40A 30mA Type B RCD (WEV240B-030)
£125.00
£148.00
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WEV240B-030 is a 40A 30mA Type B RCD designed for applications where smooth DC residual currents and higher-frequency AC residual currents may be present. Suitable for EV charger installations, solar PV systems, UPS systems and frequency converters, it provides broader protection than conventional RCD types. Where a standard RCD is...
WEV240B-030 is a 40A 30mA Type B RCD designed for applications where smooth DC residual currents and higher-frequency AC residual currents may be present. Suitable for EV charger installations, solar PV systems, UPS systems and frequency converters, it provides broader protection than conventional RCD types.
Where a standard RCD is not sufficient, this Type B device provides the broader leakage detection needed for inverter-driven and specialist electrical applications. Its compact 2 pole format makes it suitable for integration into compatible distribution boards where Type B protection is required.
Installer Tip: Always check whether the equipment manufacturer specifies a Type B device before installing a Type A alternative on EV or inverter-led circuits.
Key Features
- 2 Pole Type B RCD – WEV240B-030
- 40A rated current
- 30mA sensitivity
- Provides protection against DC residual fault currents
- Detects AC residual fault currents up to 1000Hz
- Suitable for EV, RV, solar, UPS, and frequency converter applications
- Dimensions: 54 x 87 x 79.5mm
Also see: Type B RCBOs for combined overload and residual current protection, or PME fault detection units for EV installations on TN-C-S supplies.
Other Type B RCDs in the Range
| Model | Configuration | Best For |
|---|---|---|
| WEV240B-030 | 2 Pole • 40A • 30mA Type B RCD | Domestic EV chargers, solar PV and inverter-driven systems |
| WEV263B-030 | 2 Pole • 63A • 30mA Type B RCD | Higher-current single-phase EV, solar PV and renewable installations |
| WEV463B-030 | 4 Pole • 63A • 30mA Type B RCD | Three-phase EV chargers, solar PV systems and commercial installations |
When is a Type B RCD used?
Type B RCDs are used where DC residual fault currents or higher-frequency AC residual currents may be present, such as EV chargers, solar PV systems, UPS equipment, and frequency converters.
Is WEV240B-030 suitable for EV charger installations?
Yes. This model is suitable for EV charger applications where Type B residual current protection is specified.
What does this device detect that other RCDs may not?
Unlike standard RCDs, the WEV240B-030 detects AC residual currents, pulsating DC residual currents and smooth DC residual currents. It is also suitable for higher-frequency applications up to 1000Hz, making it suitable for EV chargers, solar PV systems, UPS equipment and frequency converters.
What are the dimensions of this RCD?
The dimensions are 54 x 87 x 79.5mm.
Are other ratings available in the same range?
Yes. The same Type B RCD range also includes higher-rated 2 pole and 4 pole variants for applications requiring different current capacities.
| Product Code | WEV240B-030 |
| Device Type | Type B RCD |
| Poles | 2 Pole |
| Rated Current | 40A |
| Residual Current Rating | 30mA |
| Residual Current Detection | AC, Pulsating DC & Smooth DC |
| High Frequency Performance | Up to 1000Hz |
| Module Width | 3 Module |
| Dimensions | 54 x 87 x 79.5mm |
| Standards | IEC/EN 61008-1 & IEC/EN 62423 |
Installation must be carried out by a qualified electrician in accordance with BS 7671 and the equipment manufacturer’s requirements. Type B RCDs are used where DC residual fault currents or higher-frequency leakage may be present.
- Mount on a compatible DIN rail within a suitable enclosure or distribution board
- Confirm the circuit specifically requires Type B protection before installation
- Tighten all terminations to the correct manufacturer torque settings
- Test the device using suitable test equipment during commissioning
