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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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Thermocouple Ammeter The working principle of Thermocouple Ammeter is based on the Seebeck effect, which was discovered in 1821. A thermocouple, made of two dissimilar metals (usually bismuth and antimony) …
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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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Moving Iron Instruments There are two basic forms of Moving Iron InstrumentsĀ i.e. the attraction type and the repulsion type. The operation of the attraction type depends on the attraction of …
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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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Automobile Battery Charger Using Full-wave Rectifier The battery charger shown in Figure A is used to recharge run-down lead-acid batteries in automobiles without removing them from their original mountings and …
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Charging Systems Charging System of batteries In various installations, batteries are kept floating on the line and are so connected that they areĀ being charged when load demands are light and …
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Battery Ratings To determine the battery ratings, following standards have been adopted, both by industry and government organisations to get a fair picture of battery quantity : 1. Ampere-hour Capacity: …
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