3 Phase PME Fault Detection Unit with 40A RCBO (WARB5100C/PME40R)

Pre-wired in the UK and tested before dispatch – allow up to 3 working days for shipping.

The WARB5100C/PME40R is a 3 phase PME fault detection unit with a 40A RCBO for one compatible three-phase EV charge point. It combines a 5-pole 100A MCB, PME monitoring and a factory-fitted 40A RCBO in a pre-wired IP40 enclosure.

This version adds residual-current and downstream overcurrent protection to the base configuration but does not include a factory-fitted SPD. The exact RCBO characteristics and charger compatibility must be checked against the supplied device and manufacturer documentation before installation.

Key Features

• For one three-phase EV charge point
• 5-pole 100A MCB with integrated PME relay arrangement
• Factory-fitted 40A RCBO
• 400/415V supply monitoring
• Linked disconnection of live, neutral and protective conductor
• No factory-fitted SPD

How the PME Monitoring Works

The unit monitors the three-phase supply against the manufacturer’s stated voltage thresholds. If any phase falls below 207V or rises above 253V under the specified fault conditions, the linked switching arrangement disconnects live, neutral and the protective conductor.

Under-voltage recovery is automatic when the supply returns to the normal operating range. Following an over-voltage operation, the unit requires manual reset in accordance with the manufacturer’s instructions.

Final selection must be based on the charger, supply, fault level, earthing arrangement and required residual-current and surge protection. Installation and verification must be completed by a suitably qualified person to the current edition of BS 7671.

Compare 3 Phase PME Unit Variants

• Model: WARB5100C/PME40R
• Application: One three-phase EV charge point
• Rated voltage: 400/415V AC
• Frequency: 50Hz
• Factory-fitted MCB: 5-pole 100A
• Factory-fitted RCBO: 40A; confirm detailed characteristics from the supplied device
• SPD: Not included
• PME monitoring thresholds: below 207V or above 253V on any phase
• Fault switching: Live, neutral and protective conductor
• Reset: Automatic after under-voltage recovery; manual after over-voltage operation
• Enclosure: IP40
• Assembly standard: BS EN 61439-3

The WARB5100C/PME40R is supplied pre-wired and tested. Installation and commissioning must be completed by a suitably qualified person.

• Confirm the unit is being applied to one compatible three-phase EV charge point.
• Check the exact RCBO type, residual-current rating and charger requirements from the supplied device documentation.
• Coordinate the 100A MCB, 40A RCBO, conductors, supply and prospective fault current.
• Assess separately whether surge protection is required and where it is provided.
• Test PME isolation, RCBO operation and reset modes during commissioning.

What does the 40R version include?

It includes the WARB 100A MCB and PME monitoring arrangement plus a factory-fitted 40A RCBO.

Does it include surge protection?

No. The PME40R does not include a factory-fitted SPD; the PME40RSP version adds a Type 2 SPD.

What type of RCBO is fitted?

The manufacturer’s current range identifies a 40A RCBO but does not provide every characteristic in the product table. Confirm the exact device markings and documentation before specification.

How many EV chargers is it intended to serve?

The manufacturer describes this WARB unit family for one three-phase charge point.

Can it avoid a separate earth electrode?

The PME monitoring arrangement is designed for EV charging installations using automatic disconnection. Suitability must still be confirmed for the particular installation.