Description
Type B 40A RCD for EV Charging Stations
A Type B Residual Current Device (RCD) is a critical safety component specifically designed for modern electrical loads, particularly Electric Vehicle (EV) charging systems. While standard RCDs (Type AC or Type A) protect against common AC leakages, Type B RCDs provide comprehensive protection by detecting smooth DC residual currents.
Key Features and Specifications
Current Rating: 40A (Ideal for standard 7kW to 22kW AC EV chargers) and Input Power side of DC Fast Chargers.
Leakage Detection: Detects AC, pulsating DC, and smooth DC residual currents.
Sensitivity: Typically 30mA for life safety and fire protection.
Standards Compliance: Manufactured according to IEC/EN 62423 (Type B requirements) and IEC/EN 61008-1.
Why Type B is Essential for EV Charging
Modern EV on-board chargers can produce smooth DC leakage during the rectification process. Standard Type A RCDs are not designed to detect this and can even become “blinded” (saturated) by DC current, failing to trip during a genuine fault.
The Type B RCD prevents this by:
DC Fault Protection: Ensuring the circuit breaks if DC leakage exceeds 6mA (as per IEC 61851-1).
High Frequency Detection: Monitoring leakages at frequencies up to 1kHz or higher, common in EV power electronics.
Comprehensive Safety: Providing the highest level of protection for humans and infrastructure.
Technical Parameter
Common Application
In a typical home installation, a 40A Type B RCD acts as the primary protection for a Wallbox AC Chargers and DC Chargers for Electric Vehicles. It ensures that even if the car’s internal insulation fails, the power is cut instantly, preventing electric shock or damage to the household electrical system.
Best Plus Energy EV Charger – Reliable & Smart Charging Solution
Best Plus Energy, a more than 8 years AC and DC Electric Vehicle Charging Stations manufacturer, offers a Wall Box EV chargers designed for residential, commercial, and Standalone public charging stations for Electric Vehicle Charing Markets.
With universal compatibility, our EV Cargers support DC Fast Charging Standard CCS1 and CCS2, CHAdeMO, and GB/T, ensuring seamless charging for global EV models. Featuring OCPP integration, RFID authentication, and remote app control, it enhances user convenience and security. Its compact, space-saving design optimizes installation in parking lots, garages, and fleet operations. Built-in safety protections against overvoltage, overcurrent, and short circuits ensure reliable performance. Best Plus Energy provides OEM & ODM solutions, catering to EV charger distributors, wholesalers, and fleet operators worldwide. Join to Best Plus Energy to power the future EVs.
Contact Email: info@bestplusenergy.com
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