Bender LINETRAXX MRCDB423 User manual

Manual ENMRCDB423_D00396_01_M_XXEN/06.2021
LINETRAXX® MRCDB423
Modular Residual Current Device type B for additional protec-
tion (protection against indirect contact) in earthed systems
(TN and TT systems)

Table of contents
1 General instructions .........................................................................3
1.1 How to use this manual................................................................................................................3
1.2 Indication of important instructions and information .....................................................3
1.3 Signs and symbols ..........................................................................................................................3
1.4 Training courses and seminars...................................................................................................3
1.5 Delivery conditions.........................................................................................................................3
1.6 Inspection, transport and storage ............................................................................................4
1.7 Warranty and liability.....................................................................................................................4
1.8 Disposal of Bender devices..........................................................................................................4
1.9 Safety ...................................................................................................................................................5
1.10 Intended use.....................................................................................................................................5
2 Function...............................................................................................6
2.1 Device features ................................................................................................................................6
2.2 Functional description ..................................................................................................................6
2.3 Standard display..............................................................................................................................7
2.4 Connection monitoring ................................................................................................................7
2.5 Manual self test................................................................................................................................7
2.6 Malfunction .......................................................................................................................................7
2.7 Time delays t and ton .....................................................................................................................8
2.8 External, combined test or reset button T/R.........................................................................8
2.9 Device parameter settings...........................................................................................................8
3 Dimensions and mounting ..............................................................9
3.1 Dimensions........................................................................................................................................9
3.2 Mounting............................................................................................................................................9
4 Connection ....................................................................................... 10
5 Operation and settings.................................................................. 11
5.1 Function of the operating elements..................................................................................... 11
5.2 Display elements ......................................................................................................................... 11
5.3 Meaning of the LEDs................................................................................................................... 11
5.4 Standard display........................................................................................................................... 12
5.5 Menu structure.............................................................................................................................. 12
5.6 Setting ranges and factory settings ...................................................................................... 12
5.7 Parameter input............................................................................................................................ 13
6 Measuring current transformers.................................................. 15
6.1 Wiring diagram ............................................................................................................................. 15
6.2 Dimension diagrams................................................................................................................... 15
6.3 Fastening......................................................................................................................................... 16
6.4 Mounting instructions................................................................................................................ 16
6.5 Shielded measuring current transformer variants........................................................... 16
7 Technical data.................................................................................. 17
7.1 Ordering information ................................................................................................................. 18
7.2 Error codes...................................................................................................................................... 19
7.3 Document revision history ....................................................................................................... 19
2 MRCDB423_D00396_01_M_XXEN/06.2021

MRCDB423_D00396_01_M_XXEN/06.2021 3
LINETRAXX® MRCDB423
1 General instructions
1.1 How to use this manual
This manual is intended for qualified personnel working in electrical engineering and
electronics! Part of the device documentation, in addition to this manual, is the enclosed
"Safety instructions for Bender products".
Read the manual before mounting, connecting and commissioning the device.
Always keep the manual within easy reach for future reference.
1.2 Indication of important instructions and information
I Danger! Indicates a high risk of danger that will result in death or serious injury if not
avoided.
I Warning! Indicates a medium risk of danger that can lead to death or serious injury if not
avoided.
I Caution! Indicates a low-level risk that can result in minor or moderate injury or damage to
property if not avoided.
i
Information can help to optimise the use of the product.
1.3 Signs and symbols
Disposal Recycling Temperature range
Protect from moisture Protect from dust RoHS directives
Press button once Hold button for x seconds Element ashes
1.4 Training courses and seminars
www.bender.de/en -> Know-how -> Seminars.
1.5 Delivery conditions
The conditions of sale and delivery set out by Bender apply. These can be obtained from Bender
in printed or electronic format.
The following applies to software products:
"Software clause in respect of the licensing of standard software as part of deliveries,
modifications and changes to general delivery conditions for products and services in
the electrical industry."
1.6 Inspection, transport and storage
Die Elektroindustrie
x

