4 Pole B-Type RCDs
The WCED 4 Pole Type B RCD is designed to provide advanced protection for circuits where smooth DC and high-frequency fault currents are present. Fully compliant with IEC/EN 62423, it safeguards against both AC and DC residual currents up to 1000 Hz, making it suitable for modern applications where standard...
The WCED 4 Pole Type B RCD is designed to provide advanced protection for circuits where smooth DC and high-frequency fault currents are present. Fully compliant with IEC/EN 62423, it safeguards against both AC and DC residual currents up to 1000 Hz, making it suitable for modern applications where standard Type A devices are not sufficient.
Trusted by electricians for EV, UPS, and renewable installs, this unit is available in 40A and 63A ratings. It delivers reliable fault disconnection and compliance with 18th Edition requirements.
- Detects and trips on AC, pulsating DC, and smooth DC residual currents
- Essential for EV chargers, UPS, solar, and high-frequency power converters
- Complies with IEC/EN 62423 for Type B residual current devices
- Available in 40A and 63A variants
- 230/400V AC rated
Image for illustrative purposes only.
What is a Type B RCD used for?
Type B RCDs are designed for circuits where DC residual currents may occur — such as EV chargers, UPS systems, solar inverters, and variable frequency drives. They ensure safe disconnection where Type A or AC devices may not trip.
Do I need a Type B RCD for EV chargers?
Yes, many EV charger manufacturers require a Type B RCD for compliance. Always check manufacturer guidance and local DNO requirements.
What variants are available?
This model is available in 40A (WEV440B-030) and 63A (WEV463B-030) options, both with 30mA sensitivity.
Does this RCD comply with UK regulations?
Yes, it meets IEC/EN 62423 standards and supports compliance with the 18th Edition Wiring Regulations.
- Type: Type B RCD
- Pole Count: 4 Pole
- Rated Current: 40A or 63A
- Sensitivity: 30mA
- Voltage Rating: 230/400V AC
- Frequency Response: AC/DC residual currents up to 1000 Hz
- Standards: IEC/EN 62423
- Variants: WEV440B-030 (40A), WEV463B-030 (63A)
This product must be installed by a qualified electrician in line with BS 7671 (18th Edition) regulations. Type B RCDs are required where smooth DC leakage currents may be present, such as inverter-driven systems and EV chargers.
- Ensure correct selection between 40A and 63A based on circuit load
- Install in a suitable enclosure with adequate ventilation
- Check earth fault loop impedance to confirm disconnection times
- Label circuits clearly for inspection and handover
