Bender RCMA420 Operating Manual
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Bender RCMA420 Operating Manual

Residual current monitor for monitoring ac, dc and pulsed dc currents in tn and tt systems
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Operating Manual
RCMA420
Residual current monitor
for monitoring AC, DC and pulsed DC currents
in TN and TT systems
Software version D242 V1.1x
Power in electrical safety
TGH1411en/08.2009

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Summary of Contents for Bender RCMA420

  • Page 1 Operating Manual RCMA420 Residual current monitor for monitoring AC, DC and pulsed DC currents in TN and TT systems Software version D242 V1.1x Power in electrical safety TGH1411en/08.2009...
  • Page 2 Dipl.-Ing. W. Bender GmbH & Co. KG Londorfer Str. 65 • 35305 Grünberg • Germany Postfach 1161 • 35301 Grünberg • Germany Tel.: +49 6401-807-0 Fax: +49 6401-807-259 E-Mail: info@bender-de.com Web: http://www.bender-de.com © Dipl.-Ing. W. Bender GmbH & Co. KG All rights reserved.

  • Page 3: Table Of Contents

    Table of Contents 1. Effective use of this manual ................5 Notes for the user ..................... 5 Intended use ...................... 5 Information about factory setting ............. 6 2. Safety information ................... 7 Safety information ................... 7 Work activities on electrical installations ..........7 3.
  • Page 4 Table of Contents 4. Installation and connection ................. 13 5. Operation and setting .................. 15 Display elements in use ................15 Function of the operating elements ............16 Menu structure ....................17 Display in standard mode ................18 Display in menu mode ................19 5.5.1 Parameter query and setting: overview ..........

  • Page 5: Effective Use Of This Manual

    Info symbol. 1.2 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 cur- rents may occur. These are in particular loads containing six-pulse rec- tifiers or one way rectifiers with smoothing, such as converters, battery chargers, construction site equipment with frequency-controlled drives.

  • Page 6: Information About Factory Setting

    Effective use of this manual 1.3 Information about factory setting Page 30 provides a summary of all factory settings. If you want to reset the residual current monitor to factory settings, refer to page 29. TGH1411en/08.2009...

  • Page 7: Safety Information

    2. Safety information 2.1 Safety information In addition to this data sheet, the documentation of the device includes a sheet entitled "Important safety instructions for BENDER products“. 2.2 Work activities on electrical installations All work activities necessary for installation, commissioning or work activities during operation of electrical devices or systems are to be car- ried out by adequately skilled personnel.
  • Page 8 Safety information TGH1411en/08.2009...

  • Page 9: Function

    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...

  • Page 10: Connection Monitoring

    Function 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.

  • Page 11: Functional Faults

    If an internal functional fault occurs, all three LEDs flash. An error code will appear on the display (E01...E32). For example, E08 means: Incorrect internal calibration. In such a case please contact the Bender Service. 3.2.6 Set the number of reload cycles...

  • Page 12: Delay On Release T Off

    Function value to a value below the response value, an alarm will not be sig- nalled. 3.2.11 Delay on release t 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 contin- uously maintained for the selected period.

  • Page 13: Installation And Connection

    4. Installation and connection Ensure safe isolation from supply in the installation area. Ob- serve the installation rules for live working. General dimension diagram and drawing for screw fixing Zubehör/ Accessory 36 mm The front plate cover is easy to open at the lower part marked by an arrow.
  • Page 14 Installation and connection 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 beyond the enclosure.

  • Page 15: Operation And Setting

    5. Operation and setting 5.1 Display elements in use A detailed description of the meaning of the display elements in use is given in the table below. Elemen Display elements in use Function Reload function with memory = off (L = I.) Response value I as mA Δn2...

  • Page 16: Function Of The Operating Elements

    Operation and setting 5.2 Function of the operating elements Device front Element Function LED lighting continuously: Power green Flashing LED: System fault or connection moni- toring fault AL1, LED Alarm 1 lights (yellow): Response value 1 reached Δn1 LED Alarm 2 lights (yellow): Response value 2 reached Δn2 13 mA...

