Residual current monitor type b with integrated measuring current transformers for earthed ac/dc systems (tn and tt systems) for comtraxx 2.1, option c (36 pages)
Single-channel ac and pulsed dc sensitive residual current monitor for ac systems (28 pages)
Summary of Contents for Bender LINETRAXX RCMA420
Page 1
Manual EN LINETRAXX® RCMA420 Residual current monitor for monitoring AC and (pulsed) DC currents I = 10…500 mA Δn in TN and TT systems RCMA420_D00059_05_M_XXEN/12.2023...
Indication of important instructions and information...............5 Signs and symbols............................5 Service and Support............................5 Training courses and seminars........................6 Delivery conditions............................6 Inspection, transport and storage......................6 Warranty and liability.............................6 Disposal of Bender devices..........................7 1.10 Safety..................................7 Function.......................8 Intended use..............................8 Device features..............................8 Function................................8 2.3.1...
Page 4
Table of contents Operation and setting..................13 Display elements in use..........................13 Function of the operating elements......................14 Menu structure...............................14 Display in standard mode..........................16 Display in menu mode..........................16 Parameter settings................... 18 Response value setting for overcurrent....................18 Fault memory..............................19 Alarm relays..............................19 Alarm categories............................20 Set the time delays............................21 Changeover: overcurrent/undercurrent/window mode..............
Protect from dust Temperature range Recycling RoHS directives Service and Support Information and contact details about customer service, repair service or field service for Bender devices are available on the following website: Fast assistance | Bender GmbH & Co. KG. RCMA420_D00059_05_M_XXEN/12.2023...
Regular face-to-face or online seminars for customers and other interested parties: www.bender.de > know-how > seminars. Delivery conditions The conditions of sale and delivery set out by Bender GmbH & Co. KG apply. These can be obtained in printed or electronic format. The following applies to software products: ‘Software clause in respect of the licensing of standard software as part of deliveries,...
LINETRAXX® RCMA420 Disposal of Bender devices Abide by the national regulations and laws governing the disposal of this device. For more information on the disposal of Bender devices, refer to www.bender.de > service & support. 1.10 Safety If the device is used outside the Federal Republic of Germany, the applicable local standards and regulations must be complied with.
Function Function 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 currents may occur. These are in particular loads containing six-pulse rectifiers or one way rectifiers with smoothing, such as converters, battery chargers, construction site equipment with frequency-controlled drives.
2.3.5 Functional faults If an internal functional fault occurs, all three LEDs flash. An error code will appear on the display (E01…E32). In such a case please contact the Bender Service. 2.3.6 Set the number of reload cycles If faults occur only temporarily, but recurrently, in the system being monitored, with the fault memory M deactivated, the alarm relays would switch synchronously to the error status.
Function If the residual current increases above or falls below the response value the response time t expires. After the expiry of the response time an alarm is signalled. A set response delay t (0…10 s) adds up to the device- on1/2 related operating time t and delays alarm signalling (total delay time t...
LINETRAXX® RCMA420 Installation, connection and commissioning Only skilled persons are permitted to carry out the work necessary to install, put into service and run a device or system. DANGER Risk of fatal injury due to electric shock! Touching live parts of the system carries the risk of: •...
Installation, connection and commissioning Wiring diagram –12V +12V CTX... CTUB101- S1(k) S2(l) CTBC... +12V –12V T 11 12 21 22 Terminal Connections A1, A2 Connection for supply voltage Us Socket for the connecting cable CTX… to the measuring current transformer Connection for combined test and reset button 11, 12, 14 Alarm relay K1...
LINETRAXX® RCMA420 Operation and setting Display elements in use A detailed description of the meaning of the display elements in use is given in the table below. RI. n12 > < onoffHysM Display-Elemente Element Function Reload function with memory = off (L = I.) Response value I as mA (Alarm 2, main alarm) Response valueI...
Operation and setting Function of the operating elements Operating elementes Element Function LED ON lighting continuously: Power On ON, green Flashing LED ON: System fault or connection monitoring fault LED AL 1 lights: Response value 1 reached (I AL1, yellow LED AL 2 lights: Response value 2 reached (I AL2, yellow Test button (>...
Page 15
LINETRAXX® RCMA420 Menu Sub menu Menu item Activation Adjustable parameter Fault memory Operating mode K1 (n.c.) Operating mode K2 (n.c.) Reload function (memory = off ) 1 Err Device error at K1 PrewarningI at K1 r1 I1 r1 (K1: assignment (output alarm category) Main alarm I...
