Posts by category
- Category: Automation
- Difference between 2-wire, 3-wire, and 4-wire signal transmitter connections
- Sinking and Sourcing Concepts and their differences
- The Concepts of a 4-20mA current Loop
- Top 10 DCS Companies in the world
- Top 10 Industrial Automation companies in the world
- Difference between PLC and DCS
- Types of Proximity sensors and their applications
- Electromechanical relays vs solid-state relays
- Difference between NO and NC
- Digital I/O and Analog I/O
- PLC, DCS, RTU, SCADA and PAC Systems
- Category: Basics
- Electrical terms and their definitions
- Electromagnetic Induction
- Faraday’s law of electromagnetic induction
- Lenz’s law
- What is kVA?
- Real, Reactive, Complex and Apparent power
- Basics of Alternating current
- Conductance | What is conductance?
- Capacitance| What is a capacitor?
- Inductance | What is an inductor?
- What is Electric Power?
- What is energy?
- What is Resistance?
- Electric Current and Current Flow
- Electric Charge
- Voltage and Electric potential difference
- The direction of electric current
- Category: Circuit Theory
- Steps to convert Thevenin’s circuit to Nortons
- Maximum Power transfer theorem
- Superposition theorem
- Current Division rule
- Norton’s Theorem
- Thevenin’s Theorem -explanation, equivalent circuit & examples
- Kirchhoff’s laws – voltage and current laws – Explained
- Ohm’s Law – Relationship between current and voltage
- Difference between over-current and overload
- Transformer Action
- Difference between Higher potential and lower potential
- Voltage division rule | Potential divider circuit
- Series and Parallel circuits
- What is an Electric Circuit?
- Difference between volts and watts
- Working of Diode rectifiers (Uncontrolled rectifiers)
- What is inductance?
- What is voltage?
- Category: Definitions
- Category: Electrical Machines
- Materials used in an electric motor
- Transformer Tap changers: Off-Load and On-Load tap changers
- Rogowski Coils
- Transformer cooling methods
- Types of Transformer windings
- Insulation materials used in transformers
- Transformer core
- Hysteresis loss and Eddy current loss and their difference
- Parallel operation of transformers – Connection & 5 conditions for perfect operation
- Instrument transformers – Definition, types and connection
- Difference between current transformers and Potential transformers
- Current transformers (CT)- working, types and connection
- Transformer losses – Load losses and No-load losses
- Motor rated current v/s Full load current v/s Nominal current
- What is an Electric Motor?
- EMF equation of an alternator and solved problems
- EMF equation of DC machines
- EMF equation of transformers
- Parts of a motor
- Star-delta starter (Wye-Delta Starters) – Circuit, working
- Comparison of core type and shell type transformers
- Selection and sizing of transformers – made easy
- Autotransformer – Principle, advantages, copper savings
- Parts of a transformer
- K-factor rated transformers
- Magnetization inrush current in a transformer
- Transformer noise (Humming sound of transformers)
- Open circuit test & Short circuit test in transformers
- Equivalent circuit and Phasor diagram of a transformer
- Ideal Transformer
- An overview of Electric Machines
- Types of electric transformers
- Voltage regulation of transformers
- Transformer – Operation, construction and types
- Transformer – FAQ | Interview Questions -Part 3
- Transformer FAQ | Interview Questions -Part -2
- Why are transformers rated in KVA?
- Types and comparison of induction motor starters
- Which is the most efficient electrical machine?
- Operation of generators
- Category: Electronics
- Parallel Slave Port (PSP)
- Difference between ARM and Thumb states (ARM vs. thumb)
- Common emitter configuration of BJT
- Difference between BJT and MOSFET
- MOSFET – Structure, working principle, symbol and applications
- BJT – Bipolar Junction Transistors
- Transistors – Learn all about transistors
- Diode ratings – How to understand a diode datasheet?
