Measurements of SPD devices with the Sonel MIC-2511 meter. Detailed guidelines can be found:
✔️ in the instruction manual for MeasureEffect ► [ Ссылка ]
✔️ in standards: EN 62305-3, HD 60364-4-443
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*Chapters*
0:07 | Familiarize yourself with the standards.
0:17 | Preparing for measurements.
0:24 | Taking measurements and measurement results.
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SPDs (surge protecting devices) are used in facilities with and without lightning protection installations. They ensure the safety of the electrical installation in the event of an uncontrolled voltage surge in the network, e.g. due to lightning. SPDs for protecting electrical installations and devices connected to them are most often based on varistors or spark gaps.
A surge protector can be considered faulty when the breakdown voltage:
► exceeds 1000 V – then there is a break in the arrester and it does not have a protective function,
► is too high – then the installation protected by the arrester is not fully protected, as smaller overvoltage surges may penetrate it,
► is too low – this means that the arrester may discharge to the ground signals close to the rated voltage to ground.
