Don’t Take Any Chances With Surge Voltages

Surge graphWhat are surge voltages and what harm do they cause?

Surge voltages are short, pulse like, voltage peaks with steep rising edges and are also known as transients.

The origin of these transients can be external, i.e lightning, but is much more likely to be caused by your own equipment, i.e switching of motors or transformers or the interruption of a short circuit by protective measures.

Year by year problems caused by these types of surges are increasing and are responsible for millions of pounds worth of damage. A lot of the time the user is not even aware that a surge caused the problem and puts it down to premature component failure.

Switching operations triggered mechanically or electronically generate pulse- like and high frequency interference voltages. Unimpeded these voltages can spread across a cable network. All the devices within this cable network are affected. Data errors, uncontrolled functions, and system crashes can result, with electronic devices at particular risk.

All of these problems can be eliminated, by the use of an appropriate surge protection device.

So what do you have to do to protect your plant?

Effective surge protection is always based on the protective circle principle.

Imagine the system you need to protect inside a protective circle. The area inside the circle (protected volume) is conceived to prevent interferences of surge voltages from the outside. All electrical circuits entering or leaving the protective circle are therefore equipped with surge protective devices:

• Power lines

• Measurement and control technology

• Data networks

• Telecommunications systems

• Standard interfaces

• Transmission/ reception systems

Example of Protected volume:

Surge protectionWant proof that transients really can damage your equipment?

A mobile demonstration vehicle is making a UK wide tour between the 23rd of September and the 4th of October. With product innovations, safety concepts, live detonation tests and all the information you need on the topic of surge protection.

If you would like a visit from the Infomobile vehicle please send an e mail with your contact information to Fraser Cowie at This email address is being protected from spambots. You need JavaScript enabled to view it. who will contact you to discuss the details involved.

appNew app explains surge protection!

Phoenix Contact also has a new surge protection app for Smartphones available in Google Play and App Store.

With this app, we provide electricians with an easy to use and modern tool to convince their customers of the necessity of surge protection.

Want to learn more about Surge Protection? Visit our online interactive learning modules- you can learn about the basics of surge protection, right up to the applications of different devices from Phoenix Contact.

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