M-4272 Digital Motor Bus Transfer System

For Low Voltage (LV) and Medium Voltage (MV) Switchgear Applications.


  • Provides Automatic and Manual transfers of motor bus systems in power plants and industrial processing plants to ensure process continuity
  • Automatically selects Fast, In-Phase, Residual Voltage, and Fixed Time motor bus transfers, based on varying system conditions
  • Applicable for one way and bi-directional Manual and Automatic transfers
  • Can be expanded to accommodate multiple breaker configurations
  • Multiple setpoint profiles for various application requirements
  • Integrated control, supervisory functions, sequence of events, and oscillograph recording in one device
  • Extensive commissioning tools, including ringdown analysis
  • Optional M-3919A Graphic Display Unit (GDU) and Touch Screen Human Machine Interface (HMI) for communicating with one or two M-4272 units
  • Optional M-5072 Retrofit Kit for M-4272 Replacement of M-0272/M-0236B Analog Transfer Logic Controller

M-0423 10′ RS-232 Serial Null-Modem Cable

M-0433 10′ USB to Serial Adapter with RS 232 Serial Null-Modem Cable (DB9 to DB9)

M-3908 Universal Contact Input Adapter

M-3919A Graphic Display Unit/ Human Machine Interface

M-3933 10′ RS 232 Serial Modem Cable (straight through DB9 to DB25)

M-5072 Retrofit Kit for the Direct Replacement of the Analog M-0272 & M-0236B MBT System