Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

Definition and Working of Electronic VoltmeterDefinition: An electronic voltmeter is a type of voltmeter that employs an amplifier to enhance its sensitivity. It is a versatile instrument designed for measuring voltages in both alternating current (AC) and direct current (DC) devices. Thanks to its high input resistance, the electronic voltmeter can provide accurate voltage readings, making it a preferred choice in various electrical and electronic applications.Traditional moving - coil voltmete

What is Electronic Voltmeter?DefinitionAn electronic voltmeter is a voltmeter that utilizes an amplifier to enhance its sensitivity. It is capable of measuring the voltages of both AC and DC devices. Thanks to its high input resistance, the electronic voltmeter provides accurate readings.A moving - coil voltmeter struggles to detect low voltages, but the electronic voltmeter overcomes this limitation. The electronic voltmeter has high input impedance, enabling it to detect signals of extremely w

What is Differential Voltmeter ？Definition: A voltmeter that measures the difference between a known voltage source and an unknown voltage source is called a differential voltmeter. It operates based on the principle of comparing the reference voltage source with the unknown voltage source.The differential voltmeter offers very high accuracy. Its operating principle is similar to that of a potentiometer, and thus it is also known as a potentiometer voltmeter.Construction of Differential Voltmete

What is Creeping in Energy Meter？DefinitionCreeping in an energy meter is a phenomenon where the aluminium disc rotates continuously when only voltage is applied to the pressure coil and no current flows through the current coil. In essence, it is an error causing the energy meter to consume a minute amount of energy even when no load is connected to the meter.Impact and Causes of CreepingCreeping can increase the disc's rotation speed even under light - load conditions, leading to inflated mete

DefinitionAn electrostatic instrument is a device whose operation is based on the principle of attraction or repulsion between electrodes carrying electrical charges. In other words, it is an instrument that utilizes the static electric field to generate the deflecting torque. Electrostatic instruments are employed for measuring both high and low voltages, as well as the power in a given circuit.Working PrincipleThe electrostatic instrument operates on the principle of mechanical interaction bet

Differences Between Moving Coil Meters and Permanent Magnet Moving Coil (PMMC) MetersMoving coil meters and Permanent Magnet Moving Coil (PMMC) meters are both types of electromechanical instruments used to measure electrical quantities, but they have distinct differences in their construction, operation, and applications. Below is a detailed comparison of the two:1. ConstructionMoving Coil Meter Magnetic Field Source: In a traditional moving coil meter, the magnetic field is generated by a pair

How an AC High Voltage Tester Works and Where It Is Used1. Working PrincipleAn AC high voltage tester (AC High Voltage Tester) is an instrument used to evaluate the insulation performance of electrical equipment by applying a higher-than-normal operating voltage. It tests whether the insulation material can withstand this high voltage without breaking down or allowing excessive leakage current. Below is a detailed explanation of how an AC high voltage tester works:1.1 Basic ConceptsInsulation Wi

Main Applications of Megger Testing Equipment in Electrical EngineeringMegger is a renowned manufacturer of testing equipment specifically designed for electrical systems and devices, offering a wide range of tools such as insulation resistance testers, earth/ground resistance testers, high-voltage testers, and more. Megger equipment plays a crucial role in ensuring the safety and reliability of electrical systems. Below are the primary applications of Megger testing equipment in electrical engi

How Voltage Variations Cause Errors in Induction Type Energy MetersVoltage variations can lead to errors in induction type energy meters because the accuracy of these meters depends on precise measurements of both voltage and current. Here are the main reasons and mechanisms by which voltage variations cause errors in induction type energy meters:1. Voltage SensitivityImpact on Current Measurement: Induction type energy meters measure energy consumption by measuring both voltage and current. Var

Modern dielectric oil breakdown voltage testers are instruments used to measure the breakdown voltage of insulating oils, such as transformer oil and switchgear oil. These instruments are crucial in power systems, electrical equipment manufacturing, and maintenance to ensure the quality of insulating oils and the safe operation of electrical equipment. Here are the main features of modern dielectric oil breakdown voltage testers:Main FeaturesHigh Precision Measurement:Modern dielectric oil break