GE B30 | Bus Differential System

GE B30 | Bus Differential System

Cost-effective, low-impedance, biased bus differential protection for up to six feeders The B30 features integrated protection, control and metering for MV, HV and EHV busbars, providing cost-effective, feature-focused busbar protection. Use the B30 to protect busbars with up to 6 feeders with up to two three-phase differential zones. The B30 is a cost-effective alternative to high-impedance schemes, ideal for breaker-and-half bus schemes, with integrated feeder backup protection and metering.


  • Re-configurable simple bus applications, up to 6 feeders and 2 differential zones with breaker failure
  • Integrated bus protection and metering for HV and EHV substations

Key Benefits

  • High speed differential protection algorithm for sub-cycle trip times of 0.75 power cycle
  • Advanced IEC61850 Ed. 2 implementation, complete settings via SCL files and IEC 61850-9-2 process bus solution enable resource and platform managing optimization and reduce cost of ownership
  • Superior CT saturation detection with only 2 msec of saturation-free current for enhanced through-fault stability
  • Ambient temperature monitoring with alarms when temperature exceeds upper thresholds
  • Cost-effective alternative
  • Advanced automation capabilities for providing customized protection and control solutions
  • High-end fault and disturbance recording, including internal relay operating signals, eliminating the need for redundant recording devices
  • Application flexibility with multiple I/O options and programmable logic (FlexLogicâ„¢)
  • Robust network security enabling Critical Infrastructure Protection through user command logging, and dual permission access control
  • Simplified system integration supporting serial and Ethernet interfaces and multiple protocols
  • Supports English, French, Russian, Chinese, Turkish and German languages on the front panel, software and manuals

Functional Block Diagram

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