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Surge Protection Selection

This document discusses overvoltage protection and surge protection devices (SPDs). It states that an SPD must always be installed at the origin of an electrical installation. The type of SPD installed depends on whether there is a lightning protection system. For SPDs at the incoming end, the minimum nominal discharge current is 5 kA and the voltage protection level must be less than 2.5 kV. Additional SPDs may be needed based on site size, distance to sensitive loads, and exposure risk. A table shows the quantity and types of SPDs required based on these factors.

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1meander23
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18 views1 page

Surge Protection Selection

This document discusses overvoltage protection and surge protection devices (SPDs). It states that an SPD must always be installed at the origin of an electrical installation. The type of SPD installed depends on whether there is a lightning protection system. For SPDs at the incoming end, the minimum nominal discharge current is 5 kA and the voltage protection level must be less than 2.5 kV. Additional SPDs may be needed based on site size, distance to sensitive loads, and exposure risk. A table shows the quantity and types of SPDs required based on these factors.

Uploaded by

1meander23
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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J - Overvoltage protection

A SPD must always be installed at the origin of 3.2 Elements of the protection system
the electrical installation.

3.2.1 Location and type of SPD

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Fig. J21 : The 4 cases of SPD implementation


Note : The Type 1 SPD is installed in the electrical switchboard connected to the earth lead of the lightning protection system.

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