Bender CMD421 Manual
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Bender CMD421 Manual

Bender CMD421 Manual

Current monitoring device
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Manual
CMD420
CMD421
Current monitoring device
for monitoring of 3AC current with current transformer for
overcurrent or undercurrent
or in window mode for overcurrent and undercurrent
Software version CMD420: D287 V1.1x
Software version CMD421: D294 V1.1x
CMD420-421_D00101_M_XXEN/07.2016

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  • Page 1 Manual CMD420 CMD421 Current monitoring device for monitoring of 3AC current with current transformer for overcurrent or undercurrent or in window mode for overcurrent and undercurrent Software version CMD420: D287 V1.1x Software version CMD421: D294 V1.1x CMD420-421_D00101_M_XXEN/07.2016...
  • Page 2 Bender GmbH & Co. KG P.O. 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 ..................... 10 Delivery conditions ..................
  • Page 4 Table of Contents 3.2.9 Delay times t, ton and toff ................ 18 3.2.10 Password protection (on, OFF) ..............19 3.2.11 Factory setting FAC ..................19 3.2.12 Transformation ratio of the current transformers ......19 4. Installation, connection and commissioning ........... 21 Installing the device ..................
  • Page 5 Table of Contents 6. Technical data ....................45 Data in tabular form ..................45 Standards, approvals and certifications ..........49 Label for modified versions ............... 49 Ordering details ..................... 50 CMD420-421_D00101_M_XXEN/07.2016...

  • Page 7: Important Information

    1. Important information 1.1 How to use this manual This manual is intended for qualified personnel working in electrical engineering and electronics! 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.

  • Page 8: Technical Support: Service And Support

    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. 1.2 Technical support: service and support For commissioning and troubleshooting Bender offers you: 1.2.1...

  • Page 9: Field Service

    Important information 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,  ...

  • Page 10: Training Courses

    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.

  • Page 11: Warranty And Liability

    Important information 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. ...

  • Page 12: Disposal

    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.

  • Page 13: 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 14: Intended Use

    Safety instructions 2.3 Intended use The current monitoring device CMD420 resp. CMD421 monitors a three- phase system and also three different AC systems for undercurrent or over- current, and in window mode for undercurrent and overcurrent. For current measurement, three external standard current transformers are to be con- nected according to the wiring diagram.

  • Page 15: Function

      monitoring with window discriminator function Current monitoring using standard current transformers:   x/ 1A (CMD420), x/ 5A (CMD421) Two separately adjustable alarm relays with one changeover contact   each (K1, K2) Fault memory behaviour for the alarm relays selectable ...

  • Page 16: Window Discriminator Function

    Function The devices provide two separately adjustable response values (overcurrent/ undercurrent). When the measuring quantity exceeds the response value ("Alarm 2") or falls below the response value ("Alarm 1"), such as is the case with window discriminator function, the time of the response delays "t "...

  • Page 17: Automatic Self Test

    Function 3.2.2 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 func- tional faults will be detected and appear in form of an error code on the dis- play.

  • Page 18: Assigning Alarm Categories To Alarm Relays K1/K2

    (n.c.). In addition, the alarm category "Err" has to be assigned to the selected alarm relay in the menu out/r1 or r2. CAUTION If these conditions cannot be met, periodic inspection of the CMD420/CMD421 is required! 3.2.9 Delay times , The times t, t...

  • Page 19: Password Protection (On, Off)

    "Set". The CMD420 requires current transformers with a transformation ratio of n = x/1A. The CMD421 requires current transformers with a transformation ratio of n = x/5A. The actual primary current can be calculated by multiplying the measured current by factor n and indicated on the display.
  • Page 20 0.10…1.00 A 0.90…9.00 A 10…99 1.0…10.0 A 9.90…99.0 A 100…990 10…100 A 99.0…990 A 1.00…2.00 k 0.10…1.00 kA 0.20…2.00 kA Response value range CMD421 Factor min. max. 1…9 0.50…5.00 A 4.50…45.0 A 10…99 5.0…50.0 A 49.5…495 A 100…990 50…500 A 495 A…4.95 kA...

  • Page 21: Installation, Connection And Commissioning

    4. Installation, connection and commissioning 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 22: Installing The Device

    Installation, connection and commissioning 4.1 Installing the device Zubehör/ Accessory 36 mm Fig. 4.1: Dimension diagram and drawing for screw fixing Mounting on DIN rail: Snap the rear mounting clip of the device into place in such a way that a safe and tight fit is ensured.

