The action mechanism of this series of products is electromagnetic or magneto electric structure, which meets the actual needs according to the measured object of AC or DC circuit. The instrument adopts a plastic shell and glass window type, which is easy to install. The instrument can indicate the true effective value of AC current or voltage with a measurement frequency between 15-100Hz, regardless of the waveform of the system. This series of instruments is suitable for various power control equipment and scientific research departments to test and measure instruments. They are used for measurement on power distribution panels in power stations, power grids, and other power systems. The instrument usage conditions belong to Group B and can work normally in humid and hot environments.

Accuracy level: 2.5, basic error ± 2.5%, power consumption 0.2W, AC 50Hz, 2000V, duration 1 minute, operating environment -30~50 ℃, relative humidity ≤ 85% (25 ℃), Yin Ni response time ≤ 4 seconds.

The performance complies with GB/T7676-2017 and IEC60051 standards, and the shell size complies with IEC60473 and GB/T1242 standards; The ZN square series (48x48, 72x72, 80x80, 96x96) also complies with German DIN43700 and DIN61010 standards, as well as the RoHS directive.