Operation and setting Display in standard mode By default, the currently measured residual current is displayed. The current response values I1 (prewarning) and I2 (alarm) can be displayed using the Up and Down key. Press the Enter key to return to the measured value.
Page 17
LINETRAXX® RCMA420 Menu item Adjustable parameter Configuration of the fault memory and the alarm relays • Activate/deactivate the fault memory or assign continuous mode (on/off/con) • Select N/O operation (n.o.) or N/C operation (n.c.) individually for each K1/K2 • Specify the number of the reload cycles •...
Parameter settings Parameter settings An example is given here on how to change the alarm response value I1 (I ). It is presumed that the option Δn1 overcurrent (HI) has been selected in the SEt/I 12 menu (factory setting). Proceed as follows: Press the MENU/Enter key for more than 1.5 seconds.
LINETRAXX® RCMA420 Setting the hysteresis of the response values I Δn1 Δn2 > Fault memory Setting the fault memory to con mode Alarm relays Setting the alarm relay K1 to N/O operation (n.o.) RCMA420_D00059_05_M_XXEN/12.2023...
Parameter settings Setting the number of reload cycles > 1,5 s Alarm categories 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.
LINETRAXX® RCMA420 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 CAUTION 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)! Set the time delays The following delays can be set...
Parameter settings Setting the response delay t > 1,5 s t on t on t on t on Setting the starting delay t > 1,5 s Changeover: overcurrent/undercurrent/window mode The operating mode can be changed in the SEt/I 12 menu using the parameters HI, Lo and In. By default, overcurrent operation (HI) is set.
Page 23
LINETRAXX® RCMA420 Activating the password protection >1,5 s Changing the password >1,5 s Deactivating the password protection >1,5 s RCMA420_D00059_05_M_XXEN/12.2023...
Parameter settings Factory settings In this menu you can reset the device to its factory settings. Restoring factory settings ..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.
Appropriate action when error codes > 02 occur: Carry out a reset. Reset the device to E… factory setting. After eliminating the fault, the error code will be automatically deleted. If the fault continues to exist, please contact the Bender Service Tabular data ( )* = factory setting...
Page 26
Technical Data Insulation coordination acc. to IEC 60664-1/IEC 60664-3 Rated insulation voltage 100 V RCMA42x-D-1 Overvoltage category/pollution degree III/3 Rated impulse voltage 2.5 kV Rated insulation voltage 250 V RCMA42x-D-2 Overvoltage category/pollution degree III/3 Rated impulse voltage 4 kV Supply voltage Supply voltage range U AC 24…60 V / DC 24…78 V Operating range U...
Page 27
LINETRAXX® RCMA420 Response values Rated residual operating current I (prewarning, AL1) 50…100 % x I (50 %)* Rated residual operating current I (main alarm, AL2) AC / DC 10…500 mA (30 mA)* Hysteresis 10…25 % (15 %)* Specified time Starting delay t 0…10 s (0.5 s)* Response delay t (prewarning)
Page 28
Technical Data Switching elements Number of switching elements 2 x 1 changeover contact N/C operation/N/O operation Operating principle (N/C operation)* Electrical service life under rated operating conditions 10000 switching operations Minimum contact load (relay manufacturer's reference) 10 mA/5 V DC Contact data acc.
LINETRAXX® RCMA420 Connection rigid 0.2…2.5 mm (AWG 24…14) Connection flexible without ferrules 0.75…2.5 mm (AWG 19…14) properties flexible with ferrules 0,2…1,5 mm (AWG 24…16) Stripping length 10 mm Opening force 50 N Test opening, diameter 2.1 mm Other Operating mode continuous operation Position of normal use display oriented...
Technical Data RCMA420-D-1 RCMA420-D-2 Art. No. B 7404 3001 B 7404 3002 (B 7… = push-wire terminal) B 9404 3001 B 9404 3002 *Absolute values of the voltage range External measuring current transformers Innendurchmesser geschirmt Art. No. CTUB101-CTBC20 — B78120010 ø...
Page 31
LINETRAXX® RCMA420 Date Document version State/Changes Editorial revision 12.2023 Layout of the document RCMA420_D00059_05_M_XXEN/12.2023...