformers can be used in DC, AC, and
3(N)AC systems. The measurement signal is evaluated us-
ing devices of the RCMA420/423, RCMS460/490, respec-
tively EDS440/441-LAB series, to which the measuring
current transformers are connected.
General safety instructions
Part of the device documentation in addition to this ma-
nual is the enclosed "Important safety instructions for
Bender products".
Installation, connection and commissioning are to be
carried out by electrically skilled persons only!
It is es-
sential to follow the existing safety instructions.
I
D
anger
!
indicates a high risk of danger that will
result in death or serious injury if not avoided.
I
C
aution
!
indicates a low-level risk that can result
in minor or moderate injury or damage to proper-
ty if not avoided.
i
This symbol refers to information that is designed
to help you make the best use of the product.
Device features
• Multicolour LED for operation, fault and status
messages
• Electronic module can be exchanged without
mechanical separation of the primary conductors
• Extension/retrofitting or modification of functio-
nalities possible in case of changed monitoring
requirements
• Insensitive to load currents due to full magnetic
shield, can be used for high short-term system-
related load currents (for CTBC…
P
only).
• Monitoring of the connection to the measuring
current transformer
Overview: Possible combinations of
evaluator, electronic module and measuring
current transformer core
Electronic modul
Evaluator
Meas. current transformer core
Connecting cable
Supply voltage
CTUB101
RCMA420
CTBC20(P)…60(P)
CTX… (6 wires)
DC ±12 V
The evaluator supplies the
measuring current transformer.
RCMA423
CTBC20(P)…210(P)
RCMS460/490*
CTBC20(P)…210(P)
CTX… (5/6 wires)
DC ±12 V
External power supply unit AN420
CTUB102
RCMS460/490
CTBC20(P)…210(P)
CTXS… (4 wires)
24 V
External power supply unit
CTUB104
EDS440/441-LAB
CTBC20(P)…60(P)
* Only recommended for retrofit if an AN420 power supply unit is already avai-
lable. In this case, if the ready-made connecting cable CTX… is used, the green
plugs of the connecting cable (on the evaluator side) must be removed.
Afterwards, the individual conductors must be crimped and connected to the
RCMS460/490 or the AN420. In this case, the conductor "T" is not used
CTUB100-series_D00362_02_M_XXEN / 08.2021
Manual
EN
