A safe EV charger needs five protection systems: overvoltage protection, overcurrent protection, residual current protection (RCD/RCBO), a surge protection device (SPD), and thermal protection. Installing a charger is not just plug-and-charge; these systems keep it safe, stable and cost-effective over the long term.
The 5 Essential Protection Systems
| Protection | What it does |
|---|---|
| Overvoltage protection | Prevents damage from voltage spikes and extends equipment life |
| Overcurrent protection | Reduces the risk of fire and damage to the electrical system |
| Residual current protection (RCD / RCBO) | Prevents electric shock and protects users |
| Surge protection device (SPD) | Protects against lightning-induced surges; very important in lightning-prone areas |
| Thermal protection | Prevents overheating and reduces the chance of equipment failure |
What Happens Without Proper Protection?
- The charger fails sooner
- Higher risk of short circuits
- Danger to users
- Higher maintenance costs over time
A good EV charger is not only one that charges; it must also be fully protected. Proper protection means a longer life, greater safety and lower future costs.
Frequently Asked Questions
Why is an RCD or RCBO needed for an EV charger?
It detects leakage current and cuts the power to prevent electric shock.
Is surge protection necessary in Thailand?
It is especially important in areas with frequent lightning, where surges can damage the charger.
ONVALLA’s Schneider and Grasen chargers include protection against overcurrent, short circuits and leakage, installed by trained technicians. See ONVALLA EV chargers, the EV charger page, or contact us.
