Power Quality Monitor

1. What applications is the SHDFR_PQ suitable for?
It is designed for distribution networks and large industrial and mining enterprises for power quality and transformer monitoring.

2. What power quality parameters can the device monitor in real time?
It monitors frequency, voltage, power, three-phase unbalance, harmonics, voltage fluctuation, and flicker in real time, and records and stores their trend data.

3. What statistics methods does the device support?
It supports compliance rate statistics for frequency, voltage, three-phase unbalance, harmonics, voltage fluctuation, and flicker by year, quarter, month, date range, or day.

4. Does it support transient disturbance recording?
Yes. The device supports transient disturbance-triggered recording of power quality events, facilitating the capture and analysis of transient power quality disturbances.

5. What is the sampling frequency and harmonic resolution?
The sampling frequency is 12.8 kHz, and the harmonic resolution is up to the 127th order.

6. What is the sampling accuracy?
At 25 °C and rated values, the current error is less than 0.15% and the voltage error is less than 0.1%, with a 16-bit A/D resolution.

7. What is the power consumption of the device?
The AC current circuit consumes less than 0.75 VA per phase at 5 A; the AC voltage circuit consumes less than 0.75 VA per phase; the DC power consumption (during operation) is no more than 50 W.