Built-in high-performance micro controller with high reliability and strong resistance to interference.
Voltage value and fault message displayed through illuminated LCD.
Protection against over-voltage, under-voltage, phase failure, unbalance and phase sequence is available.
Protection parameters are set through keys, and the protection function can be turned on and off freely.
True RMS value measurement, voltage measurement accuracy ≤ 1%.
Working frequency 45Hz~65Hz.
Three-phase voltage value query through keys.
Testing and manual reset can be conducted through keys.
Three-phase four-wire system features Neutral-Phase failure protective function.