The PF-02 device monitors the terminal voltage frequency (e.g., the case of a hydro-generator, where the rated operating frequency is 50 Hz) and it mainly authorizes grid connection only when the frequency value falls within a preset range defined by a preset minimum frequency (lower threshold) and maximum frequency (upper threshold).

Main technical features:

the device monitors the voltage frequency at the generator terminals and authorizes its connection to the system only when the frequency value falls within a preset range, defined by a minimum and a maximum frequency;
the amplitude of the input voltage whose frequency is being monitored is 24–250V AC;
the input voltage frequency range is 0–99.9 Hz;
the numerical display of the frequency is established with a resolution of 0.1 Hz (3 digits);
programming the module's operating parameters (lower and upper thresholds of the monitored frequency, triggering delay, operating mode) is performed using three buttons located on the equipment's front panel;
the rocker switch for external command (triggering upon frequency exceeding the range) is at least 2A AC and 250V AC;
monoblock construction (approx. dimensions 105x100x65 mm) with DIN rail mounting;

PF-02 technical specifications (RO)