Bender RCMA420 User manual

Manual
EN
RCMA420
Residual current monitor
for monitoring AC, DC and pulsed DC currents
in TN and TT systems
Software version D242 V1.2x
RCMA420_D00059_02_M_XXEN/06.2016

Bender GmbH & Co. KG
P.O. Box 1161 • 35301 Gruenberg • Germany
Londorfer Strasse 65 • 35305 Gruenberg • Germany
Tel.: [phone] • Fax: [phone]
E-Mail: [email protected] • www.bender.de
©Bender GmbH & Co. KG
All rights reserved.
Reprinting only with permission of the publisher.
Subject to change!
Photos: Bender archives

Table of Contents
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RCMA420_D00059_02_M_XXEN/06.2016
1. Important information .................................................................................... 5
1.1 How to use this manual ................................................................................. 5
1.2 Technical support: service and support ................................................... 6
1.2.1 First level support ............................................................................................. 6
1.2.2 Repair service ..................................................................................................... 6
1.2.3 Field service ........................................................................................................ 7
1.3 Training courses ................................................................................................ 8
1.4 Delivery conditions .......................................................................................... 8
1.5 Inspection, transport and storage .............................................................. 8
1.6 Warranty and liability ...................................................................................... 9
1.7 Disposal ............................................................................................................ 10
2. Safety instructions ......................................................................................... 11
2.1 General safety instructions ........................................................................ 11
2.2 Work activities on electrical installations ............................................. 11
2.3 Intended use ................................................................................................... 12
3. Function ........................................................................................................... 13
3.1 Device features .............................................................................................. 13
3.2 Function ............................................................................................................ 13
3.2.1 Connection monitoring .............................................................................. 14
3.2.2 Fast response value query ......................................................................... 14
3.2.3 Automatic self test ........................................................................................ 14
3.2.4 Manual self test .............................................................................................. 15
3.2.5 Functional faults ............................................................................................ 15
3.2.6 Set the number of reload cycles .............................................................. 15
3.2.7 Assigning alarm categories to alarm relays K1/K2 ............................ 15
3.2.8 Time delays t, ton and toff ....................................................................... 16
3.2.9 Residual current monitoring in window discriminator mode ...... 16
3.2.10 Password protection (on, OFF) ................................................................. 16

Table of Contents
4RCMA420_D00059_02_M_XXEN/06.2016
3.2.11 Factory setting FAC ...................................................................................... 17
3.2.12 Erasable history memory ............................................................................ 17
3.2.13 External, combined test/reset button T/R ............................................ 17
3.2.14 Fault memory .................................................................................................. 17
4. Installation and connection ......................................................................... 19
5. Operation and setting .................................................................................. 21
5.1 Display elements in use .............................................................................. 21
5.2 Function of the operating elements ...................................................... 22
5.3 Menu structure ............................................................................................... 23
5.4 Display in standard mode .......................................................................... 24
5.5 Display in menu mode ................................................................................ 25
5.5.1 Parameter query and setting: overview ................................................ 25
5.5.2 Changeover : overcurrent/undercurrent/window mode ............... 27
5.5.3 Response value setting for overcurrent: ............................................... 28
5.5.4 Setting the fault memory and alarm relay operating mode .......... 29
5.5.5 Assigning alarm categories to the alarm relays ................................. 30
5.5.6 Set the time delays ....................................................................................... 32
5.5.7 Changing from overcurrent operation to window operation ...... 33
5.5.8 Factory setting and password protection ............................................ 33
5.5.9 Restoring factory settings .......................................................................... 35
5.5.10 Device information query (Example) ..................................................... 35
5.5.11 History memory query ................................................................................. 36
5.6 Commissioning .............................................................................................. 36
5.7 Factory setting ................................................................................................ 36
5.8 Error codes ....................................................................................................... 37
6. Technical data ................................................................................................ 39
6.1 Data in tabular form ..................................................................................... 39
6.2 Standards, approvals and certifications ................................................ 42
6.3 Ordering information ................................................................................... 43
INDEX .................................................................................................................... 45

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RCMA420_D00059_02_M_XXEN/06.2016
1. Important information
1.1 How to use this manual
Always keep this manual within easy reach for future reference.
To make it easier for you to understand and revisit certain sections in
this manual, we have used symbols to identify important instructions
and information. The meaning of these symbols is explained below:
This manual is intended for qualified personnel working in
electrical engineering and electronics!
This signal word indicates that there is a high risk of danger
that will result in electrocution or serious injury if not
avoided.
This signal word indicates a medium risk of danger that
can lead to death or serious injury if not avoided.
This signal word indicates a low level risk that can result in
minor or moderate injury or damage to property if not
avoided.
This symbol denotes information intended to assist the user
in making optimum use of the product.
DANGER
WARNING
CAUTION

