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One device? two charging standards

ID: 1564718

Insulation monitoring for DC charging stations

(PresseBox) - Until now, two different devices have been required for monitoring depending on the DC charging standard, which has meant double warehousing for manufacturers. With the new insulation monitoring device isoCHA425HV+AGH420-1, Bender has developed a combination device that supports the two common charging standards (CCS and CHAdeMO). The DC charging station is safely monitored in the process.

A galvanically isolated Modbus RTU interface can be used to switch between CCS and CHAdeMO. The individual parameters are pre-stored for the respective standard and then automatically selected. The device is designed for voltages of up to 1,000

In addition to monitoring the insulation level, the isoCHA425HV+AGH420-1 is also capable of measuring the nominal voltage during charging and generating a report if the voltage exceeds or drops below self-defined limit values. Furthermore, the system leakage capacitance of the charging station and the vehicle is monitored and, if insulation faults occur, the fault location is displayed (DC+/DC-/symmetrical). This helps the service technician to assess the status of the charging station and facilitates fault location.

If monitoring for symmetrical (two-pole) and asymmetrical (single-pole) faults is mandatory for CCS, tripping in case of asymmetrical insulation faults with a response time of ?

This is a major benefit compared to conventional monitoring devices for DC charging stations according to CHAdeMO, as so far, they only monitor single-pole faults and do not detect symmetrical faults. The cause of symmetrical faults, however, is mainly moisture combined with dust, dirt or road salt. These factors lead to ageing of the charging cables, which generally results in a consistent drop in the insulation level, so that, in the event of symmetrical faults, there was no tripping, even though the insulation level had dropped. This makes it possible to increase the protection level in CHAdeMO mode, as symmetrical faults are also detected, which leads to significantly more safety.





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Protection of persons, fire and plant protection
Bereitgestellt von Benutzer: PresseBox
Datum: 16.02.2021 - 04:16 Uhr
Sprache: Deutsch
News-ID 1564718
Anzahl Zeichen: 2411

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Research & Development


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"One device? two charging standards
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