DC Switchgears 600...3300 V.   Single-line diagram

Type of cubicle Designation
 Cathode  For traction substation rectifier cathode circuit switching and protection
 Line  For the line supply circuits switching and protection
 Reserve, Stand-by  For the line supply circuits switching and protection as a backup unit for line switchgear
 Sectioning  For busbars sectioning
 Earthing  For operating busbar earthing
 Reactor  For exhaust reactor connection to power circuit
 Negative  For closing and opening of negative line dead sections