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DCS-23-Bender-IsoCHA425-400.jpg

March 31, 2021

Bender, a manufacturer of electrical safety products worldwide, has recently released a new insulation monitoring device, the isoCHA425HV+AGH420-1, that meets both common charging standards: CSS and CHAdeMO. This will benefit EVSE manufacturers that employ both systems in a single DC fast charging station. Until now, two different devices have been required for insulation monitoring in DC fast charging stations.

A galvanically isolated Modbus RTU interface is available for communication with the device. Customer-specific parameters are preset for the respective standard. Changes to the settings can be accomplished via a pushbutton and menu structure on the device or via the Modbus protocol. The device is designed for voltages of up to 1,000 V, thus already taking ever increasing battery voltages into account.

In addition to monitoring the insulation level, the device is also capable of measuring the nominal voltage during charging and will alarm 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. If insulation faults occur, the fault location is displayed (DC+/DC-/symmetrical). This helps the service technician assess the status of the charging station and facilitates fault location.

Technical features:

  •    -   Fast trip on asymmetric faults ≤ 1 second
  •    -   Trip on symmetrical faults
  •    -   Voltage measurements up to 1,000 V
  •    -   Modbus RTU communication


This is a major benefit compared to conventional insulation monitoring devices for DC charging stations. According to CHAdeMO, typical IMIs only monitor single-pole faults and do not detect symmetrical faults. Environmental factors can lead to aging of the charging cables, which generally results in a consistent drop in the insulation level, so that, in the event of symmetrical faults, there is no tripping, even though the insulation level has dropped. The Bender IMIs features make it possible to increase the protection level in CHAdeMO mode which leads to an increase in safety for users and equipment.

Source


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DCS Put to the Ultimate Test Part 1 Torsion Tests by HELUKABEL 1 400x275

Cables and wires in industrial robots and other moving machine parts are often required to withstand extreme stresses caused by torsion. Constant repetitive movements put materials under considerable strain. At the same time, operators expect components to function perfectly and reliably throughout their entire service life to avoid disruptions, outages and safety hazards.

For this reason, at HELUKABEL, we simulate intensive and continuous torsion stresses under realistic conditions with our high-tech testing equipment in Windsbach. We have several types of apparatus for doing this because some of our customers, for example those in the automotive industry, have very precise specifications for how a torsion test is carried out. The tests show that our cables and wires withstand speeds up to 1,000°/s, accelerations up to 2,000°/s² and torsion angles up to 720°. Hence, we make sure that each product always meets our customers’ high standards, and that they receive the impeccable quality they rightly expect from us as a leading supplier of cables, wires and accessories for more than 40 years.

What Is Torsion?

 

To learn the answer, click here 

 


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