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Bender RCM420 Manual

Residual current monitor
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Manual
RCM420
Residual current monitor
for AC current monitoring in TN and TT systems
Software version: D240 V1.2x
RCM420_D00057_03_M_ XXEN/03.2021
Manual EN

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Summary of Contents for Bender RCM420

  • Page 1 Manual RCM420 Residual current monitor for AC current monitoring in TN and TT systems Software version: D240 V1.2x RCM420_D00057_03_M_ XXEN/03.2021 Manual EN...
  • Page 2 Bender GmbH & Co. KG PO Box 1161 • 35301 Gruenberg • Germany Londorfer Strasse 65 • 35305 Gruenberg • Germany Tel.: +49 6401 807-0 • Fax: +49 6401 807-259 E-Mail: info@bender.de • www.bender.de © Bender GmbH & Co. KG All rights reserved.

  • Page 3: Table Of Contents

    Table of Contents 1. Important information ..................7 How to use this manual ................. 7 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 Training courses ....................9 Delivery conditions ..................
  • Page 4 Table of Contents 3.2.10 Password protection (on, OFF) ..............17 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 3.2.15 Additional cascaded measuring current transformer ...... 18 4.
  • Page 5 Table of Contents Ordering information ................... 44 Document revision history ................. 46 INDEX ........................47 RCM420_D00057_03_M_ XXEN/03.2021...

  • Page 7: Important Information

    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.

  • Page 8: Technical Support: Service And Support

    Important information 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 ...

  • Page 9: Field Service

    **Mo-Thu 7.00 a.m. - 8.00 p.m., Fr 7.00 a.m. - 13.00 p.m 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 >...

  • Page 10: 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.

  • Page 11: Disposal

    13th August 2005 must be taken back by the manufacturer and disposed of pro- perly. For more information on the disposal of Bender devices, refer to our home- page at www.bender.de > Service & support. RCM420_D00057_03_M_ XXEN/03.2021...

  • Page 12: Safety Instructions

    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 Only qualified personnel are permitted to carry out the work necessary to install, commission and run a device or system.

  • Page 13: Intended Use

    Safety instructions 2.3 Intended use The AC and pulsed DC sensitive residual current monitor RCM420 (Type A) from Bender is designed for fault and residual current monitoring in earthed power supply systems (TN/TT systems) where an alarm is to be activated in the event of a fault, but disconnection must be prevented.

  • Page 14: Function

    Function 3. Function 3.1 Device features AC and pulsed DC sensitive residual current monitor Type A according   to DIN EN 62020 Adjustable switching hysteresis   r.m.s. value measurement   Starting delay, response delay and delay on release ...

  • Page 15: Connection Monitoring

    Function The device function can be tested using the TEST button. The parameterizati- on of the device can be carried out via the LC display and the function keys in- tegrated in the front plate and can be password-protected. 3.2.1 Connection monitoring The CT connections are continuously monitored.

  • Page 16: Functional Faults

    3.2.5 Functional faults If an internal functional fault occurs, all three LEDs flash. An error code will ap- pear on the display (E01…E32). In such a case please contact the Bender Ser- vice. 3.2.6 Set the number of reload cycles...

  • Page 17: Residual Current Monitoring In Window Discriminator Mode

    Function 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.

  • Page 18: Additional Cascaded Measuring Current Transformer

    Function 3.2.15 Additional cascaded measuring current transformer For applications where residual currents higher than 10 A occur, a second ex- ternal transformer can be cascaded. The transformer's transmission ratio can be adapted using the correction factor n in the SEt menu. RCM420_D00057_03_M_ XXEN/03.2021...

  • Page 19: Installation And Connection

    Installation and connection 4. Installation and 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 ...
  • Page 20 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 bey- ond the enclosure.
  • Page 21 = 100 (500 A / 5 A). That means, when the lowest value of 10 mA is set at the RCM420, a current of 1 A can only just be detected on the primary side of the transformer on the load side. In order to reduce the value that can be detected to 100 mA, 10 turns of the supply cable has to be routed through the transformer on the RCM side.

  • Page 22: Operation And Setting

    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. Display elements Ele- Function in use ment Reload function with memory = off (L = I.) Transformation ratio factor for a second external measuring current transformer Response value I...

