... , fuse base, fuse holder, fuse connector, fuse isolation switch, fusesHH15(QSA) series switch fuses(fuse-combination switches), HH15A (QA) and HH15P ... main switch or master switch for infrequent operation. Among them, QSA series switches can be used for short-circuit protection, and ... widely applied to high-class withdrawable low voltage complete sets. QSA Series switch fuses(fuse-combination switches)