Home > Grid Automation > Protection Relays > Single Function > DFF Digital Frequency Relay | |||||||||||||||
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The DFF is a digital relay used to supervise the frequency of the power system and provide load shedding capabilities. The DFF is applied directly to a generator to protect against those abnormal conditions that result in frequency fluctuations, and throughout the system to "shed" load in an attempt to regain frequency stability. Load shedding frequency schemes Underfrequency protection Under and overvoltage protection 33 configurable outputs 14 configurable inputs Event record, last 150 events Oscillography, 4 records Voltage: 16 samples per cycle Keypad and LCD display 16 configurable LEDs Front RS232 port Rear RS232, RS485, or fiber optics Software provided
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