Surge Protection Products

Surge Protection Devices (SPDs) are a requirement of the 18th Edition Wiring Regulations and are designed to protect cables, switchgear and electrical equipment within a building by limiting transient overvoltages caused by atmospheric conditions and switching events and diverting current waves safely to earth.  BS 7671:2018 IET Wiring Regulations Eighteenth Edition states that: “Protection against transient overvoltages shall be provided where the consequence caused by overvoltage could result in: i.  serious injury or loss of human life  ii. significant financial or data loss” And also highlights 'Safety Services' defining them as “An electrical system for equipment provided to protect or warn persons in the event of ..

Safety, reliabilty, maintainability and cost-effectiveness are key within the Rail Transport industry.  Every-day switching events caused by nearby motors, generators, or electronic switching equipment will over time result in wear to equipment that may cause it operate less efficiently. Continued wear or a catastrophic event such as a lightning strike, may result in the failure of signalling, data communications or power distribution systems, and therefore costly delays and unplanned repairs.  PD Devices Ltd has worked closely with Rail and Tram Transport companies around the world to design a range of Surge protection solutions for rolling stock, railway structures, above and below-ground trackside ..

Global data-communications networks are an essential part of our homes, services and businesses. To avoid costly outages or data-loss, power and data cables supplying these networks and the equipment we use should be protected from the harmful effects of transient overvoltages caused by nearby lightning or switching activity, by fitting Surge Protective Devices. Equipment that should be protected include LANs, CCTV, Serial Interfaces,  PABX, PSTN, Fax, Modems and LTE and WiMax Networks. Products listed below represent just a few of the solutions we offer. If you don't see the assembly or specification you require listed below, please contact our technical team as ..

We manufacture a wide range of products to protect against the effects of high altitude detonation of Nuclear devices. The result of such an event is the generation of electromagnetic pulses, which induce a high voltage transient in exposed conductors. The resulting EMP may affect several thousands of square kilometres, with a magnitude of tens of kilovolts, and can result in serious damage to insulation, breakdown of semiconductors, and the consequent malfunction of critical equipment such as Energy Power Supply and Communications Systems. From low-voltage telecommunications and signal lines to high-current and voltage installations. From 10v, 5A continuous with a maximum surge ..

As the renewable energy industry grows, we see increasing use of solar (photovoltaic) panels, wind turbines and hydro electrical plants to convert natural energy sources into electricity for our consumption as a clean alternative to the fossil fuel industry. Electrical equipment within a building fitted with any of these means of power generation may be susceptable to the effects of transient overvoltages caused by atmospheric conditions. It's important therefore, that SPDs are fitted to protect cables and euqipment within the building. Products listed below represent just a few of the solutions we offer. If you don't see the asembly or specification you ..

Electricity power generation is a process of generating electric power from sources of primary energy; by electromechanical generators, primarily driven by heat engines fuelled by combustion or nuclear fission, or by other means such as the kinetic energy of flowing water and wind, solar photovoltaics and geothermal power. The plant and machinery used to create this power is susceptible to damage caused by nearby lightning strikes and transient over-voltages caused by other sources and should therefore be protected.  Our bespoke AZA series of MOV assemblies offers customised options for the overvoltage/surge protection of DC exciters and similar or allied systems.  A wide range ..

Electric power distribution is electricity power being carried from the transmission system to the consumers. This final stage of delivery of electric power distributes power through substations that connect to the transmission system and lower the transmission voltage to medium voltage ranging between 2 kV and 35 kV with the use of transformers.Primary distribution lines carry this medium voltage power to distribution transformers located near the consumer premises. Distribution transformers again lower the voltage to the utilization voltage used by lighting, industrial equipment or household appliances. All of the equipment used in this process needs protection from surges caused ..

At PD Devices we manufacture many different SPDs, we have produced MOVs for many years and our market requirements are forever evolving. Fairly new to our range of products are link boxes, but what are they and how do they work? Link Boxes are effective cable earthing connection boxes that can provide some really unique challenges, both in terms of physical and electrical requirements to produce and make up critical parts of high-voltage underground cable systems. A Link Box provides a sealed, weatherproof enclosure for bonding cable earths at what is the weakest point in the system – cable joints and ..

Power distribution units housed in rugged ABS or aluminium, with trailing leads and a wide variety of options including; Surge Protection, Noise and RFI filters, RCD or standard moulded plugs, with multi-way options 2,4,6,8 or 10 UK (BS1363), IEC (C13) or SCHUKO (CEE 7/3) sockets.  And if you don't see the socket strip you require in the categories below, contact our sales team to discuss other options that we can manufacture.  It it important to remember that although there may be space to plug in multiple appliances, this does not mean it is always safe to do so. Never overload an extension lead. Check ..

Satellite cables and RF antenna coax cables are inputs from the satellite and TV aerial, from outside coming in to the building, to the television equipment. These coaxial cables are also sometimes used to connect a VCR, DVD player, satellite box or even games consoles to the television set. All these devices can actually become at risk from surges entering the building via that coax cable from the satellite and TV aerial. Having a Type 3 (CLASS III) surge protected device (like a surge protected socket strip) on the inside of your building is protecting the items plugged in to ..

A Metal Oxide Varistor (MOV) is a semiconducting 'clamping' device which, under normal operating conditions has a very high resistance, but when the voltage across the varistor exceeds its rated value, the varistor's resistance decreases, and enables any overvoltage to be safely diverted to earth.  These are bipolar, non-linear resistors, with a symmetrical voltage/current characteristics curve and a resistance value which decreases as the voltage increases. Features include: High Energy and Current withstand capability. Low clamping Voltage Fast Response (typically 5 nanoseconds) Suitable for AC and DC applications Bipolar operation Very low leakage current PD Devices Ltd is a leading designer and manufactuer of MOV, one ..