4 MRCDB423_D00396_01_M_XXEN/06.2021
General instructions
Check the shipping and device packaging for transport damage and scope of delivery. The follow-
ing must be observed when storing the devices:
1.7 Warranty and liability
Warranty and liability claims in the event of injury to persons or damage to property are excluded
in case of:
• Improper use of the device.
• Incorrect mounting, commissioning, operation and maintenance of the device.
• Failure to observe the instructions in this operating manual regarding transport, com-
missioning, operation and maintenance of the device.
• Unauthorised changes to the device made by parties other than the manufacturer.
• Non-observance of technical data.
• Repairs carried out incorrectly.
• Use of accessories and spare parts not recommended by Bender.
• Catastrophes caused by external influences and force majeure.
• Mounting and installation with device combinations not recommended by the manufac-
turer.
This operating manual and the enclosed safety instructions must be observed by all persons
working with the device. Furthermore, the rules and regulations that apply for accident preven-
tion at the place of use must be observed.
1.8 Disposal of Bender devices
Abide by the national regulations and laws governing the disposal of this device.
For more information on the disposal of Bender devices, refer to
www.bender.de/en -> Service & support.

MRCDB423_D00396_01_M_XXEN/06.2021 5
LINETRAXX® MRCDB423
1.9 Safety
If the device is used outside the Federal Republic of Germany, the applicable local standards and
regulations must be complied with. In Europe, the European standard EN 50110 applies.
I Danger! Risk of electrocution due to electric shock! Touching live parts of the system
carries the risk of:
- A fatal electric shock
- Damage to the electrical installation
- Destruction of the device
Before installing and connecting the device, make sure that the installation has been de-
energised. The rules for working on electrical systems must be observed.
1.10 Intended use
The AC/DC sensitive MRCDB423 with the corresponding CTUB101-CTBC… measuring current
transformers and a circuit breaker according to IEC 60947-2 are used as additional protection
(protection against indirect contact) in earthed systems (TN and TT systems) in which AC or DC
fault currents may occur. Part of these systems are in particular loads with six-pulse rectifiers or
one-way rectifiers with smoothing, such as converters, battery chargers, construction site equip-
ment with frequency-controlled drives.
Since the values are measured with measuring current transformers, the MRCDB423 is almost in-
dependent of the nominal voltage and the operating current of the monitored system.
The response value IΔn2 , the response delay ton2 as well as the currently measured residual current
IΔare shown on the standard display.
Connection voltages and technical requirements for operating the device are specified in the
technical data. Any other use of the device than that described in this document is regarded as
improper.
Information on factory settings
How to reset the MRCDB423 to the factory settings is described in section 5.5 on page 12.
For a list of the factory settings, refer to section „5.6 Setting ranges and factory settings“
on page 12.

2 Function
2.1 Device features
• AC/DC sensitive MRCD type B in accordance with IEC 60947-2 Annex M
• Operating characteristic type B in accordance with IEC 60755
• RMS value measurement of the residual current
• Alarm and prewarning indication via display and LEDs
• Alarm and prewarning output via relays (K1/K2)
• Measuring current transformer connection monitoring
• Fault memory
2.2 Functional description
After connecting the supply voltage Us, the start-up delay is active. During start-up delay "t", the
device is in alarm state, which means that the output relays K1 and K2 are open and the installa-
tion is switched off. During start-up delay, changes on the measured residual currents do not in-
fluence the relays K1/K2. The residual current measurement is carried out via an external
CTUB101-CTBC20(P)...210(P) measuring current transformer. The currently measured value is indi-
cated on the LC display. This allows changes to be detected, e.g. when outgoing circuits are con-
nected to the system.
If the set value of the prewarning IΔn1 is exceeded, response delay ton1 starts. After ton1 has elapsed,
the output relay K1 switches and the prewarning LED lights up. The fault remains stored in the
device: The output relay K1 remains in alarm state and the prewarning LED lights until the reset
button "R" is pressed or the supply voltage is interrupted. The residual current measurement con-
tinues to be carried out.
If the set residual operating current IΔn2 is exceeded, response delay ton2 starts. After ton2 has
elapsed, output relays K1 and K2 switch. Output relay K2 trips the circuit breaker, which discon-
nects the outgoing circuit to be monitored. The prewarning and main alarm LEDs light up. The
fault remains stored in the device: Both output relays remain in alarm state and the LEDs light un-
til the reset button "R" is pressed or the supply voltage is interrupted.
Since the installation has been switched off, residual current measurement is no longer possible.
After switching off, an automatic offset measurement is carried out. The described device combi-
nation meets the requirements of IEC 60947-2 Annex M for an MRCD protective device.
The device function can be tested using the test button "T". Parameters are assigned to the device
via the LCD and the control buttons on the front panel; this function is password-protected.
6 MRCDB423_D00396_01_M_XXEN/06.2021
Function

