Tag: Measuring Instruments

Induction Voltmeter Construction of Induction Voltmeter is similar to that of an induction ammeter except for the difference that its winding is wound with a large number of turns of fine …

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Induction Ammeters It has been shown in Article Induction type Voltmeters and Ammeters  above that the net torque acting on the disc of Induction Ammeters is T = K2 ωΦ1m …

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Induction type Voltmeters and Ammeters Induction type Voltmeters and Ammeters (instruments) are used only for A.C. measurements and can be used either as ammeter, voltmeter or wattmeter. However, the induction …

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Insulation Tester (Megger) Insulation Tester (Megger) is a portable instrument used for testing the insulation resistance of a circuit and for measuring resistances of the order of megaohms which are …

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Moving coil Instruments – Dynamometer type instrument There are two types of Moving coil Instruments (i) Moving coil Instruments – permanent magnet moving Coil type (PMMC) which can be used …

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Moving coil Instruments – Permanent Magnet Moving Coil There are two types of Moving coil Instruments (i) Moving coil Instruments – permanent magnet moving Coil type (PMMC) which can be …

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Extension of Range by Shunts and Multipliers (i) As Ammeter : The Extension of range by shunts and multipliers of the moving-iron instrument, when used as an ammeter, can be …

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Electrical Measuring Instruments Principle of Operation Electrical Measuring Instruments Principle of Operation depends for their action on one of the many physical effects of an electric current or potential and …

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