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Guide to
| Surge Protection Devices
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Surge protective devices (SPD) assist in the protection
of valuable electrical and electronic equipment against
transients, originating from lightning and also from switching
sources.
These transients can cause damage ranging from the
premature ageing of equipment, logic failures and down time,
to the complete destruction of equipment within the entire
electrical installation. Products such as LCD screens, data
servers and industrial equipment such PLC’s are critical to
business activity. Protecting this equipment may now be a
necessity.
The Hager SPD range of solutions may offer protection to
prevent damage to this sensitive equipment by diverting the
damaging transient over-voltages. In the majority of cases this
will eliminate equipment failures and reduce downtime.
The choice of a surge protective device depends upon:
• The exposure of the building to lightning transients
• The sensitivity and value of the equipment that requires
protection (it is recommended that the contractor should
discuss the installations requirements with the customer)
• The location and therefore the exposure level of the
installation
• The equipment used within the installation and whether this
equipment could generate switching transients
Risks of electrical surges