2.3 Standard display
The standard display shows the following:
• Residual operating current IΔn2
• Response delays ton2
• Residual current (present measured value)
The displayed values change periodically every 4 s.
2.4 Connection monitoring
The connections to the measuring current transformer are continuously monitored. In case of a
transformer connection fault, the output relays K1 and K2 switch, all LEDs flash. In addition, the
error code "E.01" appears on the display. Output relay K2 trips the circuit breaker, which discon-
nects the outgoing circuit to be monitored. When the connection fault has been eliminated and
the reset button "R" is pressed, the output relays K1 and K2 switch back to their initial position.
2.5 Manual self test
The device carries out a self test by pressing and holding the test button "T" (> 2 s), during which
any internal malfunctions are detected and displayed as an error code.
The output relays K1/K2 are switched so that the circuits breakers disconnects. After switching off,
the MRCDB423 carries out an offset calibration.
i
Due to this offset calibration, the self test must not be carried out without a circuit break-
er connected, which will shut down the installation. Otherwise, the measurement func-
tion may be faulty after the self test has been performed.
This function prevents long-term drifting.
While pressing and holding the test button "T", all device-relevant display elements are shown.
2.6 Malfunction
In the event of an internal malfunction, all three LEDs flash. The display shows an error code
(E.01…E.32). In such cases, please contact the Bender Service.
MRCDB423_D00396_01_M_XXEN/06.2021 7
LINETRAXX® MRCDB423

2.7 Time delays t and ton
The times tand ton described below delay the signalling of prewarning and main alarm via LEDs
and the output relays.
2.7.1 Start-up delay t
After the supply voltage Ushas been switched on, the device is in alarm state, which means that
the output relays K1 and K2 are open and the installation is switched off. This parameter cannot
be adjusted.
2.7.2 Response delay ton1/2
When exceeding a response value IΔn1/2, the MRCDB423 requires the response time tan to output
the alarm. A set response delay ton1/2 (0…10 s) is added to the device-specific operating time tae
and delays signalling.
(Total delay time tan = tae + ton).
If the fault does not persist during the response delay, the alarm is not signalled.
i
If IΔn2 is set to 30 mA (personal protection), the response delay ton2 of K2 is automatically
and invariably set to 0s.
2.8 External, combined test or reset button T/R
Reset = pressing the external button briefly (< 1 s)
Test = pressing and holding the external button (> 2 s)
The device function can be tested using the test button "T".
2.9 Device parameter settings
The device parameters are set via the control buttons on the front. The device parameter settings
are password-protected.
8 MRCDB423_D00396_01_M_XXEN/06.2021
Function

3 Dimensions and mounting
3.1 Dimensions
Abb. 3–1 Dimensions in mm
3.2 Mounting
Variant A: DIN rail mounting Variant B: screw mounting
The front plate cover can be opened at the lower part marked with an arrow.
36
2
2
45
67,5
93
74
1.
2.
3. Click!
&2 x
1 x
100 107
Click
M4
M4
!
MRCDB423_D00396_01_M_XXEN/06.2021 9
LINETRAXX® MRCDB423

