... alarm and temperature & humidity control.Since all kind of switchgear status indications, language alarming and T/H automatic control ... SGC-03T apply for many kinds of switchgear, for example, handcart switchgear, fixed switchgear. Product Functions in Details:-CB status indication ... protocol, 103 communication protocol. -Open hole size on CB panel: 220mm×165mm -EMC, apply for IEC255-22 -Design life ...