  • Page 23: 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 con- nection monitoring fault AL1, LED Alarm 1 lights (yellow): Response value 1 reached Δ AL1 AL2 LED Alarm 2 lights (yellow): Res- ponse value 2 reached Δ...

  • Page 24: Menu Structure

    Operation and setting 5.3 Menu structure All adjustable parameters are listed in the columns "menu item" and "adjus- table parameters". A display-like representation is used to illustrate the para- meters in the column menu item. Different alarm categories can be assigned to the alarm relays K1, K2 via the submenus r1, r2.

  • Page 25: Display In Standard Mode

    Operation and setting Menu Activa- Menu Adjustable parameter Menu item tion t on 1 Response delay K1 t on 2 Response delay K2 (timing Starting delay check) t off Delay on release K1/K2 Selectable parameters: I 12 High, window function, low Transformation ratio factor for a second external measuring cur- rent transformer...

  • Page 26: Display In Menu Mode

    Operation and setting 5.5 Display in menu mode Parameter query and setting: overview Menu item Adjustable parameter 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 27 Operation and setting Menu item Adjustable parameter Query the first stored alarm value Move to the next higher menu level (back) Menu structure t > 1,5 s t > 1,5 s t < 1,5 s t > 1,5 s t < 1,5 s RCM420_D00057_03_M_ XXEN/03.2021...

  • Page 28: Parameter Settings

    Operation and setting 5.6 Parameter settings An example is given here on how to change the alarm response value I1 (I Δn1 It is presumed that the option overcurrent (HI) has been selected in the SEt/I 12 menu (factory setting). Proceed as follows: 1.
  • Page 29 Operation and setting Increasing the response value I2 (alarm overcurrent) > > > > Increasing the response value I1 (prewarning overcurrent). > > > > > Setting the hysteresis of the response value > RCM420_D00057_03_M_ XXEN/03.2021...

  • Page 30: Setting The Fault Memory And Alarm Relay Operating Mode

    Operation and setting 5.6.2 Setting the fault memory and alarm relay operating mode Setting the fault memory to con mode Setting the alarm relay K1 to N/O operation (n.o.) Setting the number of reload cycles > 1,5 s RCM420_D00057_03_M_ XXEN/03.2021...

  • Page 31: Assigning Alarm Categories To The Alarm Relays

    Operation and setting 5.6.3 Assigning alarm categories to the alarm relays Overcurrent, undercurrent and device-related errors of the residual current 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 32 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 CAUTION respective alarm LED (AL1/AL2)!

  • Page 33: Set The Time Delays

    Operation and setting 5.6.4 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 ...

  • Page 34: Changeover: Overcurrent/Undercurrent/Window Mode

    Operation and setting 5.6.5 Changeover: overcurrent/undercurrent/window mode The operating mode can be changed in the SEt/I 12 menu using the parame- ters HI, Lo and In. By default, overcurrent operation (HI) is set. . >1,5 s 5.6.6 Setting the correction factor for an additional cascaded current transformer >1,5 s Factory setting without cascaded transformer: n = 1.

  • Page 35: Factory Setting And Password Protection

    Operation and setting 5.6.7 Factory setting and password protection Use this menu to activate the password protection, to change the password or to deactivate the password protection. In addition, you can reset the device to its factory settings. a) Activating the password protection >1,5 s b) Changing the password >1,5 s...

  • Page 36: Device Information Query (Example)

    Operation and setting c) Deactivating the password protection >1,5 s Restoring factory settings ..5.6.8 Device information query (Example) This function is used to query the software (1.xx) version. After activating this function, data will be displayed as a scrolling text. Once one pass is completed you can select individual data sections using the Up/Down keys.

  • Page 37: History Memory Query

    Operation and setting 5.6.9 History memory query The history memory can be selected via the menu HiS. Use the Up and Down keys to view the next display. If Clr and M is flashing, the history memory can be cleared by pressing the Enter key. <...

  • Page 38: Data

    Data 6. Data Factory setting 15 mA (50 % of I2) Response value overcurrent 30 mA (prewarning) 15 % Response value overcurrent I2 (alarm) activated (on) Hysteresis operation Fault memory M (n.c.) Operating mode K1/K2 t = 0.5 s Starting delay = 1 s Response delay = 0 s...

