3 Phase Surge Protection in Metal Enclosure

The WCED WME3P40SP is a pre-assembled 3-phase surge protection unit housed in a durable steel enclosure – built to safeguard commercial, industrial, and EV installations from transient overvoltages. Each unit includes a 4-pole Type 2 SPD, making it fully compliant with BS 7671 (18th Edition Amendment 2) requirements.

Suitable for three-phase distribution boards, EV charger supplies, and industrial machinery feeds, this unit comes pre-assembled and tested for fast installation on site. All models are built to order with a 3-working day turnaround.

• 4-Pole Type 2 SPD included – protects against voltage transients
• Steel IP-rated enclosure – robust and regulation-ready
• Pre-assembled & tested – saves install time
• Applications: EV chargers, warehouses, panelboards, renewables
• Lead time: Built to order in 3 working days

For PME supplies, pair with our PME fault detection units to ensure EV compliance without installing a separate earth rod.

• SKU: WME3P40SP
• System Type: 3 Phase (L1, L2, L3, N, E)
• SPD Type: Type 2, 4 Pole
• Nominal Discharge Current (In): 20kA per mode
• Maximum Discharge Current (Imax): 40kA
• Enclosure Material: Metal-clad, surface mount
• Mounting: Pre-drilled for wall installation
• Dimensions: Approx. 240mm x 160mm x 112mm
• Conformity: BS EN 61643-11, IEC 61643-11

This surge protection unit is pre-built for fast, compliant install. Final wiring must be completed by a qualified electrician, ensuring all earth connections are short and direct.

• Mount enclosure securely to wall or control panel framework
• Connect L1, L2, L3, N, and earth as marked
• Keep earth leads as short as possible to minimise impedance
• Confirm system voltage and SPD compatibility before energising

What type of SPD is included?

The unit comes with a factory-fitted 4-pole Type 2 SPD, rated at 40kA discharge and suitable for TN-C-S, TN-S, and TT systems.

Is this suitable for EV installations?

Yes – it’s often specified for EV charger mains protection on commercial sites or large three-phase residential installs. For PME earthing systems, use with a PEN fault detection device for full compliance.

Does it come wired and assembled?

Yes – the SPD is pre-mounted and wired inside the metal enclosure. Only final terminations need to be made on site by a qualified electrician.

Can this unit be used indoors?

Yes – the metal housing is IP-rated for safe use in plant rooms, distribution cupboards, or sheltered outdoor cabinets.

What’s the delivery time?

All models are built to order and shipped within 3 working days from purchase.