Frequency monitoring relay – HRF-10

• The relay serves to monitor frequency of AC voltage, e.g. in photovoltaic
power stations, generators.
• The monitored frequency 50 / 60 / 400 Hz is selected by a switch.
• Supplied from monitored voltage.
• Two adjustable levels of frequency (Fmin, Fmax) in the range of 80 –
120 % Fn.
• Adjustable diff erence level.
• Adjustable delay level.
• Switchable ranges of rated frequency Fn.
• 3-MODULE design, DIN rail mounting