Moving Iron Instrument | Types of Moving Iron Instruments: Moving Iron Instrument can be classified into attraction and repulsion types. Repulsion type instruments are the most commonly used. Iron vane ammeters and voltmeters depend for…
Electrodynamometer Instrument: Electrodynamometer Instrument - The D'Arsonval movement responds to the average or dc value of the current flowing through the coil. If ac current is sought to be measured, the current would flow through…
Taut Band Instrument: The Taut Band Instrument utilizes the same principle as the D'Arsonval movable coil and fixed magnet. The primary difference between the two is the method of mounting the movable coil. The taut…
Practical PMMC Movement: The basic Practical PMMC Movement (also called a D'Arsonval movement) offers the largest magnet in a given space, in the form of a horse-shoe, and is used when a large flux is…
Permanent Magnet Moving Coil Instrument (PMMC): In this type of Permanent Magnet Moving Coil Instrument (PMMC), we have a coil suspended in the magnetic field of a permanent magnet in the shape of a horse-shoe.…
Working Principle of D Arsonval Galvanometer: The action of the most commonly dc meter is based on the fundamental principle of the motor. The motor action is produced by the flow of a small current…
Different Types of Ammeters and Voltmeters: The following are the different types of ammeters and voltmeters in measuring instruments are PMMC Moving Iron Electrodynamometer Hot wire Thermocouple Induction type Electrostatic Rectifier Of these, the PMMC…
Trends in Voltage Stability of Power Systems: Trends in Voltage Stability of Power Systems - The present day transmission networks are getting more and more stressed due to economic and environmental constraints. The trend is…
Prevention of Voltage Collapse in Power System: Prevention of Voltage Collapse in Power System is given by 1. Application of reactive power-compensating devices: Adequate stability margins should be ensured by proper selection of compensation schemes…
Voltage Stability Analysis: The voltage stability analysis for a given system state involves examining following two aspects. Proximity to voltage instability: Distance to instability may be measured in terms of physical quantities, such as load…