Bender WN-35BS User Manual
Manual
RCMA421H
WN-35BS
Residual current monitor
for monitoring AC, DC and pulsed DC currents
in earthed and resistance earthed systems
Software version D309 V1.0x
RCMA421H_D00069_00_M_XXEN/05.2014
Bender GmbH & Co. KG
P.O. Box 1161 • 35301 Gruenberg • Germany
Londorfer Str. 65 • 35305 Gruenberg • Germany
Tel.: +49 6401 807-0
Fax: +49 6401 807-259
E-Mail: info@bender.de
Web: http://www.bender.de
© Bender GmbH & Co. KG
All rights reserved.
Reprinting only with permission
of the publisher.
Subject to change!
Table of Contents
1. Making effective use of this document ....................................................... 5
1.1 How to use this manual ................................................................................. 5
1.2 Intended use ...................................................................................................... 5
2. Safety instructions ........................................................................................... 7
2.1 General safety instructions ........................................................................... 7
2.2 Work activities on electrical installations ................................................ 7
2.3 Device-specific safety information ............................................................ 8
3. Function ............................................................................................................. 9
3.1 Device features ................................................................................................. 9
3.2 Description of function .................................................................................. 9
3.2.1 Transformer monitoring ............................................................................. 10
3.2.2 Quick query of the rated residual operating current ....................... 10
3.2.3 Self test, automatic ....................................................................................... 11
3.2.4 Self test, manual ............................................................................................ 11
3.2.5 Malfunction ..................................................................................................... 11
3.2.6 Password protection (on, OFF) ................................................................. 11
3.2.7 Factory setting FAC ...................................................................................... 12
3.2.8 Erasable history memory HiS .................................................................... 12
4. Installation and connection ......................................................................... 13
4.1 Dimension diagrams .................................................................................... 13
4.2 Factory setting ............................................................................................... 16
4.3 Commissioning .............................................................................................. 16
5. Operation and configuration ....................................................................... 17
5.1 Getting to know the user interface ......................................................... 17
5.2 Understanding information on the standard display ...................... 18
5.3 Getting to know buttons and button functions ................................ 19
RCMA421H_D00069_00_M_XXEN/05.2014
3
Table of Contents
5.4 Starting a manual self test .......................................................................... 20
5.5 Erasing the fault memory ........................................................................... 20
5.6 Calling up and exiting the menu ............................................................. 20
5.7 Making settings in the menu .................................................................... 21
5.7.1 Selecting menus ............................................................................................ 21
5.7.2 Querying the software version with the InF menu ........................... 22
5.7.3 Making settings in the SEt menu ............................................................. 23
5.7.4 Querying and erasing the fault memory in the HIS menu ............. 25
6. Technical data ................................................................................................ 27
6.1 Data RCMA421H-D-2 in table form ......................................................... 27
6.2 Error codes ....................................................................................................... 30
6.3 Recommended contactors ........................................................................ 31
6.4 Response times of the RCMA421H system plus
contactor in accordance with UL943 ..................................................... 32
6.5 Ordering information ................................................................................... 33
6.6 Standards, approvals and certifications ................................................ 33
6.7 Label for modified versions ....................................................................... 34
INDEX .................................................................................................................... 35
4
RCMA421H_D00069_00_M_XXEN/05.2014
1. Making effective use of this document
1.1 How to use this manual
This manual has been designed for electrically skilled persons
working in electrical engineering and electronics!
To make it easier for you to understand and revisit certain sections of text and
instructions in the manual, we have used symbols to identify important instructions and information. Examples of how such symbols are used appear
below:
The warning symbol indicates a potential dangerous
situation that may result in bodily injury and/or damage
to property.
Observe the associated safety instructions.
Information intended to assist the user to make optimum
use of the product are marked with the Info symbol.
1.2 Intended use
The AC/DC sensitive residual current monitor RCMA421H with its measuring
current transformer WN-35BS is used to monitor earthed and resistiveearthed systems (TN and TT systems) in which DC and AC fault currents may
occur. These systems involve loads with six-pulse bridge rectifiers or halfwave rectifiers with smoothing, e.g. converters and chargers.
In the event of a rated residual current I
alarm relay and the associated contactor in accordance with the operating
time specified in UL943.
of 6 mA, the device will switch an
Δ
n
RCMA421H_D00069_00_M_XXEN/05.2014
5
Making effective use of this document
6
RCMA421H_D00069_00_M_XXEN/05.2014
2. Safety instructions
2.1 General safety instructions
In addition to these operating instructions, the "Important safety instructions
for Bender products“, which are also included in the scope of supply, are an integral part of the device documentation.
2.2 Work activities on electrical installations
Only skilled persons are permitted to carry out the work necessary to
install, commission and run a device or system.
Compliance with applicable regulations governing work on electrical
installations, and with the regulations derived from and associated
with them, is mandatory. EN 50110 is of particular importance in this
regard.
Failure to carry out work on electrical installations properly and correctly can put life and limb at risk!
If the device is being used in a location outside the Federal Republic of
Germany, the applicable local standards and regulations must be complied with. European standard EN 50110 can be used as a guide.