  • Page 17: Menu Structure

    Operation and setting 5.3 Menu structure All adjustable parameters are listed in the columns "menu item" and "ad- justable parameters". A display-like representation is used to illustrate the parameters in the column menu item. Different alarm categories can be assigned to the alarm relays K1, K2 via the submenus r1, r2. This is done by activation or deactivation of the respective function.

  • Page 18: Display In Standard Mode

    Operation and setting Menu Activati Menu Adjustable parameter Menu item t on 1 Response delay K1 t on 2 Response delay K2 (timing check) Starting delay t off Delay on release K1/K2 Selectable parameters: I 12 High, window function, low Parameter setting via pass- (device con- word...

  • Page 19: Display In Menu Mode

    Operation and setting 5.5 Display in menu mode 5.5.1 Parameter query and setting: overview Menu Adjustable parameter item Response values query and setting: – Residual current I2 (I ) (AL2) Δn2 – Residual current I1 (I ) (AL1) Δn1 – Hysteresis of the response values: % Hys Configuration of the fault memory and the alarm relays: –...
  • Page 20 Operation and setting Menu structure t >1,5 s t > 1,5 s t < 1,5 s t < 1,5 s t > 1,5 s TGH1411en/08.2009...

  • Page 21: Changeover From Overcurrent To Undercurrent Mode Or To Window

    Operation and setting Parameter settings An example is given here on how to change the alarm response value I1 (I ). It is presumed that the option overcurrent (HI) has been select- Δn1 ed in the SEt/I 12 menu (factory setting). Proceed as follows: 1.

  • Page 22: Response Value Setting For Overcurrent

    Operation and setting 5.5.3 Response value setting for overcurrent: - Response value I2 (overcurrent I Δn2 - Response value I1 (overcurrent I Δn1 - Hysteresis (Hys) of the response values I Δn1 Δn2 Increasing the response value I2 (alarm overcurrent) Increasing the response value I1 (prewarning overcurrent).

  • Page 23: Setting The Fault Memory And Alarm Relay Operating Mode

    Operation and setting 5.5.4 Setting the fault memory and alarm relay operating mode Deactivating the fault memory Setting the alarm relay K1 to N/O operation (n.o.) Setting the number of reload cycles >1,5 s TGH1411en/08.2009...

  • Page 24: Assigning Alarm Categories To The Alarm Relays

    Operation and setting 5.5.5 Assigning alarm categories to the alarm relays Overcurrent, undercurrent and device-related errors of the residual cur- rent monitor can be assigned to the alarm relays K1 (r1, 1) and K2 (r2, 2). By default, the alarm relays K1 and K2 signal prewarning and alarm in case of overcurrent and device-related errors.
  • Page 25 Operation and setting Alarm relay K1: Activating the category response value I2 >1,5 s Alarm relay K1: Deactivating the category "Alarm by device test" >1,5 s When an alarm relay (K1/K2) has been deactivated in the menu, an alarm will not be signalled by the respective changeover contact! An alarm will only be indicated by the respective alarm LED (AL1/AL2)! TGH1411en/08.2009...

  • Page 26: Set The Time Delays

    Operation and setting 5.5.6 Set the time delays The following delays can be set: Response delay t (0...10 s) for K1, and t (0...10 s) for K2 Starting delay t (0...10 s) when the device is being started Common delay on release t (0...99 s) for K1, K2.

  • Page 27: Changing From Overcurrent Operation To Window Operation

    Operation and setting 5.5.7 Changing from overcurrent operation to window operation Use this menu item to set whether the response values of the device ap- ply to overcurrent (HI) or undercurrent operation (Lo). In addition, win- dow operation (In) can be selected. >1,5 s 5.5.8 Factory setting and password protection...
  • Page 28 Operation and setting b) Changing the password >1,5 s c) Deactivating the password protection >1,5 s TGH1411en/08.2009...

