Surge protection

We are experienced installers of surge protection systems in and the West Midlands. We also specialise in surge protection testing and offer installation and maintenance of all our surge protection systems.

Surge Protective Devices (SPDs)
Surge protective devices (SPDs) are primarily designed to safeguard electrical and mechanical equipment against temporary excess voltage and/or current.

The potential disruption and cost to a business or organisation not protected against surge protection is often difficult to quantify, but in the modern world where so many rely on uninterrupted functioning of IT systems it doesn’t take too much imagination to project the effect to a business that without warning suddenly looses all access and dependency of it’s IT systems.

The modern world has long taken for granted the need to protect the fabric and contents of buildings and structures against the effects of lightning but it is only recently that a greater appreciation has been established for the need to protect IT infrastructure following a notable increase in insurance claims related to damage and loss caused by surge related damage.

What is a Surge?
A surge is a short duration voltage spike that appears on either mains or a low voltage cable i.e telephone or computer line, whilst this surge can result from other sources other than lightning surges caused by lightning tend to be of a much higher level and subsequently have a potential to be much more dangerous and damaging.

The first stroke of lightning during a thunderstorm can produce peak currents ranging from 1,000 to 100,000 Amperes with rise times of 1 microsecond. It is hard to conceive of, let alone protect against, such enormous magnitudes. Fortunately, such threats only apply to direct hits on overhead lines. Hopefully, this is a rare phenomenon.

More common is the induced surge on a buried cable, in one test, lightning-induced voltages caused by strokes in ground flashes at distances of about 5 km were measured at both ends of a 448 meter long, unenergized power distribution line.

How is Surge Protection implemented?
When installing surge protection the first line of defence is always the mains power feed due to the fact that the mains power feed will always tend to be the primary entrance for a voltage spike before it then spreads into all other associated systems.

In addition to safeguarding the mains power feed independent surge protection is often recommended and installed to protect building management systems, fire and intruder alarms and CCTV.