Posts by category

• Category: Automation
  • PLC, DCS, RTU, SCADA and PAC Systems
• Category: Circuit Theory
  • Difference between Neutral and Earth
  • 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
  • Ohm’s Law – Relationship between current and voltage
  • Conductance | What is conductance?
  • Capacitance| What is capacitance? | What is a capacitor?
  • Inductance | What is inductance? | What is an inductor?
  • Electric Resistance | What is Resistance?
  • What is an Electric Circuit?
  • Difference between volts and watts
  • What is Electric Power?
  • What is Energy?
  • Electric Current | What is Electric Current | Direction of flow of Electric Current
  • Voltage | What is Voltage? | Definition | Explanation | Example
  • What is short circuit?
  • Working of Diode rectifiers (Uncontrolled rectifiers)
  • What is inductance?
  • What is voltage?
  • What is resistance?
  • What is current?
• Category: Electrical Machines
  • Why is a transformer rated in KVA?
  • Transformer -FAQ | Interview Questions
  • Buchholz Relay | Buchholz relay – Principle of operation
  • What is meant by stalling of motor?
  • Asynchronous motor(Induction Motor) Starters | Comparison of induction motor starters
  • What will happen if a DC voltage is applied to the transformer coil?
  • Which is the most efficient electrical machine?
  • Operation of generators
• Category: Equipments
  • How does a LCD work?
  • Metal halide (MH) lamp
  • How refrigerators work?
  • How does a car Air Conditioner work?
  • How does a speaker work?
  • How does a scanner work?
  • Optical Mouse
  • Fluorescent lamps
  • How Does an incandescent Bulb Work?
  • How do CFL’s work / How are they different from Incandescent Lights?
• Category: Integrated Circuits
  • Difference between mico processors and micro controllers
• Category: Others
• Category: Power Electronics and Drives
  • Commissioning procedure for variable speed drive
  • Difference between Soft Starters and VFDs | Selection: Soft Starters v/s VFDs
• Category: Power system
  • Difference between Short circuit and overload
  • Power Factor – 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 switch gears
  • Miniature Circuit Breaker (MCB) – Principle of operation
  • Difference between MCB, MCCB, RCCB, RCBO and Isolator
  • Difference between circuit breaker and isolator
  • What is meant by B, C, D, K and Z curves in MCBs?
  • Difference between MCB and RCBO
  • Sizing of contactor and overload relay for 3 Phase DOL starter
  • Contactor – Construction, Operation, Application and Selection
  • Difference between MPCB and MCCB
  • Difference between RCCB and RCBO
  • What is there inside and MCCB?
  • Difference between MCCB and RCCB
  • What is the difference between MCB and MCCB?
  • Difference between contactors and relays
  • 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?
  • What is Buchholz relay? Why is it used?
• Category: Q&A
  • Why is one of the pins in a three pin plug longer and thicker than the other pins?
  • Why ammeter is connected in series
  • What is Comb Busbar?
• Category: Tools
  • Convert Kilovolt ampere (kVA) to kilowatts (kW)
  • Horsepower to kilowatts Convertor