1.Type 2 (or Type 2+3) Surge Protectors are designed to be installed at the origin of the electrical installation or close to sensitive equipment to protect against transient voltages coupled into the Low Voltage network, if no LPS is used.
2.These Surge Protectors are testing following Class II tests from IEC 61643-11, with 8/20μs discharge currents.
3.In per pole : from 10kA to 100 kA
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Type 1 surge protectors
Type 1 surge protectors are designed to be installed when a direct lightning strike risk is high, especially when the building is equipped with external lightning protection system (LPS or lightning rod).
Type 2 surge protectors
Type 2 surge protectors are designed to be installed at the entrance
of the installation, in the main switchboard, or close to
sensitive equipment, on installations without LPS (lightning
rods).
Type 3 surge protectors
In case of very sensitive or remote equipment, secondary stage
of surge protectors is required : these low energy SPDs could be
Type 2 or Type 3 (see «Coordination of surge protector» page 20).
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