Skip to content
Sitemap Privacy Policy
Electrical Classroom
  • Basics
    • Charge
    • Voltage
    • Current
    • Resistance
    • Capacitance
    • Inductance
    • Conductance
    • Power
    • Energy
    • Electromagnetic Induction
    • AC Basics
      • AC Basics
      • Real Power
      • Reactive Power
      • Complex and apparent Power
  • Circuit Theory
    • Electric Circuit
    • Series and Parallel Connections
    • Faraday’s law
    • Lenz’s law
    • Ohm’s Law
    • Kirchoff’s Laws
    • Voltage Division
    • Current Division
    • Thevenin’s Theorem
    • Norton’s Theorem
    • Maximum Power transfer theorem
    • Superposition theorem
  • Machines
    • Transformers
      • Transformer Action
      • Ideal Transformer
      • EMF equation
      • Equivalent circuit and Phasor diagram
      • Voltage regulation
      • Parts of a transformer
      • Transformer tresting
      • Load losses and No-load losses
      • Types
        • Core type and shell type transformers
      • Magnetization current
      • Magnetization inrush
      • High Leg delta connection
      • Buchholz relay
      • Autotransformer
      • Selection
        • Frequently asked questions-1
        • Frequently asked questions-2
        • Frequently asked questions-3
      • Transformer noise
      • Transformer kVA calculator
      • Transformer turns ratio
    • Instrument transformers
      • Potential transformers
      • Current transformers (CT)
      • CT v/s PT
  • Power system
  • Switchgears
  • Q&A
  • Articles
  • Tools
Menu Close
  • Basics
    • Charge
    • Voltage
    • Current
    • Resistance
    • Capacitance
    • Inductance
    • Conductance
    • Power
    • Energy
    • Electromagnetic Induction
    • AC Basics
      • AC Basics
      • Real Power
      • Reactive Power
      • Complex and apparent Power
  • Circuit Theory
    • Electric Circuit
    • Series and Parallel Connections
    • Faraday’s law
    • Lenz’s law
    • Ohm’s Law
    • Kirchoff’s Laws
    • Voltage Division
    • Current Division
    • Thevenin’s Theorem
    • Norton’s Theorem
    • Maximum Power transfer theorem
    • Superposition theorem
  • Machines
    • Transformers
      • Transformer Action
      • Ideal Transformer
      • EMF equation
      • Equivalent circuit and Phasor diagram
      • Voltage regulation
      • Parts of a transformer
      • Transformer tresting
      • Load losses and No-load losses
      • Types
        • Core type and shell type transformers
      • Magnetization current
      • Magnetization inrush
      • High Leg delta connection
      • Buchholz relay
      • Autotransformer
      • Selection
        • Frequently asked questions-1
        • Frequently asked questions-2
        • Frequently asked questions-3
      • Transformer noise
      • Transformer kVA calculator
      • Transformer turns ratio
    • Instrument transformers
      • Potential transformers
      • Current transformers (CT)
      • CT v/s PT
  • Power system
  • Switchgears
  • Q&A
  • Articles
  • Tools

What is an Electric Motor?

An electric motor is an energy transformation machinery. It transforms electrical energy into mechanical energy. In other consumes electrical energy and delivers mechanical energy in the form of rotations. For…

Continue ReadingWhat is an Electric Motor?

Generate electricity from electricity – Is that possible?

“Can we generate electricity from electricity?”  This is a quite common question that many people ask. The answer for this question is amazingly simple but tricky. We need to understand…

Continue ReadingGenerate electricity from electricity – Is that possible?

Why are overhead transmission lines not insulated?

Overhead transmission lines are not insulated primarily due to three reasons: first and foremost is to reduce the weight of the lines, secondly to save cost and the last is…

Continue ReadingWhy are overhead transmission lines not insulated?

Difference between utilization categories AC-1 and AC-3

The utilization categories AC-1 and AC-3 defines making, breaking and continuous operation current rating for contactors. Based on these rating, contactor for switching of resistive loads and switching of squirrel…

Continue ReadingDifference between utilization categories AC-1 and AC-3

Top 10 tricks to save on electricity bills

A few small behavioural changes and other adjustments can help us save electricity as well as electricity bills. By saving electricity we are not only saving money but also saving…

Continue ReadingTop 10 tricks to save on electricity bills

Calculate the power consumption of AC & Electricity usage

Its hot inside lets turn on the AC!! The air conditioner is one of the high power consuming appliances at home. During sunny days you might have noticed a drastic…

Continue ReadingCalculate the power consumption of AC & Electricity usage

Thevenin’s Theorem -explanation, equivalent circuit & examples

Circuits can contain many power sources and power dissipation elements. It is common that any one of the elements in the circuit is a variable while all others are fixed.…

Continue ReadingThevenin’s Theorem -explanation, equivalent circuit & examples

High Leg delta connection

Power is transmitted over long distances at high voltage. In order to supply domestic and residential applications, it needs to be stepped down to 120V or 230V single phase. This…

Continue ReadingHigh Leg delta connection

Electrical wiring color codes – Important

Electrical engineers and electricians follow predefined wiring color codes while wiring houses, commercial buildings and industrial panel boards. It is mandatory to know the electrical wiring color codes before attempting…

Continue ReadingElectrical wiring color codes – Important

Difference between NO and NC

In every control circuits and automation systems, logic is developed based on the open or closed state of switches, sensors or relays. Hence it is mandatory to know the concept…

Continue ReadingDifference between NO and NC
  • 1
  • 2
  • Go to the next page

Find a content

Like & Follow us

Follow @electricclassro

Related articles

  • Why are overhead transmission lines not insulated?
  • Torque-speed calculator & speed-torque calculator
  • Star-delta starter (Wye-Delta Starters) – Circuit, working
  • Which is the most efficient electrical machine?
  • Difference between single-phase and three-phase power AC supplies
  • Top 5 differences between MCB and RCCB
  • Ideal Transformer
  • Difference between NPN and PNP transistors | NPN vs PNP Transistor
  • Thevenin’s Theorem -explanation, equivalent circuit & examples
  • What are the essential components of a protective relay?
  • Induction motor slip calculator
  • Insulation materials used in transformers
  • Interview question – Induction Motors
  • Transformer FAQ and Transformer Interview Questions
  • Magnetization inrush current in a transformer
  • On which part of the power system, the occurrence of failure / abnormal condition is more?
  • Differences between resistance and resistivity
  • Parts of a transformer
  • MCB Trip Curves – B, C, D, K and Z trip curves
  • Torque-power calculator & power-torque calculator
Copyright © 2022 Electrical Classroom. Contents may not be reproduced. Our Site uses cookie. By continuing to use our site you are agreeing to our Cookie policy DMCA.com Protection Status