Speed control of Induction Motor
The speed of an induction motor is given as N = 120f/p (1-S). So obviously the speed of an induction […]
Electrical Machine
Electrical Appliance
LED Lamp: Technologies, Types and their Applications
What is an LED? LEDs are semiconductor diodes, electronic devices that permit current to flow in only one direction. The
Transformer
Overhauling of Power Transformer in power system
Steps for Transformer overhauling Overhauling of transformer is required either due to ageing of transformer or due to fault of
Renewable Energy
Solar Power plant: Components, Installation, Site survey and Evaluation
Solar plant system components The four major components of a solar energy system are the panels, inverter, racking and solar
Electrical Substation
What is Tripping circuit and Trip circuit Supervision relay
Tripping Circuit There are three main circuits in use for circuit breaker tripping: Series sealing Shunt reinforcing Shunt reinforcement with
Electrical Machine
Capacitor Start and Capacitor Start Capacitor Run Induction Motor
Capacitor Start Induction Motor The construction of this type of motors is similar to the resistance split phase type. The
Electrical Substation
Protective Relay testing- Type test on Protective Relay
Type tests on Relay Type tests are required to prove that a relay meets the published specification and complies with
Electrical Machine
Start and Stall protection of Induction Motor
What is Start and Stall protection of Motor? When a motor is started, it draws a current well in excess
Electrical Substation
Power line carrier communication (PLCC) in Substation
What is PLCC (Power Line Carrier Communication) PLCC is used for tele-communication, tele-monitoring and teleprotection between electric substations through high
Electrical Substation
Types of Relay used in power system in detail
What is Relay? It is necessary to remove a fault from the power system as quickly as possible for healthy
Trending
Power quality issues of rooftop solar PV plant on LV distribution
Power quality issues of Rooftop Solar PV Voltage flicker Variation of input voltage sufficient in duration to allow visual observation
Renewable Energy
Solar Collector: Definition, Types and Flat plate Solar collector
What is Solar collector? Sun’s heat energy is a diffuse energy. It is always first collected and then concentrated. In
Electrical Substation
What is Flexible Alternating Current Transmission and FACT device
What is Flexible Alternating Current Transmission or FACTs FACTS as they are generally known, are new devices that improve transmission
Transmission Line
Types of Faults and analysis in Power system
Fault in Power system A fault in a power system or circuit is a failure which interferes with the normal
Transformer
Scott-T Transformer: working , Diagram and Application
Scott Connection of Transformer The Scott connection, also known as the Scott-T transformer connection, is a circuit that enables the
Transmission Line
HVDC Transmission: Types of HVDC link and components
Introduction Electric power transmission was originally developed with direct current. The availability of transformers and the development and improvement of
Electrical Appliance
What is Energy meter or Watt hour meter and their construction and diagram
Energy meter or Watt hour meter Single phase induction type energy meter is also popularly known as watt-hour meter. This
Electrical Substation
What is Power quality measurement and Power quality measurement device
What Is Power quality measurement Solving power quality problems depends on acquiring meaningful data at the optimum location or locations
Circuit Breaker
Circuit Breaker working principle and Methods of arc extinction
What is Circuit Breaker? In electrical circuits, a Circuit breaker is used for making and breaking the circuit. As per
Electrical Substation
Bus bar protection scheme in a substation
Introduction of Bus bar protection Bus bar protection scheme shall be provided for 220KV system where the sub-station layout arrangement
Electrical Substation
DC distribution in 132 KV, 220 KV, 400 KV Control and Relay Panel in substation
DC distribution for 400KV system Two sets of batteries (220v), their respective chargers and DC boards shall be used for
Circuit Breaker
Types of Circuit Breaker testing and SF6 breaker testing
Circuit Breaker Insulation Resistance Test Use Megger to measure insulation resistance. Insulation Resistance Tests to be done: Pole – Pole
Circuit Breaker
ELCB: Working principle, Full name and Circuit diagram
Full name of ELCB ELCB-Earth Leakage Circuit Breaker What is ELCB An ELCB is one kind of safety device used
Circuit Breaker
Types of Circuit Breaker and their working principle
Types of Circuit Breaker The CBs are of six types: Oil circuit breaker Air circuit breaker SF6 circuit breaker Vacuum
Transformer
What is DGA(DISSOLVED GAS ANALYSIS) for transformer oil
What is D.G.A. ? It is study of gases formed in the transformer oil. It is a diagnostic tool helping
Circuit Breaker
HVDC Circuit breaker: Working, Types and Application
Fullname of HVDC CB High Voltage Direct Current Circuit Breaker (HVDC CB) Definition of HVDC Circuit breaker Circuit breakers will
Electrical Substation
What is Float charging and Boost Charging of battery
What is Battery charger Battery charger is battery charging equipment which used float and boost charging techniques for battery charging.
Electrical Appliance
What is Clamp on Ammeter and working and measurement procedure
Introduction The clamp on ammeter is a portable instrument designed to give a quick measurement of current flow, without breaking
Electrical Substation
What is Reactive Power and Reactive Power compensation,it’s calculation
Definition of Reactive Power Reactive power(VARs) is defined as the amount of power that remains unused and gets generated within
Transformer
Types of Transformer Losses and their calculation formula
Definition of Loss Loss in any machine is broadly defined as difference between input power and output power.An electrical transformer