Le mveliso ingasetyenziswa kwinkqubo yangaphakathi ye-50Hz kunye ne-voltage elinganisiweyo ye-12kV. Ingaphula nayiphi na i-fault current phakathi kwe-fuse melting current kunye ne-rated break, ikwanayo ne-non-current limit fuse yokukhusela i-current encinci, kwaye ukhuseleko lwe-break luphela lunokufezekiswa.