Alternating current AC

The moving-iron panel meters are mainly used for measuring AC currents and voltages in the frequency range of 15 … 100 Hz.

They indicate the rms value of the wave, even with high harmonics, with a minor ininfluence on the accuracy.

Our instruments are normally calibrated for sinusoidal AC. 

For current above 100A or high voltages, the instruments must be connected through measuring transformers.
Movin iron instruments can be connected in any order without observation of polarity (ki) on the current transformer.

The moving-coil rectifier panel meter are suitable for measuring sinusoidal AC currents and voltages.

The frequency range for voltmeters an milliammeters up to 600 mA is 25 to 10.000 Hz.

For current higher than 1A – 5A, the frequency can not exceed 50 or 60 Hz. (On request: 400 Hz).

It is possible to measure higher currents and voltages connecting the instruments through suitable measuring transformers.

GENERAL CHARACTERISTICS