4 Connection
I Danger! Risk of fatal injury due to electric shock! Touching live system parts can result
in fatal injuries. Ensure that there is no voltage in the installation area and follow the
rules for working on electrical equipment.
Terminal Connections
A1, A2 Connection to supply voltage Us
1Socket for connection cable of measuring current transformer
T/R Connection for a combined external test and reset button
11, 12, 14 Output relay K1 (alarm)
21, 22, 24 Output relay K2
i
To comply with IEC 60947-2 Annex M, the MRCDB423 must be operated according to the N/C
principle in combination with a circuit breaker with undervoltage release or shunt trip. The
circuit breaker must be able to switch off in less than 17 ms and comply with the IEC 60947-2
standard.
I Warning! An electric shock caused by excessively high fault currents can result in serious
injuries or death. The MRCDB423 device must not be operated without a circuit breaker and
must only be used in switching applications! After the output relay K2 switches off, an automa-
tic offset measurement is carried out, which takes an existing fault current as the basis for the
calibration. This may cause the protection to fail because the system does not switch off if the
fault current is too high.
> U F 6A
L1
L2
L3
N
~
3~
CTBCx CTUB101
+12V -12V TGND
S1(k) S2(l)
CTX...
MRCDB423
10 MRCDB423_D00396_01_M_XXEN/06.2021
Connection

5 Operation and settings
5.1 Function of the operating elements
Device front Element Function
ON (green) lights continuously: Power On LED,
flashes: system fault or malfunction of connec-
tion monitoring
AL1
AL2
Alarm LED lights (yellow): response value IΔn1
LED TRIP lights (yellow): response value IΔn2
13 mA
M
13 mA flow through the measuring current
transformer,
fault memory active
T

Standard display: (> 2 s): display test, self test
Menu display: arrow-up button (< 1 s)
R

Standard display: Reset button; (> 2 s): Clearing
the fault memory
menu display: arrow-down button (< 1 s)
MENU
(< 1s)
(> 2 s)
Standard display:
Menu display: Enter button
• Confirm menu item, submenu item and value.
• Back to the next higher menu level
5.2 Display elements
The display elements are shown for one second when a device test is started. The following table
lists the elements that are linked to functions.
Element Function
I2 Response value IΔn2 in mA
I1 Response value IΔn1 in % of IΔn2
ton1
ton2
Response delay ton1 (K1)
Response delay ton2 (K2)
MFault memory active
Password protection enabled
5.3 Meaning of the LEDs
Meaning ON AL1 AL2
Error message (system error)
Prewarning
Message, Test IΔn1 or
Residual operating current IΔn2 reached
I∆n
AL2AL1
M
H
y
s
offont
A m
k
s
>
>
n
1 2
R l .
MRCDB423_D00396_01_M_XXEN/06.2021 11
LINETRAXX® MRCDB423

5.4 Standard display
On the standard display, the device alternately shows the following information during operation:
5.5 Menu structure
5.6 Setting ranges and factory settings
Menu Parameter Description Range Factory settings
AL I2 > Response value I2; "Greater than" compar-
ison
30 mA…3.0 A 30 mA
I1 > Response value I1; "Greater than" compar-
ison
50…100 % 50 %
tton1 Response delay output relay 1 0…10 s 1 s
ton2 Response delay output relay 2 0…10 s 0 s
Set ––– Password for parameter setting off/000…999 000
FAC Reset to factory settings YES / no no
SYS Service menu (locked) 000…999 –
InF –Software version
HiS –Display memory for the first fault
M
A m
M
A m
>
2
l
M
ont
s
2
3 s3 s
currently measured value set response value set response delay time
2
PIN
P1
. . .
Pn
ESC
2
Idn
t
SEt
InF
HiS
ESC
2
M
A m
1x
AL1 AL2
Reset
2
M
A m
AL1
AL2
M
H
y
s
oont
A m
k
s
>
>
n
1 2
R l .
Test
2
M
A m
Parameter input
12 MRCDB423_D00396_01_M_XXEN/06.2021
Operation and settings

