Product/Technical Services
High Impedance Differential Protection GRB150
Product Overview
GRB150 is a numerical high impedance differential relay and can be applied for :
Restricted earth fault protection
Single, double, or one-and-a-half busbar protection
T-zone protection of one-and-a-half busbar arrangement
Short line cable protection
Technical Description
Protection functions
Busbar protection for single, double and one-and-a-half busbars
Restricted earth fault protection
T-zone protection of one-and-a-half busbar arrangement
Short line cable protection
Secure operation against CT saturation
CT supervision
Single- or three-phase models
Metering and recording functions
Metering
- Differential voltageRecording
- Event record
- Fault record
- Disturbance recordCalendar and Time
- IRIG-B port for external clock
Menu-driven human interfaces
Liquid Crystal Display (LCD) display with operation keys
- Relay setting and data displayPersonal computer (PC) interface
- Relay setting
- Recorded data display
- Waveform analyzing
Automatic supervision
Automatic monitor