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Showing 10-18 of 25 results
Transformer Percentage Impedance Testing

How to Test Percentage Impedance of Transformer?

  • Categories Transformer, Electrical Machines, Measurement, Power System, Substation

This article covers transformer impedance testing, one of the acceptances tests for new transformers, and a method for routine testing. The results of this test should compare directly to the …

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Three wattmeter method of measuring three phase power

Measurement of Three Phase Power | Wattmeter Methods

  • Categories Measurement, Basic Electrical, Instrumentation, Power System, Substation

This article explains the measurement of three-phase power in star connected or delta connecter load using the wattmeter methods. The power in a three phase load can be measured by …

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Current 2BTransformer 2BConstruction 2Bor 2BCircuit 2BDiagram 2Band 2BSymbol

Current Transformer (CT) – Construction and Working Principle

  • Categories Circuit Breaker, Electrical Machines, Generation, Instrumentation, Measurement, Power System, Substation, Switchgear, Transformer

A current transformer (CT) is a type of transformer that is used to measure AC current. It produces an alternating current (AC) in its secondary which is proportional to the AC …

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dc motor voltage and power equations

Voltage and Power Equations of DC Motor | Condition of Maximum Power

  • Categories Electrical Machines, Basic Electrical, DC Generator, DC Motor, Measurement

In this post, we will look at the voltage and power equation of a dc motor and the condition for maximum power in a dc motor. Voltage Equation of a …

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insulation resistance measurement vs dielectric breakdown testing

Difference between Dielectric Testing & Insulation Resistance Measurement

  • Categories Measurement, Power System, Switchgear

All electrical installations and equipment comply with insulation resistance specifications so they can operate safely.  Whether it involves the connection cables, the sectioning and protection equipment, or the motors and generators, …

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Low voltage Switchgear

Low Voltage Switchgear

  • Categories Switchgear, Circuit Breaker, Electrical Relays, Generation, Instrumentation, Measurement, Power System, Substation

As per IEC 60947, switchgears with rated voltages up to 1000 V ac and 1500 V dc are termed as low voltage switchgear. The term ‘switchgear’ is a generic term …

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Types of analog instruments

Three Types of Analog Instruments

  • Categories Instrumentation, Basic Electrical, Measurement

An analog instrument is one in which the output or display is a continuous function of time and bears a constant relation to its input. The analog instruments find extensive …

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Solid State Relay

Solid State Relays (Static Relays)

  • Categories Power System, Basic Electrical, Circuit Breaker, Electrical Relays, Instrumentation, Measurement, Substation, Switchgear

What is a Static Relay? There are two basic classifications of relays – Electromechanical Relays and Solid State Relays (Static relay). One main difference between them is electromechanical relays have …

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load forecasting in power system

Load Forecasting – Purpose, Classification and Procedure

  • Categories Power System, Alternator, Basic Electrical, Generation, Measurement, Substation, Switchgear, Transformer

What is Load Forecasting? Electrical energy cannot currently be stored in large amounts. It has to be generated whenever there is a demand for it. It is, therefore, imperative for …

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