5.7 Parameter input
5.7.1 Idn menu
Setting of the response values for the alarm Idn (mA) and the prewarning (%)
5.7.2 t menu
Setting of the response delay times ton1 and ton2
1
ont
s
1
ont
s
1
ont
s
1
2
s
2
ont
s
2
ont
s
2
ont
2
A m
>
2
l
A m
>
2
l
A m
>
2
l
2
>
1
l
>
1
l
>
1
l
2
MRCDB423_D00396_01_M_XXEN/06.2021 13
LINETRAXX® MRCDB423

5.7.3 SEt menu
Reset to factory settings
System
5.7.4 InF menu
The menu displays the software version of the device. The first pass is automatic; afterwards all
characters can be displayed with the T button (back) and the R button (forward).
Press ESC to return to the menu selection.
5.7.5 HiS menu
The History menu displays the value in the fault memory and clears it on request (CLr).
Press ESC to return to the menu selection.
14 MRCDB423_D00396_01_M_XXEN/06.2021
Operation and settings

6 Measuring current transformers
CTUB101-CTBC… series measuring current transformers in combination with MRCDs convert AC
and DC currents into an evaluable measuring signal. They can be used in DC, AC, and 3(N)AC sys-
tems. The shielded measuring current transformers of the CTUB101-CTBC…P series also feature a
full magnetic shield to prevent nuisance tripping due to external influences.
6.1 Wiring diagram
i
The measuring range must be set according to the response values in the evaluator. It is
imperative to observe the manual of the respective measuring current transformer.
6.2 Dimension diagrams
CTX-…
CTBCx
CTUB101
+12V -12V TGND
S1(k)S2(l)
1 m
2,5 m
5 m
10 m
50 mm
250 mm
CTX-…
CTBCx
CTUB101
+12V -12V TGND
S1(k)S2(l)
1 m
2,5 m
5 m
10 m
50 mm
250 mm
MRCDB423
d
b
gf
k
c
a e
A
g
a
d
e
c
f
b
D
d
a
e
b
c
C
d
e
f
c
b
a
B
Dimensions (mm), tolerance: ±0.5 mm
Type a b c d e f g
ACTUB…-CTBC20(P) 75 83 37 ø 20 46 60.5 –
CTUB…-CTBC35(P) 97 130 47 ø 35 46 61 –
B
CTUB…-CTBC60(P)
126
151
57
ø 60
56
78
–
CCTUB…-CTBC120(P) 188 225 96 ø 120 65 96 139
CTUB…-CTBC210(P)
302
339
153
ø 210
67
113
277
D
CTUB…
74
44
30
32
4.6
–
–
MRCDB423_D00396_01_M_XXEN/06.2021 15
LINETRAXX® MRCDB423

6.3 Fastening
6.4 Mounting instructions
6.5 Shielded measuring current transformer variants
When used in outgoing circuits with high load or inrush currents, local saturations of the magnet-
ic core material of the measuring current transformers can occur. It is therefore recommended to
use the shielded P versions to prevent nuisance tripping.
The values are listed in the technical data and refer to a correctly selected internal diameter of the
measuring current transformer: d2 ≥ 2 x d1 (cable diameter).
a
b
c
CTBC20(P), CTBC35(P)
a
b
c
CTBC60(P)
a
b
c
CTBC120(P) ... CTBC210(P)
Type a b c
CTBC20(P) 31.4 49 2 x ø 5.5
CTBC35(P) 49.8 49 2 x ø 5.5
CTBC60(P) 56 66 3 x ø 6.5
CTBC120(P) 103 81 4 x ø 6.5
CTBC210(P) 180 98 4 x ø 6.5
All current-carrying cables must be routed together through
the measuring current transformer. Never route an existing
protective conductor through the measuring current trans-
former.
PE
L1L2L3N
P1 (K): YE P2 (L): GY
*
*
The primary conductors may only be bent from the specified
minimum distance. The minimum bending radius specified by
the manufacturers must be observed.
* Distance to 90° angle = 2 x external diameter
The cables must be centred in the measuring current trans-
former. To prevent nuisance tripping, the measuring current trans-
formers should not be completely filled with cables. The inter-
nal diameter of the current transformer should be at least
twice the diameter of the conductor bundle to be measured.
The following applies: d2 ≥ 2 x d1
16 MRCDB423_D00396_01_M_XXEN/06.2021
Measuring current transformers