  • Page 23: Connection Of The Device

    Installation, connection and commissioning 4.2 Connection of the device Connect the device according the wiring diagram. ~/– IT-System l1 k2 Connect the conductor to the push-wire ter- minals according to the schematic diagram. Terminal Connections Connection to supply volt- A1, A2 age U k1, l1 Connection to the conduc-...

  • Page 24: Commissioning

    Installation, connection and commissioning 4.3 Commissioning Checks must be carried out prior to commissioning to ensure that the current monitoring device has been connected correctly. Then perform a functional test. Incorrect connections can lead to personal injury and damage to equipment or property! CAUTION The maximum permissible measuring current and the overload capability of the measuring inputs k, l have to be...

  • Page 25: Factory Setting

    Transformation ratio n Password: 0, deactivated (Off) 4.5 Maintenance One alarm relay of the CMD420 CMD421 must work in N/C operation with the alarm category "Err" assigned to this relay, otherwise periodic inspection will be necessary! CAUTION A functional test is recommended to be carried out at regular intervals. It is preferable to check correct alarm indication by means of a current fault.
  • Page 26 Installation, connection and commissioning CMD420-421_D00101_M_XXEN/07.2016...

  • Page 27: Operation And Configuration

    5. Operation and configuration 5.1 Display elements in use Display elements in use Element Mode Values of the measurement inputs L1, L2, k1/l1, k2/l2, k3/l3 Reload function with memory = off (L = I.) Transformation ratio for external current transformer Undercurrent I1 or I2 <...

  • Page 28: Function Of The Operating Elements

    Operation and configuration 5.2 Function of the operating elements Device front Element Mode Power On LED, green LED Alarm 1 lit up (yellow): Response value 1 reached LED Alarm 2 lit up (yellow): Response value 2 reached Transformation ratio n > 1; AL1 AL2 I = 1.6 A = value across the measure- 1.6 A...

  • Page 29: Menu Structure

    Operation and configuration 5.3 Menu structure All adjustable parameters are listed in the columns "Menu" and "Adjustable parameters". A display-like representation is used to illustrate the parameters in the column Menus. Different alarm categories can be assigned to the alarm relays K1, K2 via the submenus r1, r2.
  • Page 30 Operation and configuration Menu Activati Menu Adjustable parameter Menu item Selectable parameters: Hi= overcurrent, (device con- I 12 In = window function, trol) Lo = undercurrent Transformation ratio exter- nal current transformer Set parameters via pass- word Factory setting visual inspection Function locked Display software version History memory for the first...

  • Page 31: Display In Standard Mode

    Operation and configuration 5.4 Display in standard mode By default, the currently measured current of measuring channel L1 is dis- played. By pressing the Down button the following values can be queried con- secutively: – Current of measuring channel L2 –...

  • Page 32: Display In Menu Mode

    Operation and configuration 5.5 Display in menu mode 5.5.1 Parameter query and setting: overview Menu Adjustable parameter item Response value query and setting: – Alarm I2 (AL2), (undercurrent, overcurrent or window function can be set in the SEt/I menu) – Prewarning I1 (AL1), (X % of I2) –...
  • Page 33 Operation and configuration Menu structure t >1,5 s t > 1,5 s t < 1,5 s t < 1,5 s t > 1,5 s CMD420-421_D00101_M_XXEN/07.2016...

  • Page 34: Changeover From Overcurrent To Undercurrent Mode Or To Window

    Operation and configuration Parameter settings An example is given below on how to change the alarm response value for overcurrent > I1. It is presumed that the option overcurrent (HI) has been se- lected in the SEt/I menu (factory setting). Proceed as follows: 1.

  • Page 35: Response Value Setting For Overcurrent

    Operation and configuration 5.5.3 Response value setting for overcurrent: - Response value I2 (overcurrent) - Response value I1 (overcurrent) - Hysteresis (Hys) of the response values I1, I2 Increasing the response value I2 (Example: overcurrent) Increasing the response value I1 (prewarning overcurrent) Setting the hysteresis of the response value CMD420-421_D00101_M_XXEN/07.2016...

  • Page 36: Setting The Fault Memory And Alarm Relay Operating Mode

    Operation and configuration 5.5.4 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 CMD420-421_D00101_M_XXEN/07.2016...

  • Page 37: Assigning Alarm Categories To The Alarm Relays

    Operation and configuration 5.5.5 Assigning alarm categories to the alarm relays Overcurrent, undercurrent and device-related errors of the 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. Alarm relay K1: Deactivating the category device error >1,5 s Alarm relay K1: Deactivating the category response value I1...
  • Page 38 Operation and configuration Alarm relay K1: Activating the category response value I2 >1,5 s Alarm relay K1: Deactivating the category device test >1,5 s Deactivating an alarm relay (K1/K2) via the menu prevents an alarm being indicated by the respective changeover contact! An alarm will be signalled by the respective alarm LED (AL1/AL2) only! CAUTION...

