Differential bus protection relay
B 90
GE Digital Energy
Comprehensive and scalable bus and breaker fail protection for LV, HV and EHV busbars. The B90, a member of the UR Family, features integrated protection and breaker failure for re-configurable LV, HV, EHV multi-section busbars up to 24 feeders. Use one or more B90s together to build a sophisticated protection system that can be engineered to meet the specific application requirements. The B90 performs fast and secure low impedance bus protection with sub-cycle tripping time averaging 0.75 cycles.
B30 Bus Differential System
Cost effective bus protection and metering for up to six feeders. The B30, a member of the UR Family, is a digital device that features integrated protection for HV and EHV busbars, providing cost effective, feature focused busbar protection. Use the B30 to protect busbars with up to 6 feeders, 1 zone. Consider the B30 as a cost effective alternative to high impedance schemes, ideal for breaker-and-a-half bus schemes, with integrated feeder backup protection and metering.
