Overvoltage protections
- SJB Lightning current arresters - type 1
- SJBC Combined lightning current and surge voltage arresters - type 1 + type 2
- SVBC Combined lightning current and surge voltage arresters - type 1 + type 2
- SVC Surge voltage arresters - type 2
- SVM Surge voltage arresters - type 2
- SVD Surge voltage arresters - type 3
- SVF Surge voltage arresters - type 2
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