Important information
6RCMA420_D00059_02_M_XXEN/06.2016
This manual has been compiled with great care. It might nevertheless
contain errors and mistakes. Bender cannot accept any liability for
injury to persons or damage to property resulting from errors or
mistakes in this manual.
1.2 Technical support: service and support
For commissioning and troubleshooting Bender offers you:
1.2.1 First level support
Technical support by phone or e-mail for all Bender products
 Questions concerning specific customer applications
 Commissioning
 Troubleshooting
Telephone: [phone]*
Fax: [phone]
In Germany only: 0700BenderHelp (Tel. and Fax)
E-mail: [email protected]
1.2.2 Repair service
Repair, calibration, update and replacement service for Bender
products
 Repairing, calibrating, testing and analysing Bender products
 Hardware and software update for Bender devices
 Delivery of replacement devices in the event of faulty or incorrectly
delivered Bender devices
 Extended guarantee for Bender devices, which includes an in-house
repair service or replacement devices at no extra cost

Important information
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RCMA420_D00059_02_M_XXEN/06.2016
Telephone: [phone]** (technical issues)
[phone]**, -785** (sales)
Fax: [phone]
E-mail: [email protected]
Please send the devices for repair to the following address:
Bender GmbH, Repair-Service,
Londorfer Str. 65,
35305 Grünberg
1.2.3 Field service
On-site service for all Bender products
 Commissioning, configuring, maintenance, troubleshooting of Bender
products
 Analysis of the electrical installation in the building (power quality test,
EMC test, thermography)
 Training courses for customers
Telephone: [phone]**, -762 **(technical issues)
[phone]** (sales)
Fax: [phone]
E-mail: [email protected]
Internet: www.bender-de.com
*Available from 7.00 a.m. to 8.00 p.m. 365 days a year (CET/UTC+1)
**Mo-Thu 7.00 a.m. - 8.00 p.m., Fr 7.00 a.m. - 13.00 p.m

Important information
8RCMA420_D00059_02_M_XXEN/06.2016
1.3 Training courses
Bender is happy to provide training regarding the use of test
equipment.
The dates of training courses and workshops can be found on the
Internet at www.bender-de.com -> Know-how -> Seminars.
1.4 Delivery conditions
Bender sale and delivery conditions apply.
For software products the "Softwareklausel zur Überlassung von
Standard-Software als Teil von Lieferungen, Ergänzung und
Änderung der Allgemeinen Lieferbedingungen für Erzeugnisse und
Leistungen der Elektroindustrie" (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) set out by the ZVEI (Zentralverband
Elektrotechnik- und Elektronikindustrie e. V.) (German Electrical and
Electronic Manufacturer's Association) also applies.
Sale and delivery conditions can be obtained from Bender in printed
or electronic format.
1.5 Inspection, transport and storage
Inspect the dispatch and equipment packaging for damage, and
compare the contents of the package with the delivery documents. In
the event of damage in transit, please contact Bender immediately.
The devices must only be stored in areas where they are protected
from dust, damp, and spray and dripping water, and in which the
specified storage temperatures can be ensured.

Important information
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RCMA420_D00059_02_M_XXEN/06.2016
1.6 Warranty and liability
Warranty and liability claims in the event of injury to persons or
damage to property are excluded if they can be attributed to one or
more of the following causes:
 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, commissioning, 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 and the use of replacement parts or
accessories not approved by the manufacturer.
 Catastrophes caused by external influences and force majeure.
 Mounting and installation with device combinations not recom-
mended by the manufacturer.
This operating manual, especially the safety instructions,
must be observed by all personnel working on the device.
Furthermore,
the rules and regulations that apply for accident prevention at the
place of use must be observed.

Important information
10 RCMA420_D00059_02_M_XXEN/06.2016
1.7 Disposal
Abide by the national regulations and laws governing the disposal of
this device. Ask your supplier if you are not sure how to dispose of the
old equipment.
The directive on waste electrical and electronic equipment (WEEE
directive) and the directive on the restriction of certain hazardous
substances in electrical and electronic equipment (RoHS directive)
apply in the European Community. In Germany, these policies are
implemented through the "Electrical and Electronic Equipment Act"
(ElektroG). According to this, the following applies:
 Electrical and electronic equipment are not part of household waste.
 Batteries and accumulators are not part of household waste and must
be disposed of in accordance with the regulations.
 Old electrical and electronic equipment from users other than private
households which was introduced to the market after 13 August 2005
must be taken back by the manufacturer and disposed of properly.
For more information on the disposal of Bender devices, refer to our
homepage at www.bender-de.com -> Service & support.

