Frequency/Voltage Protection GRF100

GRF100 is a voltage measuring relay which can be applied for under / over voltage protection, under / over frequency protection and rate-of-change-of-frequency protection.

1. Frequency and/or voltage protection for load shedding and synchronous machine protection

2. Four-stage underfrequency and/or overfrequency protection

3. Four-stage frequency rate-of-change (df/dt) protection (rate of rise and rate of decay)

4. Undervoltage block for frequency protection

5. Undervoltage and/or overvoltage protection (definite time and inverse time protection)

1. Metering
   - Power system voltages, frequency (max. and min.) and frequency rate-of-change (df / dt max.)

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