Bender RCMA420-DM User manual

Manual
EN
RCMA420-DM
Residual current monitor
for monitoring AC, DC and pulsed currents
in TN and TT systems with an analogue interface
Software version: D242 V1.2x
RCMA420-DM_D00060_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-DM_D00060_02_M_XXEN/06.2016
1. Important information .................................................................................... 7
1.1 How to use this manual ................................................................................. 7
1.2 Technical support: service and support ................................................... 8
1.2.1 First level support ............................................................................................. 8
1.2.2 Repair service ..................................................................................................... 8
1.2.3 Field service ........................................................................................................ 9
1.3 Training courses ............................................................................................. 10
1.4 Delivery conditions ....................................................................................... 10
1.5 Inspection, transport and storage ........................................................... 10
1.6 Warranty and liability ................................................................................... 11
1.7 Disposal ............................................................................................................ 12
2. Safety instructions ......................................................................................... 13
2.1 General safety instructions ........................................................................ 13
2.2 Work activities on electrical installations ............................................. 13
2.3 Intended use ................................................................................................... 14
3. Function ........................................................................................................... 15
3.1 Device features .............................................................................................. 15
3.2 Function ............................................................................................................ 15
3.2.1 Connection monitoring .............................................................................. 16
3.2.2 Fast response value query ......................................................................... 16
3.2.3 Automatic self test ........................................................................................ 16
3.2.4 Manual self test .............................................................................................. 16
3.2.5 Functional faults ............................................................................................ 16
3.2.6 Start-up delay t ............................................................................................... 17
3.2.7 Residual current monitoring in window discriminator mode ...... 17
3.2.8 Password protection (on, OFF) ................................................................. 17
3.2.9 Factory setting FAC ...................................................................................... 17

Table of Contents
4RCMA420-DM_D00060_02_M_XXEN/06.2016
3.2.10 Erasable history memory ............................................................................ 18
3.2.11 External, combined test/reset button T/R ............................................ 18
3.2.12 Fault memory .................................................................................................. 18
3.2.13 Interface option ............................................................................................. 18
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 ................................................................................ 24
5.5.1 Parameter query and setting: overview ................................................ 24
5.5.2 Changeover from overcurrent to undercurrent mode or to window
mode .................................................................................................................. 26
5.5.3 Response value setting for overcurrent: ............................................... 27
5.5.4 Setting the fault memory to con mode ................................................. 28
5.5.5 Selecting the output current range of the analogue interface ... 28
5.5.6 Select output voltage range of the analogue interface .................. 28
5.5.7 Setting the 100% reference related to the analogue interface. ... 29
5.5.8 Setting the time delays ............................................................................... 30
5.5.9 Changing from overcurrent operation to window operation ...... 30
5.5.10 Factory setting and password protection ............................................ 31
5.5.11 Restoring factory settings .......................................................................... 32
5.5.12 Device information query (Example) ..................................................... 32
5.5.13 History memory query ................................................................................. 33

Table of Contents
5RCMA420-DM_D00060_02_M_XXEN/06.2016
5.6 Commissioning .............................................................................................. 33
5.7 Factory setting ................................................................................................ 33
5.8 Error codes ....................................................................................................... 34
6. Technical data ................................................................................................ 35
6.1 Data in tabular form ..................................................................................... 35
6.2 Standards, approvals and certifications ................................................ 38
6.3 Ordering information ................................................................................... 39
6.4 Current and voltage curves of the analogue interface .................... 40
INDEX .................................................................................................................... 41

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RCMA420-DM_D00060_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 man-
ual, 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
8RCMA420-DM_D00060_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
Telephone: [phone]** (technical issues)
[phone]**, -785** (sales)
Fax: [phone]
E-mail: [email protected]
Please send the devices for repair to the following address:

Important information
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RCMA420-DM_D00060_02_M_XXEN/06.2016
Bender GmbH, Repair-Service,
Londorfer Str. 65,
35305 Gruenberg
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: [e-mail]
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
10 RCMA420-DM_D00060_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 de-
liveries, modifications and changes to general delivery conditions for prod-
ucts and services in the electrical industry) set out by the ZVEI (Zentralverband
Elektrotechnik- und Elektronikindustrie e. V.) (German Electrical and Electron-
ic Manufacturer's Association) also applies.
Sale and delivery conditions can be obtained from Bender in printed or elec-
tronic 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 tem-
peratures can be ensured.

