KM
Contactor
An electrically operated switching device commonly used for repeated switching duties.
SLD / Schematic
Symbols · RCD EV
EV charging residual-current detection
In plain English
What does EV charging residual-current detection mean?
Residual-current detection checks for specified unintended current paths in a charging system.
A simple example
Charging equipment can use a detection result to request disconnection through its protective arrangement.
What the drawings help you do
Show the conductors included in the measurement and the signal sent to the charging controller or protective device. The detector looks for a specified imbalance or leakage condition. Its block should not imply that sensing and opening the power circuit happen in the same physical component.
- Residual current
- The imbalance assessed by the selected current-sensing arrangement.
- Trip signal
- A command asking the associated switching device to interrupt its circuit.
Before using this reference
- Identify the conductors included in the detection arrangement.
- Reference the types of residual current the selected device detects.
- Show the trip or shutdown connection to the interrupting device.
Is this block a complete protective disconnection device?
Not necessarily. A detector may only issue a signal. The selected protective arrangement must identify the switching hardware and how the detected condition causes the required interruption.
Read the source: AC electric vehicle charging architecture
Schematic · RCD EV
A distinction that matters
A detector and the device that physically disconnects power are not automatically the same component.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
AC electric vehicle charging architecture
AC electric vehicle charging architecture: public technical context for the named function. Product and compliance details remain with the publisher.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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