Electrical Engineering ⇒ Topic : Advantages and disadvantages of moving iron power factor

Advantages

• They are robust and simple in construction.
• The deflecting torque produced is greater than that of electrodynamic type.
• Since all the coils in the instrument are stationary, there are no electrical connections to the moving parts.
•  A wider scale extending upto 360° is available.

Disadvantages

• errors are introduced due to eddy current and hysteresis loss in the iron parts.
• The calibration of these instruments is affected by supply frequency, voltage and waveform.
• They are less accurate than the electrodynamic type