- PN Junction Diodes
- Zener diodes – Operation, Symbol and V-I Characteristics
- Category: Equipments
- Category: Integrated Circuits
- Category: Interview Questions
- Category: Others
- Category: Power Electronics and Drives
- Load Sharing in AC Drives (VFD / VSD)
- Gate turn-Off thyristor (GTO)
- MOS Controlled Thyristor (MCT)
- MOS Turn-Off Thyristor (MTO)
- TRIAC – Operation, symbol, circuits & applications
- Thyristors and their types
- SCR – Silicon Controlled rectifier
- IGBT – Insulated Gate Bipolar Transistor
- Commissioning procedure for VFD (Variable Frequency Drive)
- Difference between soft starters and VFDs
- Category: Power system
- Impact of Surface Topologies on Electrical Properties of High Voltage Power Transmission Lines
- Ground potential rise
- Factors influencing requirements for a good grounding system
- Fall of potential method or 3-point method for Earth resistance measurements
- Soil resistivity measurement methods
- Types of Electrical Earthing as per IEC 60364 & BS 7430
- Resistance grounded system
- Solidly grounded or Effectively grounded system
- Ungrounded systems
- Types of grounding
- Why is electricity transmitted at high voltages?
- Difference between Short circuit and overload
- Power Factor – Definition, Importance, Calculation and Correction techniques
- What is ammeter selector switch?
- Why the power system is divided into several protections zones?
- Which is the most common fault occuring in the power system?
- What are the different faults occurring in the overhead transmission lines?
- On which part of the power system, the occurrence of failure / abnormal condition is more?
- Comparision of conventional energy resources
- How do Fuel Cells Work?
- Category: Protection and switchgears
- Understanding Issues with Contactors and Relays
- What is a motor control center (MCC)?
- Methods of Ground/ Earth resistance measurements on existing systems
- Grounding transformer or Earthing transformer
- Dual-element time-delay fuses
- Resonant grounded system (Ground-Fault Neutralizer)
- Reactance grounded system or inductance grounded system
- Ingress protection rating or IP rating (IEC 60529)
- Star-Delta starter wiring diagram – Control and power wiring diagrams
- MCCB – Molded Case Circuit Breaker | Working Principle | Ratings
- Surge Protection Device (SPD) | Surge protector
- Drawout circuit breaker positions and indications explained
- Top 5 differences between MCB and RCCB
- Potential transformers | Voltage transformers (PT)
- An overview of switchgear
- Earth Leakage Relay (ELR)
- Top 3 causes behind a circuit breaker trip | MCB Trip
- Utilization categories for low voltage switchgear
- Difference between earth leakage relay and earth fault relay
- What is an arc chute?
- Overload relay – Principle of operation, types, connection
- What is an MCB?
- Miniature circuit breaker (MCB) – Principle of operation
- Difference between MCB, MCCB, RCCB, RCBO and Isolator
- Buchholz relay – Working Principle, Construction and Operation
- Selection of contactor and overload relay for DOL starter
- Contactor – Construction, Operation, Application and Selection
- Difference between MPCB and MCCB
- What is there inside and MCCB?
- Difference between MCCB and RCCB
- Difference between MCB and MCCB
- Difference between contactor and relay
- Why are potential transformers used in power system?
- Why are current transformers used in power system?
- What are the basic requirements of a protection system used in a power network or equipment?
- What are the essential components of a protective relay?
- What are the main functions of a protection relay?
- What is a protection relay?
- How rating of a circuit breaker for a system is determined?
- Category: Q&A
- Differences between GTO and SCR
- Difference between AC contactors and DC contactors
- Are earthing and grounding the same?
- Neutral-to-Earth/ground Voltage- Causes, effects, and solution
- Difference between grounding/earthing and bonding
- Electric current collectors
- Difference between Transistors and Thyristors
- The difference between kVA and kVAR
- What is PIV rating in a diode?
