Three Phase Voltmeter & Frequency Meter DV-03 (D)

In three phase systems, it measures RMS values of AC voltages and system frequency sensitively. Using up direction button (Select) phase-neutral voltages and phase-phase voltages monitor sequentially.

IMPORTANT: L1 - N is device supply inputs.
Thus, the applied L1 – N voltage must be rated voltage of system.
The measured frequency also must the frequency of the system.