7 Technical data
Insulation coordination acc. to IEC 60664-1/
IEC 60664-3
MRCDB423-D-1:
Rated voltage....................................................................100 V
Overvoltage category/pollution degree............................... III/2
Rated impulse voltage .................................................... 2.5 kV
MRCDB423-D-2:
Rated voltage .................................................................. 250 V
Overvoltage category/pollution degree............................... III/2
Rated impulse voltage ....................................................... 4 kV
Protective separation (reinforced insulation) between................
........................... (A1, A2) - (k, l, T/R) - (11, 12, 14) - (21, 22, 24)
Voltage tests acc. to IEC 61010-1.....................................2.21 kV
Supply voltage
MRCDB42-D-1:
Supply voltage range US.............................................................
..................................................... AC 24…60 V / DC 24…78 V
Operating range supply voltage US.............................................
.................................................... AC 16…72 V / DC 9.6…94 V
Frequency range US..........................................DC, 42…460 Hz
MRCDB423-D-2:
Supply voltage range US..............................AC/DC 100…250 V
Operating range supply voltage US................AC/DC 70…300 V
Frequency range US..........................................DC, 42…460 Hz
Power consumption.......................................................≤ 6.5 VA
Measuring circuit
External measuring current transformer type..............................
.............................. CTUB101 - CTBCxx(P); CTUB101 - CTBCxxx(P)
Rated voltage (measuring current transformer) .................800 V
Operating characteristic in accordance with IEC 6075........type B
Rated frequency..................................................... 0…2 000 Hz
Operating uncertainty...................................................0…35 %
Response values
Rated residual operating current IΔn1............................................
.......................................................... 50…100 % of IΔn2 (50 %)*
Rated residual operating current IΔn2............................................
.................................................................30 mA…3 A (30 mA)*
Time response
Start-up delay t................................................................. (1 s)*
Response delay ton1 ...............................................0…10 s (1 s)*
Response delay ton2 ...............................................0…10 s (0 s)*
Operating time tae at IΔn = 1 x IΔn1/2 ............................. ≤ 180 ms
Operating time tae at IΔn = 5 x IΔn1/2 ............................... ≤ 23 ms
Response time tan ...............................................tan = tae + ton1/2
Recovery time tb........................................................... ≤ 300 ms
Displays, memory
Display range measured value AC/DC ..............................0…6 A
Error of measured value display.................... ±17.5 % / ±2 digit
Measured-value memory for alarm value Data record measured
values
Password .................................................off / 000…999 (000)*
Fault memory output relay ................................................... yes
Inputs/outputs
Cable length for external test/reset button ....................0…3 m
Cable length for measuring current transformer connection.......
0…3 m
Switching elements
Number of switching elements ........... 2 x 1 changeover contact
Operating principle................................................N/C operation
Electrical endurance, number of cycles .......................................
...........................................................................................10000
Contact data acc. to IEC 60947-5-1:
Utilisation category......... AC-13 AC-14 DC-12 DC-12 DC-12
Rated operational voltage230 V 230 V 24 V 110 V 220 V
for UL...............................200 V 200 V 24 V 110 V 200 V
Rated operational current. 5 A 3 A 1 A 0.2 A 0.1 A
Minimum contact rating ......................... 1 mA at AC/DC ≥ 10 V
Environment/EMC
EMC ....... IEC 60947-2 Annex M (limit value class A according to
CISPR11)
Operating temperature .........................................-25…+55 ºC
Transport ...............................................................-25…+70 °C
Long-term storage.................................................-25…+55 °C
Classification of climatic conditions acc. to IEC 60721
Stationary use (IEC 60721-3-3)............................................3K23
.................................(except condensation and formation of ice)
Transport (IEC 60721-3-2) ...................................................2K11
Long-term storage (IEC 60721-3-1).................................... 1K22
Classification of mechanical conditions acc. to IEC 60721
Stationary use (IEC 60721-3-3)...........................................3M11
Transport (IEC 60721-3-2) ................................................... 2M4
Long-term storage (IEC 60721-3-1)....................................1M12
Connection
Connection type......................................... screw-type terminals
Connection properties:
Rigid/flexible ............... 0.2…4/0.2…2.5 mm2 (AWG 24…12)
Multi-conductor connection (2 conductors with the same
cross section):
Rigid/flexible ..................................... 0.2…1.5/0.2…1.5 mm2
Stripping length.......................................................... 8…9 mm
Tightening torque................................................. 0.5…0.6 Nm
MRCDB423_D00396_01_M_XXEN/06.2021 17
LINETRAXX® MRCDB423

