Index
Action
LED
6
Release the "T" button (9).
flashes
red
quickly
7
Calibration successful
lights
green
Calibration not successful: repeat calibration
flashes
red
Device view
No.
CTUB103
Note
1
Terminal X
S1 (k)
Connection measuring current
transformer core/NGRM…
2
S2 (l)
3
-
Not in use
4
-
5
24 V
Supply voltage
U
S
6
GND
7
-
Not in use
8
-
9
Button T
Offset calibration (see below)
10
Combined LED
lights green normal operation
flashes red device error;
U
S
is connected, no connection to CTBC.
Check the connection between CTUB and CTBC, if necessary, snap on the electronic module
again. If LED still flashes red: Contact Service please.
11
Potentiometer
for adjusting the
measuring range
Measuring range
Scaling
5 A
5 A/50 mA
100:1
10 A
10 A/50 mA
200:1
25 A
25 A/50 mA
500:1
1
11
10
9
2 3 4
5 6 7 8
Offset-Calibration
i
For measuring current transformer cores with an internal diameter ≥ 120 mm, an offset calibration should
always be carried out before the first commissioning. Note that during the offset calibration the system is
switched off and no current flows through the measuring current transformer. For safety reasons, offset
calibration cannot be performed if a current > 15 mA flows through the measuring current transformer
during offset calibration.
Index
Action
LED
1
Disconnect X plug (1…8) or interrupt US (24 V). off
2
Press and hold the "T" button (9).
off
3
Connect X plug (1…8) or switch on US (24 V).
Continue to hold the "T" button (9) down.
lights red
4
Continue to hold the "T" button (9) down.
flashes
red
5
Continue to hold the "T" button (9) down.
flashes
red
quickly
4
CTUB103_D00410_02_M_XXEN / 09.2022
LINETRAXX® CTUB103