- Difference between resistance and impedance
- Difference between EMF and Voltage
- Difference between volts and amps | Volts vs amps
- Differences between resistance and resistivity
- Ultimate breaking capacity (Icu) and Service breaking capacity (Ics) – IEC 60947-2
- What is induced current?
- Difference between NPN and PNP transistors | NPN vs PNP Transistor
- What is magnetization current in a transformer?
- Top 5 differences between kW and kVA
- What is meant by plugging a motor?
- Generate electricity from electricity – Is that possible?
- Top 5 differences between fuses and circuit breakers
- Why are overhead transmission lines not insulated?
- Difference between fuse and MCB
- Difference between utilization categories AC-1 and AC-3
- How to save on electricity bills?
- High Leg delta connection
- Electrical wiring color codes – Important
- What is kA rating (breaking capacity) of MCB and MCCB?
- Electric Short Circuit
- Difference between single-phase and three-phase power AC supplies
- Why is the earth pin in a three-pin plug longer and thicker than the other pins?
- Difference between neutral and earth / ground
- Why ammeter is connected in series?
- Difference between circuit breaker and isolator
- MCB Trip Curves – B, C, D, K, and Z trip curves
- Difference between MCB and RCBO
- What is meant by stalling of motor?
- Difference between RCCB and RCBO
- What will happen if a DC voltage is applied to a transformer coil?
- What is Comb Busbar?
- Category: Tools
- Power consumption of pool pump
- Transformer current calculator
- Transformer sizing calculator
- Power consumption and energy usage of humidifiers
- Power consumption and energy usage of exhaust fans
- Torque-speed calculator & speed-torque calculator
- Torque-power calculator & power-torque calculator
- Motor locked rotor current calculator
- Simple motor rated current calculator with calculation steps
- Induction motor slip calculator
- Number of poles calculator
- Synchronous speed calculator
- Motor torque calculator | Full load torque of a motor
- Motor FLC calculator | Motor Full load current calculator
- Star-Delta starter design tool | Wye-Delta starter design tool
- Direct-on-line starter | DOL starter selection tool
- Resistance calculator
- Power consumption & Energy usage of CFL lamps
- Power consumption and energy usage of cooker hood
- Power consumption and energy usage of rice cooker and Steamer
- Power consumption of Xbox and PlayStation
- Power consumption and energy usage of induction cooktops
- Power consumption & energy usage of freezers
- Power consumption and energy usage of deep fryers
- Power consumption and energy usage of air purifiers
- Power consumption and energy usage of space heaters
- Power consumption and energy usage of juicers
- Power consumption and energy usage of Mixer grinders
- Power consumption and energy usage of blenders
- Power consumption and energy usage of electric kettle
- Power consumption and energy usage of coffee makers
- Power consumption and energy usage of toasters
- Power consumption and energy usage of hairdryers
- Power consumption and energy usage of water heater
- Power consumption and energy usage of refrigerators
- Power consumption and energy usage of vacuum cleaner
- Power consumption and energy usage of Microwave oven
- Power consumption & energy usage of dishwashers
- Power consumption & Energy usage of Clothes Dryer
- Amps to kVA | Amperes to kVA converter
- kVA to Amps | kVA to Amperes converter
- Transformer kVA calculator – Based on load
- Power consumption & energy usage of ceiling fans
- Power consumption & energy usage of air conditioners
- Calculate the power consumption of AC & Electricity usage
- Power consumption & energy usage of electric iron
- Power consumption & Energy usage of LED lamps
- Voltage regulation calculator
- Ampere to Kilowatt | Amps to kW converter
- kW to Amps Converter | Kilowatt to Ampere
- Kilowatt to Kilo-volt-ampere (kW to kVA) Converter
- Transformer turns ratio calculator online
- Kilovolt ampere to kilowatts (kVA to kW) converter
- kW to HP converter | Kilowatts to Horsepower converter
- Horsepower to kilowatts (hp to kw) Converter