Technology of Electrical Automatic

Why the meter display screen abnormal?

Due to the power grid quality problems of some power supply companies, the voltage fluctuation is too large, and the built-in 85-265Vac/dc switching power supply of standard products will automatically shut down to protect the equipment. Excessive harmonic generating equipment in the feeder network can also cause faults such as a dim screen or failure of the meter to start.


If your local can not find stable aux power supply, and need to use the power supply for phase to phase voltage, please contact Blue Jay’s sales team for 220V/110V transformer power supply, Old-style transformer-type AUX circuit is not sensitive to harmonic shocks. Projects in Southeast Asia, India and Africa usually have such faults, please contact your local electrical engineer to check the line harmonics.

P.S. In protection trigged, the meter will automatic off power until user restart the meter manually.


Meter IEC test reference:

  • IEC 61000-4-2 Electrostatic Discharge Immunity test, 4KV
  • IEC61000-4-4 Fast Transient Burst, 4KV
  • IEC61000-4-5 Surge Immunity Test, 3KV


A. Suggest install 1A fuse in the fire line side.

B. For the areas with poor power quality, suggest install lightning surge suppressor and rapid burst suppressor to prevent lightning strikes.