AC charging infrastructure - residual current monitoring
Bender application approach
Sensors and evaluation electronics monitor residual currents that may arise during AC charging. Bender’s OEM solutions integrate into wallboxes, charging stations and charging cables with control and protection electronics. Selection considers the charging mode, current types to be detected, applicable standard and the system’s disconnection arrangement.
Measuring current transformer or sensorDetection and evaluationSystem disconnection arrangement
As Bender’s distributor in Türkiye, ADEO Teknik supports OEM product selection and supply. RCM, RDC-DD, RCD and MRCD classifications are verified against the relevant product standard and completed system architecture.
In Mode 2 charging, an IC-CPD-equipped cable contains the control and protective arrangement. Bender provides sensor solutions for cable manufacturers in the context of IEC 62752. Mode 3 uses a fixed wallbox or charging station, where the sensor, evaluation circuit and charge controller are integrated into a suitable protective architecture. Selection therefore requires more than identifying an AC charging application. Cable or station integration, supply conditions, available space and the target standard must be established. Variants within one sensor family should be checked for their intended application.
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Detection scope of RDC and RCMB products
RDC104-4 is a module for detecting DC residual currents in AC charging systems. The manufacturer describes RCMB104 and benvac RCMB121/RCMB123 as AC/DC-sensitive solutions. For RCMB104, the measuring transformer, PCB connection and applicable standard are considered by variant; the IEC and UL versions have different thresholds. RCMB121 includes self-monitoring and test functions. These details should be evaluated separately for each product. The required waveform detection, mechanical integration and signals passed to the controller are matched against that product’s documentation.
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From detection signal to the disconnection arrangement
In the RDC104-4 example, the module works with a compatible measuring transformer such as CTBC17 and a type A RCD provided in the installation. Switch1/Switch2 indicate a limit being exceeded; the system design includes a suitable switching device and driver circuit. The module’s 6 mA DC detection function does not make it a standalone RCD that disconnects the power circuit. RDC-DD assessment under IEC 62955 covers the combined arrangement. The manufacturer requires the controller to test the module before every charging process, with charging disabled during the test.
BENDER DISTRIBUTOR IN TÜRKİYE · ADEO TEKNİK
Models for this application
Open model details, variants and manufacturer documents from the product images.
AC/DC-sensitive OEM module with an external measuring current transformer for Mode 2 AC charging equipment; IEC 62752/IC-CPD or UL 2231-2 coverage depends on the variant.
