Electrical Engineering ⇒ Topic : Characteristics of Moving-Iron Instruments
Characteristics of Moving-Iron Instruments
(i) These are less expensive, robust and simple in construction.
(ii) These can be used for both d.c. and a.c. measurements. However, when used with *d.c., they are liable to small errors due to residual magnetism.
(Ill) These instruments have high operating torque.
(iv) These instruments are reasonably accurate.
(i)These instruments have non-linear scales.
(ii)These instruments are not as sensitive as the permanent-magnet moving coil instruments.
(ill) Errors are introduced due to change in frequency in case of a.c. measurements.
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