Bender LINETRAXX CTUB100 Series - Device View; Current Transformer

CTUB100-series_D00362_06_M_XXEN/04.2025 3
LINETRAXX® CTUB100 series
Device view
No. CTUB101 CTUB102 CTUB105 Note
1
Terminal
S1 (k)
Connection measuring
current transformer core
2 S2 (l)
3 –
Not in use
4 –
5 +12 V 24 V 24 V
Supply voltage U
S
6 GND
7 –12 V – –
8 T – –
Connection external test
from RCMA…
9 Test button T a) Offset calibration * | b) Internal functional test **
10 Combined LED
LED lights green normal operation
LED flashes red device error ***
11
Potentio-
meter for
adjusting
the mea-
suring
range
Potentio-
meter for
adjusting
the mea-
suring
range
Potentio-
meter
without
function
CTUB101/102 Response value evaluator Measuring range peak
I
∆n
≤ 0.1 A 0…900 mA
0.1 A < I
∆n
≤ 0.5 A 0…3.5 A
I
∆n
> 0.5 A 0…20 A
RCM applications: Select the measuring range according to the response value I
Δn
set on the
evaluator. If a larger measuring range is selected, the accuracy will decrease.
CTUB102 with EDS441-LAB: Location current EDS441-LAB max. 25 mA. Adjust the measuring
range on the measuring current transformer to this range.
CTUB105: Measuring range 3 is fixed and cannot be changed.
1
11
10 9
2 3 4
5 6 7 8
* Test button T: Offset calibration
i
For measuring current transformer cores with
an internal diameter ≥ 120 mm, an offset
calibration should always be carried out be-
fore the first commissioning. Note that during
the offset calibration the system is switched off
and no current flows through the measuring
current transformer.
Offset calibration sequence
Action LED
1
Install the measuring current
transformer in the system,
assemble the electronic
module and the measuring
current transformer core, U
S
disconnected
Off
2 Press and hold the “T” button Off
Action LED
3a
Press and hold “T”, supply the
electronic module with supply
voltage U
S
Lights red permanently
(not ready for operation)
3b
Flashes red slowly after
approx. 2 s (ready for calibration)
3c
Flashes red quickly after a total
of 5 s (calibration mode)
4
Start calibration: release “T”
when the LED flashes red quickly
Flashes red quickly
5 Calibration in progress Flashes red quickly
6a
Calibration successful, values
are accepted
Lights green permanently
6b
Calibration not successful.
Calibration value is not
accepted. The device is in an
error state. Either carry out
another offset measurement or
clear the error by switching the
device off and on again.
Flashes red slowly