f Toshiba protection Relays GR-100 Series Distribution Range GRD100- A&S Automation Co., Ltd
 
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GRD100 is a series of multi-function protection relays, providing a comprehensive range of protection functions for distribution power systems, or alternatively acting as back-up protection for transmission systems. There are 4 sub-groups within the GRD100 series.GRD110: Overcurrent protection for phase and earth faults.GRD130: Over-voltage and under-voltage protection.GRD140: Directional overcurrent relay with auto-reclose.GRD150: Feeder management system, combining protection and control functions and featuring a large mimic display.

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