RCMA421H_D00069_00_M_XXEN/05.2014
7
2.3 Device-specific safety information
According to UL943 every residual current monitor and
the associated measuring current transformer is to be
tested in pairs. The relevant serial number for the transformer is imprinted on the enclosure of the RCMA421H.
The residual current monitor and the measuring current
transformer assigned to it may only be used or interchanged in pairs.
Safety instructions
8
RCMA421H_D00069_00_M_XXEN/05.2014
3. Function
3.1 Device features
AC/DC sensitive residual current monitor with external 35 mm measur-
ing current transformer
Can be used in conjunction with a contactor
Rated residual operating current I
Operating time acc. to UL943
r.m.s. value measurement, frequency range 0…150 Hz
Measured value display via multi-functional LCD
Alarm signalling via LEDs (TPD, ERR) and K2 changeover contact
Password protection to prevent unauthorised changes being made to
device settings
Permanent fault memory
N/C operation of alarm relay
Device test when the power supply voltage is connected
Automatic self test every 24 h
CT connection monitoring
Internal test circuit acc. to UL943 without additional external compo-
nents
External test and reset button can be connected
N-PE conductor monitoring on the load side
3.2 Description of function
The RCMA421H runs a device test when the power supply voltage is connected. During the start-up phase, the TRP LED lights up, the alarm LED ERR flashes
and the alarm relay switches to the alarm setting.
Once the device test has been completed successfully, the ERR alarm LED will
stop flashing, the TPD LED will go out and the alarm relay will return to the
normal setting.
= 6 mA acc. to UL943
Δn
RCMA421H_D00069_00_M_XXEN/05.2014
9
Function
The device will check the circuit for the presence of residual currents even during the self test.
An external measuring current transformer (e.g. WN-35BS) is used for residual
current measurement. The actual measured value is indicated on the LCD. If
the rated residual operating current of 6 mA is exceeded, the alarm relay K2
will change to the alarm state and the TRP alarm LED will light up.
Once the alarm relay has switched, the residual current must fall to less than
the rated residual operating current.
If it does not, error code E.04 will appear on the display and the ERR alarm LED
will flash. This means that the connected contactor has not shut down the
faulty circuit.
If the residual current falls below the release value, the error will continue to
be signalled due to the permanently activated fault memory. The alarm relay
K2 will not switch back to the initial state and the TRP alarm LED will not go
out until the reset button R is pressed or the power supply voltage is interrupted.
Parameters are assigned to the device via the LCD and the control buttons on
the front panel; this function can be password-protected.
3.2.1 Transformer monitoring
The connections to the measuring current transformer are checked periodically every 10 s for short and open circuits. In the event of an error, the alarm
relay K2 will switch, the red TPD alarm LED will light up and the yellow ERR
alarm LED will flash (error codes E.01 or E.03). Once the error has been eliminated, the alarm LEDs and the alarm relay will remain in the alarm state. Pressing the reset button R or sending a reset command via the RS-485 interface
will switch K2 back to its initial state and the alarm LEDs will go out.
3.2.2 Quick query of the rated residual operating current
When the display is in standard mode, the rated residual operating current IΔn
= 6 m A can be qu erie d by pres sing the U p or Down butt on (< 1.5 s). S witc hing
to menu mode is not necessary. Quick query mode can be exited by pressing
Enter (< 1.5 s).
10
RCMA421H_D00069_00_M_XXEN/05.2014
Function
3.2.3 Self test, automatic
The device runs a self test every 24 h. Any internal malfunctions detected are
shown on the display as error codes. The automatic self test is carried out
without internal fault current. The alarm relay is not switched during the 24-h
test.
3.2.4 Self test, manual
The device runs a self test when the test button is pressed (> 1.5 s). Any internal malfunctions detected are shown on the display as error codes.
Whilst the test button T is pressed, all display elements available for this device are shown. When the button is released, the tES test symbol appears and
the manual self test commences.
During the manual self test, an internal test current of approx. 7 mA is evaluated. Consequently, the TPD alarm LED lights up and the alarm relay switches.
Once the alarm relay has switched, the residual current must fall to less than
the rated residual operating current. If it does not, error code E.04 will appear
on the display to indicate that the connected contactor has not shut down the
load circuit.
If the self test has been successfully and the reset button R is pressed, the
alarm LEDs will go out and the relay will switch to its initial state.
If the self test has not been successfully, the TPD alarm LED will light, the ERR
alarm LED will flash, the alarm relay will switch to the alarm state and an error
code will be displayed.
3.2.5 Malfunction
In the event of an internal malfunction, the TPD alarm LED will light and the
ERR alarm LED will flash. An error code will appear on the display until the fault
is removed. Refer to page 30 for details about error codes.
3.2.6 Password protection (on, OFF)
If password protection has been activated (on), settings can only be made
subject to the correct password being entered (0…999).
RCMA421H_D00069_00_M_XXEN/05.2014
11
Function
3.2.7 Factory setting FAC
Activating the factory setting will reset all modified settings, with the exception of the device address, to the default upon delivery.
3.2.8 Erasable history memory HiS
The first alarm value to occur is written to this memory. The memory can be
erased via the HiS menu.
12
RCMA421H_D00069_00_M_XXEN/05.2014
Loading...