Intended use
The AC/DC sensitive measuring current transformers
of the CTUB103 series convert system leakage and
fault currents into an evaluable measurement signal.
The devices are suitable for detecting fault currents
with smooth DC components. They consist of a
CTBC… measuring current transformer core and a
CTUB103 electronic module, which can be combined
to suit the application. The measuring current trans-
formers can be used in DC, AC and 3(N)AC systems as
well as in high-resistance grounded systems for mo-
nitoring the star point. The evaluation in resistance
grounded systems is carried out with devices of the
NGRM… series, to which the measuring current
transformers are connected.
General safety instructions
Part of the device documentation in addition to this
manual is the enclosed „Important safety instructions
for Bender products“.
Mounting, 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 dama-
ge to property if not avoided.
i
Information can help to optimise the use of
the product.
Device features
• Multicolour LED for operation, fault and status
messages
• Electronic module can be exchanged without me-
chanical separation of the primary conductors
• Monitoring of the connection to the measuring
current transformer
• Evaluator: NGRM500, NGRM700
2
CTUB103_D00410_02_M_XXEN / 09.2022
LINETRAXX® CTUB103
