I-VBs indoor high-voltage vacuum circuit breaker iyidivayisi yangaphakathi enezigaba ezintathu ye-AC60Hz kanye ne-voltage elinganisiwe engu-12 KV esetshenziselwa ukulawula nokuvikela amadivayisi kagesi emabhizinisini ezimboni kanye nawezimayini, ezitshalweni zamandla, eziteshini ezishintshayo ze-transformer.
Okwamanje, ingasetshenziswa ezindaweni lapho kudinga ukusebenza njalo.