WCED WRB140B-030 Bi-Directional RCBO
The WCED WRB140B-030 Bi-Directional RCBO is a 40A B Curve, Type A high-immunity protective device from the Whitecliffe Electrical WRB1 range. Designed to combine overload, short-circuit and residual current protection within a compact single-module enclosure, it offers 30mA residual operating sensitivity and a 6kA breaking capacity.
With its bi-directional design, switched live and neutral, and flexible terminal arrangement, the WRB140B-030 is suitable for appropriately designed domestic and commercial electrical circuits. It can also be considered for compatible solar photovoltaic installations where power flow may occur in either direction.
Key Features
- 40A rated current with B Curve tripping characteristic
- Type A high-immunity residual current protection
- 30mA residual operating sensitivity
- 6kA rated short-circuit breaking capacity
- Bi-directional design for suitable solar PV applications
- 1P+N arrangement with switched live and neutral
- Compact single-module housing, approximately 18mm wide
- Electronic residual current detection with thermal-magnetic overcurrent release
- Bi-connect terminals for compatible cable and busbar connections
- Contact position indicator
- 35mm DIN rail mounting
- IEC 61009-1 and EN 61009-1 standards
40A B Curve Overcurrent Protection
The WRB140B-030 provides 40A overcurrent protection with a B Curve tripping characteristic. B Curve devices are generally selected for circuits with relatively low inrush currents, subject to circuit design, cable ratings and the applicable disconnection requirements.
By integrating overcurrent and residual current protection in one device, the RCBO protects its assigned circuit independently, helping maintain supply to other circuits during an individual fault.
Bi-Directional Capability for Solar PV Circuits
The WCED WRB140B-030 Bi-Directional RCBO belongs to the WRB1 range, designed for electrical systems where current may flow in either direction.
This characteristic can be useful in appropriately specified photovoltaic installations, where generation equipment and connected loads may create varying power-flow conditions. Suitability must be confirmed against the inverter specifications, protective requirements and distribution board arrangement.
The manufacturer’s installation instructions must be followed, including the specified bottom connection and relevant terminal markings.
Type A High-Immunity Residual Current Protection
The WRB140B-030 uses Type A residual current detection, responding to sinusoidal AC and pulsating DC residual fault currents. This offers a broader range of residual current detection than traditional Type AC devices.
Its 30mA residual operating sensitivity provides additional protection against electric shock when correctly selected and installed. The high-immunity designation is part of the manufacturer’s WRB1 range specification.
Switched Live and Neutral
The 1P+N configuration incorporates switched live and neutral conductors, allowing both to be disconnected when the protective device operates.
This arrangement supports circuit isolation and may simplify certain insulation resistance testing procedures, subject to the selected test method and any connected electrical equipment.
Compact Single-Module Design and Bi-Connect Terminals
Occupying approximately 18mm of DIN rail space, the WCED WRB140B-030 Bi-Directional RCBO offers a space-efficient solution for compatible consumer units and distribution boards.
Its bi-connect terminals accommodate compatible cable, pin-type and fork/U-type busbar connections. The manufacturer specifies a terminal tightening torque of 2.5Nm and installation on a standard 35mm DIN rail.
Technical Specifications
- Brand: WCED Whitecliffe Electrical
- Manufacturer Part Number: WRB140B-030
- Product Range: WRB1
- Product Type: Electronic Bi-Directional RCBO
- Rated Current: 40A
- Tripping Characteristic: B Curve
- Residual Current Classification: Type A High Immunity
- Rated Residual Operating Current: 30mA
- Rated Breaking Capacity: 6kA
- Number of Poles: 1P+N (Switched Live and Neutral)
- Rated Operational Voltage: 230V AC
- Rated Frequency: 50/60Hz
- Rated Insulation Voltage: 500V
- Rated Residual Making and Breaking Capacity: 3000A
- Rated Impulse Withstand Voltage: 4kV
- Residual Current Break Time at IΔn: ≤0.1 seconds
- Dielectric Test Voltage: 2kV for 1 minute
- Pollution Degree: 2
- Electrical Endurance: 2,000 operations
- Mechanical Endurance: 10,000 operations
- Contact Position Indicator: Yes
- Degree of Protection: IP20
- Reference Temperature: 30°C
- Operating Temperature: -5°C to +40°C
- Storage Temperature: -25°C to +70°C
- Top Cable Terminal Capacity: 10mm²
- Bottom Cable Terminal Capacity: 16mm²
- Busbar Terminal Capacity: 10mm²
- Terminal Tightening Torque: 2.5Nm
- Mounting: DIN Rail EN 60715 (35mm)
- Manufacturer-Specified Connection: From Bottom
- Applicable Standards: IEC 61009-1 / EN 61009-1
Other WCED B Curve Bi-Directional RCBOs
Looking for a different current rating? Explore other Type A high-immunity B Curve models from the WCED WRB1 range:
- WCED WRB106B-030 – 6A B Curve RCBO
- WCED WRB110B-030 – 10A B Curve RCBO
- WCED WRB116B-030 – 16A B Curve RCBO
- WCED WRB120B-030 – 20A B Curve RCBO
- WCED WRB132B-030 – 32A B Curve RCBO
WCED Whitecliffe Consumer Units and Circuit Protection
Browse our WCED Consumer Units or explore the complete WCED Whitecliffe range at Electrical4Less.
Always verify consumer unit compatibility, protective device selection and installation requirements before fitting. For solar PV circuits, confirm that the device meets the system manufacturer’s specified protection requirements.
