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Surge arresters
Protection against
lightning strikes and
overvoltages
Technical
Section 9
Dimensions
Section 10
PF Fixed surge arresters
The PF all-contained, multiple pole surge arrester range is especially adapted to
TT, TN-S and IT earthing systems. PF surges arresters with local indication (PF65r
and PF30r) have remote indication.
Each surge arrestor in the range has a specific use:
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Incomer end protection
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The PF65r is recommended for a very high risk level (highly exposed site)
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PF30r/PF30 are recommended for a high risk level
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The PF15 is recommended for a low risk level
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Secondary protection: the PF8 ensures the secondary protection of loads to
be protected and is placed in a cascading configuration with surge arrestors at
the incomer end
PRC/PRI
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Protection of telecommunications and computer equipment
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Lightning can also propagate through telecommunications and computer
networks
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It can damage all the equipment connected to these networks: telephones,
modems, computers, servers, etc
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PRC surge arresters are designed to protect equipment connected to analogue
telephone networks: lines, current or transmitter loops
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PRI surge arresters are designed to protect sensitive equipment, on digital
telephone and automated networks, and on computer or data networks