High Impedance Differential Protection GRB150

GRB150 is a numerical high impedance differential relay and can be applied for :

1. Restricted earth fault protection

2. Single, double, or one-and-a-half busbar protection

3. T-zone protection of one-and-a-half busbar arrangement

4. Short line cable protection

1. Metering
   - Differential voltage

2. Recording
   - Event record
   - Fault record
   - Disturbance record

3. Calendar and Time
   - IRIG-B port for external clock

1. Liquid Crystal Display (LCD) display with operation keys
   - Relay setting and data display

2. Personal computer (PC) interface
   - Relay setting
   - Recorded data display
   - Waveform analyzing

1. Automatic monitor