Home / Relay / toshiba relay / Toshiba protection Relays GR-100 Series Busbar Protection GRB100
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GRB100 is a numerical low impedance differential relay for busbar protection, available in centralised and de-centralised configurations. GRB100 can be applied for various busbar systems, such as single busbar, double busbar, one and a half busbar, four bus-coupler busbar, ring busbar and busbar with transfer bus. Two differential elements for check zone and discriminating zone, a countermeaure for CT saturation and optional undervoltage fault detectors provide for an extremely high degree of reliability. Optional circuit breaker failure protection is available, and in addition there are standard GR-series features such as metering, data recording and communications