Abb offers various types of motor protection relays. The motor protection relay spac 320 c is designed to be used as a cubicle-oriented protection and local/remote control interface unit for one motor feeder. In addition to the protection, control and measurement functions, the relay is equipped with data communication properties needed for control of the switching devices of a motor feeder cubicle. Communication with higher-level substation control systems is carried out via a fibre-optic serial bus
