# EV charging residual-current detection

Canonical URL: https://eloragrid.ai/symbols/ev-residual-current-detection
Publisher: Elora Grid
Updated: 2026-10-27
Lookup label: RCD EV
Drawing use: Schematic
Reference families: Manufacturer

Residual-current detection checks for specified unintended current paths in a charging system.

## 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.

### 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.

### Terms

- Residual current: The imbalance assessed by the selected current-sensing arrangement.
- Trip signal: A command asking the associated switching device to interrupt its circuit.

Concept diagram: Monitored charging conductors → Residual-current detector → Trip or shutdown signal
Original functional explanation. Arrows show information or energy roles; two-headed arrows identify two-way interfaces. This is not a pinout, certified standards graphic or complete circuit.

- [AC electric vehicle charging architecture](https://www.ti.com/solution/ac-charging-pile-station)


## What it represents

Residual-current detection checks for specified unintended current paths in a charging system.
Charging equipment can use a detection result to request disconnection through its protective arrangement.
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. This is original functional artwork, not a certified standard graphic or device pinout.

## How to read it

- 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.
- A detector and the device that physically disconnects power are not automatically the same component.

## Information to show or 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.

## Important distinction

A detector and the device that physically disconnects power are not automatically the same component.

## Facts

- Representation type: Original functional block; not a certified IEC or IEEE graphic
- Concept input: Monitored charging conductors
- Concept output: Trip or shutdown signal

## Public references

- [AC electric vehicle charging architecture](https://www.ti.com/solution/ac-charging-pile-station) — Texas Instruments. AC electric vehicle charging architecture: public technical context for the named function. Product and compliance details remain with the publisher.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.