  • Page 39: Error Codes

    Appropriate action when error codes > 02 occur: Carry out a reset. Reset the device to factory setting. After elimina- ting the fault, the error code will be automatically deleted. If the fault continues to exist, please contact the Bender Service. RCM420_D00057_03_M_ XXEN/03.2021...

  • Page 40: Technical Data

    Data 6.3 Technical data ( )* = factory setting Insulation coordination acc. to IEC 60664-1/IEC 60664-3 RCM420-D-1 Rated insulation voltage .........................100 V Overvoltage category/pollution degree.....................III/3 Rated impulse voltage ........................2,5 kV RCM420-D-2 Rated insulation voltage ........................ 250 V Overvoltage category/pollution degree.....................III/3 Rated impulse voltage ........................
  • Page 41 ......................... 0…10 m Shielded cable ≥ 0.75 mm .......................... 0…40 m Recommended cable (shielded, shield on one side connected to terminal l of the RCM420, not connected to earth) ......................................J-Y(St)Y min. 2 x 0.8 Connection..............................screw terminals Displays, memory Display range, measured value ........................ 3 mA…16 A Error of indication ..........................
  • Page 42 Data Switching elements Number of switching elements ..................... 2 x 1 changeover contact Operating principle ................N/C operation/ N/O operation (N/O operation)* Electrical service life under rated operating conditions........... 10000 switching operations Contact data acc. to IEC 60947-5-1 Utilization category AC-13 AC-14 DC-12 DC-12...
  • Page 43 Data Connection For UL application....................use 60/70 °C copper conductors only Connection type......................screw-type terminals Connection properties: rigid/ flexible/ conductor sizes ..............0.2…4 / 0.2…2.5 mm / AWG 24…12 Multi-conductor connection (2 conductors with the same cross section) rigid, flexible ........................0.2…1.5 / 0.2…1.5 mm Stripping length ............................

  • Page 44: Standards, Approvals And Certifications

    Data 6.4 Standards, approvals and certifications 6.5 Ordering information RCM420-D-1 RCM420-D-2 Response range 10 mA…10 A Δn 42…2000 Hz Rated frequency Measuring current CTAC…, WR…, WS… series transformers DC 70…300 V / DC 9.6 V…94 V / AC 42…460 Hz, Supply voltage s* AC 42…460 Hz, 16…72 V...
  • Page 45 D00076 115 x 305 WR115x305 B98080610 20 x 30 WS20x30 B98080601 split-core D00077 50 x 80 WS50x80 B98080603 80 x 120 WS80x120 B98080606 RCM420 accessories Mounting clip for screw fixing (1 piece per device) ................. B 9806 0008 RCM420_D00057_03_M_ XXEN/03.2021...
  • Page 46 Data 6.6 Document revision history Document Date State/Changes version 03.2020 Editorial revision Terms prewarning + main alarm Chapter 4. : Wiring diagram, Chapter 6.3: Min. contact load Chapter 6.5: Order information CTAC… Added Chapter 6.2: UKCA logo RCM420_D00057_03_M_ XXEN/03.2021...
  • Page 47 INDEX How to use this manual 7 Adjustable parameters, list 24 Installation 19 Automatic self test 15 Installation and connection 19 Intended use 13 Connection of an additional cascaded measuring current transformer 21 K1/K2: assignment alarm category 24 LED Alarm 1 lights 23 Delay on release toff 16 LED Alarm 2 lights 23 Deleting the fault alarms 23...
  • Page 48 Operation and setting 22 Starting delay t 16 Ordering information 44 Starting the menu mode 23 Support 8 Parameter query and setting, overview 26 Parameter setting Technical data 40 - Activating or deactivating the pass- Test button 23 word protection 35 Training courses 9 - Assigning alarm categories to the alarm relays 31...
  • Page 52 Bender GmbH & Co. KG PO Box 1161 • 35301 Gruenberg • Germany Londorfer Strasse 65 • 35305 Gruenberg • Germany Tel.: +49 6401 807-0 • Fax: +49 6401 807-259 E-Mail: info@bender.de • www.bender.de Group Photos: Bender archives...

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