WER High Immunity A Type RCBO's (Solar & EV)
The WER range of High Immunity Type A RCBOs offers dual protection against overload and earth leakage faults - with additional resilience against nuisance tripping in challenging environments. Each unit features a twin-handle indicator system, helping electricians quickly identify whether a trip was caused by overload or residual current fault....
The WER range of High Immunity Type A RCBOs offers dual protection against overload and earth leakage faults - with additional resilience against nuisance tripping in challenging environments. Each unit features a twin-handle indicator system, helping electricians quickly identify whether a trip was caused by overload or residual current fault.
With full double pole disconnection (live & neutral) and bi-directional functionality, these RCBOs are ideal for inverter-based setups such as solar PV or battery storage systems - and meet all requirements for modern EV installs.
Available Variants:
- WER**B-030: Type A, B Curve, 30mA, 6–40A options
- WER**C-030: Type A, C Curve, 30mA, 6–40A options
Key Features:
- High immunity to unwanted tripping from transient voltages or harmonics
- Detects AC and pulsating DC leakage (Type A)
- Twin switch indicators: overload vs residual fault status
- Double pole disconnection – cuts both live and neutral conductors
- Bi-directional wiring — suitable for inverter-fed circuits (e.g. solar)
- 10kA breaking capacity
- Complies with IEC/EN 61009
Ideal for: EV charger circuits, solar installs, battery systems, and general residential or commercial protection boards.
What’s the difference between the B and C curve RCBOs?
B curve RCBOs trip faster on low inrush loads (e.g. lighting). C curve models are designed for circuits with higher inrush currents (e.g. motors, EV chargers).
Why is ‘high immunity’ important?
High immunity RCBOs are designed to resist nuisance tripping caused by transient voltages, harmonics, or noisy equipment - especially important in solar and industrial environments.
What does ‘bi-directional’ mean?
These RCBOs can be wired either way round - ideal for inverter-fed systems (e.g. solar PV) where line and load orientation may vary.
Are these RCBOs suitable for EV charger circuits?
Yes - they are fully suitable for EV installations that do not require Type B RCD protection. Type A detection with high immunity is ideal for most domestic EV charge points.
How does the twin handle fault indicator work?
If the black handle trips only, it indicates an overload or short circuit. If both white and black handles trip, it’s an RCD trip. This helps electricians diagnose faults faster.
- Type: A (AC + pulsating DC leakage detection)
- Trip Current: 30mA
- Current Ratings: 6A, 16A, 20A, 32A, 40A
- Trip Curves: B and C curve variants available
- Poles: 2 (Double pole disconnection)
- Breaking Capacity: 10kA
- Indicator: Twin switch — separate overload and RCD handles
- Mounting: DIN rail
- Dimensions: 35mm (W) x 82mm (H) x 77mm (D)
- Wiring: Bi-directional (line/load reversible)
- Standards: IEC 61009 / EN 61009
This high immunity RCBO is designed for use in distribution boards where both overload and residual protection are required. The twin-handle design aids fault diagnosis and speeds up on-site testing. Suitable for use in domestic, commercial, and inverter-based systems (solar PV, battery storage, EV).
- Compatible with standard DIN rail boards
- Ensure current rating and curve suit connected load
- Use bi-directionally - line/load can be connected either way
- Match with correct enclosure or consumer unit configuration
