Three Phase PME Fault Detection Consumer Unit for Multiple Charge Points
The WMTP series is a range of 3-phase PME fault detection distribution boards, designed to protect multiple EV charge points without requiring an earth rod. Each unit features built-in PME fault detection, Type 2 surge protection, and pre-fitted 40A RCBOs - providing full disconnection of all phases and earth in...
The WMTP series is a range of 3-phase PME fault detection distribution boards, designed to protect multiple EV charge points without requiring an earth rod. Each unit features built-in PME fault detection, Type 2 surge protection, and pre-fitted 40A RCBOs - providing full disconnection of all phases and earth in the event of a PEN fault.
Available in 2, 3, or 6 output variants, these boards are ideal for EV charging hubs, forecourts, commercial installs, or high-demand residential applications where full regulation compliance and user protection are critical.
- PME/PEN fault detection – disconnects all phases + earth on fault
- No earth rod required – complies with 18th Edition Amendment 2
- Fitted with Type A 40A RCBOs (select 2, 3, or 6 output variants)
- Built-in Type 2 SPD – with status indicator (Green = OK, Red = Replace)
- 3-phase input, single- or three-phase output depending on variant
- Shunt reset relay system – automatic or manual depending on fault type
These PME detection boards are purpose-built to meet the latest EV installation standards, offering safe and regulation-compliant deployment of multiple charge points - without the complexity or risk of earth electrode installations.
Do I still need an earth rod with this unit?
No – the built-in PME fault detection system replaces the need for an earth rod in most EV installations. It isolates all phases and earth on fault detection.
What’s the difference between the variants?
WMTP28-R40CSP includes 2 x 40A 4P RCBOs. WMTP36-R40CSP includes 3 x 40A 4P RCBOs. WMTP28-WER40CSP is pre-fitted with 6 x single-phase RCBOs for multiple 1P EV chargers.
How does the fault detection work?
The PME relay monitors line voltages and disconnects the supply and earth if voltage drops below or exceeds defined thresholds — preventing dangerous rise of touch voltage in the event of a PEN fault.
- Product Codes:
- WMTP28-R40CSP – 2 x 40A 4P RCBOs
- WMTP36-R40CSP – 3 x 40A 4P RCBOs
- WMTP28-WER40CSP – 6 x 40A 1P+N RCBOs
- Main Switch: 100A / 400V 3P+N
- RCBOs: 40A, Type A, B Curve, 30mA
- PME/PEN Fault Relay: 5-pole breaker with shunt trip & reset
- Voltage Monitoring: 207V–253V AC, 4s delay per phase
- Surge Protection: Type 2 SPD, status LEDs
- Enclosure Rating: IP40 (indoor use)
- Standards: BS EN 61439-3 / BS EN 61643-11 / BS7671
- Dimensions (WMTP28): 500mm (W) x 304mm (H) x 112mm (D)
Install as the main incomer for multiple EV charge points. Designed for use on PME earthing systems where a traditional earth rod is not permitted or practical. Automatically disconnects all poles and earth if a PEN fault is detected. Reset behaviour varies by fault type (manual reset for overvoltage, auto for undervoltage).
- Supply: 400V 3-phase
- Outputs: 1P+N or 3P+N depending on variant
- Shunt trip system included
- Always install in accordance with BS7671 and building regulations
