Bender LINETRAXX CTUB100 Series - Table of Contents; Measuring Circuit (IC1); Supply Voltage; Supply Voltage U

6 CTUB100-series_D00362_06_M_XXEN/04.2025
LINETRAXX® CTUB100 series
The cables must be aligned with the centre of the measuring
current transformer.
Installation instructions measuring current transformer
Technical data
Insulation coordination acc. to IEC 60664-1/IEC 60664-3
Definitions
Measuring circuit (IC1) ........Prim. conductors routed through the CT
Secondary (IC2) ...................................... Connections terminal block
Rated voltage .............................................................................800 V
Overvoltage category ...................................................................... III
Area of application .................................................. ≤ 2000 m AMSL
Rated impulse voltage ( IC1/IC2) ..................................................8 kV
Rated insulation voltage (reinforced insulation; IC1/IC2)
.................................................................................................. 800 V
Pollution degree ...............................................................................2
Supply voltage
CTUB101
Description ........................................................+12 V, GND, -12 V
Supply voltage U
s
............................................................DC ±12 V
Operating range of U
s
............................................................±2 %
Ripple U
s
...............................................................................≤ 1 %
Power consumption...........................................................≤ 2.5 W
CTUB102 and CTUB105
Description .....................................................................24 V, GND
Supply voltage U
s
.............................................................. DC 24 V
Operating range of U
s
..........................................................±20 %
Ripple U
s
...............................................................................≤ 1 %
Power consumption...........................................................≤ 2.5 W
Inrush current .............................................................. 1 A for 1 ms
Measuring circuit
Internal diameter measuring CT ................. see dimension diagrams
Rated current I ...........................RCM application / MRCD application
CTBC20 at I
Δn
≥ 30 mA ..................................................63 A / 40 A
CTBC20 at I
Δn
≥ 300 mA ................................................80 A / 63 A
CTBC20P ........................................................................80 A
/ 80 A
CTBC35 at I
Δn
≥ 30 mA ................................................125 A / 80 A
CTBC35 at I
Δn
≥ 300 mA ............................................160 A / 125 A
I
Caution! Existing protective conductors and
low-resistance conductor loops must not be
routed through the measuring current trans-
former! Otherwise, high currents could be in-
duced into the conductor loop due to the AC/DC
sensitive measuring technology used.
I
Caution! The connecting cable (supply, secondary
connection etc.) must not be routed directly past
the current transformer core, otherwise inter-
ference pulses may occur.
I
Caution! The measuring current transformer
must be connected to the corresponding eval-
uator before the first use and before commis-
sioning of the monitored installation.
i
Do not route any shielded cables through the
measuring current transformer.
Pay attention to the following:
All current-carrying cables must be routed through the measuring
current transformer.
PE
L1
L2
L3
N
P1 (K): YE
P2 (L): GY
Never route an existing protective conductor through the
measuring current transformer.
The primary conductors may only be bent from the specified
minimum distance. The minimum bending radius specified by the
manufacturers for the conductors used must be observed.
* Distance to 90° angle = 2 x outer diameter.
*
*