  • Page 39: Setting Time Delays

    Operation and configuration 5.5.6 Setting time delays The following delays can be set: Response delay t (0…300 s) for K1, and t (0…300 s) for K2   Start-up delay t (0…300 s) when the device is being started   Common delay on release t (0…300 s) for K1, K2.

  • Page 40: Changing From Overcurrent Operation To Window Operation

    Operation and configuration 5.5.7 Changing from overcurrent operation to window operation Use this menu item to set whether the response values of the device apply to overcurrent (HI) or undercurrent operation (Lo). In addition, window opera- tion (In) can be selected. >1,5 s 5.5.8 Setting the transformation ratio for external current...

  • Page 41: Factory Setting And Password Protection

    Operation and configuration 5.5.9 Factory setting and password protection This menu can be used to activate password protection, to modify the pass- word or to deactivate password protection. It is also where the device can be reset to the factory settings. a) Activating the password protection >1,5 s b) Changing the password...

  • Page 42: Restoring Factory Settings

    Operation and configuration c) Deactivating the password protection >1,5 s 5.5.10 Restoring factory settings ..CMD420-421_D00101_M_XXEN/07.2016...

  • Page 43: Device Information Query

    Operation and configuration 5.5.11 Device information query This function is used to query the software version (1.xx). 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 buttons..
  • Page 44 Operation and configuration CMD420-421_D00101_M_XXEN/07.2016...

  • Page 45: Technical Data

    Basic insulation between:................ (k1, l1, k2, l2, k3, l3) - (A1, A2), (21, 22, 24) Basic insulation between:...................... (11, 12, 14) - (21, 22, 24) Voltage test acc. to IEC 61010-1 ......................... 2.21 kV Supply voltage CMD420-D-1, CMD421-D-1: ............................Supply voltage U ......................AC 16…72 V / DC 9.6…94 V Frequency range U ............................
  • Page 46 Transformation ratio n ..........................1…2000 (1)* Relative uncertainty in the range of 42…460 Hz................±5 %, ±2 digits Hysteresis ............................3…40 % (15%)* Measuring circuit CMD421 Nominal measuring range (r.m.s. value)......................AC 0…5 A Overload capability, continuous ..........................7.5 A Overload capability < 5 s ................for screw-type terminal connection 20 A .........................
  • Page 47 Display....................... LC display, multifunctional, not illuminated Display range, measured value (r.m.s. value) x transformation ratio n.........CMD420: AC 0…1 A x n ..............................CMD421: AC 0…5 A x n Relative uncertainty in the range of 42…460 Hz................±5 %, ±2 digits Measured-value memory (HiS) for the first alarm value ..........data record measured values Password...........................on/off / 0…999 (OFF)*...
  • Page 48 Technical data Environment/EMC EMC................................IEC 61326-1 Operating temperature .......................... -25…+55 ºC Classification of climatic conditions acc. to 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) ..............

  • Page 49: Standards, Approvals And Certifications

    Technical data DIN rail mounting acc. to..........................IEC 60715 Screw fixing ......................... 2 x M4 with mounting clip Software version CMD420..........................D287 V1.1x Software version CMD421..........................D294 V1.1x Weight ................................≤ 150 g ( )* = factory setting 6.2 Standards, approvals and certifications 6.3 Label for modified versions...

  • Page 50: Ordering Details

    B73060007 15…460 Hz terminals) AC/DC 70…300 V CMD420-D-2 0.1…1 A x n B93060007 15…460 Hz CMD421-D-1 AC 16…72 V/ DC 9.6 V…94 V (push-wire 0.5…5 A x n B73060008 DC15…460 Hz terminals) AC 16…72 V/ DC 9.6 V…94 V CMD421-D-1 0.5…5 A x n...
  • Page 51 INDEX Installation and connection 21 Intended use 14 Adjustable parameters, list 29 Automatic self test 17 K1: assignment alarm category 29 K2: assignment alarm category 29 Delay on release toff 18 Deleting the fault alarms 28 LED Alarm 1 lights 28 Description of function 15 LED Alarm 2 lights 28 Device features 15...
  • Page 52 Ordering information 50 Training courses 10 Parameter query and setting, overview 32 Window discriminator function 16 Parameter setting Wiring diagram 23 - Activating or deactivating the pass- Work activities on electrical installations 13 word protection 41 workshops 10 - Activating the fault memory 36 - Assigning alarm categories to the alarm relays 37 - Changeover from overcurrent opera-...
  • Page 56 Bender GmbH & Co. KG P.O. 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 Photos: Bender archives...

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