3 Phase PME Fault Detection Unit 40RSP (WARB5100C/PME40RSP)
18th Ed. Compliant
2-Year Warranty
UK Stock
Free Delivery £30+
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Pre-wired in the UK and built to order – allow up to 3 working days for dispatch. The WARB5100C/PME40RSP is the all-in-one 3 Phase PME Fault Detection Unit. It combines a 100A MCB main switch, integrated PME relay, a 40A Type A RCBO, and a Type 2 SPD. This ensures...
Pre-wired in the UK and built to order – allow up to 3 working days for dispatch.
The WARB5100C/PME40RSP is the all-in-one 3 Phase PME Fault Detection Unit. It combines a 100A MCB main switch, integrated PME relay, a 40A Type A RCBO, and a Type 2 SPD. This ensures full compliance with BS7671:2018+A2:2022, protecting against PME/PEN loss, overcurrent, residual leakage, and transient overvoltages – all in one board.
Designed for EV charging hubs, solar PV, and 3-phase commercial installs, it gives installers a single-box solution for the highest level of site safety and fault resilience without requiring an earth rod.
Installer Tip: This variant provides the broadest protection in the PME range. Use it on critical EV/renewable installs where full RCBO + SPD coverage is required to pass compliance and minimise downtime.
Key Features
- PME Fault Protection: Disconnects all poles & earth on PEN loss
- 40A RCBO: Adds overload + residual current protection
- Type 2 SPD: Suppresses transient surges, visual status included
- 100A MCB Main Switch: Upstream protection and isolation
- Automatic Monitoring: Detects undervoltage & overvoltage across phases
- Reset Functions: Auto reset on undervoltage, manual reset for overvoltage
- Applications: EV chargepoints, PV systems, and sensitive 3-phase loads
Variant Comparison
| Model | Configuration | Best Use Case |
|---|---|---|
| WARB5100C/PME | 100A MCB + PME Relay | Base PME-only protection |
| WARB5100C/PMESP | 100A MCB + PME Relay + SPD | PME + surge suppression |
| WARB5100C/PME40R | 100A MCB + PME Relay + 40A RCBO | Adds overload + leakage protection |
| WARB5100C/PME40RSP (This Product) | 100A MCB + PME Relay + 40A RCBO + SPD | Full coverage for EV, solar & commercial installs |
| WARB5100C/PME63DRSP | 100A MCB + PME Relay + 63A RCBO + SPD | Higher load installs with full protection |
What makes this model different?
Unlike the base or RCBO-only variants, the 40RSP adds both residual/overload protection and Type 2 surge protection, making it the most complete mid-range option.
Does the SPD need replacing?
Yes – it includes a visual indicator (green = OK, red = replace). Always check during maintenance.
Do I still need an earth rod?
No – the PME relay provides PEN fault compliance without an earth rod.
What type of installs is this best for?
Critical EV or PV installs where both surge suppression and residual/overcurrent protection are required.
| Product Code | WARB5100C/PME40RSP |
| Rated Voltage | 400V / 415V (3 Phase) |
| Main Switch | 100A Curve C MCB (5-pole) |
| RCBO | 40A Type A RCBO |
| Surge Protection | Type 2 SPD (visual status) |
| Voltage Monitoring | 207V–253V per phase |
| Reset Functions | Auto reset (undervoltage), Manual reset (overvoltage) |
| Ingress Rating | IP40 (indoor use) |
| Standards | BS EN 61439-3, BS7671:2018+A2:2022 |
| Build Time | 3 working days |
Supplied pre-wired, labelled, and ready for connection. Installation must be by a qualified electrician in accordance with BS7671:2018+A2:2022.
- Isolate mains before installation
- Use correct gland fittings and torque (2.5Nm)
- Verify PME relay, RCBO & SPD operation during commissioning
- Indoor installation only (IP40 enclosure)
