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Type 1 or 2 surge protection to consumer units within flatted development?

Jamie Falconer

IDNO supply up the building i.e. Bemco boards then communal metering to consumer units within each apartment. Building has LPS.

Type 1 +2 surge protection has been installed to landlord common areas switchboard.

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  • What is the value of the nominal lightning impulse current (Iimp) per pole that you have chosen? If the building has a lightning protection system (LPS) or is within 50 m of a lightning conductor, a type 1 surge protection device (SPD) should be installed at the main switchboard. Then, a type 2 SPD should be installed at the distribution boards that are 10 m away from the main switchboard. Finally, a type 3 SPD should be installed at the sensitive equipment that requires further protection and is 10 m away from the distribution boards.

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  • What is the value of the nominal lightning impulse current (Iimp) per pole that you have chosen? If the building has a lightning protection system (LPS) or is within 50 m of a lightning conductor, a type 1 surge protection device (SPD) should be installed at the main switchboard. Then, a type 2 SPD should be installed at the distribution boards that are 10 m away from the main switchboard. Finally, a type 3 SPD should be installed at the sensitive equipment that requires further protection and is 10 m away from the distribution boards.

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