Surge protection devices

Surge protection devices are electrical equipment whose principal components are voltage dependent resistors (varistors, suppressor diodes) and /or dischargers. Surge protection devices are used to protect other electrical equipment and systems against excess overvoltages and to generate equipotential bonding.

 

Surge protection devices are subdivided as follows:

 

a) by their application into:

• Surge protection devices for power engineering systems and devices
• Surge protection devices for information technology system and devices

 

 

 

 

 

b) by their surge current conduction capacity into:

• High energy lightning current protectors for interference due to direct strikes or near misses
• Surge protectors for distant strikes, switching overvoltages and discharges of static electricity.