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RCMA420_D00059_02_M_XXEN/06.2016
2. Safety instructions
2.1 General safety instructions
Part of the device documentation in addition to this manual is the
enclosed "Safety instructions for Bender products".
2.2 Work activities on electrical installations
If the device is used outside the Federal Republic of Germany, the
applicable local standards and regulations must be complied with.
The European standard EN 50110 can be used as a guide.
Only qualified personnel are permitted to carry out the
work necessary to install, commission and run a device or
system.
Risk of electrocution due to electric shock!
Touching live parts of the system carries the risk of:
 An 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. Observe the
rules for working on electrical installations.
DANGER

Safety instructions
12 RCMA420_D00059_02_M_XXEN/06.2016
2.3 Intended use
The AC/DC sensitive residual current monitor RCMA420 is designed
for use in earthed systems (TN and TT systems) where DC and AC fault
currents may occur. These are in particular loads containing six-pulse
rectifiers or one way rectifiers with smoothing, such as converters,
battery chargers, construction site equipment with frequency-
controlled drives.
Two separately adjustable response ranges allow to distinguish
between prewarning (IΔn1 = 50…100 % of the set response value
IΔn2) and alarm ( IΔn2). Since the values are measured with measuring
current transformers, the RCMA is nearly independent of the nominal
voltage and the load current of the system being monitored.
In order to meet the requirements of the applicable standards,
customised parameter settings must be made on the equipment in
order to adapt it to local equipment and operating conditions. Please
heed the limits of the range of application indicated in the technical
data.
Any use other than that described in this manual is regarded as
improper.

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RCMA420_D00059_02_M_XXEN/06.2016
3. Function
3.1 Device features
 AC/DC sensitive residual current monitor Type B according to
IEC 62020 and IEC 60755
 Two separately adjustable response ranges (prewarning, alarm)
 Adjustable switching hysteresis
 r.m.s. value measurement
 Starting delay, response delay and delay on release
 Measured value display via multi-functional LC display
 Alarm indication via LEDs (AL1, AL2) and changeover contacts (K1, K2)
 N/C operation or N/O operation selectable
 Password protection against unauthorized parameter changing
 Fault memory function can be switched off
 CT connection monitoring
3.2 Function
Once the supply voltage Usis applied, the starting delay is activated.
Measured values changing during this time do not influence the
switching state of the alarm relays. Residual current measurement
takes place via an external measuring current transformer of the
W20AB…W60AB series. The currently measured value is shown on
the LC display. In this way any changes, for example when circuits are
connected to the system, can be recognized easily. If the measured
value exceeds one or both response values, the response delays ton1/
2start running. Once the response delay ton1/2 has elapsed, the K1/K2
alarm relays switch and the alarm LEDs AL1/AL2 light up. If the
residual current falls below the release value (response value minus
hysteresis), the delay on release toff begins. Once the release delay toff

Function
14 RCMA420_D00059_02_M_XXEN/06.2016
has elapsed, the alarm relays return to their original state and the
alarm LEDs AL1/AL2 go out. If the fault memory is activated, the alarm
relays remain in the alarm state and the LEDs light until the reset
button is pressed or until the supply voltage is interrupted. The
device function can be tested using the TEST button. The
parameterization of the device can be carried out via the LC display
and the function keys integrated in the front plate and can be
password-protected.
3.2.1 Connection monitoring
The CT connections are continuously monitored. In the event of a
fault, the alarm relays K1 / K2 switch without delay, the alarm LEDs
AL1 / AL2 / ON flash (Error Code E.01). After eliminating the fault, the
alarm relays automatically return to their initial position, provided
that the fault memory M is deactivated. With the fault memory
activated, K1/K2 return to their initial position by pressing the reset
button R. A second cascaded measuring current transformer will not
be monitored.
3.2.2 Fast response value query
With the display in standard mode, the currently measured response
values IΔn1 and IΔn2 can be queried pressing the Up and Down keys (
< 1.5 s). Switchover to the Menu mode is not required. If you want to
exit the fast response value query, press the enter key.
3.2.3 Automatic self test
The device automatically carries out a self test after connecting to the
system to be monitored and later every 24 hours. During the self test
internal functional faults will be detected and appear in form of an
error code on the display. The alarm relays are not checked during
this test.

