An appliance designed to protect electrical devices from voltage spikes. Enhanced surge protectors are ideal for use on power distribution systems. To protect connected electronic equipment from transient overvoltages on the mains supply such as computers, communications and control equipment. Our surge protectors offer an advanced pre-warning so you can stay protected with repeated protection, in lightning prone environments. These products are easy to apply and have an innovative feature to disconnect safely from faulty supplies.

Very low let-through voltage between all lines (L-E, L-N, N-E)
LED status indication with pre-failure warning
Remote indication through volt-free contact
Robust steel housing
Neutral to Earth voltage warning

WBX 3 (456-8112) for ESP 240 M1
WBX 4 (798-3539) for ESP 415 M1

For part ESP 240 M1 (456-8112) the Network Rail approval applies – PA05/01832. NRS PADS ref: 086/047149

Protect your electrical devices and circuits from sudden voltage spikes with this surge suppressor unit from WJ Furse. It monitors excess voltage – such as that generated by a lightning strike – and diverts it from the mains system to the ground when a surge occurs. The unit's steel casing is durable and resistant to corrosion, so you can use it in harsh environments. Its backup fuse prevents short circuits and protects you from electric shocks. As it has a maximum surge current rating of 6.25A, this surge suppressor can withstand substantial power inrushes.

• Mounts to a DIN rail without the need for tools
• Light weight of 1kg so it's easy to handle
• IP50 (ingress protection) rated to withstand limited dust ingress
• Wide operating temperature range of -40°C to +70°C for use in demanding conditions

• Data server banks
• Electrical transmission and distribution plants
• Conveyor systems

This surge suppressor has a changeover active volt-free contact that alerts you in the event of a phase loss, either from a blown fuse or power failure.

Transient Voltage Suppressors (Modules,Industrial)

Voltage surges, often referred to as spikes or transient overvoltages are typically caused by switching of fluorescent lights, fuses blowing or nearby lightning activity. The worst voltage surges are usually caused by lightning activity and can reach up to 6000V, with current surges of up to 3000A. The maximum size of the voltage and current surges depends on the location within the buildings wiring system. BS6651:1999 Annex C which was replaced in August 2008 by BS EN 62305-4:2006 is complemented by BS EN 61643-11/12 and covers location categories and provides guidance on protection of electronic equipment. For mains power systems, Types I, II and III are used. Surge protection devices not designed to fit into these categories may only provide limited protection and the equipment they protect may suffer damage.