Advantages and Disadvantages of Moving Iron Instruments
Advantages
1. The instrument can be used both on DC
as well as on AC circuits.
2. These instruments are cheap, robust
and simple in construction.
3. The instruments have high operating
torque.
4. The instruments are reasonably
accurate.
5. These instruments can withstand
overload momentarily.
Disadvantages
1. Scales of these instruments are not
uniform because of pneumatic damping.
2. Errors are introduced due to change
of frequency I case of A.C.
3. Errors are introduce due to
hysteresis and stray magnetic field.
4. Power consumption is high.
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