Function
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RCMA420_D00059_02_M_XXEN/06.2016
3.2.4 Manual self test
After pressing the test button for > 1.5 s, the device carries out a self
test. During this test, internal functional faults are detected and will
be displayed in form of an error code. The alarm relays are not
checked during this test.
While the test button T is pressed and held down, all device-related
display elements appear on the display.
3.2.5 Functional faults
If an internal functional fault occurs, all three LEDs flash. An error code
will appear on the display (E01…E32). In such a case please contact
the Bender Service.
3.2.6 Set the number of reload cycles
If faults occur only temporarily, but recurrently, in the system being
monitored, with the fault memory M deactivated, the alarm relays
would switch synchronously to the error status.
RL in the out menu can be used to limit the number of these
changeover processes. As soon as the preset number of switching
cycles is exceeded, the fault memory will come on and an activated
alarm remains stored.
3.2.7 Assigning alarm categories to alarm relays K1/K2
The alarm categories device error, residual current IΔn1, residual
current IΔn2 or alarm by device test can be assigned to the alarm
relays via the "out" menu.

Function
16 RCMA420_D00059_02_M_XXEN/06.2016
3.2.8 Time delays t, ton and toff
The times t, ton and toff, described below, delay the output of alarms
via LEDs and relays.
Starting delay t
After connection to the supply voltage, the alarm indication is
delayed by the preset time t(0…10 s).
Response delay ton1/2
If the residual current increases above or falls below the response
value the response time tan expires. After the expiry of the response
time an alarm is signalled. A set response delay ton1/2 (0…10 s) adds
up to the device-related operating time tae and delays alarm
signalling (total delay time tan = tae + ton).
If the residual current fault changes from a value above the response
value to a value below the response value, an alarm will not be
signalled.
Delay on release toff
When no alarm exists after deactivating the fault memory, the alarm
LEDs go out and the alarm relays switch back to their initial position.
After activating the delay on release (0…99 s), the alarm state is
continuously maintained for the selected period.
3.2.9 Residual current monitoring in window discriminator mode
Change the measuring principle by selecting the window mode (SEt
/ In). In the window discriminator mode, the threshold values I1 and
I2 represent the upper and the lower value. If the measured value is
not within this area, an alarm is initiated by the device. See page 33.
3.2.10 Password protection (on, OFF)
When the password protection is activated (on), settings are only
possible after entering the correct password (0…999).

Function
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RCMA420_D00059_02_M_XXEN/06.2016
3.2.11 Factory setting FAC
After activating the factory setting, all settings previously changed
are reset to delivery status.
3.2.12 Erasable history memory
The first alarm value that occurs will be saved in this memory. The
memory can be cleared via the menu HiS.
3.2.13 External, combined test/reset button T/R
Reset = Pressing the external button < 1.5 s
Test = Pressing the external button > 1.5 s
3.2.14 Fault memory
The fault memory can be activated, deactivated or set to continuous
mode (con). If the fault memory is set to "con" mode, the alarm
parameters remain stored even on failure of the supply voltage.
Stored alarms can be reset by means of the reset button R.

Function
18 RCMA420_D00059_02_M_XXEN/06.2016

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RCMA420_D00059_02_M_XXEN/06.2016
4. Installation and connection
Dimension diagram, drawing for screw mounting, push-wire ter-
minal connection
Only qualified personnel are permitted to carry out the
work necessary to install, commission and run a device or
system.
Risk of electrocution due to electric shock!
Touching live parts of the system carries the risk of:
 An 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. Observe the
rules for working on electrical installations.
DANGER
1
2
3
90 mm
45
67,5
36 mm
31,1
47,5
70,5
100 mm
116 mm
Zubehör/
Accessory

Installation and connection
20 RCMA420_D00059_02_M_XXEN/06.2016
The front plate cover is easy to open at the lower part marked by an
arrow.
1. DIN rail mounting:
Snap the rear mounting clip of the device into place in such a way that
a safe and tight fit is ensured.
Screw fixing:
Use a tool to move the rear mounting clips (a second mounting clip
required, see ordering information) to a position that it projects bey-
ond the enclosure. Then fix the device using two M4 screws.
2. Wiring: Connect the device according the wiring diagram.
Terminal Connections
A1, A2 Connection to supply voltage
1Socket for the connecting cable WX… to the measuring CT
T/R Connection to the combined test/reset button
11, 12, 14 Alarm relay K1
21, 22, 24 Alarm relay K2
T/R
11 1412
21 2422
A2A1
T/R
WX...
1234
kl
+
-
k
l
-
GND
+
W...AB
1
a
b
ab
T
T
GND