Important information
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RCMA420-DM_D00060_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 follow-
ing 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
12 RCMA420-DM_D00060_02_M_XXEN/06.2016
1.7 Disposal
Abide by the national regulations and laws governing the disposal of this de-
vice. Ask your supplier if you are not sure how to dispose of the old equip-
ment.
The directive on waste electrical and electronic equipment (WEEE directive)
and the directive on the restriction of certain hazardous substances in electri-
cal and electronic equipment (RoHS directive) apply in the European Commu-
nity. 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-DM_D00060_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 stand-
ard 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
14 RCMA420-DM_D00060_02_M_XXEN/06.2016
2.3 Intended use
The AC/DC sensitive residual current monitor RCMA420-DM 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, construc-
tion 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 pa-
rameter 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-DM_D00060_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
 Start-up delay
 Measured value display via multi-functional LC display
 Alarm indication via LEDs (AL1, AL2) and analogue interface
 Password protection against unauthorized parameter changing
 Fault memory function can be switched off
 CT connection monitoring
 Manual device and CT self test using true test current
3.2 Function
Once the supply voltage Usis applied, the start-up delay is activated. Residual
current measurement takes place via an external measuring current transfor-
mer of the W20AB…W60AB(P) series. The currently measured value is shown
on the LC display. In this way any changes, for example when circuits are con-
nected to the system, can be recognized easily.
If the measured value exceeds one or both response values, the alarm LEDs
AL1 / AL2 light up. If the residual current falls below the release value (respon-
se value minus hysteresis), the alarm LEDs AL1/AL2 go out. If the fault memory
is activated, the LEDs light until the reset button R is pressed or until the sup-
ply voltage is interrupted.
The device function can be tested using the test button T.
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.

Function
16 RCMA420-DM_D00060_02_M_XXEN/06.2016
3.2.1 Connection monitoring
The CT connections are continuously monitored. In the event of a fault, the
alarm LEDs AL1 / AL2 / ON flash (Error Code E.01).
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). Switcho-
ver to the Menu mode is not required. If you want to exit the fast response va-
lue 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 functio-
nal faults will be detected and appear in form of an error code on the display.
3.2.4 Manual self test
While the test button T is pressed and held down, all device-related display
elements appear on the display.
After pressing the test button for > 1.5 s, the device carries out a self test. Du-
ring this test, internal functional faults are detected and will be displayed in
form of an error code.
In addition, a test current is supplied via the CT connection T which exceeds
the response value set at the RCMA. When the self test runs correctly, all of the
three LEDs light continuously. After successful testing, the yellow LEDs go out.
If the test current does not exceed the set response values, the yellow LEDs
flash and the fault message E.02 appears on the display.
3.2.5 Functional faults
If an internal functional fault occurs, all of the three LEDs flash. An error code
will appear on the display (E01…E32). In such a case please contact the Ben-
der Service.

Function
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RCMA420-DM_D00060_02_M_XXEN/06.2016
3.2.6 Start-up delay t
After connection to the supply voltage US, the alarm indication is delayed by
the preset time t(0…10 s).
3.2.7 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 30.
3.2.8 Password protection (on, OFF)
When the password protection is activated (on), settings are only possible af-
ter entering the correct password (0…999).
3.2.9 Factory setting FAC
After activating the factory setting, all settings previously changed are reset to
delivery status.

Function
18 RCMA420-DM_D00060_02_M_XXEN/06.2016
3.2.10 Erasable history memory
The first alarm value that occurs will be saved in this memory. The memory can
be cleared via the menu HiS.
3.2.11 External, combined test/reset button T/R
Reset = Pressing the external button < 1.5 s
Test = Pressing the external button > 1.5 s
3.2.12 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 me-
ans of the reset button R.
3.2.13 Interface option
The device provides an analogue interface with galvanic isolation. One of
three output signals can be selected from the associated menu.To receive no
error (full scale of the connected measuring device), only use the output you
have selected via the software:
– DC 0…400 μA
Current output for Bender measuring instruments of the 96.. series.
– DC 0…20 mA / DC 4…20 mA
Standardized current output with selectable current ranges.
– DC 0…10 V
Standardized voltage signal.

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RCMA420-DM_D00060_02_M_XXEN/06.2016
4. Installation and connection
Dimension diagram, drawing for screw mounting, push-wire
terminal connection
The front plate cover is easy to open at the lower part marked by an arrow.
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
90 mm
45
67,5
36 mm
31,1
47,5
70,5
1
2
3
100 mm
116 mm
Zubehör/
Accessory

Installation and connection
20 RCMA420-DM_D00060_02_M_XXEN/06.2016
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.
Key to wiring diagram
Terminal Connections
A1, A2 Connection to supply voltage Us
k, l Connection of measuring current transformers
T/R Connection to the combined test/reset button
M+ (common) positive pole of the analogue interface
μA Current output 0…400 μA
mA Current output 0/4…20 mA
VVoltage output 0…10 V