  • Page 29: Restoring Factory Settings

    Operation and setting 5.5.9 Restoring factory settings ..5.5.10 Device information query This function is used to query the hardware (d...) and software (1.xx) versions. After activating this function, data will be displayed as a scroll- ing text. Once one pass is completed you can select individual data sec- tions using the Up/Down keys.

  • Page 30: Commissioning

    Operation and setting 5.6 Commissioning Prior to commissioning, check proper connection of the residual current monitor. 5.7 Factory setting Response value overcurrent I1 (prewarning) 15 mA (50 % of I2) Response value overcurrent I2 (alarm) 30 mA Hysteresis: 15 % Fault memory M: activated (on) Operating mode K1/K2...

  • Page 31: Technical Data

    ......................(A1, A2) - (k/l, T/R) - (11, 12, 14) - (21, 22, 24) Voltage test according to IEC 61010-1 ....................... 2.21 kV Supply voltage RCMA420-D-1: Supply voltage U ....................... AC 16...72 V / DC 9.6...94 V Frequency range U ............................
  • Page 32 Technical data Hysteresis ............................10...25 % (15%)* Specified time Starting delay t ............................0...10 s (0.5 s)* Response delay t (alarm) ........................0...10 s (0 s)* Response delay t (prewarning) ......................0...10 s (1 s)* Delay on release t ..........................0...99 s (1 s)* ......................
  • Page 33 Technical data Environment/EMC EMC ................................. IEC 62020 Operating temperature ......................... -25 ºC...+55 ºC Classification of climatic conditions IEC 60721 Stationary use (IEC 60721-3-3) ............3K5 (except condensation and formation of ice) Transportation (IEC 60721-3-2) ............2K3 (except condensation and formation of ice) Storage (IEC 60721-3-1) ..............1K4 (except condensation and formation of ice) Classification of mechanical conditions acc.

  • Page 34: Ordering Information

    WX-500 B 9808 0505 WX-1000 B 9808 0506 Accessories RCMA420 Mounting clip for screw fixing (1 piece per device) .................. B 9806 0008 Measuring current transformers accessories Snap-on mounting for DIN rail: W20AB /W35AB ................... B 9808 0501 Snap-on mounting for DIN rail: W60AB ....................B 9808 0502...

  • Page 35: Timing Diagram: Overcurrent Monitoring

    Technical data 6.3 Timing diagram: Overcurrent monitoring Start Overcurrent t off Dt < t an t an t an Current > I < I Supply voltage Alarm LEDs „ON“ „AL1“ „AL2“ Alarm relay 11 - 12 MEM off 21 - 22 11 - 12 Alarm relay MEM off...

  • Page 36: Error Codes

    Appropriate action when error codes > 02 occur: Appropriate action: Carry out a reset. Reset the device to factory E..setting. After eliminating the fault, the error code will be automatically deleted. If the fault continues to exist, please contact the BENDER Service. TGH1411en/08.2009...
  • Page 37 INDEX Adjustable parameters, list 17 K1/K2: assignment alarm category Automatic self test 10 Connection of an additional cas- LED Alarm 1 lights 16 caded measuring current LED Alarm 2 lights 16 transformer 15 Manual self test 10 Delay on release toff 12 Manual, target group 5 Deleting the fault alarms 16 Menu...
  • Page 38 Ordering information 34 - Overcurrent (> I) 22 Setting the number of reload cycles Parameter query and setting, over- Starting delay t 11 view 19 Starting the menu mode 16 Parameter setting - Activating or deactivating the password protection 27 Technical data 31 - Activating the fault memory Test button 16...
  • Page 40 Dipl.-Ing. W. Bender GmbH & Co. KG Londorfer Str. 65 • 35305 Grünberg • Germany Postfach 1161 • 35301 Grünberg • Germany Tel.: +49 6401-807-0 Fax: +49 6401-807-259 E-Mail: info@bender-de.com Web: http://www.bender-de.com...

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