Other
Operating mode ....................................... continuous operation
Position of normal use...................................... display-oriented
Degree of protection, internal components (IEC 60529).......IP30
Degree of protection, terminals (IEC 60529)........................ IP20
Enclosure material ............................................... polycarbonate
Flammability class ......................................................... UL94V-0
DIN rail mounting acc. to ............................................. IEC 60715
Screw fixing ..................................... 2 x M4 with mounting clip
Weight............................................................................ ≤ 150 g
7.1 Ordering information
MRDCB423-D-1 MRDCB423-D-2
Order number B94043055 B94043056
Response range 30 mA…3 A 30 mA…3 A
Rated frequency 0…2000 Hz 0…2000 Hz
Supply voltage USDC 9.6…94 V /
AC 42…460 Hz, 16…72V
DC 70…300 V /
AC 42…460 Hz, 70…300V
Measuring current transformer type Ø Art. No.
CTUB101-CTBC20
CTUB101-CTBC20P (shielded) 20 mm B78120010 B78120020
CTUB101-CTBC35
CTUB101-CTBC35P (shielded) 35 mm B78120012 B78120022
CTUB101-CTBC60
CTUB101-CTBC60P (shielded) 60 mm B78120014 B78120024
CTUB101-CTBC120
CTUB101-CTBC120P (shielded) 120 mm B78120016 B78120026
CTUB101-CTBC120
CTUB101-CTBC120P (shielded) 210 mm B78120018 B78120028
18 MRCDB423_D00396_01_M_XXEN/06.2021
Technical data

7.2 Error codes
Error code Meaning
E.01 Error measuring current transformer monitoring
Actions:
– Check transformer connection for short circuit or interruption.
– Check the measuring range setting on the potentiometer of the measuring current trans-
former and adjust it to the response value set on the MRCDB423.
The error code will be deleted once the error has been eliminated and the reset button has
been pressed.
E.02 Error measuring current transformer monitoring during a manual self test
Action:
– Check transformer connection for short circuit or interruption.
The error code will be deleted once the error has been eliminated, the manual self test has
been run again (test button "T") and the reset button "R" has been pressed.
E. … Error codes > 02
Action:
– Perform a reset. Restore the factory settings of the device.
The error code will be deleted automatically once the error has been eliminated. Should the
error persist, please contact the Bender Service.
7.3 Document revision history
Date Document version Software version Changes
05/2021 01 V 1.03 - Set in DIN A5 format
- "Intended use" has been changed
- Warning text below wiring diagram (p.10),
- Several textual amendments
MRCDB423_D00396_01_M_XXEN/06.2021 19
LINETRAXX® MRCDB423

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Postfach 1161 • 35301 Grünberg • Deutschland
Londorfer Str. 65 • 35305 Grünberg • Deutschland
Tel.: [phone] • Fax: [phone]
E-mail: [email protected] • www.bender.de
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Reprinting and duplicating
only with permission of the publisher.
Bender GmbH & Co. KG
PO Box 1161 • 35301 Grünberg • Germany
Londorfer Str. 65 • 35305 Grünberg • Germany
Tel.: [phone] • Fax: [phone]
E-mail: [email protected] • www.bender.de
MRCDB423_D00396_01_M_XXEN/06.2021/ pdf / © Bender GmbH & Co. KG, Germany – Subject to change!The specied standards take into account the edition valid until 06/2021 unless otherwise indicated.